Hair trimmer

Abstract

The embodiment of the utility model discloses a hair trimmer which comprises a motor assembly, a sealing assembly and a first transmission unit. The motor assembly is provided with a first output end capable of reciprocating; the sealing assembly is provided with a first sealing hole; the first transmission unit comprises a transmission assembly and a first fixing seat; the transmission assembly is located on the side, away from the motor assembly, of the sealing assembly. The transmission assembly comprises a connecting base and at least two first transmission rods arranged on the connecting base, the connecting base is fixedly connected to the first fixing base, the first fixing set is fixedly connected to the first output end, the first fixing base penetrates through the first sealing hole, and the hole wall of the first sealing hole is tightly attached to the first fixing base. The hair trimmer is provided with a plurality of transmission rods, and is good in sealing performance and easy to assemble.

Description

Technical Field

[0001] The present application relates to the technical field of hair cutting, and in particular to a hair trimmer. Background Art

[0002] Current hair trimmers, such as shavers, employ multiple blades to improve cutting efficiency and adapt to different usage scenarios. To reduce costs and minimize product size, current hair trimmers often utilize one or two motors. Consequently, a single motor output terminal typically requires simultaneous connection to multiple connecting rods. Existing connections between the motor output terminal and multiple transmission rods often utilize one-piece injection molding. This approach is difficult to assemble, complex, and costly, and it is difficult to ensure a sealed seal at the motor output terminal.

[0003] The above content is only used to assist in understanding the technical solution of the utility model and does not constitute an admission that the above content is prior art. Utility Model Content

[0004] In view of the above problems, the present invention provides a hair trimmer, which aims to solve the technical problems of poor sealing and difficult assembly of multi-transmission rods.

[0005] To achieve the above-mentioned purpose, the hair trimmer proposed in the present invention comprises:

[0006] a motor assembly having a first output end that is reciprocatable;

[0007] a sealing assembly having a first sealing hole;

[0008] The first transmission unit includes a transmission assembly and a first fixed seat; the transmission assembly is located on the side of the sealing assembly away from the motor assembly, the transmission assembly includes a connecting seat and at least two first transmission rods arranged on the connecting seat, the connecting seat is fixedly connected to the first fixed seat; the first fixed seat is fixedly connected to the first output end, the first fixed seat passes through the first sealing hole, and the hole wall of the first sealing hole is tightly fitted with the first fixed seat.

[0009] In one embodiment, the first fixing seat includes a first base and a connecting tube that are connected to each other; the first base is fixedly connected to the first output end; the connecting tube passes through the first sealing hole and is tightly fitted and fixed to the hole wall of the first sealing hole; the connecting tube and the connecting seat are fixedly connected by fasteners.

[0010] In one embodiment, a metal connector is fixedly embedded in the connecting cylinder, and the fastener passes through the connecting seat and is fixedly connected to the metal connector.

[0011] In one embodiment, a limiting portion is provided at one end of the connecting tube away from the first base; the connecting seat is provided with a matching portion corresponding to the limiting portion, and the limiting portion and the matching portion are matched to limit the position in the axial direction around the connecting tube.

[0012] In one embodiment, the connecting seat is provided with a through mounting hole, the fastener passes through the mounting hole and is fixedly connected to the connecting tube; the first transmission unit also includes a sealing plug, which is sealingly installed on the port of the mounting hole away from the first output end.

[0013] In one embodiment, the transmission assembly further includes a plurality of first covering layers, and the plurality of first covering layers are sleeved on the outer sides of the plurality of first transmission rods in a one-to-one correspondence.

[0014] In one embodiment, the connecting seat and the plurality of first covering layers are integrally formed and are made of plastic; the first transmission rod is made of metal.

[0015] In one embodiment, it is characterized in that the motor assembly further includes a second output end that can move back and forth, and the sealing assembly further has a second sealing hole spaced apart from the first sealing hole; the hair trimmer further includes a second transmission unit, the second transmission unit includes a second fixing seat and a second transmission rod arranged on the second fixing seat; the second transmission rod is located on the side of the sealing assembly away from the motor assembly; the second fixing seat is fixedly connected to the second output end, the second fixing seat passes through the second sealing hole, and the hole wall of the second sealing hole is tightly fitted with the second fixing seat.

[0016] In one embodiment, the second fixing seat includes a second base and a connecting column; the second base is fixedly connected to the second output end, one end of the connecting column is connected to the second base, and the other end is connected to the second transmission rod; the connecting column passes through and tightly fits the wall of the second sealing hole.

[0017] In one embodiment, the second transmission unit further includes a second covering layer, and the second covering layer is sleeved on the outer side of the second transmission rod.

[0018] In one embodiment, the number of the first transmission rods is greater than the number of the second transmission rods, and the weight of the second fixing base is greater than the weight of the first fixing base.

[0019] In one embodiment, the first base connected to the first fixed seat and the first output end is plate-shaped; the second base connected to the second fixed seat and the second output end includes a base plate and a counterweight plate connected to each other, the counterweight plate extends away from the second transmission rod, and the cross-sectional size of the base plate is larger than the cross-sectional size of the first base.

[0020] In one embodiment, the sealing assembly includes a mounting seat and a sealing member fixedly mounted on the mounting seat; the mounting seat has a first mounting hole and a second mounting hole, and the sealing member includes a first sealing portion and a second sealing portion, the first sealing portion is sealingly embedded in the first mounting hole, and the second sealing portion is sealingly embedded in the second mounting hole; the first sealing portion is provided with the first sealing hole, and the second sealing portion is provided with the second sealing hole.

[0021] In one embodiment, the first mounting hole is larger than the second mounting hole; a first inner cylinder wall extends from the periphery of the first sealing hole, and a second inner cylinder wall extends from the periphery of the second sealing hole, and the extension height of the second inner cylinder wall is greater than the extension height of the first inner cylinder wall.

[0022] In one embodiment, the outer circumferences of the first inner tube wall and the second inner tube wall are both provided with tightening members so that the first inner tube wall is tightly fitted and fixed to the first fixing seat, and the second inner tube wall is tightly fitted and fixed to the second fixing seat.

[0023] In one embodiment, the motor assembly includes a first motor and a second motor, the first motor has a first output end, the second motor has a second output end, and the movement directions of the first output end and the second output end are opposite.

[0024] In one embodiment, the mounting seat includes a base and a cover; the sealing member also includes a connecting piece connecting the first sealing part and the second sealing part, the connecting piece surrounds the outer periphery of the first sealing part and the second sealing part, and the connecting piece is pressed between the base and the cover.

[0025] The first transmission unit of the hair trimmer of this utility model connects multiple first transmission rods into a single unit by providing a connecting base, which is fixedly connected to the first fixing base. This ensures the stability of the connection of the first transmission rods while facilitating the assembly of multiple transmission rods. In addition, the first fixing base passes through the first sealing hole, and the hole wall of the first sealing hole and the first fixing base are tightly fitted together, which prevents the transmission rods from directly contacting the sealing element, thereby increasing the service life of the sealing element and ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1A schematic structural diagram of an embodiment of a hair trimmer of the present utility model is shown;

[0028] Figure 2 for Figure 1 Schematic diagram of the structure of the medium hair trimmer with the cutter head assembly removed;

[0029] Figure 3 for Figure 2 Assembly diagram of the motor assembly, sealing assembly, first transmission unit, and second transmission unit;

[0030] Figure 4 for Figure 3 Exploded view of the structure;

[0031] Figure 5 for Figure 3 A cross-sectional view of the structure at one angle;

[0032] Figure 6 This is a schematic diagram of the assembly of the sealing assembly, the first transmission unit, and the second transmission unit of the utility model;

[0033] Figure 7 for Figure 6 Bottom schematic diagram of the middle structure;

[0034] Figure 8 for Figure 6 A cross-sectional view of the structure at one angle;

[0035] Figure 9 for Figure 8 Front view of the middle structure;

[0036] Figure 10 for Figure 6 Exploded view of the structure;

[0037] Figure 11 This is a structural diagram of an embodiment of a sealing member of the present utility model;

[0038] Figure 12 This is a structural diagram of an embodiment of the second fixing seat of the utility model;

[0039] Figure 13 This is a structural diagram of an embodiment of the connecting seat of the utility model;

[0040] Figure 14 It is a structural schematic diagram of an embodiment of the first fixing seat of the utility model.

[0041] Description of Figure Numbers:

[0042] Label name Label name Label name 100 Motor components 264 Cover 323 Limiting part 110 First Motor 270 seals 324 Metal connectors 111 First output terminal 271 First sealing part 330 fastener 120 Second motor 272 Second sealing part 340 Sealing plug 121 Second output terminal 273 Connector 400 Second transmission unit 200 Sealing components 300 The first transmission unit 410 Second fixed seat 210 First sealing hole 310 Transmission components 411 Second base 220 Second sealing hole 311 cladding 412 substrate 230 First inner cylinder wall 312 Connector 413 weight plate 240 Second inner tube wall 313 Coordination Department 414 Connecting column 250 Fasteners 314 Mounting through-holes 415 Second transmission rod 260 Mounting Block 315 First transmission rod 420 Second coating layer 261 First mounting hole 320 First fixed seat 500 Cutting head assembly 262 Second mounting hole 321 First base 600 Main chassis 263 base 322 Connecting tube

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0045] It should be noted that if the embodiments of the present invention 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 status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0047] The utility model provides a hair trimmer.

[0048] In the embodiment of this utility model, please refer to Figures 1 to 9 The hair trimmer includes a motor assembly 100, a sealing assembly 200 and a first transmission unit 300; the motor assembly 100 has a first output end 111 that can move back and forth; the sealing assembly 200 has a first sealing hole 210; the first transmission unit 300 includes a transmission assembly 310 and a first fixing seat 320, the transmission assembly 310 is located on the side of the sealing assembly 200 away from the motor assembly 100, the transmission assembly 310 includes a connecting seat 312 and at least two first transmission rods 315 provided on the connecting seat 312, the connecting seat 312 is fixedly connected to the first fixing seat 320, the first fixing seat 320 is fixedly connected to the first output end 111, the first fixing seat 320 passes through the first sealing hole 210, and the hole wall of the first sealing hole 210 is tightly fitted with the first fixing seat 320.

[0049] In this embodiment, the hair trimmer can be specifically a shaver. The motor assembly 100 specifically includes a first motor 110, which has a first output terminal 111. Specifically, the first motor 110 can be a linear motor, so that the first output terminal 111 can move back and forth along a preset direction. The hair trimmer also includes a main housing 600, the upper end of which has an opening. The motor assembly 100 is installed in the main housing 600, and the sealing assembly 200 is installed at the opening of the main housing 600. The lower end of the first fixing base 320 is disposed in the main housing 600 and connected to the first output terminal 111. The upper end of the first fixing base 320 is sealed with a first sealing hole 210 and fixedly connected to the connecting base 312.

[0050] The first motor 110 specifically includes a stator assembly and a mover assembly. The mover assembly includes a permanent magnet and a connecting base. The permanent magnet is fixed to the connecting base, and the connecting base forms a first output terminal 111. The stator assembly includes an iron core, a winding frame, and a coil. The coil is wound on the winding frame and mounted on the iron core via the winding frame. The iron core can be a U-shaped iron core, an E-shaped iron core, or other types of iron cores. Different types of iron cores can be selected according to actual needs and are not specifically limited here. When alternating positive and negative currents are passed through the coil, the stator assembly forms an electromagnet. Through the magnetic induction effect between the electromagnet and the permanent magnet of the mover assembly, the mover assembly is driven to reciprocate in a preset direction. Specifically, the first fixing base 320 is fixedly connected to the connecting base of the stator assembly by screws. By connecting the multiple first transmission rods 315 to the multiple cutting heads of the cutter head assembly 500, the motor assembly 100 can drive the multiple cutting heads to move back and forth rapidly, thereby achieving synchronous hair cutting with multiple cutting heads.

[0051] The sealing assembly 200 specifically includes a sealing member 270 made of a flexible material such as rubber or silicone, with a first sealing hole 210 defined therein. The number of first transmission rods 315 can be selected and designed based on the number of blades required, and is not specifically limited herein. Multiple first transmission rods 315 can be connected together via a connecting base 312. This allows a single motor output to drive the multiple first transmission rods 315 in synchronous reciprocating motion, effectively reducing costs while meeting the requirements of multiple blades and miniaturizing the hair trimmer.

[0052] The first transmission unit 300 of the hair trimmer of the present invention connects multiple first transmission rods 315 into a single unit by providing a connecting base 312. This secures the connection of the transmission assembly 310 to the first fixing base 320, facilitating assembly of multiple transmission rods. Furthermore, the first fixing base 320 is provided with a first sealing hole 210, and the wall of the first sealing hole 210 fits tightly against the first fixing base 320, preventing the transmission rods from directly contacting the sealing member 270. This, in turn, increases the service life of the sealing member 270 and ensures a good sealing effect.

[0053] In one embodiment, if Figure 5 、 Figures 8 to 10 As shown, the first fixed seat 320 includes a first base 321 and a connecting tube 322 connected to each other; the first base 321 is fixedly connected to the first output end 111; the connecting tube 322 passes through the first sealing hole 210 and is tightly fitted and fixed to the hole wall of the first sealing hole 210; the connecting tube 322 and the connecting seat 312 are fixedly connected by a fastener 330.

[0054] In this embodiment, the first fixing base 320 can be made of plastic to reduce the weight of the first transmission unit 300. In other embodiments, the first transmission unit 300 can also be made of metal. To ensure structural strength, the first base 321 and the connecting tube 322 are integrally formed. The first base 321 can be plate-shaped and fixedly connected to the first output end 111 via screws, while the connecting tube 322 is connected to the plate surface of the first base 321. Specifically, a clamping ring can be provided around the outer periphery of the first sealing hole 210 to ensure a tight fit between the hole wall of the first sealing hole 210 and the connecting tube 322. Of course, the two can also be fixedly connected via secondary injection molding. The fastener 330 can be a screw. By fixing the connecting tube 322 and the connecting base 312 via the fastener 330, the connection between the two is stable and reliable, while also facilitating assembly and disassembly. This allows the connecting base 312 to be removed and replaced separately if it becomes worn, reducing maintenance costs.

[0055] Furthermore, the connection base 312 is spaced apart from the sealing assembly 200. That is, the end of the connection tube 322 facing away from the first base 321 extends upward to a position higher than the first sealing hole 210. When the connection base 312 is connected to the connection tube 322, the bottom surface of the connection base 312 is spaced apart from the upper surface of the sealing assembly 200. This prevents friction between the connection base 312 and the sealing assembly 200 and generates noise.

[0056] Furthermore, a metal connector 324 is fixedly embedded in the connecting tube 322 , and the fastener 330 passes through the connecting seat 312 and is fixedly connected to the metal connector 324 .

[0057] In this embodiment, the metal connector 324 can be made of stainless steel, aluminum alloy, copper and the like. The metal connector 324 can be columnar, such as a cylinder, a rectangular column and the like. The fastener 330 can be a screw, and a threaded hole is provided at the upper end of the metal connector 324, and the fastener 330 and the metal connector 324 are fixed by screw connection. The metal connector 324 and the connecting cylinder 322 can be fixedly connected by secondary injection molding. It is understandable that since the multiple first transmission rods 315 are connected to the connecting seat 312, the weight of the multiple cutter heads is concentrated on the connecting seat 312, and therefore the stress will be concentrated at the connection between the fastener 330 and the connecting seat 312 and the connecting cylinder 322. By arranging a metal connector 324 in the connecting tube 322, the fastener 330 is connected to the metal connector 324. Compared with the method of directly connecting the fastener 330 to the connecting tube 322, the structural strength of the connection of the fastener 330 can be improved, and structural damage causing connection failure can be avoided, making the connection between the connecting seat 312 and the first fixing seat 320 more stable and reliable, and increasing the service life.

[0058] For further information, please refer to Figures 8 to 10 、 Figure 13 and Figure 14 A limiting portion 323 is provided at one end of the connecting tube 322 away from the first base 321; a matching portion 313 is provided on the connecting seat 312 corresponding to the limiting portion 323. The limiting portion 323 and the matching portion 313 cooperate to limit the position in the direction around the axis of the connecting tube 322. The cooperation between the limiting portion 323 and the matching portion 313 can prevent the connecting seat 312 from rotating relative to the connecting tube 322, thereby preventing the fastener 330 from loosening from the metal connector 324 and the connecting seat 312, further improving the stability of the connection between the connecting seat 312 and the first fixed seat 320. In addition, the shaking of the cutter head caused by the rotation of the connecting seat 312 relative to the first fixed seat 320 can be prevented, thereby ensuring the use effect of the product. The limiting portion 323 and the matching portion 313 can have many structures, as long as they can limit the rotation of the connecting seat 312 relative to the connecting tube 322 around its axis after cooperation.

[0059] Furthermore, the limiting portion 323 is a limiting protrusion, and the matching portion 313 is a limiting groove. The cross-sectional shape of the limiting groove is non-circular, and the limiting protrusion is adapted to be installed in the limiting groove. In this way, the cooperation between the limiting portion 323 and the matching portion 313 can also provide pre-positioning for the installation of the connecting seat 312 and the connecting cylinder 322, thereby reducing the difficulty of assembly and improving assembly efficiency. By making the cross-sectional shape of the limiting groove non-circular, the limiting protrusion is embedded in the limiting groove to achieve circumferential limitation and prevent the two from rotating relative to each other. 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 elliptical, runway-shaped, special-shaped, etc. In other embodiments, the limiting portion 323 can also be a groove and the matching portion 313 can be a protrusion.

[0060] In one embodiment, please refer to Figures 8 to 10 The connecting base 312 is provided with a through-hole 314, through which the fastener 330 passes and is connected to the first fixing base 320. The first transmission unit 300 also includes a sealing plug 340, which is sealed against the end of the through-hole 314 away from the first output terminal 111. The sealing plug 340 may be a silicone plug, a rubber plug, or the like. Providing the through-hole 314 extending through the thickness of the connecting base 312 further facilitates the connection of the fastener 330. By providing the sealing plug 340 to seal the end of the through-hole 314 away from the first output terminal 111, hair can be effectively prevented from falling into the through-hole 314.

[0061] In one embodiment, if Figure 5 、 Figures 8 to 10 、 Figure 13 As shown, the transmission assembly 310 further includes a plurality of first coating layers 311, which are disposed one by one on the outside of the plurality of first transmission rods 315. The first coating layers 311 can be made of plastic or an elastic material. By coating each first transmission rod 315 with the first coating layer 311, friction noise between the first transmission rod 315 and the cutter head can be reduced.

[0062] Furthermore, the connecting seat 312 and the plurality of first covering layers 311 are integrally formed and are made of plastic material; the first transmission rod 315 is made of metal material.

[0063] In this embodiment, the plurality of first coating layers 311 and the connecting seat 312 are integrally formed to ensure the connection strength between the two. The connecting seat 312 and the plurality of first coating layers 311 are made of plastic material, which can reduce the friction noise between the first transmission rod 315 and the cutter head. The first transmission rod 315 made of metal can ensure structural strength. The first coating layer 311 is connected to the first transmission rod 315 by secondary injection molding, and the first coating layer 311 can be specifically connected to the outside of the first transmission rod 315 by injection molding in a laminating manner. By connecting the first transmission rod 315 to the first coating layer 311 by secondary injection molding, the surface accuracy of the first coating layer 311 can be ensured while improving the stability of the connection between the two.

[0064] In one embodiment, please refer to Figures 3 to 10The motor assembly 100 also includes a second output end 121 that can move back and forth, and the sealing assembly 200 also has a second sealing hole 220 spaced apart from the first sealing hole 210; the hair trimmer also includes a second transmission unit 400, the second transmission unit 400 includes a second fixing base 410 and a second transmission rod 415 provided on the second fixing base 410; the second transmission rod 410 is located on a side of the sealing assembly 200 away from the motor assembly 100; the second fixing base 410 is fixedly connected to the second output end 121, the second fixing base 410 passes through the second sealing hole 220, and the hole wall of the second sealing hole 220 is tightly fitted and fixed to the second fixing base 410.

[0065] In this embodiment, the motor assembly 100 specifically also includes a second motor 120, and the second motor 120 has a second output end 121. Specifically, the second motor 120 is a linear motor, so that the second output end 121 can move back and forth along a preset direction. The sealing assembly 200 also has a second sealing hole 220 spaced apart from the first sealing hole 210. In this way, the first transmission unit 300 and the second transmission unit 400 are sealed separately, which can ensure the sealing effect of each transmission unit. The number of second transmission rods 415 can be selected and designed according to the actual number of cutter heads required. For example, only one second transmission rod 415 can be provided. The second fixed seat 410 and the second output end 121 of the motor assembly 100 can be fixedly connected by screws or the like. The second fixed seat 410 is partially sealed to pass through the second sealing hole 220 and is fixedly connected to the second transmission rod 415, which can avoid direct contact between the transmission rod and the seal 270, thereby increasing the service life of the seal 270 and ensuring the sealing effect.

[0066] Furthermore, if Figure 5 、 Figures 8 to 10 、 Figure 12 As shown, the second fixed seat 410 includes a second base 411 and a connecting column 414; the second base 411 is fixedly connected to the second output end 121, one end of the connecting column 414 is connected to the second base 411, and the other end is connected to the second transmission rod 415; the connecting column 414 passes through and tightly fits the hole wall of the second sealing hole 220.

[0067] In this embodiment, in order to ensure structural strength, the second base 411, the connecting column 414 and the second transmission rod 415 are integrally formed and made of metal materials such as stainless steel, aluminum alloy, etc. The connecting column 414 is used to be sealed and embedded in the second sealing hole 220. Specifically, a tightening ring can be provided on the periphery of the second sealing hole 220 so that the hole wall of the second sealing hole 220 and the outer peripheral wall of the connecting column 414 are tightly fitted and fixed. Of course, the two can also be fixedly connected by secondary injection molding. In addition, when the number of cutter heads connected to the second transmission unit 400 is less than the number of cutter heads connected to the first transmission unit 300, due to the different load weights of the two, the whole machine will have a strong sense of vibration. By using a metal material for the second fixed base 410, the weight distributed on the first transmission unit 300 and the second transmission unit 400 can be balanced, which can effectively weaken the sense of vibration of the whole machine.

[0068] In other embodiments, the second transmission rod 415 can be made of a metal material such as stainless steel, and the second fixing base 410 can be made of plastic. The second transmission rod 415 and the connecting post 414 of the second fixing base 410 can be fixedly connected by secondary injection molding. By embedding the second transmission rod 415 within the connecting post 414, the connection between the second transmission rod 415 and the second fixing base 410 can be reliable and cost-effective.

[0069] Furthermore, the second transmission unit 400 includes a second coating 420, which is sleeved onto the outer side of the second transmission rod 415. The second coating 420 can be made of plastic or an elastic material. By coating the second coating 420 onto the second transmission rod 415, friction noise between the second transmission rod 415 and the cutter head can be reduced.

[0070] In one embodiment, please refer to Figures 5 to 10 、 Figure 12 , the number of first transmission rods 315 is greater than the number of second transmission rods 415, and the weight of the second fixed seat 410 is greater than the weight of the first fixed seat 320. When the number of cutting heads is an odd number, the number of transmission rods on the first transmission unit 300 and the second transmission unit 400 is unbalanced. Since the first transmission unit 300 has a transmission assembly 310, the number of transmission rods can be set to be greater. However, when the number of cutting heads connected to the first transmission unit 300 and the second transmission unit 400 is unbalanced, it will cause the whole machine to have a strong sense of vibration. By making the weight of the second fixed seat 410 greater than the weight of the first fixed seat 320, the weight distributed on the first transmission unit 300 and the second transmission unit 400 can be balanced, thereby effectively weakening the sense of vibration of the whole machine.

[0071] Further, please refer again to Figures 5 to 10 、 Figure 12The first base 321 connected to the first fixed seat 320 and the first output end 111 is plate-shaped; the second base 411 connected to the second fixed seat 410 and the second output end 121 includes a base plate 412 and a counterweight plate 413 connected to each other, and the counterweight plate 413 extends away from the second transmission rod 415, and the cross-sectional dimension of the base plate 412 is larger than the cross-sectional dimension of the first base 321.

[0072] In this embodiment, the first base 321 of the first fixing base 320 is plate-shaped, which further facilitates the connection between the first fixing base 320 and the first output end 111. The counterweight plate 413 can be connected to the periphery of the base plate 412 adjacent to the second output end 121. Specifically, the counterweight plate 413 is disposed between the first output end 111 and the second output end 121. It will be appreciated that, due to the limited space within the hair trimmer housing, and the fact that the first and second output ends 111, 121 are typically arranged side by side, with the first and second output ends 111, 121 being substantially equidistant from the sealing assembly 200, if the base plate 412 of the second fixing base 410 is thicker than the first base 321 to increase its weight, space within the housing would be wasted. By providing a counterweight plate 413 extending away from the second transmission rod 415 and making the cross-sectional dimensions of the base plate 412 larger than the cross-sectional dimensions of the first base 321, the weight of the second fixed base 410 is increased compared to the weight of the first fixed base 320. This fully utilizes the space between the first output end 111 and the second output end 121, as well as the lateral space within the housing, making the overall structure more compact and more conducive to miniaturization. In other embodiments, a counterweight block may be provided on the second base 411 of the second fixed base 410, or the thickness of the second base 411 of the second fixed base 410 may be greater than the thickness of the first base 321 of the first fixed base 320, so that the weight of the second fixed base 410 is greater than the weight of the first fixed base 320.

[0073] Specifically, if Figures 5 to 11 As shown, the sealing assembly 200 includes a mounting seat 260 and a sealing member 270 fixedly mounted on the mounting seat 260; the mounting seat 260 has a first mounting hole 261 and a second mounting hole 262, and the sealing member 270 includes a first sealing portion 271 and a second sealing portion 272 connected to each other, the first sealing portion 271 is sealingly embedded in the first mounting hole 261, and the second sealing portion 272 is sealingly embedded in the second mounting hole 262; a first sealing hole 210 is provided on the first sealing portion 271, and a second sealing hole 220 is provided on the second sealing portion 272.

[0074] In this embodiment, the sealing member 270 can be fixedly connected to the mounting base 260 by embedding, bonding, or other methods. During assembly, the sealing member 270 is first fixed to the mounting base 260, and then the mounting base 260 is installed on the main housing 260. By providing the mounting base 260 to install the sealing member 270, the assembly and disassembly of the sealing member 270 can be simplified.

[0075] Furthermore, the first mounting hole 261 is larger than the second mounting hole 262; a first inner cylinder wall 230 extends from the periphery of the first sealing hole 210, and a second inner cylinder wall 240 extends from the periphery of the second sealing hole 220, and the extension height of the second inner cylinder wall 240 is greater than the extension height of the first inner cylinder wall 230.

[0076] In this embodiment, because the first transmission unit 300 includes a transmission assembly 310, the first mounting hole 261 needs to be larger than the second mounting hole 262. Since the first mounting hole 261 is larger than the second mounting hole 262, the transverse dimensions of the first sealing portion 271 and the second sealing portion 272 are larger. This allows the first sealing portion 271 to have a multi-pleated structure to ensure the required deformation for the reciprocating movement of the first transmission rod 315. Since the second sealing portion 272 has a smaller transverse dimension, by making the second inner cylinder portion extend longer than the first inner cylinder portion, the second sealing portion 272 can be increased in the longitudinal direction, thereby ensuring the required deformation for the reciprocating movement of the second transmission rod 415. This ensures that the sealing and deformation requirements of the seal 270 are met while making the overall structure more compact and reducing the overall size of the device. Specifically, the second inner cylinder wall 240 extends away from the second output end 121 to the top wall of the protruding mounting seat 260. In order to prevent the second inner cylinder wall 240 from interfering with the connecting seat 312 , specifically, the first inner cylinder wall 230 is extended downward away from the connecting seat 312 .

[0077] In one embodiment, please refer to Figure 4 、 Figure 5 、 Figures 8 to 10 The outer peripheries of the first inner cylinder wall 230 and the second inner cylinder wall 240 are each provided with a tightening member 250, so that the first inner cylinder wall 230 is tightly fitted and fixed to the first fixing seat 320, and the second inner cylinder wall 240 is tightly fitted and fixed to the second fixing seat 410. The tightening member 250 can specifically be a tightening spring, a tightening sleeve, etc. By providing the tightening member 250 on the outer peripheries of the first inner cylinder wall 230 and the second inner cylinder wall 240, the first inner cylinder wall 230 can be tightly fitted to the first fixing seat 320, and the second inner cylinder wall 240 can be tightly fitted to the second fixing seat 410, without generating a gap between the inner cylinder walls and the fixing seats, thereby improving the sealing effect of the sealing member 270 on the first fixing seat 320 and the second fixing seat 410.

[0078] In one embodiment, if Figures 3 to 10As shown, the first sealing portion 271 and the second sealing portion 272 are connected, and the motor assembly 100 includes a first motor 110 and a second motor 120. The first motor 110 has a first output end 111, and the second motor 120 has a second output end 121. The movement directions of the first output end 111 and the second output end 121 are opposite.

[0079] In this embodiment, the first motor 110 and the second motor 120 are specifically linear motors to drive the first output terminal 111 and the second output terminal 121 to reciprocate and reversely along a preset direction. The specific structure of the first motor 110 and the second motor 120 can refer to the existing design and is not specifically limited here. The movement directions of the first output terminal 111 of the first motor 110 and the second output terminal 121 of the second motor 120 are opposite, which can offset the rotational inertia generated when the two move, thereby weakening the vibration of the whole machine. The first sealing part 271 is connected to the second sealing part 272, that is, the first sealing part 271 and the second sealing part 272 are connected as a whole, rather than two independent parts. In this way, the vibration transmitted from the first output terminal 111 and the second output terminal 121 to the first sealing part 271 and the second sealing part 272 can be partially offset and absorbed, further weakening the vibration of the whole machine.

[0080] In other embodiments, the first motor 110 and the second motor 120 may also be rotary motors, and the first output end 111 and the second output end 121 may reciprocate and reversely move in a preset direction through conversion devices that convert rotary motion into linear motion.

[0081] Furthermore, the mounting base 260 includes a base 263 and a cover plate 264. The sealing member 270 also includes a connecting piece 273 connecting the first sealing portion 271 and the second sealing portion 272. The connecting piece 273 surrounds the outer periphery of the first and second sealing portions 271, 272 and is pressed between the base 263 and the cover plate 264. The base 263 and the cover plate 264 can be fixedly connected by screws or other means. The outer peripheries of the first and second sealing portions 271, 272 are both connected by the connecting piece 273, which ensures the strength of the connection between the two and prevents long-term deformation and breakage. The outer peripheries of the first and second sealing portions 271, 272 are fixed to the mounting base 260 by the connecting piece 273, which increases the fixing area of ​​the sealing member 270 and the mounting base 260, ensuring sealing reliability and improving the stability of the connection. The connecting piece 273 is pressed between the bottom cover and the cover plate 264, which further facilitates the assembly and disassembly of the sealing member 270 and the mounting base 260.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hair trimmer, characterized in that: include: a motor assembly having a first output end that is reciprocatable; a sealing assembly having a first sealing hole; The first transmission unit includes a transmission assembly and a first fixed seat; the transmission assembly is located on the side of the sealing assembly away from the motor assembly, the transmission assembly includes a connecting seat and at least two first transmission rods arranged on the connecting seat, the connecting seat is fixedly connected to the first fixed seat; the first fixed seat is fixedly connected to the first output end, the first fixed seat passes through the first sealing hole, and the hole wall of the first sealing hole is tightly fitted with the first fixed seat.

2. The hair trimmer according to claim 1, wherein The first fixing seat includes a first base and a connecting tube that are connected to each other; the first base is fixedly connected to the first output end; the connecting tube passes through the first sealing hole and is tightly fitted and fixed to the hole wall of the first sealing hole; the connecting tube and the connecting seat are fixedly connected by fasteners.

3. The hair trimmer according to claim 2, wherein: A metal connector is fixedly embedded in the connecting cylinder, and the fastener passes through the connecting seat and is fixedly connected to the metal connector.

4. The hair trimmer according to claim 2, wherein: A limiting portion is provided at one end of the connecting tube away from the first base; the connecting seat is provided with a matching portion corresponding to the limiting portion, and the limiting portion and the matching portion are matched to limit the position in the direction around the axis of the connecting tube.

5. The hair trimmer according to claim 2, wherein: The connecting seat is provided with a through mounting hole, the fastener passes through the mounting hole and is fixedly connected to the connecting tube; the first transmission unit also includes a sealing plug, which is sealingly installed at a port of the mounting hole away from the first output end.

6. The hair trimmer according to claim 1, wherein: The transmission assembly further includes a plurality of first covering layers, and the plurality of first covering layers are sleeved on the outer sides of the plurality of first transmission rods in a one-to-one correspondence.

7. The hair trimmer according to claim 6, wherein: The connecting seat and the first covering layers are integrally formed and are made of plastic; the first transmission rod is made of metal.

8. The hair trimmer according to any one of claims 1 to 7, characterized in that The motor assembly also includes a second output end that can move back and forth, and the sealing assembly also has a second sealing hole spaced apart from the first sealing hole; the hair trimmer also includes a second transmission unit, which includes a second fixing seat and a second transmission rod arranged on the second fixing seat; the second transmission rod is located on a side of the sealing assembly facing away from the motor assembly; the second fixing seat is fixedly connected to the second output end, the second fixing seat passes through the second sealing hole, and the hole wall of the second sealing hole is tightly fitted with the second fixing seat.

9. The hair trimmer according to claim 8, wherein The second fixing seat includes a second base and a connecting column; the second base is fixedly connected to the second output end, one end of the connecting column is connected to the second base, and the other end is connected to the second transmission rod; the connecting column passes through and tightly fits the wall of the second sealing hole.

10. The hair trimmer according to claim 9, wherein The second transmission unit further includes a second covering layer, and the second covering layer is sleeved on the outer side of the second transmission rod.

11. The hair trimmer according to claim 8, wherein The number of the first transmission rods is greater than the number of the second transmission rods, and the weight of the second fixing seat is greater than the weight of the first fixing seat.

12. The hair trimmer according to claim 11, wherein The first base connected to the first fixed seat and the first output end is plate-shaped; the second base connected to the second fixed seat and the second output end includes a base plate and a counterweight plate connected to each other, the counterweight plate extends away from the second transmission rod, and the cross-sectional size of the base plate is larger than the cross-sectional size of the first base.

13. The hair trimmer according to claim 8, wherein The sealing assembly includes a mounting seat and a sealing member fixedly mounted on the mounting seat; the mounting seat has a first mounting hole and a second mounting hole, the sealing member includes a first sealing portion and a second sealing portion, the first sealing portion is sealingly embedded in the first mounting hole, and the second sealing portion is sealingly embedded in the second mounting hole; the first sealing portion is provided with the first sealing hole, and the second sealing portion is provided with the second sealing hole.

14. The hair trimmer according to claim 13, wherein The first mounting hole is larger than the second mounting hole; a first inner cylinder wall extends from the periphery of the first sealing hole, a second inner cylinder wall extends from the periphery of the second sealing hole, and an extension height of the second inner cylinder wall is greater than an extension height of the first inner cylinder wall.

15. The hair trimmer according to claim 14, wherein The outer peripheries of the first inner tube wall and the second inner tube wall are both provided with tightening pieces so that the first inner tube wall is tightly fitted and fixed to the first fixing seat, and the second inner tube wall is tightly fitted and fixed to the second fixing seat.

16. The hair trimmer according to claim 13, wherein The motor assembly includes a first motor and a second motor. The first motor has a first output end, and the second motor has a second output end. The movement directions of the first output end and the second output end are opposite.

17. The hair trimmer according to claim 13, wherein The mounting seat includes a base and a cover plate; the sealing member also includes a connecting piece connecting the first sealing part and the second sealing part, the connecting piece surrounds the outer periphery of the first sealing part and the second sealing part, and the connecting piece is pressed between the base and the cover plate.

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