Reciprocating type hair trimmer

Abstract

The reciprocating type hair trimmer 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 part to rotate, the output part 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 part, and the movable knife is connected with the power system. 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] The present invention relates to the technical field of hair trimmers, and more particularly to a reciprocating hair trimmer. Background Art

[0002] There are many types of hair trimmers, such as razors, hair clippers, nose hair trimmers, etc., and each product is used independently. For example, a reciprocating razor consists of a body and a blade head. The blade head includes a blade net and blades. The body has a power system, which includes a motor, a battery, and a transmission device. The transmission device is generally composed of an eccentric wheel or a cam and a linkage mechanism, which transmits the power of the motor to the blades to achieve the horizontal reciprocating movement of the blades. Its working principle is as follows: power drive: after the motor built in the razor is powered on, electrical energy is converted into mechanical energy to generate a high-speed rotational movement; the transmission device will convert the rotational movement of the motor into a reciprocating linear movement of the blades. When the blades make a reciprocating movement, the beard will pass through the small holes of the blade net and contact the blades closely attached to the inner side of the blade net. The blades cut the beard during the reciprocating movement, thus realizing the shaving function.

[0003] A nose hair trimmer is a personal care appliance specifically used for trimming nose hair. Its main function is to trim overly long nose hair to ensure that the nose hair does not protrude, thereby maintaining personal image and nasal cavity hygiene. Currently, most nose hair trimmers on the market adopt a continuous rotary cutting method. For example, a nose hair trimmer blade head disclosed in CN111390981A includes a blade head cover, a blade head assembly, and a transmission member; the blade head cover is sleeved outside the blade head assembly, and the front end of the blade head cover is provided with pores for hair entry; the blade head assembly includes a first annular inner-toothed blade and a second annular inner-toothed blade. Both the first annular inner-toothed blade and the second annular inner-toothed blade include a circular ring substrate and circular teeth. The circular teeth are arranged on the inner side of the circular ring substrate and face the center of the circular ring substrate. The first annular inner-toothed blade is connected to the front end of the blade head cover, and the bottom surface of the first annular inner-toothed blade is attached to the top surface of the second annular inner-toothed blade; the transmission member is in transmission connection with the second annular inner-toothed blade, and the transmission member is used to drive the second annular inner-toothed blade to rotate. Under the transmission of the transmission member, the second annular inner-toothed blade rotates relative to the first annular inner-toothed blade to shear the nose hair. This method has many problems in actual use. Due to the different growth directions and states of nose hair, it is very difficult for the continuously rotating cutting blade head to cut the nose hair comprehensively and quickly, and there are often situations where the nose hair is pulled and not cut thoroughly, which not only brings discomfort to the user but also affects the trimming effect. Therefore, a new design of a reciprocating hair trimmer is needed to drive the inner blade in the nose hair trimmer blade head to make a rotary reciprocating swing relative to the outer blade to solve the problem of poor cutting effect of existing products. Summary of the Invention

[0004] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a reciprocating hair trimmer, which allows users to use the existing reciprocating shaver body, which can be adapted to the nose hair trimmer head at the same time and drive the inner knife to rotate and swing back and forth relative to the outer knife.

[0005] The technical solution of the present invention is as follows: a reciprocating hair trimmer comprises a reciprocating shaver body and a shaver head or a nose hair trimmer head adaptable to the body, wherein the reciprocating shaver body has a power system for driving at least one output member to rotate, the output member is arranged offset from the center of the motor output shaft in the power system, wherein the shaver head comprises a blade net, a movable blade and a blade head shell, the movable blade is transmission-connected to the output member, and the movable blade is driven by the output member to reciprocate linearly relative to the blade net to cut beard; wherein the nose hair trimmer head comprises a blade head assembly, a transmission member, a blade head shell and a shell seat, the blade head assembly comprises an inner blade and an outer blade, the inner blade is transmission-connected to the transmission member, the center of the transmission member is pivotally engaged on the shell seat, the transmission member has a power transmission part offset from its center, the power transmission part can receive the drive of the output member, thereby driving the transmission member to rotate and reciprocate around its central axis, and the inner blade is driven by the transmission member to rotate and reciprocate relative to the outer blade to cut nose hair.

[0006] By adopting the above technical solution: the design of the trimmer takes into account the functions of shaving and nose hair trimming, and the function can be converted by replacing different blade heads. It is convenient and practical and meets the diverse needs of users.

[0007] The power system of the reciprocating shaver body drives the output member to rotate through the motor output shaft. The design of the output member makes it deviate from the center of the motor output shaft. This layout optimizes the power transmission path. For the reciprocating shaver head, the output member drives the moving knife to move back and forth in a straight line in the knife net, effectively cutting the beard and providing a smooth and comfortable shaving experience. For the nose hair trimmer head, the output member drives the transmission member to rotate and reciprocate. Driven by the transmission member, the inner knife rotates and reciprocates relative to the outer knife. This design can accurately trim nose hair while avoiding damage to the skin.

[0008] The present invention is further configured that: the inner knife and the transmission member are indirectly driven, wherein the swing amplitude of the reciprocating motion of the inner knife is greater than the swing amplitude of the reciprocating motion of the transmission member.

[0009] With the above further settings, since the mesh holes of the cutter net of the shaver are fine and dense, even with a small swing amplitude, effective hair cutting can be completed. However, the nose hair trimmer has obvious differences in structure. Both its inner blade and outer blade are cylindrical, and knife teeth are distributed in a circular pattern at the end. Since the distribution of the knife teeth on the cutter head of the nose hair trimmer is relatively sparse, the swing amplitude of the reciprocating motion of the inner blade is designed to be greater than that of the reciprocating motion of the transmission part to increase the swing amplitude of the inner blade, thus adapting to the characteristic of the relatively sparse distribution of the knife teeth. When the inner blade rotates with a large swing amplitude, it can meet the swing amplitude requirements for trimming nose hair.

[0010] A further setting of the present invention: A transmission swing arm is provided between the transmission part and the inner blade. The transmission swing arm is pivotally joined to the housing base. One end of the transmission swing arm is in transmission connection with the eccentric transmission part on the transmission part, and the other end is in transmission connection with the driving part deviating from the center of the inner blade. The driving 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 driving part.

[0011] With the above further settings, the present invention cleverly utilizes the difference between the effective transmission arm lengths to produce the effect of increasing the swing amplitude of the inner blade, making it greater than the swing amplitude of the transmission part, thereby further improving the effect of trimming nose hair.

[0012] A further setting of the present invention: The transmission modes of the transmission swing arm with the eccentric transmission part and the driving part adopt gear meshing transmission or the cooperation of a transmission shaft and a transmission groove.

[0013] With the above further settings, both of these transmission modes can effectively ensure the stable transmission of power, further improving the trimming efficiency and trimming quality of the nose hair trimmer, enabling users to feel a smoother and more efficient experience when trimming nose hair.

[0014] A further setting of the present invention: The eccentric transmission part has a transmission shaft A or a transmission groove A. The transmission swing arm has a corresponding transmission groove A or a transmission shaft A deviating from its swing center. The transmission shaft A is inserted into the transmission groove A to achieve the transmission connection between the transmission part and the transmission swing arm; the driving part has a transmission shaft B or a transmission groove B. The transmission swing arm has a corresponding transmission groove B or a transmission shaft B deviating from its swing center. The transmission shaft B is inserted into the transmission groove B to achieve the transmission connection between the driving part and the transmission swing arm.

[0015] With the above further settings, the eccentric drive part has a transmission shaft or a transmission groove that deviates from the center of the drive member, and the drive swing arm is designed with a corresponding transmission groove or a transmission shaft that deviates from its swing center. When the transmission shaft is accurately inserted into the transmission groove, an efficient eccentric drive connection is achieved between the drive member and the drive swing arm, which is used to drive the drive swing arm to perform reciprocating rotational swinging. Similarly, the drive part also has a transmission shaft or a transmission groove that deviates from the center of the inner blade, and the drive swing arm is equipped with a corresponding transmission groove or a transmission shaft that deviates from its swing center. When the transmission shaft is accurately inserted into the transmission groove, the inner blade rotates synchronously with the drive part, and an efficient eccentric drive connection is formed between the inner blade and the drive swing arm, which is used to drive the inner blade to perform reciprocating rotational swinging.

[0016] A further setting of the present invention: A drive seat is provided on the inner blade, and the inner blade and the drive seat rotate synchronously, and the drive part is arranged on the drive seat.

[0017] With the above further settings, it is convenient for the inner blade and the drive seat to be installed and can achieve precise synchronous rotation on the same axis.

[0018] A further setting of the present invention: The inner blade and the drive member are in direct drive, and the inner blade and the drive member rotate synchronously.

[0019] With the above further settings, it is convenient for the inner blade and the drive member to be installed and can achieve precise synchronous rotation on the same axis.

[0020] A further setting of the present invention: The central axis around which the inner blade reciprocates is the same axis as the central axis around which the drive member reciprocates.

[0021] With the above further settings, this design makes the movement of the entire nose hair trimmer blade head more compact and efficient. The inner blade and the drive member reciprocate around the same central axis, which not only reduces the energy loss during the movement process, but also improves the trimming accuracy and stability. In addition, this coaxial design also helps to reduce the friction and wear between components, thereby extending the service life of the entire blade head. When the user is using it, a more smooth and stable trimming experience can be felt.

[0022] A further setting of the present invention: It further includes an oscillation bridge installed on the output shaft of the motor. The oscillation bridge has two output members, and the two output members are positioned at the same distance from the center of the motor output shaft. The drive member in the nose hair trimmer blade head has a pair of power transmission parts, and the pair of power transmission parts have drive grooves that are inserted in cooperation with the output members. The housing base has a through opening below the pair of drive grooves.

[0023] With the above further settings, a pair of power transmission parts of the transmission part can be accurately transmission - matched with a pair of output parts of the power system. Such a design ensures the balance and stability of the transmission part during reciprocating motion, reduces vibration and noise, and improves the user experience. At the same time, the through - holes provided by the housing base below the pair of power transmission parts provide space for the connection between the pair of power transmission parts and the pair of output parts of the power system.

[0024] A further setting of the present invention: The cutter head housing of the nose hair trimmer cutter head can be adapted to the reciprocating shaver body. The cutter head housing has a covering part for covering the upper end of the reciprocating shaver body, and a raised part. The covering part also covers the housing base and the transmission part. The inside of the raised part has a channel adapted to the outer cutter and for the inner cutter and the outer cutter to extend out, and the outer cutter is also connected and positioned with the raised part. The outer peripheral surface of the raised part is a conical structure.

[0025] With the above further settings, the covering part can not only cover the housing base and the transmission part, playing a protective role, but also enhance the integrity and aesthetics of the nose hair trimmer cutter head and the reciprocating shaver body. The raised part is used to protect the columnar inner cutter and outer cutter, and the channel on it provides space for the inner cutter and the outer cutter to extend out, enabling the cutter head to perform the trimming work smoothly; the design of the raised part with a conical outer peripheral surface is convenient for users to more easily remove the attached hair and debris during cleaning in actual use. Brief Description of the Drawings

[0026] Figure 1 It is a structural diagram of assembling the nose hair trimmer cutter head according to a specific embodiment of the present invention; Figure 2 It is a structural diagram of the power system according to a specific embodiment of the present invention; Figure 3 It is a structural diagram of the nose hair trimmer cutter head according to a specific embodiment of the present invention; Figure 4 It is the first structural diagram of the nose hair trimmer cutter head according to a specific embodiment of the present invention, in which the inner cutter and the transmission part are directly driven; Figure 5 It is the first exploded view of the cutter head according to a specific embodiment of the present invention; Figure 6 It is the second internal structural diagram of the nose hair trimmer cutter head according to a specific embodiment of the present invention, in which the swing arm and the two transmission parts both adopt the transmission mode of cooperation between the transmission shaft and the transmission groove; Figure 7 It is the second structural diagram of the nose hair trimmer cutter head according to a specific embodiment of the present invention; Figure 8 It is the second exploded view of the nose hair trimmer cutter head according to a specific embodiment of the present invention; Figure 9Assembly drawing of the second inner blade and the eccentric drive part of the nose hair trimmer blade head in the specific embodiment of the present invention; Figure 10 Structural diagram of the second blade drive swing arm of the nose hair trimmer blade head in the specific embodiment of the present invention; Figure 11 Structural diagram of the blade head housing of the nose hair trimmer blade head in the specific embodiment of the present invention; Figure 12 Structural diagram of the third blade head of the nose hair trimmer blade head in the specific embodiment of the present invention, in which the swing arm and the two drive parts both adopt a gear meshing drive mode; Figure 13 Internal structural diagram of the third blade head of the nose hair trimmer blade head in the specific embodiment of the present invention; Figure 14 Structural diagram of the fourth blade head of the nose hair trimmer blade head in the specific embodiment of the present invention, in which the drive swing arm and the eccentric drive part adopt a gear meshing drive mode, and the drive part adopts a drive shaft and a drive groove matching drive mode; Figure 15 Internal structural diagram of the fourth blade head of the nose hair trimmer blade head in the specific embodiment of the present invention.

[0027] Figure 16 Structural diagram of assembling the razor blade head in the specific embodiment of the present invention; Figure 17 Structural diagrams of two groups of moving blades of the razor blade head in the specific embodiment of the present invention.

[0028] In the figure: reciprocating razor body A, output part A1, motor output shaft A2, oscillation bridge A3; Razor blade head B, knife net B1, moving blade B2, blade head housing B3, knife rest B4, drive groove B41; Nose hair trimmer blade head B', blade head assembly B1', inner blade B11', outer blade B12', transmission part B2', blade head housing B3', covering part B31', raised part B32', channel B321', housing base B4', through port B41', power transmission part B21', drive groove B211', drive swing arm B5', eccentric drive part B22', drive part B111', drive shaft A B61', drive groove A B62', drive groove AB62', drive shaft B B63', drive groove B B64', drive seat B7', plug B8', hook B322', annular card slot B121'. Detailed implementation manners

[0029] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-17 As shown, a reciprocating hair trimmer of the present invention comprises a reciprocating shaver body A and a shaver head B or a nose hair trimmer head B' that can be adapted to the body, wherein the reciprocating shaver body A has a power system for driving at least one output member A1 to rotate, and the output member A1 is arranged offset from the center of the motor output shaft A2 in the power system, wherein the shaver head B comprises a blade net B1, a movable blade B2 and a blade head shell B3, wherein the movable blade B2 is transmission-connected to the output member A1, and the movable blade B2 is driven by the output member A1 to reciprocate linearly relative to the blade net B1 to cut beard; wherein the nose hair trimmer head B' comprises a blade head assembly B1', a transmission member B2', and a blade head shell B3' and a shell seat B4', the blade assembly B1' comprises an inner blade B11' and an outer blade B12', the inner blade 11 and the outer blade 12 are generally cylindrical, and have blade teeth distributed circumferentially at the end, and the distribution of the blade teeth is generally sparse, the inner blade B11' is transmission-connected with the transmission member B2', the center of the transmission member B2' is pivotally engaged with the shell seat B4', the transmission member B2' has a power transmission part B21' deviating from its center, the power transmission part B21' can receive the drive of the output member A1, thereby driving the transmission member B2' to rotate and swing back and forth around its central axis, the inner blade B11' is driven by the transmission member B2' to rotate and swing back and forth relative to the outer blade B12' to cut nose hair. Specifically, it also includes an oscillating bridge A3 installed on the motor output shaft A2, the oscillating bridge A3 has two output members A1, and the two output members A1 are positioned at the same distance from the center of the motor output shaft A2, the output member is a shaft, wherein the transmission member B2' in the nose hair trimmer head B' has a pair of power transmission parts B21', the pair of power transmission parts B21' has a driving groove B211' that is inserted and matched with the output member A1, and the shell seat B4' has a through opening B41' below the pair of driving grooves B211', of course, the output member can be a groove, and the power transmission part 21 is provided with a shaft member that matches the groove. The movable blade B2 in the shaver head B is provided with at least two groups and installed on respective blade holders B4, and the two blade holders B4 each have a pair of driving grooves B41 that are inserted and matched with the two output members A1; of course, the output member can be one.

[0031] Specifically, the cutter head housing B3' of the nose hair trimmer cutter head B' can be adapted to the reciprocating shaver body. The cutter head housing B3' has a covering portion B31' for covering the upper end of the reciprocating shaver body and a raised portion B32'. The covering portion B31' also covers the housing base B4' and the transmission member B2'. The inside of the raised portion B32' has a channel B321' adapted to the outer cutter and for the inner cutter and the outer cutter to extend out. The outer cutter B12' is also clamped and positioned with the inner side of the raised portion B32' or fixed by means of screws, etc. The outer peripheral surface of the raised portion is a conical structure that gradually narrows from the bottom to the upper end. The inner side of the raised portion has a hook B322', and an annular groove B121' cooperating with the hook is provided on the outer periphery of the outer cutter 12. The cutter head housing B3' and the housing base B4' can be integrally or separately provided.

[0032] When the inner cutter B11' and the transmission member B2' are directly driven, the inner cutter B11' and the transmission member B2' are sleeved and matched, and the synchronous rotation of the two is achieved by inserting a pin B8', or connected by a buckle or screws. First, the sleeved fit provides a preliminary and stable connection basis between the inner cutter and the transmission member. Subsequently, the addition of the pin further enhances the stability of this connection. In addition, the user can easily disassemble the pin for disassembling and assembling the inner cutter. Or the inner cutter and the center of the transmission member are integrally fixed. The central axis around which the inner cutter reciprocates is the same axis as the central axis around which the transmission member reciprocates. When in use, the nose hair trimmer cutter head of this product is assembled on the body of the reciprocating shaver. When the motor of the power system of the reciprocating shaver starts, it drives the output member to start rotating. The output member is in transmission cooperation with the power transmission portion on the transmission member, thereby driving the transmission member to make a rotary reciprocating swing around its center. Then it drives the inner cutter to make a synchronous rotary reciprocating swing, and it performs a shearing action relative to the stationary or relatively stationary outer cutter, effectively trimming the nose hair.

[0033] When the inner knife B11' and the transmission member B2' are indirectly driven, the swing amplitude of the reciprocating motion of the inner knife B11' is greater than the swing amplitude of the reciprocating motion of the transmission member B2'. A transmission swing arm B5' is provided between the transmission member B2' and the inner knife B11'. The transmission swing arm B5' is pivotally engaged on the housing seat B4'. One end of the transmission swing arm B5' is in transmission connection with the eccentric transmission part B22' on the transmission member B2', and the other end is in transmission connection with the driving part B111' deviating from the center of the inner knife B11'. The driving part B111' rotates synchronously with the inner knife B11'. The eccentric transmission part is offset from the center of the transmission member and is fixedly 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 driving part B111'. The transmission modes of the transmission swing arm B5' with the eccentric transmission part B22' and the driving part B111' adopt gear meshing transmission, or the cooperation of a transmission shaft and a transmission groove. Specifically, the eccentric transmission part B22' has a transmission shaft A B61' or a transmission groove A B62'. The transmission swing arm B5' has a corresponding transmission groove A B62' or a transmission shaft A B61' deviating from its swing center. The transmission shaft A B61' is inserted into the transmission groove A B62' to realize the transmission connection between the transmission member B2' and the transmission swing arm B5'. The driving part B111' has a transmission shaft BB63' or a transmission groove B B64'. The transmission swing arm B5' has a corresponding transmission groove B B64' or a transmission shaft B B63' deviating from its swing center. 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', thereby driving the inner knife B11'. When the transmission member swings, the transmission swing arm is driven to swing through the cooperation of the transmission groove A or the transmission shaft A, and then the power is transmitted to the inner knife through the cooperation of the transmission groove B or the transmission shaft B. Of course, the transmission swing arm can also be in gear meshing transmission with both the eccentric transmission part and the driving part. The meshing outer edges of the eccentric transmission part, the transmission swing arm and the driving part have teeth. The gear can be a cylindrical gear or a gear in the shape of an arc; or it can be in gear meshing transmission with one of them and in the cooperation of a transmission shaft and a transmission groove with the other. The central axis around which the inner knife reciprocates is the same axis as the central axis around which the transmission member reciprocates. Of course, they can also be non-coaxial. Specifically, a driving seat B7' is provided on the inner knife B11'. The inner knife B11' and the driving seat B7' are also synchronously rotated by inserting a pin B8', or connected by a buckle or a screw. The driving part B111' is integrally provided on the driving seat B7'; or the inner knife is directly fixed or integrally provided with the driving seat B7'.The housing base B4' is provided with a main shaft B41'. The transmission member B2' is pivotally sleeved outside the main shaft B41'. The driving seat B7' sleeved at the lower end of the inner blade B11' is rotatably connected to the center of the main shaft B41' through a support shaft B9'. The center of the main shaft B41' has a shaft cavity for the support shaft B9' to insert. The housing base B4' is provided with a support shaft B42' offset from the main shaft B41'. The transmission swing arm is pivotally connected to the housing base B4' through the support shaft B42'. During use, the nose hair trimmer head of this product is assembled on the body of a reciprocating shaver. When the power system of the reciprocating shaver is started, the output member starts to rotate. The output member is in transmission cooperation with the power transmission part on the transmission member, thereby driving the transmission member to make a reciprocating swing around its center. Then, through the transmission connection between the transmission swing arm, the eccentric transmission part and the driving part, the inner blade makes a reciprocating swing. During the reciprocating swing of the inner blade, a shearing action is performed relative to the stationary or relatively stationary outer blade, effectively trimming the nose hair.

[0034] The design of this trimmer takes into account both the functions of shaving and nose hair trimming. By replacing different heads, the function conversion can be achieved, which is convenient and practical, meeting the diverse needs of users.

[0035] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back...) are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indication will also change accordingly.

[0036] In addition, in the present invention, descriptions such as "first", "second", "I", "II", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. A reciprocating hair trimmer, characterized in that: The invention comprises a reciprocating shaver body (A) and a shaver head (B) or a nose hair trimmer head (B') that can be adapted to the body, wherein the reciprocating shaver body (A) has a power system for driving at least one output member (A1) to rotate, wherein the output member (A1) is arranged offset from the center of a motor output shaft (A2) in the power system, wherein the shaver head (B) comprises a blade net (B1), a movable blade (B2) and a blade head housing (B3), wherein the movable blade (B2) is connected to the output member (A1) in a transmission manner, and the movable blade (B2) is driven by the output member (A1) to reciprocate linearly relative to the blade net (B1) to cut beard; wherein the nose hair trimmer head (B') comprises a blade head assembly (B1'), a transmission member (B2), and a blade head housing (B3). (B2'), a blade shell (B3') and a shell seat (B4'), the blade assembly (B1') comprising an inner blade (B11') and an outer blade (B12'), the inner blade (B11') being in transmission connection with the transmission member (B2'), the center of the transmission member (B2') being pivotally engaged with the shell seat (B4'), the transmission member (B2') having a power transmission part (B21') offset from its center, the power transmission part (B21') being capable of receiving a drive from the output member (A1), thereby driving the transmission member (B2') to rotate and reciprocate around its central axis, the inner blade (B11') being driven by the transmission member (B2') to rotate and reciprocate relative to the outer blade (B12') to shear nose hair.

2. The reciprocating hair trimmer according to claim 1, characterized in that: The inner knife (B11') and the transmission member (B2') are indirectly transmitted, wherein the swing amplitude of the reciprocating motion of the inner knife (B11') is greater than the swing amplitude of the reciprocating motion of the transmission member (B2').

3. The reciprocating hair trimmer according to claim 2, characterized in that: A transmission swing arm (B5') is arranged between the transmission member (B2') and the inner knife (B11'). The transmission swing arm (B5') is pivotally engaged with the housing seat (B4'). One end of the transmission swing arm (B5') is transmission-connected to an eccentric transmission part (B22') on the transmission member (B2'), and the other end is transmission-connected to a driving part (B111') deviating from the center of the inner knife (B11'). The driving part (B111') rotates synchronously with the inner knife (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 according to claim 3, characterized in that: The transmission swing arm (B5'), the eccentric transmission part (B22') and the driving part (B111') are driven by gear meshing transmission or by transmission shaft and transmission groove matching transmission.

5. The reciprocating hair trimmer according to claim 4, characterized in that: The eccentric transmission part (B22') has a transmission shaft A (B61') or a transmission groove A (B62'); the transmission swing arm (B5') has a corresponding transmission groove A (B62') or a transmission shaft A (B61') deviating from its swing center; the transmission shaft A (B61') is inserted into the transmission groove A (B62') to realize the transmission connection between the transmission member (B2') and the transmission swing arm (B5'); the driving part (B111') has a transmission shaft B (B63') or a transmission groove B (B64'); the transmission swing arm (B5') has a corresponding transmission groove B (B64') or a transmission shaft B (B63') deviating from its swing center; 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 according to claim 5, characterized in that: A driving seat (B7') is provided on the inner knife (B11'); the inner knife (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 according to claim 1, characterized in that: The inner knife (B11') and the transmission member (B2') are directly driven, and the inner knife (B11') and the transmission member (B2') rotate synchronously.

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

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

10. The reciprocating hair trimmer according to any one of claims 1 to 7, characterized in that: The blade head shell (B3') of the nose hair trimmer blade head (B') can be adapted to a reciprocating shaver body, and the blade head shell (B3') comprises a covering portion (B31') for covering the upper end of the reciprocating shaver body, and a raised portion (B32'), wherein the covering portion (B31') also covers a housing seat (B4') and a transmission member (B2'), wherein the raised portion (B32') has a channel (B321') adapted to an outer blade and for allowing the inner blade and the outer blade to extend, and the outer blade (B12') is also connected to the raised portion (B32') for positioning, and the outer peripheral surface of the raised portion (B32') is a conical structure.

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