Hair trimmer

Abstract

The embodiment of the invention discloses a hair trimmer which comprises a first movement unit, a second movement unit and a driving mechanism. The first movement unit comprises a first tool bit assembly and a first transmission assembly, and the first transmission assembly is in transmission connection with the driving mechanism and the first tool bit assembly; the second movement unit comprises a second tool bit assembly and a second transmission assembly, and the second transmission assembly is in transmission connection with the driving mechanism and the second tool bit assembly; the first tool bit assembly comprises at least two first tool bits, the second tool bit assembly comprises at least one second tool bit, and the number of the first tool bits is larger than that of the second tool bits; the mass of the first transmission assembly is smaller than that of the second transmission assembly. According to the hair trimmer, the mass of the first transmission assembly is smaller than that of the second transmission assembly, so that the mass difference of the two movement units is reduced, mechanical unbalance and vibration caused by single-side overweight are avoided, vibration can be effectively reduced, and the comfort level of a user when the user uses the hair trimmer is improved.

Description

TECHNICAL FIELD

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

[0002] A multi-clipper has multiple clip heads, which can effectively expand the trimming area and is suitable for various trimming scenarios, such as trimming long hair and short hair at the same time. However, when multiple clip heads are driven synchronously, a large vibration amplitude will reduce the comfort when a user holds the trimmer.

[0003] The prior art usually adopts two transmission assemblies to connect two clip head assemblies with the same mass and move them in opposite directions to reduce vibration. However, when the number of clip heads is odd or the masses of the clip heads are different, the mass difference between the clip head assemblies connected by the two transmission assemblies is large, and strong vibration will still be generated.

[0004] 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

[0005] In view of the above problems, the present application provides a hair trimmer, which aims to solve the technical problem that strong vibration will still be generated when the number of clip heads is odd or the masses of the clip heads are different.

[0006] To achieve the above-mentioned purpose, the hair trimmer provided by the present application comprises a first movement unit, a second movement unit and a driving mechanism, wherein,

[0007] The first movement unit comprises a first clip head assembly and a first transmission assembly, and the first transmission assembly is transmissionally connected to the driving mechanism and the first clip head assembly; the second movement unit comprises a second clip head assembly and a second transmission assembly, and the second transmission assembly is transmissionally connected to the driving mechanism and the second clip head assembly;

[0008] The first clip head assembly comprises at least two first clip heads, and the second clip head assembly comprises at least one second clip head, and the number of the first clip heads is greater than the number of the second clip heads.

[0009] The mass of the first transmission assembly is less than the mass of the second transmission assembly.

[0010] In an embodiment, the driving mechanism comprises a first moving member and a second moving member, the first transmission assembly is connected to the first moving member, and the second transmission assembly is connected to the second moving member.

[0011] In an embodiment, the mass of the first moving member is less than the mass of the second moving member.

[0012] In an embodiment, the first moving member comprises a first mounting frame and a first permanent magnet arranged on the first mounting frame, and the first transmission assembly is fixedly connected to the first mounting frame.

[0013] The second moving member comprises a second mounting frame and a second permanent magnet arranged on the second mounting frame, and the second transmission assembly is fixedly connected to the second mounting frame.

[0014] In an embodiment, the mass of the first mounting frame is less than the mass of the second mounting frame.

[0015] In an embodiment, the first mounting frame comprises a first mounting block fixedly connected to the first transmission assembly, and the second mounting frame comprises a second mounting block fixedly connected to the second transmission assembly, and the thickness of the second mounting block is greater than the thickness of the first mounting block.

[0016] In an embodiment, the first transmission assembly comprises a first transmission seat and at least two first transmission rods connected to the first transmission seat, and the first transmission seat is connected to the first mounting frame, and each of the first transmission rods is connected to the first cutter head.

[0017] The second transmission assembly comprises a second transmission seat and at least one second transmission rod connected to the second transmission seat, and the second transmission seat is connected to the second mounting frame, and each of the second transmission rods is connected to the second cutter head.

[0018] In an embodiment, the mass of the first transmission seat is less than the mass of the second transmission seat, or the total mass of the first transmission seat and the first moving member is less than the total mass of the second transmission seat and the second moving member.

[0019] In an embodiment, the first transmission seat comprises a first bottom plate fixedly connected to the first mounting frame, and the second transmission seat comprises a second bottom plate and a counterweight wall protruding from the second bottom plate, and the second bottom plate is fixedly connected to the second mounting frame, and the counterweight wall is located on the side wall of the second mounting frame, and the mass of the first transmission seat is less than the mass of the second transmission seat.

[0020] In an embodiment, the second transmission seat comprises two counterweight walls, and the two counterweight walls are located on opposite sides of the second mounting frame.

[0021] In an embodiment, the two counterweight walls comprise a first wall and a second wall, the first wall is located on one side of the second mounting frame close to the first mounting frame, and the second wall is located on the other side of the second mounting frame, and the thickness of the first wall is greater than the thickness of the second wall.

[0022] In an embodiment, the first bottom plate has a thickness smaller than that of the second bottom plate.

[0023] In an embodiment, the first mounting frame comprises a first mounting block and two mounting protrusions protruding from the first mounting block near a wall surface of the first bottom plate, and the wall surface of the first bottom plate near the first mounting frame is formed with two clearance spaces adapted to the mounting protrusions; the wall surface of the first bottom plate away from the first mounting frame is formed with two connecting protrusions corresponding to the clearance spaces.

[0024] The first movement unit further comprises a fastener penetrating through the connecting protrusions and the mounting protrusions to fix the first transmission seat and the first mounting frame.

[0025] In an embodiment, the first tool head assembly and the second tool head assembly are arranged side by side.

[0026] The first transmission assembly and the second transmission assembly reciprocate along a preset direction, and the first transmission assembly and the second transmission assembly move in opposite directions.

[0027] In an embodiment, the at least two first tool heads comprise a long bristle tool head and a first short bristle tool head, and the at least one second tool head comprises a second short bristle tool head, and the long bristle tool head is arranged between the first short bristle tool head and the second short bristle tool head.

[0028] In an embodiment, the first tool head comprises a first moving cutter and a first static cutter covering the first moving cutter, and the second tool head comprises a second moving cutter and a second static cutter covering the second moving cutter.

[0029] The first moving cutter is drivingly connected to the first transmission assembly to make the first moving cutter reciprocate along the preset direction relative to the first static cutter.

[0030] The second moving cutter is drivingly connected to the second transmission assembly to make the second moving cutter reciprocate along the preset direction relative to the second static cutter.

[0031] The stroke of the first moving cutter is smaller than that of the second moving cutter, and the deviation of the movement frequency of the first moving cutter and the second moving cutter is less than or equal to 5%.

[0032] The hair trimmer can adapt to different trimming requirements and can trim long hair and short hair at the same time. Meanwhile, the multiple cutter heads can expand the trimming area, thereby improving the trimming efficiency. Secondly, the number of the first cutter heads is greater than the number of the second cutter heads, so that the mass of the first cutter head assembly is greater than the mass of the second cutter head assembly. The mass of the first transmission assembly is less than the mass of the second transmission assembly, so as to reduce the mass difference between the first motion unit and the second motion unit, balance the pushing force in the system, avoid mechanical imbalance and vibration caused by one side being too heavy, effectively reduce vibration, and improve the comfort of the user when using the hair trimmer.

[0033] In addition, the counterweight balance of the first motion unit and the second motion unit is realized by optimizing the mass of the first transmission assembly and the second transmission assembly. The counterweight balance of the two can be realized only by one-time design and adjustment, which reduces the independent adjustment and maintenance work of each cutter head and reduces the complexity of system design and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Fig. 1 The structure schematic diagram of an embodiment of the hair trimmer is shown;

[0036] Fig. 2 For Fig. 1 The structure explosion diagram of the hair trimmer;

[0037] Fig. 3 For Fig. 1 Another structure explosion diagram of the hair trimmer;

[0038] Fig. 4 For Fig. 1 The sectional view of the hair trimmer;

[0039] Fig. 5 For Fig. 4 The explosion diagram of the hair trimmer;

[0040] Fig. 6 For Fig. 3 The structure schematic diagram of the first transmission assembly and the first motion part;

[0041] Fig. 7 For Fig. 3Structure diagram of the second transmission assembly and the second moving element.

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] Reference Name Reference Name Reference Name 100 Hair trimmer 200 First movement unit 210 First cutting head assembly 211 First cutting head 220 First drive assembly 224 First drive seat 225 First bottom plate 225a Avoidance space 226 First drive rod 227 Connecting protrusion 227a Connecting groove 228 Fastener 300 Second movement unit 310 Second cutting head assembly 311 Second cutting head 320 Second drive assembly 324 Second drive seat 325 Second bottom plate 326 Counterweight wall 327 First wall 328 Second wall 329 Second drive rod 400 Driving mechanism 410 First driving member 420 Second driving member 430 First moving member 431 First mounting bracket 432 First permanent magnet 433 First mounting block 434 Mounting protrusion 440 Second moving member 441 Second mounting bracket 442 Second permanent magnet 443 Second mounting block 444 Mounting lug

[0044] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. 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 in the present application, all the 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 in each embodiment can be combined with each other, but the combination 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 also not within the protection scope of the present application.

[0046] 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.

[0047] 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 are satisfied at the same time.

[0048] The present application provides a hair trimmer 100, which can be an electric shaver, a hair clipper, etc.

[0049] In the embodiments of the present application, please refer to Figs. 1 to 7The hair trimmer 100 comprises a first motion unit 200, a second motion unit 300 and a driving mechanism 400; wherein the first motion unit 200 comprises a first cutter head assembly 210 and a first transmission assembly 220, the first transmission assembly 220 being transmissionally connected to the driving mechanism 400 and the first cutter head assembly 210; the second motion unit 300 comprises a second cutter head assembly 310 and a second transmission assembly 320, the second transmission assembly 320 being transmissionally connected to the driving mechanism 400 and the second cutter head assembly 310; the first cutter head assembly 210 comprises at least two first cutter heads 211, the second cutter head assembly 310 comprises at least one second cutter head 311, the number of the first cutter heads 211 is greater than the number of the second cutter heads 311; the mass of the first transmission assembly 220 is less than the mass of the second transmission assembly 320.

[0050] In the embodiment, the driving mechanism 400 comprises but is not limited to a linear motor and its mover, the driving mechanism 400 is used to provide driving force to drive the first motion unit 200 and the second motion unit 300 to move, wherein the first motion unit 200 and the second motion unit 300 respectively comprise the first cutter head assembly 210 and the second cutter head assembly 310 for fitting the skin and trimming the hair, the first cutter head assembly 210 comprises two first cutter heads 211, which can be suitable for trimming long hair and short hair, the second cutter head assembly 310 comprises one second cutter head 311, which can be suitable for trimming short hair or long hair. In other embodiments, the first cutter head assembly 210 can also comprise three, four or more first cutter heads 211, and the second cutter head assembly 310 can also comprise two, three or more second cutter heads 311 to meet different trimming needs.

[0051] The first transmission assembly 220 and the second transmission assembly 320 are used to connect the mover of the driving mechanism 400 respectively to drive the first cutter head assembly 210 and the second cutter head assembly 310 to move, to act as a transmission bridge. The first transmission assembly 220 can comprise a transmission shaft, and the second transmission assembly 320 can comprise a transmission shaft and a counterweight, so that the mass of the first transmission assembly 220 and the second transmission assembly 320 matches the first cutter head assembly 210 and the second cutter head assembly 310, the setting of the counterweight can effectively reduce the difficulty of counterbalance, for example, if the mass of the first cutter head assembly 210 exceeds that of the second cutter head assembly 310, a counterweight of corresponding mass can be added to the second transmission assembly 320 to realize the counterbalance of the first motion unit 200 and the second motion unit 300.

[0052] The hair trimmer 100 of the present invention, by setting a first blade assembly 210 including at least two first blades 211 and a second blade assembly 310 including at least one second blade 311, allows the hair trimmer 100 to adapt to different trimming needs and can trim both long and short hair simultaneously. Simultaneously, the multiple blades expand the trimming area, thereby improving trimming efficiency. Furthermore, since the number of first blades 211 is greater than the number of second blades 311, the mass of the first blade assembly 210 is greater than the mass of the second blade assembly 310. The hair trimmer 100 of the present invention reduces the mass difference between the first motion unit 200 and the second motion unit 300 by setting the mass of the first transmission assembly 220 to be less than the mass of the second transmission assembly 320, thereby balancing the driving force in the system, avoiding mechanical imbalance and vibration caused by excessive weight on one side, effectively reducing vibration, improving user comfort when using the hair trimmer 100, and reducing noise.

[0053] Furthermore, by optimizing the mass of the first transmission assembly 220 and the second transmission assembly 320, the counterweight balance between the first motion unit 200 and the second motion unit 300 can be achieved. This requires only a one-time design and adjustment, reducing the need for independent adjustment and maintenance of each cutter head and lowering the complexity of system design and maintenance. For example, the first cutter head 211 and the second cutter head 311 can be mass-produced, ensuring consistency and improving production efficiency. If, as needed, at least two first cutter heads 211 are set in the first cutter head assembly 210 and at least one second cutter head 311 is set in the second cutter head assembly 310, the counterweight balance between the first motion unit 200 and the second motion unit 300 can be achieved simply by calculating the total mass of the first cutter head assembly 210 and the second cutter head assembly 310, and then calculating and designing the mass of the first transmission assembly 220 and the second transmission assembly 320. Moreover, the cutting head usually needs to consider multiple functions, such as cutting and adjustment. Achieving counterweight balance on the first cutting head assembly 210 and the second cutting head assembly 310 will increase the design difficulty and complexity. The design of the transmission assembly is relatively simple, and achieving counterweight balance on it can reduce the design difficulty.

[0054] In one embodiment, reference Figs. 3 to 7 The drive mechanism 400 includes a first moving part 430 and a second moving part 440, a first transmission assembly 220 connected to the first moving part 430, and a second transmission assembly 320 connected to the second moving part 440.

[0055] In this embodiment, the drive mechanism 400 further includes a drive assembly for driving the first moving member 430 and the first moving member 440. The drive assembly can be a single drive member that simultaneously drives both the first moving member 430 and the first moving member 440, or it can be two drive members that drive the first moving member 430 and the first moving member 440 respectively, with the two drive members corresponding to the first moving member 430 and the first moving member 440 respectively. The first moving member 430 and the second moving member 440 serve as movers of the drive mechanism 400, and include, but are not limited to, permanent magnets. The drive assembly includes a coil for generating a changing electromagnetic field when energized, thereby causing the first moving member 430 and the second moving member 440 to move. The first moving member 430 is connected to the first transmission assembly 220 to drive the first cutter head assembly 210 to move, and the second moving member 440 is connected to the second transmission assembly 320 to drive the second cutter head assembly 310 to move.

[0056] Furthermore, the mass of the first moving component 430 is less than the mass of the second moving component 440. This embodiment balances the first and second moving components 430 by counterweighting the first and second moving components 440, based on the fact that the mass of the first transmission assembly 220 is less than the mass of the second transmission assembly 320. This involves counterweighting the mover of the drive mechanism 400, increasing the number of counterweighting methods. If adjusting the limits of the masses of the first and second transmission assemblies 220 and 320 still does not achieve the ideal balance, the masses of the first and second moving components 430 and 440 can be further adjusted, avoiding the limitation of a single method that results in a large mass difference between different loads on the drive components. Secondly, the mover structure of the drive mechanism 400 is relatively simple, and its mass distribution is easy to adjust; achieving counterweight balance on it reduces design difficulty.

[0057] Specifically, the first moving component 430 includes a first mounting frame 431 and a first permanent magnet 432 disposed on the first mounting frame 431, and the first transmission assembly 220 is fixedly connected to the first mounting frame 431; the second moving component 440 includes a second mounting frame 441 and a second permanent magnet 442 disposed on the second mounting frame 441, and the second transmission assembly 320 is fixedly connected to the second mounting frame 441. In this embodiment, the first permanent magnet 432 and the second permanent magnet 442 can be fixedly mounted on the first mounting frame 431 and the second mounting frame 441 respectively by adhesive, snap-fit ​​or other means, so as to reciprocate under the action of the changing electromagnetic field generated by the driving assembly, thereby driving the first cutter head assembly 210 and the second cutter head assembly 310 to perform trimming actions.

[0058] In this design, the mass of the first mounting bracket 431 is less than the mass of the second mounting bracket 441. The first mounting bracket 431 and the second mounting bracket 441 can be made of the same or different materials. To reduce the difficulty of counterweighting the first mounting bracket 431 and the second mounting bracket 441, they are usually made of the same material. The mass of the first mounting bracket 431 is made less than the mass of the second mounting bracket 441 by changing the dimensions of the first mounting bracket 431 and the second mounting bracket 441. When the first mounting bracket 431 and the second mounting bracket 441 have the same dimensions but different materials, the first mounting bracket 431 can be made of a lightweight material, such as aluminum alloy; the second mounting bracket 441 can be made of a heavier material, such as steel or copper, to achieve the same result.

[0059] Since the mass of a permanent magnet is typically closely related to its magnetic properties, adjusting the mass on the mounting frame avoids altering the magnet's structure and materials, thus maintaining its original magnetic field strength and uniformity. This ensures that the electromagnetic performance of the drive mechanism 400 is not adversely affected by the counterweight adjustment, guaranteeing drive efficiency and system stability. Secondly, the structure of the mounting frame is usually relatively simple and can utilize various materials and structural designs. Therefore, mass adjustment on the mounting frame offers greater flexibility. For example, the mass can be easily adjusted by selecting different materials or adding counterweights, without involving the complex manufacturing process of the permanent magnet. This flexibility makes counterweight adjustment more convenient and faster, reducing design and manufacturing complexity.

[0060] Furthermore, the first mounting bracket 431 includes a first mounting block 433 fixedly connected to the first transmission assembly 220, and the second mounting bracket 441 includes a second mounting block 443 fixedly connected to the second transmission assembly 320, wherein the thickness of the second mounting block 443 is greater than the thickness of the first mounting block 433.

[0061] In this embodiment, the first mounting block 433 and the second mounting block 443 may have the same shape or different shape. In order to control the quality of the first mounting block 433 and the second mounting block 443 more accurately and efficiently, the first mounting block 433 and the second mounting block 443 with the same shape are usually used.

[0062] This embodiment achieves a more precise control over mass difference by altering the thickness of the first mounting block 433 and the second mounting block 443, making the mass of the first mounting bracket 431 less than that of the second mounting bracket 441. Fine-tuning the thickness allows for small increases or decreases in mass, whereas changing the material can lead to significant mass variations that are difficult to control precisely. Secondly, thickness adjustment does not require additional materials or complex processes, effectively controlling manufacturing costs. For example, changing the thickness typically only requires adjusting the material cutting or forming process, while changing the material may require redesigning molds or processes, increasing manufacturing complexity. Furthermore, adjusting mass by changing the thickness allows for mass differences to be achieved while maintaining material strength and rigidity, whereas changing the material may affect the structural strength and rigidity of the component.

[0063] In one embodiment, the first transmission assembly 220 includes a first transmission seat 224 and at least two first transmission rods 226 connected to the first transmission seat 224. The first transmission seat 224 is connected to a first mounting bracket 431, and each first transmission rod 226 is connected to a first cutter head 211. The second transmission assembly 320 includes a second transmission seat 324 and at least one second transmission rod 329 connected to the second transmission seat 324. The second transmission seat 324 is connected to a second mounting bracket 441, and each second transmission rod 329 is connected to a second cutter head 311. The mass of the first transmission assembly 220 is less than the mass of the second transmission assembly 320.

[0064] In this embodiment, there are two first transmission rods 226 and one second transmission rod 329. The first transmission assembly 220 also includes a first connecting seat, wherein one of the first transmission rods 226 and the first transmission seat 224 are integrally formed, and the other first transmission rods 226 are disposed on the first connecting seat. The first connecting seat is then sleeved on the first transmission rods 226 integrally formed with the first transmission seat 224, so that at least two first transmission rods 226 are arranged side by side with intervals. This arrangement allows the first transmission rods 226 to provide stronger and more stable support for the first cutter head 211, thereby enabling the multiple first cutter heads 211 to operate smoothly. The first connecting seat and the other first transmission rods 226 can be made of plastic to reduce weight. To reduce the total mass of the first transmission rod 226 and the first connecting seat, and the mass difference between the second transmission rod 329 and the first transmission assembly 320, the second transmission assembly 320 includes a second connecting seat. One of the second transmission rods 329 is integrally formed with the second transmission seat 324, and the second connecting seat is sleeved on the second transmission rod 329 integrally formed with the second transmission seat 324. If there are two or more second transmission rods 329, the other second transmission rods 329 can be set on the second connecting seat. The second connecting seat and the other second transmission rods 329 can also be made of plastic to reduce mass. In other embodiments, multiple integrally formed transmission rods for connecting the cutter head can be used, or other transmission rod arrangement methods can be used, which will not be elaborated here.

[0065] In this embodiment, the first transmission rod 226 and the second transmission rod 329 can be configured to have the same mass, and the mass of the first transmission seat 224 can be less than the mass of the second transmission seat 324; alternatively, the first transmission seat 224 and the second transmission seat 324 can be configured to have the same mass, and the mass of the first transmission rod 226 can be less than the mass of the second transmission rod 329; alternatively, the masses of the first transmission seat 224 and the second transmission seat 324 can be different, and the masses of the first transmission rod 226 and the second transmission rod 329 can also be different, as long as the total mass of the first transmission seat 224 and the first transmission rod 226 is less than the total mass of the second transmission seat 324 and the second transmission rod 329. For example, since the number of first transmission rods 226 is greater than the number of second transmission rods 329, if the same material is used, the mass of at least two first transmission rods 226 may be greater than the mass of at least one second transmission rod 329. In this case, the mass of the first transmission seat 224 can be reduced so that the mass of the first transmission assembly 220 is greater than the mass of the second transmission assembly 320. This method makes the counterweight design more flexible.

[0066] Specifically, the mass of the first transmission seat 224 is less than the mass of the second transmission seat 324, or the total mass of the first transmission seat 224 and the first moving part 430 is less than the total mass of the second transmission seat 324 and the second moving part 440.

[0067] In this embodiment, by setting the mass of the first transmission seat 224 to be less than the mass of the second transmission seat 324, the mass of the first transmission component 220 is less than the mass of the second transmission component 320, making the counterweighting simpler and more precise. Since the number of the two sets of transmission rods is different, if the counterweight is balanced on the transmission rods, the structural and material issues need to be considered, which makes the design more complicated and is not conducive to improving production efficiency.

[0068] Secondly, there are several ways to implement the condition that the total mass of the first transmission seat 224 and the first moving component 430 is less than the total mass of the second transmission seat 324 and the second moving component 440. For example, when the masses of the first transmission seat 224 and the second transmission seat 324 are the same, the mass of the first moving component 430 is less than the mass of the second moving component 440; when the mass of the first transmission seat 224 is less than the mass of the second transmission seat 324, the mass of the first moving component 430 and the mass of the second moving component 440 can be the same or different; when the mass of the first transmission seat 224 is greater than the mass of the second transmission seat 324, the mass of the first moving component 430 is less than the mass of the second moving component 440. This approach makes the counterweight design more flexible, allowing for counterweight balance to be achieved through multiple components, thus avoiding damage to the load-bearing components caused by excessive weight of a single component.

[0069] Specifically, the first transmission seat 224 includes a first base plate 225 connected to the first mounting bracket 431, and the second transmission seat 324 includes a second base plate 325 and a counterweight wall 326 protruding from the second base plate 325. The second base plate 325 is fixedly connected to the second mounting bracket 441, and the counterweight wall 326 is located on the side wall of the second mounting bracket 441. The mass of the first transmission seat 224 is less than the mass of the second transmission seat 324.

[0070] In this embodiment, the first base plate 225 and the second base plate 325 can be square, circular, or other shapes. The mass of the first base plate 225 and the second base plate 325 can be the same or different, and there is no limitation. Compared with the first transmission seat 224, the second transmission seat 324 also includes a counterweight wall 326, so that the mass of the first transmission seat 224 is less than the mass of the second transmission seat 324, thereby making the mass of the first transmission assembly 220 less than the mass of the second transmission assembly 320, so as to reduce the vibration of the first motion unit 200 and the second motion unit 300. One or more counterweight walls 326 can be provided. When there is one counterweight wall 326, the counterweight wall 326 can be located on the side wall of the second mounting bracket 441 near the first mounting bracket 431. In this way, the weight of the counterweight wall 326 can be applied to the middle of the hair trimmer 100, reducing vibration and preventing the second transmission assembly 320 from being subjected to unbalanced force and increasing vibration when the weight of the counterweight wall 326 is applied to the side wall, thereby generating noise.

[0071] When multiple counterweight walls 326 are provided, each counterweight wall 326 can be located on the side wall of the second mounting bracket 441, allowing the counterweight walls 326 to have a larger volume and greater mass. This reduces the mass difference between the first motion unit 200 and the second motion unit 300, thereby reducing vibration. By reducing vibration, the user's comfort when using the equipment is greatly improved, the grip is more stable, and fatigue is less likely to occur.

[0072] Furthermore, the second transmission seat 324 includes two counterweight walls 326, which are located on opposite sides of the second mounting bracket 441.

[0073] In this embodiment, compared to the first transmission seat 224, the second transmission seat 324 further includes two counterweight walls 326, allowing for a wider range of adjustable mass. The two counterweight walls 326 can be located on any opposite sides of the second mounting bracket 441, without limitation. The masses of the two counterweight walls 326 can be the same or different. When the masses of the two counterweight walls 326 are the same, their symmetrical design on opposite sides of the second mounting bracket 441 helps to evenly distribute the weight, thereby maintaining the overall structural balance and reducing the generation of eccentric forces. Furthermore, the symmetrical distribution of the counterweight walls 326 can better balance the forces on the second transmission assembly 320, avoiding structural instability caused by excessive force on one side.

[0074] When the two counterweights 326 have different masses, the counterweight 326 with the larger mass can be placed on the side wall of the second mounting bracket 441 near the first mounting bracket 431, so that the main weight of the counterweight 326 is applied to the middle of the hair trimmer 100, thereby making the overall center of gravity more concentrated. The position closer to the center can better balance the force and avoid the tilting problem caused by the main weight of the counterweight 326 being applied to the side of the hair trimmer 100.

[0075] Furthermore, the second mounting block 443 is elongated, and the two counterweight walls 326 are located on opposite sides of the second mounting block 443 in its width direction.

[0076] In this embodiment, the two counterweight walls 326 are located on opposite sides of the second mounting block 443 in its width direction, and the length of the counterweight walls 326 can be the same as the length of the second mounting block 443. When a certain weight needs to be achieved, compared to placing the two counterweight walls 326 on opposite sides of the length direction of the second mounting block 443, the counterweight walls 326 in this embodiment are smaller in height, avoiding excessive height of the counterweight walls 326 from compressing the space of other components, thereby ensuring that other components have sufficient installation and operating space. The arrangement of this embodiment makes the structure of the hair trimmer 100 more compact.

[0077] Furthermore, the two counterweight walls 326 include a first wall 327 and a second wall 328. The first wall 327 is located on the side of the second mounting block 443 near the first mounting bracket 431, and the second wall 328 is located on the opposite side of the second mounting block 443. The thickness of the first wall 327 is greater than the thickness of the second wall 328, so that the mass of the first wall 327 is greater than the mass of the second wall 328.

[0078] In this embodiment, increasing the mass of the first wall 327 by increasing its thickness, rather than increasing its height, maintains the overall structural compactness and prevents the counterweight wall 326 from being too tall and encroaching on the space of other components, thus facilitating internal layout and design optimization. Secondly, placing the first wall 327 with a larger mass near the center of the device (close to the first mounting bracket 431) not only helps maintain the device's center of gravity balance and reduces eccentric forces, thus minimizing vibration, but also places the thicker first wall 327 closer to the center of the device, rather than near its edge, which helps reduce the volume of the hair trimmer 100. Since placing the main components of the hair trimmer 100 in the middle of the device provides better protection, placing the first wall 327 at the edge would increase the lateral volume of the device, resulting in a larger overall volume of the hair trimmer 100.

[0079] In one embodiment, the thickness of the first base plate 225 is less than the thickness of the second base plate 325, so that the mass of the first base plate 225 is less than the mass of the second base plate 325.

[0080] In this embodiment, instead of increasing the width to increase the mass of the second base plate 325, increasing the thickness of the second base plate 325 to make its mass greater than that of the first base plate 225 maintains the compactness of the overall structure, avoids the base plate occupying too much lateral space, and thus leaves more space for the arrangement and installation of other components. Secondly, increasing the thickness to increase the mass makes the center of gravity more concentrated and stable, reducing the problem of center of gravity shift caused by the increase in width. In addition, a thicker base plate has higher bending resistance, providing better support and stability during operation, improving the overall strength of the base plate, enhancing its impact resistance and fatigue resistance, and extending its service life.

[0081] In one embodiment, the first mounting bracket 431 includes a first mounting block 433 and two mounting protrusions 434 protruding from the wall surface of the first mounting block 433 near the first base plate 225. The wall surface of the first base plate 225 near the first mounting bracket 431 forms a clearance space 225 that is adapted to the mounting protrusions 434. The wall surface of the first base plate 225 away from the clearance space 225 is provided with two connecting protrusions 227, which are provided corresponding to the clearance space 225. The first motion unit 200 also includes a fastener 228, which passes through the connecting protrusions 227 and the mounting protrusions 434 to fix the first transmission seat 224 and the first mounting bracket 431.

[0082] In this embodiment, the fastener 228 can be a bolt. Furthermore, the connecting protrusion 227 and the wall surface of the first base plate 225 facing away from the clearance space 225 form a connecting groove 227, which is used to accommodate the bolt head. The mounting protrusion 434 and the connecting protrusion 227 enhance the local structural strength, increase the connection thickness between the first mounting seat and the first mounting block 433, and ensure a more stable connection between the first transmission seat 224 and the first mounting block 433. Through multi-point fixing of the two mounting protrusions 434 to the first base plate 225, the strength and stability of the connection are further improved, avoiding loosening and instability that may result from a single-point connection. Secondly, the mounting protrusion 434 and the clearance space 225 provide a clear positioning and installation area, improving installation accuracy and assembly efficiency, while also preventing slippage between components and ensuring stability during operation.

[0083] Furthermore, the second mounting block 443 is provided with mounting lugs 444 at opposite ends in its length direction, and two counterweight walls 326 are provided on opposite sides of the second mounting block 443 that avoid the mounting lugs 444.

[0084] In this embodiment, the mounting lug 444 can be used to connect the elastic support component of the second moving component 440, such as a spring sheet. It is understood that the first mounting block 433 also has mounting lugs at opposite ends along its length to connect the elastic support component of the first moving component 430. For example, in the drive mechanism 400, the drive component and the moving component are connected by a spring sheet. The mounting lug 444 connected to the spring sheet enables the second moving component 430 to reciprocate along a preset direction and reduces the vibration of the drive mechanism 400. By avoiding the mounting lug 444 and setting the counterweight wall 326, interference between the counterweight wall 326 and the mounting lug 444 and other components can be avoided, optimizing the use of internal space and making the structure of the hair trimmer 100 more compact. Secondly, avoiding the mounting lug 444 and setting the counterweight wall 326 simplifies the manufacturing process, reduces complexity, and improves manufacturing precision and efficiency. Moreover, during installation, the counterweight wall 326 and the mounting lug 444 will not interfere with each other, simplifying the assembly process and improving assembly efficiency and reliability.

[0085] In one embodiment, the first cutter head assembly 210 and the second cutter head assembly 310 are arranged side by side; the first transmission assembly 220 and the second transmission assembly 320 reciprocate along a preset direction, and the first transmission assembly 220 and the second transmission assembly 320 move in opposite directions.

[0086] In this embodiment, the first transmission component 220 and the second transmission component 320 reciprocate in opposite directions along a preset direction. This design allows the vibrations generated by the movement of the two transmission components to cancel each other out, reducing vibration during operation and thus reducing noise, providing a quieter operating environment for the user. Secondly, the first blade assembly 210 and the second blade assembly 310 are arranged side-by-side, enabling the simultaneous processing of more hair and improving trimming efficiency. The side-by-side blades can cover a larger trimming area, further enhancing trimming efficiency.

[0087] Further, please refer to Fig. 3 and Fig. 5 The drive mechanism 400 also includes a first drive member 410 and a second drive member 420, which are arranged side by side with a gap between them. A first moving member 430 and a second moving member 440 are arranged side by side with a gap between them, respectively. The first drive member 410 corresponds to the first moving member 430, and the second drive member 420 corresponds to the second moving member 440.

[0088] In this embodiment, the first drive element 410 and the second drive element 420 each include a coil. After being energized, the first drive element 410 and the second drive element 420 generate a changing electromagnetic field. The first moving element 430 and the second moving element 440 reciprocate under the influence of the electromagnetic fields of the first drive element 410 and the second drive element 420, respectively. Compared to a single-drive system, a dual-drive system can provide higher overall power output because each drive element can provide independent driving capability. Each drive element is responsible for driving one transmission component, which can distribute power more efficiently and avoid overburdening a single drive element, thereby improving the overall operating efficiency of the device. Secondly, the dual-drive system allows the vibrations of the first moving element 430 and the second moving element 440 to cancel each other out, reducing the overall vibration of the device. This design helps to provide a smoother operating experience and reduce user fatigue. Furthermore, the dual-drive system allows for independent control and adjustment of the two transmission components. This enables the trimmer to be adjusted under different trimming modes or conditions, allowing the hair trimmer 100 to provide optimal performance and results in various scenarios. In addition, single-drive systems typically require complex transmission mechanisms to simultaneously drive multiple transmission components, potentially increasing system complexity and failure rate. Dual-drive systems simplify the overall design by connecting each drive component individually to its corresponding transmission assembly. Maintenance and replacement of each drive component are relatively independent, reducing repair difficulty and overall system maintenance costs.

[0089] In one embodiment, at least two first cutter heads 211 include a long-bearded cutter head (not shown) and a first short-bearded cutter head (not shown), and at least one second cutter head 311 includes a second short-bearded cutter head (not shown), with the long-bearded cutter head disposed between the first short-bearded cutter head and the second short-bearded cutter head.

[0090] In this embodiment, the long-handled trimmer head is used to trim longer hairs to a medium or shorter length, preparing them for further trimming by the short-handled trimmer head. The short-handled trimmer head is used to trim shorter hairs. Positioning the long-handled trimmer head between the two short-handled trimmer heads facilitates simultaneous processing of both long and short hairs, improving trimming efficiency. For example, the long-handled trimmer head first cuts the longer hairs, followed by more precise trimming by the short-handled trimmer heads on either side. Furthermore, this arrangement allows for close contact with the jawline for effective shaving, making it more convenient to use.

[0091] In one embodiment, the first cutter head 211 includes a first moving cutter (not shown) and a first stationary cutter (not shown) covering the first moving cutter; the second cutter head 311 includes a second moving cutter (not shown) and a second stationary cutter (not shown) covering the second moving cutter; the first moving cutter is driven to the first transmission assembly 220 so that the first moving cutter reciprocates relative to the first stationary cutter in a preset direction; the second moving cutter is driven to the second transmission assembly 320 so that the second moving cutter reciprocates relative to the second stationary cutter in a preset direction; the stroke of the first moving cutter is less than the stroke of the second moving cutter, and the deviation of the movement frequencies of the first moving cutter and the second moving cutter is less than or equal to 5%.

[0092] In this embodiment, the moving blade reciprocates relative to the stationary blade in a preset direction to cut hair. The stroke refers to the maximum distance the moving blade travels in a single direction. The number of first blades 211 in the first blade assembly 210 is greater than the number of second blades 311 in the second blade assembly 310, resulting in greater vibration from the first moving blade in the first blade assembly 210, thus causing greater noise. Since the movement frequencies of the first and second moving blades are almost the same, and the stroke of the first moving blade is less than that of the second moving blade, the movement speed of the first moving blade is less than that of the second moving blade. Therefore, the total distance traveled by the first moving blade per unit time is shorter than that of the second moving blade. In other words, the total contact area between the multiple first moving blades and the first stationary blade in the first blade assembly is reduced. A smaller contact area means a smaller friction area between the moving blade and the stationary blade, thereby reducing friction and thus reducing mechanical vibration and noise caused by friction.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 this application.

Claims

1. A hair trimmer, characterized in that, It includes a first motion unit, a second motion unit, and a drive mechanism; wherein, The first motion unit includes a first cutter head assembly and a first transmission assembly, the first transmission assembly being tractively connected to the drive mechanism and the first cutter head assembly; the second motion unit includes a second cutter head assembly and a second transmission assembly, the second transmission assembly being tractively connected to the drive mechanism and the second cutter head assembly; The first cutter head assembly includes at least two first cutters, and the second cutter head assembly includes at least one second cutter head, wherein the number of first cutters is greater than the number of second cutters; The mass of the first transmission component is less than the mass of the second transmission component.

2. The hair trimmer as described in claim 1, characterized in that, The drive mechanism includes a first moving component and a second moving component, wherein the first transmission component is connected to the first moving component and the second transmission component is connected to the second moving component.

3. The hair trimmer as described in claim 2, characterized in that, The mass of the first moving part is less than the mass of the second moving part.

4. The hair trimmer as described in claim 2, characterized in that, The first moving component includes a first mounting frame and a first permanent magnet disposed on the first mounting frame, and the first transmission assembly is fixedly connected to the first mounting frame; The second moving component includes a second mounting bracket and a second permanent magnet disposed on the second mounting bracket, and the second transmission assembly is fixedly connected to the second mounting bracket.

5. The hair trimmer as described in claim 4, characterized in that, The mass of the first mounting bracket is less than the mass of the second mounting bracket.

6. The hair trimmer as described in claim 5, characterized in that, The first mounting bracket includes a first mounting block fixedly connected to the first transmission assembly, and the second mounting bracket includes a second mounting block fixedly connected to the second transmission assembly, wherein the thickness of the second mounting block is greater than the thickness of the first mounting block.

7. The hair trimmer as described in claim 4, characterized in that, The first transmission assembly includes a first transmission seat and at least two first transmission rods connected to the first transmission seat. The first transmission seat is connected to the first mounting bracket, and each of the first transmission rods is connected to the first cutter head. The second transmission assembly includes a second transmission seat and at least one second transmission rod connected to the second transmission seat. The second transmission seat is connected to the second mounting bracket, and each of the second transmission rods is connected to the second cutter head connection.

8. The hair trimmer as described in claim 7, characterized in that, The mass of the first transmission seat is less than the mass of the second transmission seat, or the total mass of the first transmission seat and the first moving part is less than the total mass of the second transmission seat and the second moving part.

9. The hair trimmer as described in claim 8, characterized in that, The first transmission seat includes a first base plate fixedly connected to the first mounting frame, the second transmission seat includes a second base plate and a counterweight wall protruding from the second base plate, the second base plate is fixedly connected to the second mounting frame, the counterweight wall is located on the side wall of the second mounting frame, and the mass of the first transmission seat is less than the mass of the second transmission seat.

10. The hair trimmer as claimed in claim 9, characterized in that, The second transmission base includes two counterweight walls, which are located on opposite sides of the second mounting frame.

11. The hair trimmer as claimed in claim 10, characterized in that, The two counterweight walls include a first wall and a second wall. The first wall is located on the side of the second mounting bracket closer to the first mounting bracket, and the second wall is located on the opposite side of the second mounting bracket. The thickness of the first wall is greater than the thickness of the second wall.

12. The hair trimmer as claimed in claim 9, characterized in that, The thickness of the first base plate is less than the thickness of the second base plate.

13. The hair trimmer as described in claim 9, characterized in that, The first mounting bracket includes a first mounting block and two mounting protrusions protruding from the wall surface of the first mounting block near the first base plate. The wall surface of the first base plate near the first mounting bracket has a clearance space adapted to the mounting protrusions. The wall surface of the first base plate away from the first mounting bracket has two connecting protrusions, which are provided corresponding to the clearance space. The first motion unit further includes a fastener that passes through the connecting protrusion and the mounting protrusion to fix the first transmission seat and the first mounting bracket.

14. The hair trimmer as claimed in any one of claims 1 to 13, characterized in that, The first cutter head assembly and the second cutter head assembly are arranged side by side; The first transmission component and the second transmission component reciprocate along a preset direction, and the first transmission component and the second transmission component move in opposite directions.

15. The hair trimmer as claimed in claim 14, characterized in that, The at least two first cutting heads include a long-bearded cutting head and a first short-bearded cutting head, and the at least one second cutting head includes a second short-bearded cutting head, with the long-bearded cutting head disposed between the first short-bearded cutting head and the second short-bearded cutting head.

16. The hair trimmer as claimed in claim 14, characterized in that, The first cutter head includes a first moving cutter and a first stationary cutter covering the first moving cutter; the second cutter head includes a second moving cutter and a second stationary cutter covering the second moving cutter. The first moving blade is connected to the first transmission assembly so that the first moving blade reciprocates relative to the first stationary blade in the preset direction. The second moving blade is connected to the second transmission assembly so that the second moving blade reciprocates relative to the second stationary blade in the preset direction; The stroke of the first moving cutter is less than the stroke of the second moving cutter, and the deviation of the movement frequency between the first moving cutter and the second moving cutter is less than or equal to 5%.

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