Electric shaver

Abstract

An electric shaver, comprising a main housing (20), a shaver head assembly (30), a motor (40), and a shaver sealing structure (10). The main housing is provided with an opening (21), the motor is mounted in the main housing, and the shaver sealing structure is sealingly fixed at the opening. The shaver sealing structure comprises a transmission assembly (300) and a sealing member (100). The transmission assembly comprises a base (310) and a transmission rod (320). The base is configured to be connected to an output end (41) of the motor, the transmission rod is configured to be connected to the shaver head assembly, and the base drives the transmission rod to move. The sealing member is sealingly connected to the main housing and covers the opening. The transmission rod passes through the sealing member, and the sealing member deforms with the movement of the transmission rod. The sealing member is an annular corrugated structure, and seals the transmission rod when the transmission rod performs reciprocating motion. By configuring the sealing member as an annular corrugated structure, a sufficient deformation space is provided for the movement of the transmission rod, prolonging the service life of the sealing member, thereby ensuring reliable and effective sealing at a transmission shaft of the shaver.

Description

An electric shaver

[0001] Cross reference to related applications

[0002] The present application is based on Chinese patent application No. 2024113408652, filed on September 24, 2024; Chinese patent application No. 2024113428764, filed on September 24, 2024; and Chinese patent application No. 2024113386066, filed on September 24, 2024, and claims priority to the aforementioned Chinese patent applications, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to shaver technology, in particular to an electric shaver. BACKGROUND

[0004] With the increasing improvement of living standards, more and more men tend to choose to use an electric shaver to trim beard. The electric shaver drives the moving blade to rotate or reciprocate linearly relative to the static blade by an electric motor to achieve hair cutting. Currently, the electric shaver is usually washable or used in a water scene, so the waterproof performance of the electric motor of the electric shaver is required to be high. Currently, only a sealing sheet is arranged outside the transmission shaft of the electric motor to realize the sealing of the transmission shaft. Since the electric motor will vibrate during use, over time, the sealing fit between the transmission shaft and the sealing sheet will not be tight, thereby causing the sealing sheet to fatigue and fail, thereby affecting the sealing and waterproof effect of the transmission shaft.

[0005] The above content is only used to assist in understanding the technical solutions of the application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0006] To solve the related technical problems, the present application provides an electric shaver.

[0007] The present application provides an electric shaver, which comprises a main housing, a head assembly, an electric motor and a shaver sealing structure. The main housing has an opening. The electric motor is installed in the main housing. The shaver sealing structure is sealingly fixed at the opening. The shaver sealing structure comprises a transmission assembly and a sealing member. The transmission assembly comprises a base and a transmission rod. The base is connected to the output end of the electric motor. The transmission rod is connected to the head assembly. The base drives the transmission rod to move. The sealing member is sealingly connected to the main housing and covers the opening. The transmission rod penetrates the sealing member. The sealing member deforms with the movement of the transmission rod. The sealing member is an annular corrugated structure and seals the transmission rod when the transmission rod moves reciprocally.

[0008] In the embodiments of the present application, the sealing member is arranged in a ring-shaped pleated structure to provide sufficient deformation space for the movement of the transmission rod, and the distance gradually increases from the position where the two sides of the wave trough (or wave crest) are connected to the wave trough (or wave crest) to form a gap, facilitating deformation under the driving of the transmission rod. That is, the deformation of the sealing member does not only rely on the elastic modulus of the sealing member itself, thereby reducing the elastic imbalance and fatigue failure of the sealing member, increasing the service life of the sealing member, and ensuring reliable and effective sealing at the transmission shaft of the shaver.

[0009] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0011] FIG. 1 shows a structure schematic diagram of a shaver sealing structure according to a first embodiment of the present application;

[0012] FIG. 2 is a top view of the shaver sealing structure in FIG. 1;

[0013] FIG. 3 is a sectional view along line I-I in FIG. 2;

[0014] FIG. 4 is a partial enlarged view of A in FIG. 3;

[0015] FIG. 5 is a sectional view along line II-II in FIG. 2;

[0016] FIG. 6 is a sectional view of the shaver sealing structure in FIG. 1;

[0017] FIG. 7 is a structure schematic diagram of a sealing member and a sealing ring of the shaver sealing structure according to the first embodiment of the present application;

[0018] FIG. 8 is a sectional view of one angle of the structure in FIG. 7;

[0019] FIG. 9 is a structure schematic diagram of a transmission assembly and a pressing member according to the first embodiment of the present application;

[0020] FIG. 10 is a structure schematic diagram of an electric shaver according to some embodiments of the present application;

[0021] FIG. 11 is an exploded structure schematic diagram of the electric shaver according to the first embodiment;

[0022] FIG. 12 is an exploded structure schematic diagram of the electric shaver in FIG. 11 after removing the head assembly;

[0023] Fig. 13 is a sectional view of the electric shaver in the first embodiment;

[0024] Fig. 14 is an enlarged view of the portion B in Fig. 13;

[0025] Fig. 15 is a schematic view of the structure of the shaver head assembly in the second embodiment;

[0026] Fig. 16 is an exploded view of the structure in Fig. 15;

[0027] Fig. 17 is a sectional view of the shaver sealing structure and the motor assembly in the second embodiment of the present application;

[0028] Fig. 18 is a schematic view of the shaver sealing structure in the second embodiment of the present application;

[0029] Fig. 19 is a sectional view of the shaver sealing structure in Fig. 18 at an angle;

[0030] Fig. 20 is a plan view of the shaver sealing structure in Fig. 18;

[0031] Fig. 21 is a sectional view of Fig. 20 along the line III-III;

[0032] Fig. 22 is a sectional view of Fig. 20 along the line IV-IV;

[0033] Fig. 23 is an exploded view of the electric shaver in Fig. 18;

[0034] Fig. 24 is a sectional view of the electric shaver in Fig. 23 at an angle;

[0035] Fig. 25 is a schematic view of the electric shaver in Fig. 24 at another angle;

[0036] Fig. 26 is a schematic view of the structure of the electric shaver in the third embodiment of the present application with the shaver head assembly removed;

[0037] Fig. 27 is a schematic view of the assembly of the motor, the sealing assembly, the first transmission unit and the second transmission unit in Fig. 26;

[0038] Fig. 28 is an exploded view of the structure in Fig. 27;

[0039] Fig. 29 is a sectional view of the structure in Fig. 27 at an angle;

[0040] Fig. 30 is a schematic view of the assembly of the sealing assembly, the first transmission unit and the second transmission unit in the present application;

[0041] Fig. 31 is a bottom view of the structure in Fig. 30;

[0042] Fig. 32 is a sectional view of the structure in Fig. 30 at an angle;

[0043] Fig. 33 is a front view of the structure in Fig. 32;

[0044] Fig. 34 is an exploded view of the structure in Fig. 30;

[0045] Fig. 35 is a schematic view of the structure of a seal in a third embodiment of the application;

[0046] Fig. 36 is a schematic view of the structure of a second base in the third embodiment of the application;

[0047] Fig. 37 is a schematic view of the structure of a connecting seat in the third embodiment of the application;

[0048] Fig. 38 is a schematic view of the structure of a first base in the third embodiment of the application.

[0049] Explanation of reference signs: 10, razor sealing structure; 100, sealing piece; 300, transmission assembly; 310, base; 320, transmission rod; 900, plate body; 910, mounting plate; 911, via hole; 920, crimping plate; 20, main machine shell; 21, opening; 30, cutter head assembly; 40, motor; 41, output end; 42, first motor; 421, first output end; 43, second motor; 431, second output end; 110a, sealing through hole; 120a, sealing cylinder; 121a, end wall; 122a, third fixing hole; 130a, sealing part; 140a, connecting sheet; 150a, limiting ring; 200a, sealing ring; 311a, base plate; 312a, connecting column; 400a, pressing piece; 410a, pressing plate; 411a, second fixing hole; 420a, pressing ring; 500a, shaft sleeve; 510a, first fixing hole; 520a, first shaft sleeve; 521a, sleeve joint part; 522a, transmission rod part; 523a, shaft joint part; 530a, second shaft sleeve; 600a, fastener; 700a, metal insert; 710a, threaded hole; 800a, cover plate; 110b, shaft hole; 120b, cylinder body; 130b, embedded convex ring; 140b, sealing main body; 150b, connecting ring; 200b, sleeve; 210b, embedding part; 220b, limiting part; 311b, seat body; 312b, connecting part; 313b, embedding groove; 314b, embedding hole; 315b, limiting groove; 316b, limiting plane; 321b, first transmission rod; 3211b, rotation stopping part; 322b, second transmission rod; 400b, connecting piece; 410b, fitting part; 420b, first mounting part; 430b, second mounting part; 101c, sealing assembly; 110c, first sealing hole; 120c, second sealing hole; 130c, first inner cylinder wall; 140c, second inner cylinder wall; 150c, first sealing sleeve; 160c, second sealing sleeve; 170c, connecting bottom sheet; 200c, clamping piece; 301c, first transmission unit; 3011c, transmission unit assembly; 330c, first cladding layer; 340c, connecting seat; 350c, adapting part; 360c, mounting through hole; 321c, third transmission rod; 311c, first base; 3111c, first base seat; 3112c, connecting cylinder; 3113c, blocking part; 3114c, metal connecting piece; 370c, locking piece; 380c, sealing plug; 302c, second transmission unit; 312c, second base; 3121c, second base seat; 3122c, bottom plate; 3123c, counterweight plate; 3124c, column body; 322c, fourth transmission rod; 390c, second cladding layer; 9111c, first mounting hole; 9112c, second mounting hole. DETAILED DESCRIPTION

[0050] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application. In addition, the technical solutions of various embodiments can be combined with each other, but the combination of the technical solutions should be based on the fact that a person of ordinary skill in the art can realize the combination, and when the combination of the technical solutions appears contradictory or unachievable, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present application.

[0051] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0052] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B schemes.

[0053] The present application provides an electric shaver, please refer to FIG. 10 to FIG. 14, the electric shaver includes a main shell 20, a head assembly 30, a motor 40 and a shaver sealing structure 10, the main shell 20 has an opening 21, the motor 40 is installed in the main shell 20, the shaver sealing structure 10 is sealed and fixed at the opening 21;The transmission rod 320 of the shaver sealing structure 10 is connected with the head assembly 30, and the output end of the motor 40 is connected with the base 310 of the shaver sealing structure 10.

[0054] The shape of the main shell 20 can be selected and designed according to actual needs, which is not specifically limited herein. The razor sealing structure 10 is sealingly fixed at the opening 21 of the main shell 20 to ensure the waterproof performance of the entire electric shaver. The type of the cutter assembly 30 can be selected and designed according to actual needs, for example, the cutter assembly 30 can be a long hair cutter, a short hair cutter, etc. The number of the cutter assembly 30 can also be selected and designed according to actual needs, which is not specifically limited herein. The motor 40 can be a linear motor 40. The output end of the motor 40 is connected with the base 310 of the razor sealing structure 10 to drive the moving cutter of the cutter assembly 30 to reciprocate relative to the static cutter to achieve hair cutting.

[0055] The razor sealing structure 10 includes a transmission assembly 300 and a sealing member 100. The transmission assembly 300 includes a base 310 and a transmission rod 320. The base 310 is used to be connected with the output end of the motor 40, and the transmission rod 320 is used to be connected with the cutter assembly 30. The base 310 drives the transmission rod 320 to move. The sealing member 100 is sealingly connected with the main shell 20 and covers the opening 21. Specifically, the edge of the sealing member 100 is fixed with the main shell 20.

[0056] The transmission rod 320 penetrates the sealing member 100, and the sealing member 100 deforms and recovers deformation with the reciprocating movement of the transmission rod 320. Specifically, the transmission rod 320 can directly penetrate the sealing member 100, or other components connected with the transmission rod 320 can penetrate the sealing member 100, but in general, the sealing member 100 deforms with the movement of the transmission rod 320. The sealing member 100 is an annular corrugated structure and seals the transmission rod 320 while achieving the reciprocating movement of the transmission rod 320. Specifically, the sealing member 100 can be designed as a single-layer corrugation or a multi-layer corrugation, that is, in the thickness direction of the sealing member 100, the cross section of the sealing member 100 is generally wave-shaped and has wave crests and wave troughs. In the case of a single-layer corrugation, since the corrugation is annular, the cross section of the sealing member 100 has two wave troughs symmetric about the central axis of the sealing member 100. In the case of a multi-layer corrugation, the cross section of the sealing member 100 has multiple sets of wave crests and wave troughs, and since the corrugation is annular, the number of wave troughs is at least four and is symmetric two by two about the central axis of the sealing member 100. In this way, by setting the sealing member 100 as an annular corrugated structure, sufficient deformation space is provided for the movement of the transmission rod 320, and since the distance gradually increases from the position where the two sides of the wave trough (or wave crest) formed by the corrugation are connected to the wave trough (or wave crest), a gap is formed, which facilitates deformation under the driving of the transmission rod 320. That is, the deformation of the sealing member 100 does not only rely on the elastic modulus of the sealing member 100 itself, thereby reducing the elastic imbalance and fatigue failure of the sealing member 100, increasing the service life of the sealing member 100, and ensuring reliable and effective sealing at the transmission shaft of the razor.

[0057] It should be noted that the present application does not limit the specific number of transmission rods 320. In some embodiments (such as the second embodiment), the transmission rods 320 can be provided in multiple numbers and divided into first transmission rods 321b and second transmission rods 322b. In other embodiments (such as the third embodiment), the transmission rods 320 can be provided in multiple numbers and divided into third transmission rods 321c and fourth transmission rods 322c.

[0058] In addition, the present application also does not limit the number of motors 40. It can be understood that the number of output ends 41 of the motors 40 is at least equal to the number of the motors 40. In some embodiments (such as the third embodiment), the motors 40 are provided in multiple numbers, and each motor 40 is provided with one output end 41. For example, the multiple motors 40 can be divided into first motors 42 and second motors 43, the first motors 42 include first output ends 421, and the second motors 43 include second output ends 431.

[0059] In some embodiments, the razor seal structure 10 further includes a plate body 900, the plate body 900 includes a mounting plate 910 and a crimping plate 920, and the mounting plate 910 and the crimping plate 920 can be fixedly connected by screws, buckles or the like. The specific structure of the mounting plate 910 and the crimping plate 920 can be many, and here the specific structure is not limited. The mounting plate 910 and the crimping plate 920 can be used as the mounting seat of the entire razor seal structure 10, and then the modular installation of the razor seal structure 10 on the main shell 20 is more convenient.

[0060] Hereinafter, the present application provides several exemplary embodiments.

[0061] The first embodiment (Figs. 1-14) aims to solve the technical problem that the seal at the transmission shaft is prone to sealing failure after long-term use.

[0062] In the related art, a spring is sleeved at the center of the sealing sheet to press the sealing sheet and the transmission shaft. However, the long-term vibration of the transmission shaft still causes the spring to loosen, thereby causing the sealing failure at the transmission shaft.

[0063] In the first embodiment of the present application, please refer to FIG. 1 to FIG. 5, the razor sealing structure 10 comprises a sealing member 100, a transmission assembly 300 and a pressing member 400a: the sealing member 100 is provided with a sealing through hole 110a; the transmission assembly 300 comprises a base 310 and a transmission rod 320 connected with each other, the transmission rod 320 penetrates the sealing through hole 110a; the base 310 is used to connect with the output end of the motor 40, so that the transmission assembly 300 can reciprocate under the driving of the motor 40; the pressing member 400a is fixedly connected with the base 310, the periphery of the sealing through hole 110a is arranged between the pressing member 400a and the base 310, so that the pressing member 400a and the base 310 tightly press the periphery of the sealing through hole 110a.

[0064] In the present embodiment, the sealing member 100 can be made of flexible sealing materials such as rubber and silica gel. The specific structure of the sealing member 100 can be various, for example, the sealing member 100 can be a sealing sheet with a folded ring, or can be a structure with an overall wrinkle, as long as it can seal the transmission rod 320, and the specific structure of the sealing member 100 is not limited here. The number of the sealing through holes 110a can be designed according to the number of the cutter heads and the motor 40, for example, when the razor is single cutter head, the sealing through hole 110a is set to one, when the razor is multi-cutter head and double motor 40 is used, the sealing through hole 110a can be set to two.

[0065] The transmission assembly 300 and the pressing member 400a can be made of plastic, metal or other materials. The materials of the transmission assembly 300 and the pressing member 400a can be the same or different. Optionally, the transmission rod 320 is made of plastic, and / or the pressing member 400a is made of metal. The transmission rod 320 made of plastic can reduce the weight of the transmission assembly 300 and reduce the friction noise between the transmission rod 320 and the cutter head. The pressing member 400a can be made of stainless steel, aluminum alloy, carbon steel or other metal materials to ensure the structural strength of the pressing member 400a. The transmission assembly 300 is used to transmit the output shaft of the motor 40 and the cutter head. In order to ensure the structural strength, the base 310 and the transmission rod 320 are integrally formed. The base 310 and the output end (magnet fixing frame) of the motor 40 can be fixedly connected by screws. The sealing member 100 covers the top of the base 310, and the transmission rod 320 passes through the sealing hole 110a to connect with the cutter head. When the motor 40 works, it drives the transmission assembly 300 to move back and forth along the preset direction, so that the moving cutter of the cutter head reciprocates relative to the static cutter to realize cutting hair. The fixing connection between the pressing member 400a and the base 310 can be achieved in many ways, such as screwing, clamping, riveting, welding and the like. The fixing connection between the pressing member 400a and the base 310 is not limited. The structure of the pressing member 400a can also be various, such as sleeve, spring and the like.

[0066] It should be noted that the periphery of the sealing hole 110a can be tightly fitted with the transmission rod 320 to achieve sealing. At this time, only the transmission rod 320 passes through the sealing hole 110a, and the base 310 is located below the sealing member 100. The periphery of the sealing hole 110a can also be tightly fitted with the base 310 to achieve sealing. At this time, the transmission rod 320 and part of the base 310 extend out of the sealing hole 110a. Of course, the sealing member 100 can also be tightly fitted with the outer periphery of the transmission rod 320 and part of the base 310 to achieve sealing. At this time, the sealing member 100 has a sealing cylinder 120a fitted on the outer periphery of part of the base 310, the end wall 121a of the sealing cylinder 120a is provided with the sealing hole 110a, and only the transmission rod 320 passes through the sealing hole 110a. Optionally, the inner peripheral wall of the sealing hole 110a is tightly fitted with the outer peripheral surface of the transmission rod 320. In this way, the sealing reliability of the transmission rod 320 can be improved. By tightly gripping the outer periphery of the sealing hole 110a with the pressing member 400a, the sealing member 100 and the transmission assembly 300 can be tightly fitted.

[0067] The present application can ensure that the periphery of the sealing through hole 110a is tightly attached to the transmission rod 320 or the base 310 by tightly pressing the periphery of the sealing through hole 110a with the pressing member 400a. The pressing member 400a is fixedly connected with the base 310 which is connected with the output end of the motor 40, so that the pressing member 400a is fixed relative to the base 310, and the pressing member 400a will not be loosened due to long-term vibration of the motor 40. The periphery of the sealing through hole 110a can be tightly attached to the outer periphery of the transmission rod 320 or the base 310 at all times through the tight pressing of the pressing member 400a, so that fatigue failure of the sealing member 100 is effectively avoided, and reliable and effective sealing at the transmission shaft of the shaver is ensured.

[0068] In an embodiment, the pressing member 400a is detachably fixedly connected with the base 310. The pressing member 400a and the base 310 can be detachably fixedly connected through screws, buckles or the like. In this way, the connection between the two is stable and reliable, and the disassembly and assembly are more convenient. After the sealing member 100 or the pressing member 400a is worn, the sealing member 100 and the pressing member 400a can be separately disassembled and replaced, so that the maintenance cost is reduced.

[0069] In an embodiment, please refer to FIGS. 3 to 9, the sealing member 100 comprises a sealing cylinder 120a, and a sealing through hole 110a is formed in the middle of the sealing cylinder 120a; the base 310 comprises a base plate 311a and a connecting column 312a connecting the base plate 311a and the transmission rod 320; the base plate 311a is connected with the output end of the motor 40, the connecting column 312a is arranged in the sealing cylinder 120a, and the pressing member 400a tightly presses the sealing cylinder 120a and the connecting column 312a.

[0070] In the embodiment, the substrate 311a is used to connect with the output end of the motor 40, and specifically, the substrate 311a is fixed with the magnet mounting frame of the motor 40 through screws. It can be understood that the cross-sectional area of the connecting column 312a is greater than that of the transmission rod 320 and smaller than that of the substrate 311a. By tightly sleeving the sealing cylinder 120a on the periphery of the connecting column 312a and enabling the sealing cylinder 120a to overlap the end surface of the connecting column 312a, the compression member 400a tightly compresses the sealing cylinder 120a and the connecting column 312a. Compared with only sleeving the sealing member 100 on the outer periphery of the transmission rod 320, the contact sealing area of the sealing member 100 and the transmission assembly 300 can be increased, the sealing member 100 and the base 310 are tightly sealed in the radial direction of the sealing through hole 110a, the sealing dimension of the sealing member 100 and the base 310 is increased, and the sealing reliability of the sealing member 100 and the base 310 can be improved. By tightly compressing the sealing cylinder 120a and the connecting column 312a through the compression member 400a, since the compression member 400a is fixedly connected with the base 310, even if the motor 40 vibrates for a long time, the sealing cylinder 120a and the connecting column 312a will not be tightly detached, the sealing cylinder 120a can always be tightly sealed with the outer peripheral wall of the connecting column 312a, and the reliable sealing between the sealing member 100 and the base 310 can be ensured.

[0071] Further, as shown in FIGS. 3-8, the sealing member 100 further comprises a sealing portion 130a in the shape of an annular fold, one end of the sealing cylinder 120a away from the transmission rod 320 is connected to the sealing portion 130a, one end of the sealing cylinder 120a close to the transmission rod 320 has an end wall 121a, the end wall 121a is provided with the sealing through hole 110a; the cross-sectional area of the connecting column 312a is greater than that of the transmission rod 320; the compression member 400a comprises a compression plate 410a sleeved on the periphery of the transmission rod 320, and the end wall 121a is clamped between the compression plate 410a and the end surface of the connecting column 312a.

[0072] In the embodiment, the sealing part 130a is arranged to provide sufficient deformation space for the movement of the transmission rod 320. The sealing part 130a can be designed as a single-layered or multi-layered pleat, and the specific structure of the sealing part 130a can be designed according to actual requirements, which is not limited here. By arranging the sealing cylinder 120a with the end wall 121a and the sealing through hole 110a formed in the end wall 121a, the end wall 121a of the sealing cylinder 120a can be lapped on the end face of the connecting column 312a. Compared with the structure without the end wall 121a and with the sealing through hole 110a open, the sealing area can be increased, and the sealing between the sealing member 100 and the transmission rod 320, the peripheral wall of the connecting column 312a and the end wall 121a is tight, which can further improve the sealing reliability and the waterproof effect of the transmission shaft of the shaver.

[0073] Further, the pressing member 400a has a pressing ring 420a extending in the same direction as the sealing cylinder 120a, which is closely sleeved on the periphery of the sealing cylinder 120a to make the inner peripheral wall of the sealing cylinder 120a closely fit the connecting column 312a.

[0074] In the embodiment, the outer periphery of the sealing cylinder 120a is tightly clamped by the pressing ring 420a to ensure that the sealing cylinder 120a is uniformly stressed, so that the inner peripheral wall of the sealing cylinder 120a closely fits the connecting column 312a more reliably. By arranging the pressing ring 420a to press the periphery of the sealing cylinder 120a, the radial stress of the outer periphery of the sealing through hole 110a is more uniform, and the sealing between the sealing through hole 110a and the transmission rod 320 is more reliable. In addition, the pressing member 400a can simultaneously press the periphery of the sealing through hole 110a in the radial and axial directions, further improving the tightness between the sealing through hole 110a and the transmission rod 320, and achieving a higher level of waterproof effect.

[0075] Further, please refer to FIG. 2, FIG. 6, FIG. 7 and FIG. 9, the cross-sectional shape of the transmission rod 320 and the shape of the sealing through hole 110a are rounded rectangles. Due to the arrangement of the pressing member 400a to press the periphery and the end wall 121a of the sealing cylinder 120a, the reliable sealing between the inner peripheral wall of the sealing through hole 110a and the transmission rod 320 can be ensured, so that the cross section of the transmission rod 320 can be designed as a non-circular shape. The transmission rod 320 with a rounded rectangular cross section is more convenient to connect with the head, and can prevent the cover plate 800a and other structures sleeved on the periphery of the transmission rod 320 from rotating.

[0076] In an embodiment, as shown in FIGS. 3-6, the razor sealing structure 10 further comprises a sleeve 500a sleeved on the outer periphery of the transmission rod 320, and the compression member 400a is sleeved on the outer periphery of the transmission rod 320 and clamped between the sleeve 500a and the base 310. The sleeve 500a and the compression member 400a are two separate parts, and the sleeve 500a can be made of metal or plastic. The sleeve 500a can axially or radially press the compression member 400a in the sealing through hole 110a. The compression member 400a is clamped between the sleeve 500a and the base 310, the compression member 400a is pressed by the sleeve 500a, and the compression member 400a uniformly bears the force when it is pressed against the sealing member 100, thereby enabling the compression member 400a to uniformly and tightly press the periphery of the sealing through hole 110a, and further improving the sealing reliability of the transmission rod 320.

[0077] Further, the compression member 400a comprises a pressing plate 410a clamped between the sleeve 500a and the base 310, and the razor sealing structure 10 further comprises a fastener 600a. The sleeve 500a is provided with a first fixing hole 510a, the pressing plate 410a is provided with a second fixing hole 411a, and the sealing member 100 is provided with a third fixing hole 122a. The fastener 600a is connected to the base 310 through the first fixing hole 510a, the second fixing hole 411a, the third fixing hole 122a, to fixedly connect the sleeve 500a, the compression member 400a, and the base 310.

[0078] In this embodiment, the fastener 600a can be a screw, a rivet, or the like. The compression member 400a comprises the pressing plate 410a clamped between the sleeve 500a and the base 310, and the sleeve 500a, the pressing plate 410a, and the base 310 are connected in series through the fastener 600a, which simplifies the connection structure among the three and improves the disassembly and assembly convenience. In practice, the pressing plate 410a and the base 310 are clamped on the upper and lower sides of the sealing member 100, which makes the periphery of the sealing through hole 110a more closely and reliably fit the transmission shaft. The sleeve 500a above the pressing plate 410a makes the force on the pressing plate 410a more uniform, and the pressing plate 410a uniformly presses the sealing member 100, that is, the force on the sealing member 100 is more uniform, thereby improving the sealing reliability of the sealing member 100 to the transmission rod 320. The pressing plate 410a can be clamped between the sleeve 500a and the base 310 in the axial and / or radial direction of the sealing through hole 110a.

[0079] In an embodiment, as shown in FIG. 3 and FIG. 4, the fastener 600a is provided with at least two, and at least two fasteners 600a are arranged on opposite sides of the transmission rod 320, and each fastener 600a corresponds to a first fixing hole 510a, a second fixing hole 411a, and a third fixing hole 122a.

[0080] In the embodiment, the number of the first fixing hole 510a and the third fixing hole 122a is the same as the number of the second fixing hole 411a and the number of the fastener 600a, and they are arranged one by one. By arranging the fastener 600a on opposite sides of the transmission rod 320, the pressing plate 410a is fixed to the base 310 by the fastener 600a on opposite sides of the transmission rod 320, which can ensure that the stress on both sides of the pressing plate 410a is uniform, thereby improving the connection stability of the pressing plate 410a, and further ensuring the uniform and reliable sealing of the sealing element 100.

[0081] In an embodiment, please refer to FIG. 3 to FIG. 6 and FIG. 9, the razor sealing structure 10 further comprises a metal insert 700a, the metal insert 700a is fixedly embedded in the base 310, the metal insert 700a is provided with a threaded hole 710a, and the fastener 600a is sequentially threaded through the first fixing hole 510a, the second fixing hole 411a, and the threaded hole 710a for threaded connection.

[0082] In the embodiment, the threaded hole 710a is arranged on the metal insert 700a, so that the fastener 600a is threaded with the threaded hole 710a, and the metal insert 700a functions as a nut, which facilitates disassembly and makes the connection of the fastener 600a, the base 310, the pressing plate 410a, and the shaft sleeve 500a more reliable. By arranging the metal insert 700a, the connection strength can be guaranteed. Therefore, the transmission assembly 300 as a whole can be made of plastic material, so that the weight of the entire transmission assembly 300 can be reduced, and the transmission rod 320 can be made of plastic material, which can reduce the friction noise between the transmission rod 320 and the cutter head. The metal insert 700a can be made of carbon steel, stainless steel, etc.

[0083] In combination with the above embodiment in which the shaft sleeve 500a is provided with the first fixing hole 510a, further, as shown in FIG. 1 to FIG. 6, the razor sealing structure 10 further comprises a cover plate 800a, the cover plate 800a is fixedly connected to one end of the shaft sleeve 500a away from the pressing element 400a, and covers the first fixing hole 510a.

[0084] In the embodiment, the plate surface of the cover plate 800a and the pressing plate 410a is perpendicular to the transmission rod 320 in practice. The cover plate 800a can be made of metal, plastic or other materials. The cover plate 800a can be fixed on the shaft sleeve 500a by means of glue, double-sided adhesive tape or other adhesive means. By covering the first fixing hole 510a with the cover plate 800a, the first fixing hole 510a of the shaft sleeve 500a is prevented from being exposed, which can prevent hair from falling into the first fixing hole 510a and breeding bacteria, and can also play a decorative role and ensure the appearance consistency of the shaft sleeve 500a.

[0085] In another embodiment, the pressing member 400a is integrally formed with the shaft sleeve 500a. Compared with the above-mentioned solution in which the pressing member 400a and the shaft sleeve 500a are separately formed, the embodiment can reduce the number of parts and simplify the installation steps by integrally forming the pressing member 400a with the shaft sleeve 500a.

[0086] In an embodiment, referring to FIGS. 1-7, the sealing member 100 is provided with at least two sealing through holes 110a, the transmission assembly 300 and the pressing member 400a are provided with at least two transmission rods 320 corresponding to the sealing through holes 110a, and each pressing member 400a tightly presses the periphery of a sealing through hole 110a. When the sealing through hole 110a is provided with multiple sealing through holes 110a, a pressing member 400a is arranged at the periphery of each sealing through hole 110a, which can ensure the sealing reliability of each sealing through hole 110a.

[0087] Further, as shown in FIGS. 1-6, 9, 11-14, the razor sealing structure 10 includes a first shaft sleeve 520a and a second shaft sleeve 530a. The first shaft sleeve 520a includes a sleeve portion 521a, a transmission rod portion 522a, and a shaft connecting portion 523a connecting the sleeve portion 521a and the transmission rod portion 522a. The sleeve portion 521a is sleeved on one of the transmission rods 320, one of the pressing members 400a is at least partially clamped between the sleeve portion 521a and the base 310, and the transmission rod portion 522a extends in the same direction as the transmission rod 320. Another pressing member 400a is at least partially clamped between the second shaft sleeve 530a and the base 310.

[0088] In the embodiment, the transmission rod part 522a and the transmission rod 320 extend in the same direction and are used to connect with the cutter head assembly 30. The second shaft sleeve 530a mainly plays a role of pressing the compression fitting part 400a to uniformly press the sealing part 100. The first shaft sleeve 520a not only plays a role of uniformly pressing the compression fitting part 400a, but also has a function of shaft connection, so that the transmission rod 320 on the first shaft sleeve 520a can also be connected with the cutter head assembly 30. Therefore, the transmission assembly 300 connected with the first shaft sleeve 520a can drive two cutter head assemblies 30 to move synchronously, so that at least three cutter head assemblies 30 can be driven to move without increasing the number of motors 40.

[0089] Further, the sleeve part 521a extends along a first direction, the shaft connection part 523a extends along a second direction, and the two transmission rods 320 and the transmission rod part 522a are arranged side by side along the second direction, and the first direction, the second direction and the extension direction of the transmission rod 320 are perpendicular to each other. In the embodiment, the sleeve part 521a extends along the first direction, so the width of the sleeve part 521a in the first direction is greater than that in the second direction. In this way, the cross section of the sleeve part 521a and the second shaft sleeve 530a can be designed as an ellipse, a track, a waist, a rectangle, etc. Specifically, the two fasteners 600a are arranged on both sides of the sleeve part 521a in the first direction of the transmission rod 320, and the compression fitting part 400a is fixedly connected with the base 310. In this way, the two ends of the sleeve part 521a in the length direction (the first direction) are fixedly connected with the base 310 through a fastener 600a, which can ensure the stability and reliability of the connection between the first shaft sleeve 520a and the base 310. The fastener 600a can be a screw, a rivet, etc.

[0090] In an embodiment, as shown in FIGS. 1-6, 13 and 14, the sealing part 100 includes a sealing cylinder 120a, a connecting piece 140a and a sealing part 130a in the shape of an annular fold, the connecting piece 140a is connected to the outer edge of the sealing part 130a, the sealing cylinder 120a is connected to the inner edge of the sealing part 130a, the sealing cylinder 120a has an end wall 121a near one end of the transmission rod 320, and the end wall 121a is provided with a sealing through hole 110a; the razor sealing structure 10 further includes a mounting plate 910 and a compression plate 920, the mounting plate 910 and the compression plate 920 are provided with a through hole 911 for the sealing part 130a to pass through; and the connecting piece 140a is compressed between the mounting plate 910 and the compression plate 920.

[0091] In the embodiment, the sealing part 130a penetrates the mounting plate 910 and the crimping plate 920, so that the sealing part 130a in a pleated shape can provide sufficient deformation space for the movement of the transmission rod 320. The specific shape of the sealing part 130a can be designed according to actual needs, which is not limited here. The specific structure of the mounting plate 910 and the crimping plate 920 can be various, as long as they can crimp the connecting piece 140a, which is not limited here. The mounting plate 910 and the crimping plate 920 not only can clasp the mounting connecting piece 140a, but also can serve as the mounting seat of the entire razor sealing structure 10, which is more convenient for the overall modular installation on the main machine shell 20. The sealing part 130a is fixed by the connecting piece 140a around the outer periphery and the mounting plate 910 and the crimping plate 920, which can increase the fixing area of the sealing member 100 and the mounting plate, improve the connection stability while ensuring the sealing reliability. The connecting piece 140a is crimped between the mounting plate 910 and the crimping plate 920, which is more convenient for dismounting and mounting the sealing member 100.

[0092] Further, referring to FIGS. 3, 5, 8 and 14, the sealing member 100 further comprises a limiting ring 150aa corresponding to the outer periphery of the sealing part 130a, the limiting ring 150aa and the sealing part 130a are respectively connected to opposite sides of the connecting piece 140a; the outer peripheral walls of the sealing part 130a and the limiting ring 150aa respectively fit the inner walls of the through holes 911 of the mounting plate 910 and the crimping plate 920. In this way, the sealing member 100, the mounting plate 910 and the crimping plate 920 can be respectively pre-positioned by the sealing part 130a and the limiting ring 150aa when assembled; at the same time, the outer peripheral walls of the sealing part 130a and the limiting ring 150aa respectively fit the inner walls of the through holes 911 of the mounting plate 910 and the crimping plate 920, which can also limit the displacement of the entire sealing member 100 relative to the mounting plate 910 and the crimping plate 920 in the radial direction, improve the assembly precision between the three, and avoid displacement leading to sealing failure.

[0093] In an embodiment, as shown in FIGS. 3, 5 to 8, 13 and 14, the razor sealing structure 10 further comprises a sealing ring 200a connected to the connecting piece 140a, the sealing ring 200a is fixed to the side of the crimping plate 920 away from the transmission rod 320, for sealing the crimping plate 920 and the main machine shell 20.

[0094] In the embodiment, the sealing ring 200a and the connecting plate 140a can be connected by a plurality of sealing posts. Optionally, one sealing post is arranged at each of the four corners of the connecting plate 140a to connect the sealing ring 200a and the connecting plate 140a. By connecting the sealing ring 200a and the connecting plate 140a, the sealing ring 200a and the sealing member 100 are connected as a whole, which is more convenient for overall assembly. In order to reduce the cost, the sealing ring 200a and the sealing member 100 can also be formed by one-time molding. It can be understood that the crimping plate 920 is used to form a mounting seat of the entire shaving razor transmission shaft assembly. By fixing the sealing ring 200a to the side of the crimping plate 920 away from the transmission rod 320, the sealing ring 200a is clamped between the crimping plate 920 and the main machine shell 20 when the shaving razor transmission shaft assembly is mounted to the main machine shell 20, so as to realize the sealing and waterproof of the two.

[0095] A second embodiment (Figs. 15-25) provides a hair cutter.

[0096] Common hair cutters include reciprocating razors, hair trimmers, etc. The current reciprocating hair cutter drives the transmission shaft to reciprocate through the motor, and then drives the blade to move to achieve cutting. In order to ensure the sealing effect, a sealing ring is usually arranged on the periphery of the transmission shaft, and the output end of the motor can drive the transmission shaft to reciprocate through the folds of the sealing ring. However, the current transmission shaft is usually directly embedded in the fixed seat connected with the output end of the motor. During the working process of the reciprocating hair cutter, the vibration of the motor will be transmitted to the connection between the two, so that the connection between the transmission shaft and the fixed seat is easy to loosen, the service life of the sealing ring is short, and then the waterproof sealing performance of the connection between the two will be affected.

[0097] In view of the above problems, the second embodiment of the present application is provided to solve the technical problem that the connection between the transmission shaft and the fixed seat of the hair cutter is easy to loosen. Please refer to Figs. 10, 15 to 25, the hair cutter includes a transmission rod sealing structure and a motor 40. Specifically, the hair cutter can be an electric razor, and the transmission rod sealing structure can be a razor sealing structure 10.

[0098] The razor sealing structure 10 comprises a plate body 900, a sealing member 100, a base 310, a sleeve 200b and a first transmission rod 321b: the main housing 20 has a mounting cavity and an opening 21 communicating with the mounting cavity; the motor 40 is arranged in the mounting cavity, and the razor sealing structure 10 is fixedly connected to the main housing 20, specifically, the plate body 900 covers the opening 21, and the sealing member 100 is provided with a shaft hole 110b; the base 310 comprises a seat body 311b and a connecting portion 312b connected to each other, the connecting portion 312b penetrates through the shaft hole 110b and is fixedly connected to the sealing member 100 in close contact, the seat body 311b is connected to the output end 410 of the motor 40 and can reciprocate under the driving of the motor 40; the sleeve 200b is fixedly embedded in the connecting portion 312b, and the hardness of the sleeve 200b is greater than that of the connecting portion 312b; and the first transmission rod 321b is fixedly installed in the sleeve 200b.

[0099] In the embodiment, the motor 40 specifically comprises a stator assembly and a rotor assembly, the rotor assembly comprises a permanent magnet and a connecting seat, the permanent magnet is fixed on the connecting seat, and the connecting seat forms the output end 410. The stator assembly comprises an iron core, a bobbin and a coil, the coil is wound on the bobbin and is installed on the iron core through the bobbin. The iron core can be a U-shaped iron core, an E-shaped iron core or the like, and different types of iron cores can be selected according to actual needs, which are not specifically limited here. After the coil passes through the alternating current, the stator assembly forms an electromagnet, and through the magnetic induction action of the electromagnet and the permanent magnet of the rotor assembly, the rotor assembly is driven to reciprocate along the preset direction. Specifically, the seat body 311b is fixedly connected to the connecting seat of the stator assembly by a screw. By connecting the first transmission rod 321b with the cutter head assembly 30, the motor 40 can drive the moving cutter of the cutter head assembly 30 to reciprocate relative to the static cutter quickly to realize cutting hair.

[0100] The main housing 20 provides installation and protection for the internal structure of the entire hair cutter, and the structure and form thereof can be various, which are not specifically limited here. Generally, the opening 21 is arranged on the top wall of the main housing 20. The sealing member 100 is usually made of flexible sealing materials such as silica gel and rubber. Specifically, the sealing member 100 is arranged in a structure of multiple folds or a skirt, that is, the sealing member 100 can deform horizontally and vertically, so that the sealing member 100 can seal the first transmission rod 321b without affecting the reciprocating swing of the first transmission rod 321b.

[0101] The sealing member 100 and the main shell 20 can be fixedly connected in a press-fit, embedded, adhesive, injection molding connection and the like. Specifically, the main shell 20 includes a shell body and a plate body 900, the upper end of the shell body is open, and a mounting cavity is formed in the shell body; the plate body 900 covers the open end of the shell body, the plate body 900 includes a mounting plate 910 and a press-fit plate 920 connected to each other, the mounting plate 910 and the press-fit plate 920 are provided with a communicating opening 21, the sealing member 100 is arranged at the opening 21, and the peripheral edge of the sealing member 100 is press-fitted between the mounting plate 910 and the press-fit plate 920. In this way, the connection between the sealing member 100 and the main shell 20 is more stable and reliable, and the sealing member 100 is convenient to disassemble and replace relative to the main shell 20.

[0102] The seat body 311b of the base 310 and the output end 410 of the motor 40 can be fixedly connected by screws. The connecting portion 312b of the base 310 is specifically cylindrical, and the connecting portion 312b is adapted to be embedded in the shaft hole 110b of the sealing member 100. The inner diameter of the shaft hole 110b can be slightly smaller than or equal to the outer diameter of the connecting portion 312b to ensure that the sealing member 100 and the connecting portion 312b are tightly fitted. The sealing member 100 and the connecting portion 312b can be tightly fitted and fixed by injection molding connection, clamping ring clamping and the like. It can be understood that, in order to ensure the structural strength, the first transmission rod 321b is usually made of metal material, if the sealing member 100 directly contacts the first transmission rod 321b, since the first transmission rod 321b needs to reciprocate for a long time, the friction frequency between the two is high, and the sealing between the two is more likely to fail after a long time of use. The base 310 is usually made of plastic material. In this way, the connecting portion 312b and the wall of the shaft hole 110b of the sealing member 100 are tightly fitted and fixed, which can ensure the waterproof effect of the connection between the base 310 and the sealing member 100, avoid the sealing member 100 directly contacting the first transmission rod 321b, reduce the friction frequency of the sealing member 100, and the connecting portion 312b has a larger outer diameter than the first transmission rod 321b, so that the sealing fit area can be increased to improve the service life and sealing effect of the sealing member 100.

[0103] The hardness of the sleeve 200b is greater than the hardness of the connecting portion 312b, specifically, the sleeve 200b is made of metal material, and the base 310 is made of plastic material. The sleeve 200b can be fixedly embedded in the connecting portion 312b by injection molding connection, interference fitting and the like. The first transmission rod 321b and the sleeve 200b can be fixedly connected by welding. In this way, the first transmission rod 321b and the connecting portion 312b are connected conveniently and reliably.

[0104] The sealing structure of the first transmission rod 321b comprises the base 310 connected with the output end 410 of the motor 40, the connecting part 312b penetrating the shaft hole 110b of the sealing element 100 and being fixedly connected with the sealing element 100, and the sleeve 200b with greater hardness fixed in the connecting part 312b, so that the first transmission rod 321b is fixedly installed in the sleeve 200b. In this way, the first transmission rod 321b can be prevented from directly contacting the sealing element 100, the friction frequency is reduced, the outer diameter of the connecting part 312b is greater than that of the first transmission rod 321b, the sealing area is increased, the service life and the sealing effect of the sealing element 100 are improved, the first transmission rod 321b is fixedly connected with the sleeve 200b with greater hardness, the connection stability of the first transmission rod 321b and the connecting part 312b is ensured, the loosening of the connection caused by the vibration transmission of the motor 40 is avoided, the service life of the sealing element 100 is further improved, and the waterproof sealing effect of the connection is ensured.

[0105] In an embodiment, referring to FIGS. 17-25, the sealing element 100 has a barrel 120b extending along the axial direction of the first transmission rod 321b, the barrel 120b has a shaft hole 110b formed in the middle part thereof, and the connecting part 312b is fitted into the barrel 120b. Since the first transmission rod 321b needs to reciprocate and has a large movement stroke, the sealing element 100 is usually large in size. If the sealing element 100 is only matched with the connecting part 312b through the shaft hole 110b with the same thickness, the sealing area is small, and the sealing effect cannot be ensured. The barrel 120b is arranged to increase the sealing area of the sealing element 100 and the connecting part 312b, thereby improving the sealing reliability.

[0106] Further, as shown in FIGS. 19-25, the inner circumferential wall of the barrel 120b is provided with an embedded convex ring 130b, and the outer circumferential wall of the connecting part 312b is provided with an embedded recess 313b matched with the embedded convex ring 130b. The cooperation of the embedded convex ring 130b and the embedded recess 313b can effectively prevent the barrel 120b and the connecting part 312b from being loosened in the axial direction, thereby further ensuring the sealing reliability of the two. The embedded convex ring 130b can be one or more. When the embedded convex ring 130b is more than one, the plurality of embedded convex rings 130b are arranged at intervals in the axial direction of the barrel 120b, and the outer circumferential wall of the connecting part 312b is provided with a plurality of embedded recesses 313b matched therewith. In this way, the sealing reliability of the two can be further improved.

[0107] Further, the sealing element 100 further comprises a sealing body 140b and a connecting ring 150b connected to the outer circumferential wall of the sealing body 140b, the sealing body 140b is connected to the outer wall of the barrel 120b, and the connecting ring 150b is fixedly connected to the plate body 900 and is sealingly fixed to the main machine shell 20 through the plate body 900.

[0108] In the embodiment, the connecting ring 150b can be fixedly connected to the plate body 900 by crimping, embedding, bonding or the like. By connecting the connecting ring 150b and the plate body 900, the connection is reliable and convenient, and the deformation amount of the sealing main body 140b is not affected.

[0109] In combination with the above embodiment in which the inner peripheral wall of the sealing cylinder is provided with the embedded convex ring 130b, further, the sealing main body 140b is connected to the position of the cylinder body 120b corresponding to the embedded convex ring 130b. In this way, the thickness of the connection between the sealing main body 140b and the cylinder body 120b can be increased, and the structural strength of the connection between the sealing main body 140b and the cylinder body 120b can be increased, thereby avoiding rupture due to long-term movement.

[0110] Further, referring again to FIGS. 21 and 22, both ends of the cylinder body 120b extend beyond the sealing main body 140b. In this way, the length of the cylinder body 120b can be further increased, so that the cylinder body 120b and the connecting portion 312b have sufficient sealing fitting area, thereby ensuring the sealing effect of both. At the same time, both ends of the cylinder body 120b extend beyond the sealing main body 140b, that is, the sealing main body 140b is connected at the middle position in the length direction of the connecting cylinder, so that the deformation of the upper and lower sides of the sealing main body 140b is more uniform.

[0111] In an embodiment, as shown in FIGS. 21 and 22, the extension length of the sleeve 200b is greater than the extension length of the cylinder body 120b. In this way, the connection fitting area of the sleeve 200b and the first transmission rod 321b can be increased, and the connection stability of the first transmission rod 321b and the sleeve 200b can be further improved.

[0112] Specifically, as shown in FIGS. 19 to 25, the connecting portion 312b is provided with an embedded hole 314b, and the sleeve 200b is embedded in the embedded hole 314b. In this way, the assembly convenience of both can be improved.

[0113] Further, referring to FIGS. 19, 21 and 23, the sleeve 200b further includes a limiting groove 315b in communication with the embedded hole 314b, and the sleeve 200b includes an embedded portion 210b and a limiting portion 220b connected to each other, the embedded portion 210b is embedded in the embedded hole 314b, and the limiting portion 220b is limitingly installed in the limiting groove 315b in the axial direction of the first transmission rod 321b and in the circumferential direction of the first transmission rod 321b.

[0114] In the embodiment, the cooperation of the limiting portion 220b and the limiting groove 315b can avoid rotation and axial movement of the sleeve 200b relative to the base 310, thereby preventing the first transmission rod 321b from rotating and causing the tool bit to shake and affect the cutting efficiency, so as to ensure the use effect of the product. The structure of the limiting portion 220b and the limiting groove 315b can be various, as long as the cross-sectional shape of the limiting groove is non-circular, and the limiting portion 220b is embedded in the limiting groove 315b to achieve circumferential limiting and avoid relative rotation and axial movement. Specifically, the cross-section of the limiting portion 220b can be oval, track-shaped, or rounded rectangular.

[0115] Further, referring to FIGS. 23-25, the two ends of the embedding hole 314b are respectively provided with a limiting groove 315b, and the inner peripheral wall of the limiting groove 315b is located outside the inner peripheral wall of the embedding hole 314b; the limiting portion 220b is fitted and installed in the limiting groove 315b. Specifically, the limiting groove 315b has a limiting plane 316b, and the cooperation of the limiting plane 316b and the limiting portion 220b can achieve circumferential limiting of the sleeve 200b and the connecting portion 312b. The inner peripheral wall of the limiting groove 315b is located outside the inner peripheral wall of the embedding hole 314b, so that when the limiting portion 220b is installed in the limiting groove 315b, it is overlapped above the hole wall of the embedding hole 314b, and the limiting portion 220b at both ends of the sleeve 200b cooperates with the limiting groove 315b to achieve axial limiting. In the embodiment, one limiting groove 315b is arranged at each end of the embedding hole 314b, so that both ends of the sleeve 200b are circumferentially limited by the connecting portion 312b, which improves the reliability of the circumferential limiting and also avoids the sleeve 200b and the connecting portion 312b from being loosened in the axial direction, thereby improving the connection reliability of the two.

[0116] In an embodiment, the sleeve 200b has a fixing hole, and the first transmission rod 321b is embedded in the fixing hole. The sleeve 200b and the first transmission rod 321b are both made of metal material, and the base 310 is made of plastic material.

[0117] In the embodiment, the sleeve 200b and the first transmission rod 321b can be made of metal material such as stainless steel. When the sleeve 200b and the first transmission rod 321b are both made of metal material, it is more convenient to fix the first transmission rod 321b and the sleeve 200b. The base 310 is made of plastic material, which is more easily shaped into a complex structure, and compared with metal material, the connecting portion 312b of the plastic material is more easily sealed with the sealing member 100.

[0118] Further, the sleeve 200b is welded with the first transmission rod 321b at a side close to the motor 40. Specifically, the sleeve 200b and the first transmission rod 321b can be welded by laser welding at a gap close to the motor 40. The welding of the sleeve 200b and the first transmission rod 321b can ensure the stability of the connection between the two, and the welding operation is convenient.

[0119] Further, the welding part of the sleeve 200b and the first transmission rod 321b is provided with sealing glue. By filling the sealing glue at the bottom of the connection part of the sleeve 200b and the first transmission rod 321b, the sealing effect can be further ensured.

[0120] In combination with the above-mentioned embodiments in which the sleeve 200b and the first transmission rod 321b are made of metal material, and the base 310 is made of plastic material, further, the sealing member 100 and the connecting part 312b are injection-molded; and / or, the sleeve 200b and the connecting part 312b are injection-molded.

[0121] The sleeve 200b and the connecting part 312b, and the sealing member 100 and the connecting part 312b can be connected by secondary injection molding. In practice, the sleeve 200b and the connecting part 312b are first injection-molded to form an assembly A, and then the assembly A and the sealing member 100 are secondarily injection-molded. Since the connection part of the first transmission rod 321b and the sealing member 100 is prone to loosening due to long-term vibration, by injection-molding the sleeve 200b and the connecting part 312b, and injection-molding the sealing member 100 and the connecting part 312b, the stability and reliability of the connection between the two can be ensured, thereby avoiding loosening and improving the sealing effect between the first transmission rod 321b and the sealing member 100.

[0122] In an embodiment, as shown in FIGS. 18-23, the hair cutter further comprises a connecting member 400b and at least one second transmission rod 322b, the connecting member 400b is arranged on the side of the sealing member 100 away from the base 311b and is fixedly connected with the first transmission rod 321b; the at least one second transmission rod 322b is arranged on the connecting member 400b and is arranged side by side with the first transmission rod 321b. The connecting member 400b is used to connect the first transmission rod 321b and the second transmission rod 322b, and the first transmission rod 321b and the second transmission rod 322b can be connected as a whole through the connecting member 400b. In this way, only one output end 410 of the motor 40 is needed to drive the plurality of second transmission rods 322b and the first transmission rod 321b to move reciprocatingly synchronously, which can meet the requirement of multi-knife cutting while effectively reducing the cost and realizing the miniaturization of the hair cutter.

[0123] In an embodiment, the second transmission rod 322b and the first transmission rod 321b are both connected with the connecting piece 400b by two-shot injection molding. The second transmission rod 322b and the first transmission rod 321b are made of metal materials such as stainless steel, and the connecting piece 400b is made of plastic material. By connecting the second transmission rod 322b and the first transmission rod 321b with the connecting piece 400b by two-shot injection molding, compared with other connection modes, the connection stability can be ensured, and the shaking of the first transmission rod 321b and the second transmission rod 322b is avoided to affect the cutting effect of the tool bit. In addition, after the second transmission rod 322b, the first transmission rod 321b and the connecting piece 400b are injection molded as a whole, the first transmission rod 321b only needs to be arranged in the sleeve 200b and welded with the sleeve 200b, and the assembly of the second transmission rod 322b and the base 310 can be realized, and the assembly efficiency can be effectively improved.

[0124] In an embodiment, referring to FIGS. 21, 23-25, the outer peripheral wall of the first transmission rod 321b is provided with a rotation stopping part 3211b, the connecting piece 400b is provided with a matching part 410b corresponding to the rotation stopping part 3211b, and the rotation stopping part 3211b is limited and matched with the matching part 410b in the circumferential direction of the first transmission rod 321b. By matching the rotation stopping part 3211b with the matching part 410b, the rotation of the first transmission rod 321b relative to the connecting piece 400b can be avoided, and the rotation of the second transmission rod 322b to affect the connection with the corresponding tool bit can be further avoided. The structure of the rotation stopping part 3211b and the matching part 410b can be various, as long as they can limit the rotation of the first transmission rod 321b relative to the connecting piece 400b around the axis after being matched, which is not limited here.

[0125] Further, the matching part 410b includes rotation stopping grooves opened in the top wall and the bottom wall of the connecting piece 400b, and the first transmission rod 321b is provided with two rotation stopping parts 3211b corresponding to the two rotation stopping grooves. Specifically, as long as the cross-sectional shape of the rotation stopping groove and the rotation stopping part 3211b is non-circular, the rotation stopping part 3211b can be embedded in the rotation stopping groove to achieve circumferential limiting and avoid relative rotation. Specifically, the cross section of the rotation stopping groove can be oval, track-shaped, or rounded rectangular. By opening the rotation stopping groove in the top wall and the bottom wall of the connecting piece 400b, when the first transmission rod 321b is installed in the connecting piece 400b, the two rotation stopping parts 3211b are matched with the two rotation stopping grooves to achieve circumferential limiting of both ends, and the first transmission rod 321b and the connecting piece 400b can be further avoided from being axially loose, and the connection reliability of the first transmission rod 321b and the connecting piece 400b is further improved. In other embodiments, the second transmission rod 322b is also provided with the rotation stopping part 3211b, so that the second transmission rod 322b and the connecting part 312b are matched with the rotation stopping part 3211b and the rotation stopping groove to achieve circumferential limiting.

[0126] In an embodiment, as shown in FIG. 17, FIG. 19, FIG. 22, FIG. 23, and FIG. 25, the connecting piece 400b comprises a first mounting portion 420b and at least one second mounting portion 430b connected to each other, the first transmission rod 321b is fixedly connected to the first mounting portion 420b, and each second transmission rod 322b is fixedly mounted to a second mounting portion 430b; the first mounting portion 420b abuts against the top of the connecting portion 312b and the sleeve 200b; and the bottom surface of the second mounting portion 430b towards the sealing element 100 is higher than the bottom surface of the first mounting portion 420b towards the sealing element 100.

[0127] In the embodiment, the first mounting portion 420b of the connecting piece 400b is used for mounting the first transmission rod 321b, and the second mounting portion 430b is used for mounting the second transmission rod 322b. The first mounting portion 420b abuts against the top of the connecting portion 312b and the sleeve 200b, which on one hand facilitates the welding of the first transmission rod 321b and the sleeve 200b, and on the other hand the first mounting portion 420b can also shield the connecting portion 312b and the sleeve 200b, thereby playing a secondary sealing role and further improving the overall sealing effect of the shaft connecting portion. The bottom surface of the second mounting portion 430b towards the sealing element 100 is higher than the bottom surface of the first mounting portion 420b towards the sealing element 100, so that the second mounting portion 430b is spaced apart from the sealing element 100, thereby avoiding friction between the second mounting portion 430b and the sealing element 100, improving the service life of the sealing element 100, and avoiding friction noise.

[0128] A third embodiment (FIG. 26 to FIG. 38) provides a hair trimmer.

[0129] Current hair trimmers, such as razors, adopt a multi-head structure in order to improve the shearing efficiency and adapt to different use scenarios. In order to reduce costs and product miniaturization, current hair trimmers mostly use one or two motors, and therefore, it is usually necessary to connect multiple connecting rods to one output end of the motor. The output end of the existing motor and the multiple transmission rods are mostly connected by integral injection molding, which is not easy to assemble, has a complex structure, is high in cost, and is difficult to ensure the sealing effect of the output end of the motor.

[0130] In view of the above problems, the third embodiment of the present application provides a hair trimmer, which aims to solve the technical problems of poor sealing and difficult assembly of multiple transmission rods.

[0131] In the embodiment of the present application, please refer to FIG. 10, FIG. 26 to FIG. 33, the hair trimmer can be a electric razor.

[0132] Specifically, the hair trimmer comprises the motor 40, the sealing assembly 101c and the first transmission unit 301c; the motor 40 has a first output end 421 movable back and forth; the sealing assembly 101c has a first sealing hole 110c; the first transmission unit 301c comprises a transmission unit assembly 3011c and a first base 311c, the transmission unit assembly 3011c is located at a side of the sealing assembly 101c away from the motor 40, the transmission unit assembly 3011c comprises a connecting seat 340c and at least two third transmission rods 321c arranged on the connecting seat 340c, the connecting seat 340c is fixedly connected to the first base 311c, the first base 311c is fixedly connected to the first output end 421, the first base 311c passes through the first sealing hole 110c, and a hole wall of the first sealing hole 110c is tightly fitted with the first base 311c.

[0133] It can be understood that the razor sealing structure 10 comprises the sealing assembly 101c and the first transmission unit 301c.

[0134] The motor 40 comprises a first motor 420c having the first output end 421. Specifically, the motor 40 is provided in plurality and is divided into the first motor 420c and a second motor 430c, the first motor 420c has the first output end 421. Specifically, the first motor 420c can be a linear motor, so that the first output end 421 is movable back and forth along a preset direction. The sealing assembly 101c is mounted at an opening of the main housing 20, a lower end of the first base 311c is arranged in the main housing 20 and connected with the first output end 421, and an upper end of the first base 311c is sealed through the first sealing hole 110c and fixedly connected with the connecting seat 340c.

[0135] The first motor 420c specifically comprises a stator assembly and a rotor assembly, the rotor assembly comprises a permanent magnet and a connecting seat, the permanent magnet is fixed on the connecting seat, and the connecting seat forms the first output end 421. The stator assembly comprises an iron core, a bobbin and a coil, the coil is wound on the bobbin and mounted on the iron core through the bobbin. The iron core can be a U-shaped iron core, an E-shaped iron core or the like, and different types of iron cores can be selected according to actual needs, which are not specifically limited here. After the coil passes through the alternating current, the stator assembly forms an electromagnet, which drives the rotor assembly to move back and forth along a preset direction through the magnetic induction of the electromagnet and the permanent magnet of the rotor assembly. Specifically, the first base 311c is fixedly connected to the connecting seat of the stator assembly through a screw. By connecting the plurality of third transmission rods 321c with the plurality of cutter heads of the cutter head assembly 30 respectively, the motor 40 can drive the plurality of cutter heads to move back and forth quickly, so as to realize synchronous cutting of the plurality of cutter heads.

[0136] The sealing assembly 101c specifically comprises a sealing piece 100 made of flexible materials such as rubber and silica gel, and the first sealing hole 110c is formed on the sealing piece 100. The number of the third transmission rods 321c can be selected and designed according to the number of the actual required cutting heads, which is not specifically limited here. The plurality of third transmission rods 321c can be connected as a whole through the connecting seat 340c, so that only one motor output end can drive the plurality of third transmission rods 321c to move reciprocatingly synchronously, which can effectively reduce the cost while meeting the multi-cutting head cutting, and realize the miniaturization of the hair trimmer.

[0137] The first transmission unit 301c of the hair trimmer is connected with the plurality of third transmission rods 321c as a whole through the connecting seat 340c, and the transmission unit assembly 3011c is fixedly connected with the first base 311c, which can more conveniently assemble the plurality of transmission rods while ensuring the connection stability of the third transmission rods 321c. In addition, the first base 311c is arranged to pass through the first sealing hole 110c, and the hole wall of the first sealing hole 110c is tightly fitted with the first base 311c, which can avoid the direct contact between the transmission rod and the sealing piece 100, thereby improving the service life of the sealing piece 100 and ensuring the sealing effect.

[0138] In an embodiment, as shown in FIGS. 29, 32-34, the first base 311c comprises a first base 3111c and a connecting cylinder 3112c connected with each other; the first base 3111c is fixedly connected with the first output end 421; the connecting cylinder 3112c passes through the first sealing hole 110c and is fixedly fitted with the hole wall of the first sealing hole 110c; and the connecting cylinder 3112c is fixedly connected with the connecting seat 340c through the locking piece 370c.

[0139] In the embodiment, the first base 311c can be made of plastic material to reduce the weight of the first transmission unit 301c. In other embodiments, the first transmission unit 301c can also be made of metal material. In order to ensure the structural strength, the first base 3111c and the connecting cylinder 3112c are integrally formed. The first base 3111c can be specifically provided in a plate shape, the first base 3111c is fixedly connected with the first output end 421 through screws, and the connecting cylinder 3112c is connected to the plate surface of the first base 3111c. A clamping ring can be specifically arranged on the outer periphery of the first sealing hole 110c, so that the hole wall of the first sealing hole 110c is fixedly fitted with the connecting cylinder 3112c. Of course, the two can also be fixedly connected through secondary injection molding. The locking piece 370c can be specifically a screw. By fixing the connecting cylinder 3112c and the connecting seat 340c through the locking piece 370c, the connection between the two is stable and reliable, and the disassembly and assembly are more convenient. After the connecting seat 340c is worn out, the connecting seat 340c can be separately disassembled and replaced, so as to reduce the maintenance cost.

[0140] Further, the connecting seat 340c is spaced apart from the sealing assembly 101c, that is, the connecting barrel 3112c extends upward beyond the first sealing hole 110c at the end away from the first base 3111c, so that the bottom surface of the connecting seat 340c is spaced apart from the upper surface of the sealing assembly 101c when the connecting seat 340c is connected to the connecting barrel 3112c. In this way, friction between the connecting seat 340c and the sealing assembly 101c can be avoided to prevent noise.

[0141] Further, the metal connecting piece 3114c is fixedly embedded in the connecting barrel 3112c, and the locking piece 370c is threaded through the connecting seat 340c and fixedly connected to the metal connecting piece 3114c.

[0142] In this embodiment, the metal connecting piece 3114c can be made of stainless steel, aluminum alloy, copper, or the like. The metal connecting piece 3114c can be in a columnar shape, such as a circular column, a rectangular column, or the like. The locking piece 370c can be a screw, and the metal connecting piece 3114c is provided with a threaded hole at the upper end. The locking piece 370c and the metal connecting piece 3114c are fixed by screwing. The metal connecting piece 3114c and the connecting barrel 3112c can be fixedly connected by secondary injection molding. It can be understood that since the plurality of third transmission rods 321c are connected to the connecting seat 340c, the weight of the plurality of tool bits is concentrated on the connecting seat 340c, and thus stress is concentrated at the connection between the locking piece 370c and the connecting seat 340c and the connecting barrel 3112c. By arranging the metal connecting piece 3114c in the connecting barrel 3112c, the locking piece 370c is connected to the metal connecting piece 3114c, which can improve the structural strength of the connection of the locking piece 370c compared to the direct connection of the locking piece 370c to the connecting barrel 3112c, avoid structural damage to cause connection failure, and make the connection between the connecting seat 340c and the first base 311c more stable and reliable to increase the service life.

[0143] Further, please refer to FIGS. 32-34, 37 and 38, the connecting barrel 3112c is provided with a blocking portion 3113c at one end away from the first base 3111c; the connecting seat 340c is provided with an adapting portion 350c corresponding to the blocking portion 3113c, and the blocking portion 3113c and the adapting portion 350c are limited in cooperation in the axial direction of the connecting barrel 3112c. Through the cooperation of the blocking portion 3113c and the adapting portion 350c, the connecting seat 340c can be prevented from rotating relative to the connecting barrel 3112c, and the locking member 370c and the metal connecting piece 3114c, the connecting seat 340c can be prevented from loosening, and the connection stability between the connecting seat 340c and the first base 311c is further improved. In addition, the tool bit can also be prevented from shaking due to the rotation of the connecting seat 340c relative to the first base 311c, which affects the cutting efficiency, so as to ensure the use effect of the product. The structure of the blocking portion 3113c and the adapting portion 350c can be many, as long as they can limit the rotation of the connecting seat 340c relative to the connecting barrel 3112c after cooperation.

[0144] Further, the blocking portion 3113c is a limiting protrusion, the adapting portion 350c is a limiting groove, the cross-sectional shape of the limiting groove is non-circular, and the limiting protrusion is adapted and installed in the limiting groove. In this way, the cooperation of the blocking portion 3113c and the adapting portion 350c can also provide pre-positioning for the installation of the connecting seat 340c and the connecting barrel 3112c, so as to reduce the assembly difficulty and improve the assembly efficiency. The cross-sectional shape of the limiting groove is non-circular, and the limiting protrusion is embedded in the limiting groove to achieve circumferential limiting and avoid relative rotation. Specifically, the cross-sectional shape of the limiting groove can be a rounded rectangle. Of course, the cross-sectional shape of the limiting groove can also be oval, track-shaped, special-shaped, etc. In other embodiments, the blocking portion 3113c can also be a groove, and the adapting portion 350c can be a protrusion.

[0145] In an embodiment, please refer to FIGS. 32-34, the connecting seat 340c is provided with a through installation hole 360c, the locking member 370c is arranged through the installation hole 360c and connected with the first base 311c; the first transmission unit 301c further includes a sealing plug 380c, and the sealing plug 380c is sealingly installed at the port of the installation hole 360c away from the first output end 421. The sealing plug 380c can be a silica gel plug, a rubber plug, etc. The through installation hole 360c in the thickness direction of the connecting seat 340c is more convenient for the connection of the locking member 370c. By sealingly installing the sealing plug 380c at the port of the installation hole 360c away from the first output end 421, the hair can be effectively prevented from falling into the installation hole 360c.

[0146] In an embodiment, as shown in FIG. 29, FIG. 32-34, and FIG. 37, the transmission unit assembly 3011c further comprises a plurality of first cladding layers 330c, each of which is sleeved on the outer side of a third transmission rod 321c. The first cladding layer 330c can be made of plastic or elastic material. By sleeving the first cladding layer 330c on each third transmission rod 321c, the friction noise between the third transmission rod 321c and the cutter head can be reduced.

[0147] Further, the connecting seat 340c and the plurality of first cladding layers 330c are integrally formed and made of plastic material; and the third transmission rod 321c is made of metal material.

[0148] In the embodiment, the integrally formed connection between the plurality of first cladding layers 330c and the connecting seat 340c ensures the connection strength. The plastic material of the connecting seat 340c and the plurality of first cladding layers 330c can reduce the friction noise between the third transmission rod 321c and the cutter head. The metal material of the third transmission rod 321c ensures the structural strength. The secondary injection molding connection between the first cladding layer 330c and the third transmission rod 321c can ensure the surface precision of the first cladding layer 330c while improving the stable connection therebetween.

[0149] In an embodiment, referring to FIG. 27-34, the motor 40 further comprises a second output end 431 that can reciprocate, and the sealing assembly 101c further comprises a second sealing hole 120c spaced from the first sealing hole 110c; the hair trimmer further comprises a second transmission unit 302c, which comprises a second base 312c and a fourth transmission rod 322c arranged on the second base 312c; the second transmission rod 410 is located on the side of the sealing assembly 101c away from the motor 40; the second base 312c is fixedly connected to the second output end 431, the second base 312c passes through the second sealing hole 120c, and the hole wall of the second sealing hole 120c is tightly fixed to the second base 312c.

[0150] In the embodiment, the motor 40 further comprises a second motor 430 having a second output end 431. Specifically, the second motor 430 is a linear motor, so that the second output end 431 can reciprocate along a preset direction. The sealing assembly 101c further has a second sealing hole 120c spaced from the first sealing hole 110c, so that the first transmission unit 301c and the second transmission unit 302c are respectively sealed, and the sealing effect of each transmission unit can be ensured. The number of the fourth transmission rods 322c can be selected and designed according to the number of the actual required tool bits, for example, the fourth transmission rods 322c can be provided with only one. The second base 312c and the second output end 431 of the motor 40 can be fixedly connected by screws or the like. The second base 312c is partially sealed and penetrates the second sealing hole 120c and is fixedly connected with the fourth transmission rods 322c, so that the transmission rods can be prevented from directly contacting the sealing member 100, and the service life of the sealing member 100 can be improved, and the sealing effect can be ensured.

[0151] Further, as shown in FIGS. 29, 32-34 and 36, the second base 312c comprises a second base 411 and a column 3124c; the second base 411 is fixedly connected with the second output end 431, one end of the column 3124c is connected with the second base 411, and the other end of the column 3124c is connected with the fourth transmission rods 322c; the column 3124c penetrates and tightly fits the hole wall of the second sealing hole 120c.

[0152] In the embodiment, in order to ensure the structural strength, the second base 411, the column 3124c and the fourth transmission rods 322c are integrally formed and are made of metal materials such as stainless steel, aluminum alloy and the like. The column 3124c is used for sealing and embedding in the second sealing hole 120c. Specifically, a clamping ring can be arranged on the outer periphery of the second sealing hole 120c, so that the hole wall of the second sealing hole 120c and the outer peripheral wall of the column 3124c are tightly fixed. Of course, the two can also be fixedly connected by means of secondary injection molding. In addition, when the number of tool bits connected to the second transmission unit 302c is less than the number of tool bits connected to the first transmission unit 301c, the loads of the two are different, which can cause the whole machine to have a strong shock feeling. By using metal materials for the second base 312c, the distributed weights of the first transmission unit 301c and the second transmission unit 302c can be balanced, and the shock feeling of the whole machine can be effectively weakened.

[0153] In other embodiments, the fourth transmission rods 322c can be made of metal materials such as stainless steel, and the second base 312c is made of plastic. The fourth transmission rods 322c and the column 3124c of the second base 312c can be fixedly connected by means of secondary injection molding. By embedding the fourth transmission rods 322c in the column 3124c, the connection reliability of the fourth transmission rods 322c and the second base 312c can be ensured, and the cost can be reduced.

[0154] Further, the second transmission unit 302c further comprises a second covering layer 390c, which is sleeved on the outside of the fourth transmission rod 322c. The second covering layer 390c can be made of plastic or elastic material. By sleeving the second covering layer 390c on the fourth transmission rod 322c, the friction noise between the fourth transmission rod 322c and the tool bit can be reduced.

[0155] In an embodiment, referring to FIGS. 29-34 and 36, the number of the third transmission rods 321c is greater than the number of the fourth transmission rods 322c, and the weight of the second base 312c is greater than the weight of the first base 311c. When the number of the tool bits is odd, the number of the transmission rods on the first transmission unit 301c and the second transmission unit 302c is unbalanced. Since the first transmission unit 301c has the transmission unit assembly 3011c, the number of the transmission rods can be set to be more. However, when the number of the tool bits connected to the first transmission unit 301c and the second transmission unit 302c is unbalanced, the whole machine will have a strong vibration. By making the weight of the second base 312c greater than the weight of the first base 311c, the weight distributed on the first transmission unit 301c and the second transmission unit 302c can be balanced, thereby effectively weakening the vibration of the whole machine.

[0156] Further, referring again to FIGS. 29-34 and 36, the first base 311c and the first base 3111c connected to the first output end 421 are plate-shaped; the second base 312c and the second base 411 connected to the second output end 431 comprise a bottom plate 3122c and a counterweight 3123c connected to each other, the counterweight 3123c extends away from the fourth transmission rod 322c, and the cross-sectional size of the bottom plate 3122c is greater than the cross-sectional size of the first base 3111c.

[0157] In the embodiment, the first base 311c is plate-shaped, which is more convenient for connecting the first base 311c with the first output end 421. The counterweight 3123c can be connected to the bottom plate 3122c adjacent to the periphery of the second output end 431. Specifically, the counterweight 3123c is arranged between the first output end 421 and the second output end 431. It can be understood that, due to the limited space in the installation cavity of the hair trimmer, and the first output end 421 and the second output end 431 are usually arranged side by side, the distance between the first output end 421, the second output end 431 and the sealing assembly 101c is basically equal, therefore, if the thickness of the bottom plate 3122c of the second base 312c is set to be greater than that of the first base 3111c to increase the weight, it will cause the waste of space in the installation cavity. By arranging the counterweight 3123c extending away from the fourth transmission rod 322c, and making the cross-sectional dimension of the bottom plate 3122c greater than that of the first base 3111c, the weight of the second base 312c is greater than that of the first base 311c, which makes full use of the space between the first output end 421 and the second output end 431 and the transverse space in the installation cavity, so that the structure of the whole machine is more compact, and it is more conducive to realizing the miniaturization of the whole machine. In other embodiments, a counterweight can also be arranged on the second base 411 of the second base 312c, or the thickness of the second base 411 of the second base 312c is greater than that of the first base 3111c of the first base 311c, so that the weight of the second base 312c is greater than that of the first base 311c.

[0158] Specifically, as shown in FIGS. 29-35, the sealing assembly 101c includes a plate body 900 and a sealing member 100 fixedly mounted on the plate body 900; the plate body 900 has a first mounting hole 9111c and a second mounting hole 9112c, the sealing member 100 includes a first sealing sleeve 150c and a second sealing sleeve 160c connected with each other, the first sealing sleeve 150c is sealingly embedded in the first mounting hole 9111c, and the second sealing sleeve 160c is sealingly embedded in the second mounting hole 9112c; the first sealing sleeve 150c is provided with a first sealing hole 110c, and the second sealing sleeve 160c is provided with a second sealing hole 120c.

[0159] In the embodiment, the sealing member 100 can be fixedly connected with the plate body 900 by embedding, bonding or the like. In assembly, the sealing member 100 is first fixed on the plate body 900, and then the plate body 900 is mounted on the main machine shell 260. By arranging the plate body 900 to mount the sealing member 100, the disassembly and assembly of the sealing member 100 can be simplified.

[0160] Further, the first mounting hole 9111c is larger than the second mounting hole 9112c; the periphery of the first sealing hole 110c extends a first inner cylinder wall 130c, the periphery of the second sealing hole 120c extends a second inner cylinder wall 140c, and the extension height of the second inner cylinder wall 140c is greater than the extension height of the first inner cylinder wall 130c.

[0161] In the embodiment, the first transmission unit 301c has the transmission unit assembly 3011c, so that the first mounting hole 9111c needs to be larger than the second mounting hole 9112c. Since the first mounting hole 9111c is larger than the second mounting hole 9112c, the transverse dimension of the first sealing sleeve 150c is larger than the transverse dimension of the second sealing sleeve 160c. Thus, the first sealing sleeve 150c can be provided in a multi-pleated structure to ensure the deformation amount required for the reciprocating movement of the third transmission rod 321c. Since the transverse dimension of the second sealing sleeve 160c is smaller, by making the extension height of the second inner cylinder part greater than the extension height of the first inner cylinder part, the size of the second sealing sleeve 160c in the longitudinal direction can be increased, thereby being able to meet the deformation amount required for the reciprocating movement of the fourth transmission rod 322c. In this way, the sealing and deformation requirements of the sealing member 100 are met while making the overall structure more compact and the overall volume smaller. Specifically, the second inner cylinder wall 140c extends away from the second output end 431 to the top wall of the protruding plate body 900. In order to avoid interference of the second inner cylinder wall 140c with the connecting seat 340c, specifically, the first inner cylinder wall 130c extends downward away from the connecting seat 340c.

[0162] In an embodiment, referring to FIGS. 28, 29, 32-34, the outer periphery of the first inner cylinder wall 130c and the second inner cylinder wall 140c is provided with a clamping member 200c, so that the first inner cylinder wall 130c is tightly fitted and fixed to the first base 311c, and the second inner cylinder wall 140c is tightly fitted and fixed to the second base 312c. The clamping member 200c can be a clamping spring, a clamping sleeve, etc. By providing the clamping member 200c on the outer periphery of the first inner cylinder wall 130c and the second inner cylinder wall 140c, the first inner cylinder wall 130c can be tightly fitted to the first base 311c, and the second inner cylinder wall 140c can be tightly fitted to the second base 312c, so that no gap is generated between the inner cylinder wall and the fixing seat, and the sealing effect of the sealing member 100 on the first base 311c and the second base 312c is better.

[0163] In an embodiment, as shown in FIGS. 27-34, the first sealing sleeve 150c and the second sealing sleeve 160c are connected, the motor 40 includes a first motor 420c and a second motor 430, the first motor 420c has a first output end 421, and the second motor 430 has a second output end 431, the movement directions of the first output end 421 and the second output end 431 are opposite.

[0164] In the embodiment, the first motor 420c and the second motor 430 are linear motors, which drive the first output end 421 and the second output end 431 to reciprocate and reverse in the preset direction. The specific structure of the first motor 420c and the second motor 430 can refer to the existing design, which is not limited here. The motion direction of the first output end 421 of the first motor 420c and the second output end 431 of the second motor 430 is opposite, which can offset the rotational inertia generated when the two move, and further weaken the whole machine vibration. The first sealing sleeve 150c is connected with the second sealing sleeve 160c, that is, the first sealing sleeve 150c and the second sealing sleeve 160c are connected as a whole, rather than two independent parts. In this way, the vibration transmitted by the first output end 421 and the second output end 431 to the first sealing sleeve 150c and the second sealing sleeve 160c can be partially offset and absorbed, further weakening the whole machine vibration.

[0165] In other embodiments, the first motor 420c and the second motor 430 can also be rotary motors, which drive the first output end 421 and the second output end 431 to reciprocate and reverse in the preset direction through conversion devices that convert rotary motion into linear motion.

[0166] Further, the plate body 900 includes a mounting plate 910 and a crimping plate 920; the sealing element 100 further includes a connecting bottom sheet 170c connecting the first sealing sleeve 150c and the second sealing sleeve 160c, the connecting bottom sheet 170c surrounds the outer periphery of the first sealing sleeve 150c and the second sealing sleeve 160c, and the connecting bottom sheet 170c is crimped between the mounting plate 910 and the crimping plate 920. The mounting plate 910 and the crimping plate 920 can be fixedly connected by screws or the like. The outer periphery of the first sealing sleeve 150c and the second sealing sleeve 160c is connected by the connecting bottom sheet 170c, which can ensure the connection strength of the two and avoid breaking due to long-term deformation. The first sealing sleeve 150c and the second sealing sleeve 160c are fixed to the plate body 900 through the connecting bottom sheet 170c at the outer periphery, which can increase the fixing area of the sealing element 100 and the plate body 900, improve the connection stability while ensuring the sealing reliability, and make the connecting bottom sheet 170c crimped between the bottom cover and the crimping plate 920, which is more convenient for disassembling the sealing element 100 and the plate body 900.

[0167] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electric shaver, wherein, The shaver sealing structure comprises a main shell, a cutter head assembly, a motor and a sealing structure, the main shell has an opening, the motor is installed in the main shell, and the sealing structure is fixedly connected to the opening; The sealing structure comprises: A transmission assembly, the transmission assembly comprises a base and a transmission rod, the base is connected to the output end of the motor, and the transmission rod is connected to the cutter head assembly, and the base drives the transmission rod to move; A sealing element is sealingly connected to the main shell and covers the opening, the transmission rod penetrates the sealing element, and the sealing element deforms with the movement of the transmission rod, wherein the sealing element is an annular pleated structure and seals the transmission rod while achieving reciprocating movement of the transmission rod.

2. The electric shaver according to claim 1, wherein The base and the transmission rod are connected to each other, the sealing element is provided with a sealing through hole, the transmission rod penetrates the sealing through hole, and the transmission assembly further comprises: A pressing element, the pressing element is fixedly connected to the base, and the periphery of the sealing through hole is arranged between the pressing element and the base, so that the pressing element and the base tightly press the periphery of the sealing through hole.

3. The electric shaver according to claim 2, wherein The sealing element comprises a sealing cylinder, and the middle part of the sealing cylinder is provided with the sealing through hole; the base comprises a base plate and a connecting column connecting the base plate and the transmission rod; the base plate is connected to the output end of the motor, the connecting column is arranged in the sealing cylinder, and the pressing element tightly presses the sealing cylinder and the connecting column.

4. The electric shaver according to claim 3, wherein The sealing element further comprises a sealing part in the form of an annular pleat, one end of the sealing cylinder away from the transmission rod is connected to the sealing part, one end of the sealing cylinder close to the transmission rod has an end wall, the end wall is provided with the sealing through hole; the cross-sectional area of the connecting column is greater than that of the transmission rod; the pressing element comprises a pressing plate sleeved on the periphery of the transmission rod, and the end wall is clamped between the pressing plate and the end face of the connecting column; And / or, the pressing element has a pressing ring extending in the same direction as the sealing cylinder, the pressing ring is tightly sleeved on the periphery of the sealing cylinder, and the outer peripheral wall of the sealing cylinder is tightly fitted with the pressing ring, so that the inner peripheral wall of the sealing cylinder is tightly fitted with the connecting column.

5. The electric shaver according to claim 2, wherein The inner peripheral wall of the sealing through hole is tightly fitted with the outer peripheral surface of the transmission rod; And / or, the sealing structure further comprises a shaft sleeve sleeved on the periphery of the transmission rod, and the pressing element is sleeved on the periphery of the transmission rod and is at least partially clamped between the shaft sleeve and the base; And / or, the transmission rod is made of plastic material; And / or, the pressing element is made of metal material; And / or, the pressing element and the base are detachably fixedly connected. And / or, the sealing member comprises a sealing cylinder, a connecting sheet and a sealing part in the shape of an annular pleat, the connecting sheet is connected to the outer edge of the sealing part, the sealing cylinder is connected to the inner edge of the sealing part, the sealing cylinder is provided with an end wall near one end of the transmission rod, the end wall is provided with the sealing through hole; the razor sealing structure further comprises a mounting plate and a press plate, the mounting plate and the press plate are provided with through holes for the sealing part to pass through; the connecting sheet is pressed between the mounting plate and the press plate.

6. The electric shaver according to claim 5, wherein In the case that the sealing member comprises a sealing cylinder, a connecting sheet and a sealing part in the shape of an annular pleat, The sealing member further comprises a limiting ring provided corresponding to the outer periphery of the sealing part, the limiting ring and the sealing part are respectively connected to the opposite sides of the connecting sheet; the outer peripheral wall of the sealing part and the limiting ring respectively abuts the inner wall of the through hole of the mounting plate and the press plate; And / or, the razor sealing structure further comprises a sealing ring, the sealing ring is connected to the connecting sheet, the sealing ring is fixed to the side of the press plate away from the transmission rod, so as to seal the press plate and the main machine shell.

7. The electric shaver according to claim 2, wherein The sealing member is provided with at least two sealing through holes, the transmission assembly and the press-fit member are provided with at least two, the transmission rod of the plurality of transmission assemblies corresponds to the plurality of sealing through holes one by one, and each press-fit member tightly presses the periphery of a sealing through hole.

8. The electric shaver according to claim 7, wherein The razor sealing structure comprises a first shaft sleeve and a second shaft sleeve, the first shaft sleeve comprises a sleeve part, a transmission rod part and a shaft connecting part connecting the sleeve part and the transmission rod part, the sleeve part is sleeved on one of the transmission rods, one of the press-fit members is at least partially clamped between the sleeve part and the base, and the transmission rod part extends in the same direction as the transmission rod; another press-fit member is at least partially clamped between the second shaft sleeve and the base.

9. The electric shaver according to claim 1, wherein The sealing member is provided with a shaft hole; The base comprises a seat body and a connecting part connected to each other, the connecting part passes through the shaft hole and is tightly fixed with the sealing member, the seat body is connected with the output end of the motor and can reciprocate under the driving of the motor; The razor sealing structure further comprises a sleeve, the sleeve is fixedly embedded in the connecting part, and the hardness of the sleeve is greater than that of the connecting part; The transmission rod comprises a first transmission rod fixedly installed in the sleeve.

10. The electric shaver according to claim 9, wherein The sealing member has a sealing cylinder extending in the axial direction of the first transmission rod, and the middle part of the sealing cylinder forms the shaft hole; the connecting part is adaptively embedded in the sealing cylinder; And / or, the connecting part is provided with an embedding hole, and the sleeve is embedded in the embedding hole.

11. The electric shaver according to claim 10, wherein In the case that the sealing member has a cylinder body extending in the axial direction of the first transmission rod, The inner peripheral wall of the cylinder body is provided with an embedding convex ring, and the outer peripheral wall of the connecting part is provided with an embedding groove matched with the embedding convex ring; And / or, the sealing member further comprises a sealing body and a connecting ring connected to the outer peripheral wall of the sealing body, and the sealing body is connected to the outer wall of the cylinder body; the connecting ring is sealingly connected to the main machine shell.

12. The electric shaver according to claim 10, wherein In the case that the connecting part is provided with an embedding hole, The sleeve further comprises a limiting slot connected with the embedding hole, the sleeve comprises an embedding part and a limiting part connected with each other, the embedding part is embedded in the embedding hole, and the limiting part is limitedly installed in the limiting slot in the axial direction of the first transmission rod and in the circumferential direction of the first transmission rod; And / or, the sleeve has a fixing hole, the first transmission rod is embedded in the fixing hole; the sleeve and the first transmission rod are made of metal material, and the base is made of plastic material.

13. The electric shaver according to any of claims 9 to 12, wherein The electric shaver further comprises a connecting piece and at least one second transmission rod, the connecting piece is arranged on the side of the sealing piece away from the base and is fixedly connected with the first transmission rod, and the at least one second transmission rod is arranged on the connecting piece and is arranged side by side with the first transmission rod.

14. The electric shaver according to claim 13, wherein The second transmission rod and the first transmission rod are both connected with the connecting piece by means of secondary injection molding; And / or, the outer peripheral wall of the first transmission rod is provided with a rotation-stopping part, the connecting piece is provided with a matching part corresponding to the rotation-stopping part, and the rotation-stopping part is limitedly matched with the matching part in the circumferential direction of the first transmission rod; And / or, the connecting piece comprises a first mounting part and at least one second mounting part connected with each other, the first transmission rod is fixedly connected with the first mounting part, and each second transmission rod is fixedly mounted on a second mounting part; the first mounting part abuts against the connecting part and the top of the sleeve; the bottom surface of the second mounting part towards the sealing piece is higher than the bottom surface of the first mounting part towards the sealing piece.

15. The electric shaver according to claim 1, wherein The motor has a first output end which can move reciprocally; The shaver sealing structure comprises: a sealing assembly having a first sealing hole; a first transmission unit comprising a transmission unit assembly and a first base; the transmission unit assembly is located on the side of the sealing assembly away from the motor, the transmission unit assembly comprises a connecting seat and at least two third transmission rods arranged on the connecting seat, and the connecting seat is fixedly connected with the first base; the first base is fixedly connected with the first output end, the first base passes through the first sealing hole, and the hole wall of the first sealing hole is tightly matched with the first base.

16. The electric shaver according to claim 15, wherein The first base comprises a first base and a connecting cylinder connected with each other; the first base is fixedly connected with the first output end; the connecting cylinder passes through the first sealing hole and is fixedly matched with the hole wall of the first sealing hole; the connecting cylinder is fixedly connected with the connecting seat through a locking piece; And / or, the transmission unit assembly further comprises a plurality of first cladding layers, and the plurality of first cladding layers are correspondingly sleeved on the outer sides of the plurality of third transmission rods.

17. The electric shaver according to claim 16, wherein In the case where the first base comprises a first base and a connecting cylinder connected with each other; The connecting cylinder is fixedly embedded with a metal connecting piece, and the locking piece passes through the connecting seat and is fixedly connected with the metal connecting piece; And / or, one end of the connecting cylinder away from the first base is provided with a blocking part; the connecting seat is provided with an adapting part corresponding to the blocking part, and the blocking part and the adapting part are limitedly matched in the axial direction of the connecting cylinder. And / or, the connecting seat is provided with a through mounting through hole, the locking piece penetrates the mounting through hole and is fixedly connected with the connecting cylinder; the first transmission unit further comprises a sealing plug, the sealing plug is sealingly installed at the port of the mounting through hole away from the first output end.

18. The electric shaver according to claim 15, wherein The motor further comprises a second output end which can be reciprocally moved, the sealing assembly further has a second sealing hole which is spaced from the first sealing hole; the electric shaver further comprises a second transmission unit, the second transmission unit comprises a second base and a fourth transmission rod arranged on the second base; the fourth transmission rod is located at the side of the sealing assembly away from the motor; the second base is fixedly connected with the second output end, the second base penetrates the second sealing hole, and the hole wall of the second sealing hole is tightly fitted with the second base.

19. The electric shaver according to claim 18, wherein The second base comprises a second base and a column body; the second base is fixedly connected with the second output end, one end of the column body is connected with the second base, and the other end of the column body is connected with the fourth transmission rod; the column body penetrates and is tightly fitted with the hole wall of the second sealing hole.

20. The electric shaver according to claim 19, the second transmission unit further comprises a second cladding layer, the second cladding layer is sleeved on the outside of the fourth transmission rod; And / or, the number of the third transmission rods is greater than the number of the fourth transmission rods, and the weight of the second base is greater than the weight of the first base; And / or, the sealing assembly comprises a plate body and a sealing piece fixedly installed on the plate body; the plate body has a first mounting hole and a second mounting hole, the sealing piece comprises a first sealing sleeve and a second sealing sleeve, the first sealing sleeve is sealingly embedded in the first mounting hole, and the second sealing sleeve is sealingly embedded in the second mounting hole; the first sealing sleeve is provided with the first sealing hole, and the second sealing sleeve is provided with the second sealing hole.

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