Hair clipper

Abstract

The utility model relates to the technical field of hair clippers, in particular to a hair clipper, which comprises a tool bit, a motor and a transmission component for converting rotary motion of the motor into reciprocating motion of the tool bit, the transmission component comprises an eccentric wheel, a connecting seat and a linkage shaft, and the eccentric wheel is driven by the motor and is rotatably connected with one end of the connecting seat. The other end of the connecting base is rotationally connected with the movable cutter head through a linkage shaft, an elastic tensioning piece is arranged between the cutter head and the connecting base and / or between the connecting base and the eccentric wheel, and the problem of vibration noise when an existing hair clipper is used is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hair clippers, in particular to a hair clipper. Background Art

[0002] Hair clippers, as a commonly used electric tool in life, mostly use motors as the power part of the cutter head. The cutter head is generally divided into a fixed cutter head fixedly connected to the casing and a movable cutter head slidably arranged on one side of the movable cutter head. For example, the existing hair clippers have application number: 202020627349.9, entitled: A horizontal motion cutter head device and a hair clipper, and the Chinese patent application, in which the motor directly drives the movable cutter head through an eccentric wheel. The disadvantage is that it vibrates greatly during transmission and generates noise due to vibration, which results in a poor user experience. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a motor and a hair clipper thereof, which solves the problem of vibration and noise of the existing hair clippers during use.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a hair clipper, including a cutter head, a motor and a transmission assembly that converts the rotational motion of the motor into reciprocating motion of the cutter head, the transmission assembly including an eccentric wheel, a connecting seat and a linkage shaft, the eccentric wheel is driven by the motor and is rotatably connected to one end of the connecting seat, the other end of the connecting seat is rotatably connected to the movable cutter head through the linkage shaft, and an elastic tensioning member is provided between the cutter head and the connecting seat and / or between the connecting seat and the eccentric wheel.

[0005] Furthermore, the connecting seat is respectively provided with a first connecting hole cooperating with the eccentric wheel and a second connecting hole cooperating with the linkage shaft. The eccentric wheel is provided with an eccentric shaft, which is correspondingly rotatably connected in the first connecting hole.

[0006] By adopting the above technical solution, the first connecting hole facilitates the rotational connection between the connecting seat and the eccentric wheel, and the corresponding setting of the second connecting hole facilitates the connection between the connecting seat and the cutter head.

[0007] Furthermore, the hair clipper includes a housing for accommodating the motor and the transmission assembly, the housing is assembled inside the housing, and the cutter head includes a fixed cutter head fixedly connected to the housing and a movable cutter head slidably arranged on one side of the fixed cutter head.

[0008] By adopting the above technical solution, the casing makes it convenient for users to hold the hair clipper, and the casing is set to facilitate the integration of the motor and transmission mechanism in the casing, thereby forming a separate module to facilitate the production and assembly of subsequent products.

[0009] Furthermore, the movable cutter head is linearly slidably arranged in the housing through a cutter head sliding mechanism, and the end of the linkage shaft away from the eccentric wheel is plugged into the movable cutter head.

[0010] By adopting the above technical solution, the cutter head sliding mechanism can easily limit the movement direction of the cutter head, so that the movable cutter head can maintain linearity during movement.

[0011] Furthermore, the cutter head sliding mechanism includes a guide rail provided on the shell and a sliding member sliding axially along the guide rail. The sliding member is fixed with a swing shaft, which is connected to the movable cutter head. The end of the linkage shaft away from the connecting seat is connected to the sliding member.

[0012] By adopting the above technical solution, the swing shaft and the movable cutter head are plugged in, which facilitates the convenient disassembly, assembly and maintenance of the movable cutter head and the sliding member.

[0013] Furthermore, the elastic tensioning member includes a spring, a compression spring or an elastic belt arranged between the sliding member and the connecting seat.

[0014] By adopting the above technical solution, the spring, compression spring or elastic belt can keep the connecting seat and the sliding member in a tensioned state at all times, thereby reducing the active clearance during relative movement between the sliding member and the connecting seat, thereby reducing the generation of vibration and noise and improving transmission accuracy. Correspondingly, when an elastic tensioning member is provided between the connecting seat and the eccentric wheel, it can reduce the vibration and noise between the eccentric wheel and the connecting seat during operation.

[0015] Furthermore, the elastic tensioning member is correspondingly sleeved on the outside of the linkage shaft.

[0016] By adopting the above technical solution, the elastic tensioner is sleeved on the outside of the linkage shaft, which helps to reduce the internal space of the shell occupied by the elastic tensioner and thus optimize the product volume.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. In the present invention, after the motor drives the connecting seat to move through the eccentric wheel, the motion is transmitted to the cutter head through the connecting seat. In this way, the connecting seat, as an intermediate link, can provide a buffering effect between the eccentric wheel and the movable cutter head, thereby reducing the direct friction and wear between the cutter head and the eccentric wheel, and at the same time making the cutter head move relatively smoothly during the reciprocating motion, which helps to reduce mechanical noise.

[0019] 2. In this embodiment, by adding a connecting seat design, the distribution of torque can be better controlled to avoid the motor-driven eccentric wheel directly acting on the movable cutter head, resulting in excessive concentration of force and damage to the cutter head.

[0020] 3. In this embodiment, the provision of the elastic tensioning member can effectively maintain constant tension between the connecting seat and the cutter head and / or between the connecting seat and the eccentric wheel, thereby avoiding the presence of gaps between adjacent components, which would otherwise cause vibration and noise due to the presence of active gaps between components during the movement of the motor, thereby effectively improving the product's shock and noise reduction effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the sliding assembly and reciprocating drive mechanism of the utility model.

[0022] Figure 2 It is a schematic diagram of the overall structure of the cutter head sliding mechanism and the reciprocating drive mechanism of the utility model.

[0023] Figure 3 For this utility model Figure 2 Structural cross-section.

[0024] Figure 4 This is a schematic diagram of the rotor structure of the utility model.

[0025] Figure 5 This is a schematic diagram of the transmission assembly and motor structure of the utility model.

[0026] Figure 6 This is a structural diagram of a hair clipper of the present utility model.

[0027] Figure 7 This is a structural diagram of a hair clipper of the present utility model.

[0028] Figure 8 This is an exploded view of the motor of this utility model.

[0029] Figure 9 This is a schematic diagram of the rotor shell structure of the utility model.

[0030] In the picture:

[0031] 100 transmission assembly, 110 eccentric wheel, 111 eccentric shaft, 120 connecting seat, 1201 first connecting hole, 1202 second connecting hole, 121 linkage shaft, 130 elastic tensioning member;

[0032] 200 motor, 210 coil, 220 magnet, 230 rotor housing, 231 fan blade, 232 through hole, 233 centrifugal fan blade, 240 motor output shaft, 250 first bearing, 260 bracket, 2601 mounting groove, 261 spacer rod, 262 bottom ring;

[0033] 300 sliding member, 310 main body, 311 connecting arm, 320 reciprocating shaft, 330 guide rail, 340 spherical bushing, 350 elastic preload member, 351 contact portion, 352 elastic portion;

[0034] 410 first housing, 411 heat dissipation holes, 412 heat dissipation fins, 420 second housing, 421 sliding holes, 422 partitions, 423 stator barrel, 430 mounting frame;

[0035] 500 dust cover;

[0036] 600 housing, 610 cutter head, 611 fixed cutter head, 612 movable cutter head, 6121 connecting piece, 6121a shaft hole. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0038] Reference Figure 1 、 2 3. The existing hair clipper mainly consists of a housing 600, a shell, a cutter head 610, a sliding assembly and a reciprocating drive mechanism. After the sliding assembly and the reciprocating drive mechanism are assembled inside the shell, the entire shell is mounted on the shell 600. The cutter head 610 includes a movable cutter head 612 and a fixed cutter head 611. The fixed cutter head 611 is fixedly connected to the shell 600. The movable cutter head 612 is set on one side of the cutter head 611. The reciprocating drive mechanism drives the movable cutter head 612 to reciprocate through the sliding assembly to trim the hair.

[0039] In this embodiment, the sliding assembly includes a sliding member 300 and at least two guide rails 330 arranged in parallel and connected to the sliding member 300 to limit the sliding direction of the sliding member 300. The guide rails 330 are mounted on the housing. The movable cutter head 612 is connected to the sliding member 300 to drive the movable cutter head 612 to reciprocate when the sliding member 300 reciprocates along the axial direction of the guide rails 330. The provision of at least two guide rails 330 has the following effects compared to the prior art and the solution of a single guide rail 330:

[0040] First, the provision of at least two guide rails 330 can significantly improve the stability of the movable cutter head 612 when the sliding member 300 drives the movable cutter head 612 to move, reduce shaking and sliding deviation, and thus reduce vibration and noise during use of the hair clipper.

[0041] Second, the sliding member 300 is guided and limited by multiple guide rails 330, which can disperse the load, so that the force of the reciprocating drive mechanism when driving the movable cutter head 612 to slide back and forth through the sliding member 300 is more evenly distributed among the various components, rather than acting on a single point of action on the movable cutter head 612 or the sliding member 300, effectively reducing the movement wear between the guide rails 330 and the sliding member 300. Since the wear is more evenly distributed, the cost and frequency of replacing the guide rails 330 or the sliding member 300 will be reduced, thereby effectively extending the product service life, reducing product maintenance requirements, and improving product stability and durability.

[0042] 3. By guiding the sliding member 300 to move the movable cutter head 612 through two or more guide rails 330, more precise linear movement of the sliding member 300 can be achieved, which helps to avoid excessive shearing or uneven cutting of hair by the movable cutter head 612 when shaving due to abnormal swinging of the sliding member 300. At the same time, it also ensures the stability and cutting precision of the movable cutter head 612 during operation, improves the safety of use, reduces irritation and discomfort to the skin during shaving, and improves the user experience.

[0043] In this embodiment, the parallel arrangement of the guide rails 330 facilitates the connection between a single sliding member 300 and multiple guide rails 330 . At the same time, maintaining parallelism or near parallelism after parallel arrangement also facilitates guiding the sliding member 300 to slide in the axial direction of the guide rail 330 .

[0044] In this embodiment, refer to Figure 1 The sliding member 300 includes a main body 310 and a connecting arm 311 provided on the main body 310 for connecting to the guide rail 330. The number of the connecting arms 311 corresponds to the number of the guide rails 330, so as to facilitate the connection of the sliding member 300 to multiple guide rails 330. The main body 310 is used to connect the movable cutter head 612, and the reciprocating drive mechanism drives the movable cutter head 612 to cut hair after the reciprocating motion.

[0045] In this embodiment, the connecting arm 311 can be integrally formed with the main body 310, or the two can be detachably connected, such as by screwing, snapping, bonding or other detachable connection methods, which will not be described in detail here.

[0046] In this embodiment, multiple guide rails 330 may be provided, which may be two, three, or more. However, due to the volume limitation of the hair clipper product, two guide rails 330 are preferably used in this embodiment. The following example also takes two guide rails 330 and two corresponding connecting arms 311 as an example to illustrate the following embodiment.

[0047] Reference Figure 1 , as a first embodiment of the axial reciprocating movement of the sliding member 300 along the guide rail 330, (refer to Figure 1 and 3 ), its connecting arm 311 can be fixedly connected to the guide rail 330, and the guide rail 330 slides on the shell, thereby also realizing the axial reciprocating movement of the sliding member 300 along the guide rail 330. Specifically, a sliding hole 421 can be opened on the shell, and the guide rail 330 is movably set in the sliding hole 421. This method has the following effects.

[0048] 1. Since the connecting arm 311 is fixedly connected to the guide rail 330, the structure of the two is simpler, the number of product parts is reduced, and the product structure is optimized;

[0049] Second, the guide rail 330 is rigidly connected to the connecting arm 311. When the main body 310 of the sliding member 300 is driven by the reciprocating drive mechanism to move back and forth, the structural strength between the connecting arm 311 and the guide rail 330 is greater, and maintenance is relatively convenient. At the same time, the force points of sliding wear are transferred from the traditional direct wear between the connecting arm 311 and the guide rail 330 to the force wear between the guide rail 330 and the shell. This not only evenly distributes the force points, making the sliding member 300 more evenly stressed during the reciprocating movement, but also correspondingly disperses the force wear points, so that the wear of the product during long-term use is relatively reduced, effectively improving the durability, stability and reliability of the product, and is particularly suitable for products that do not require frequent adjustment, such as hair clippers.

[0050] As a second embodiment of the sliding member 300 moving back and forth along the axial direction of the guide rail 330: its connecting arm 311 can be slidably connected to the guide rail 330, that is, a through hole 232 is opened at the lower end of the connecting arm 311, and both ends of the guide rail 330 are fixed on the shell, and the corresponding guide rail 330 is movably arranged in the through hole 232. When the reciprocating drive mechanism drives the sliding member 300 to move, its connecting arm 311 slides back and forth in the axial direction of the guide rail 330.

[0051] Based on the above embodiment, preferably, the two guide rails 330 are arranged in parallel. The parallel arrangement is to ensure that the slider 300 can slide smoothly and stably along the axial direction of the guide rail 330. Of course, due to the relatively small size of the actual hair clipper, the sliding stroke of the slider 300 on the guide rail 330 is limited. It can be imagined that the two guide rails 330 can also be arranged nearly in parallel, that is, there may be a small angular deviation between the two guide rails 330, and the sliding of the slider 300 can also be achieved. Preferably, the angle between the two guide rails 330 is between 0° and 2° to ensure the normal reciprocating motion of the slider 300.

[0052] In the second embodiment based on the axial reciprocating movement of the sliding member 300 along the guide rail 330, there can be sliding friction or rolling friction between the guide rail 330 and the connecting arm 311. The sliding friction two can be connected by a sliding sleeve, and the rolling friction two can be provided with a ball bearing between them to reduce the contact friction when the two move relative to each other.

[0053] Regarding the first embodiment in which the sliding member 300 reciprocates along the axial direction of the guide rail 330 , the guide rail 330 and the sliding hole 421 of the housing may also adopt sliding friction or rolling friction to achieve corresponding effects.

[0054] For the sake of clarity, in the following embodiments, the various embodiments are described based on the structure of the first embodiment in which the sliding member 300 reciprocates along the axial direction of the guide rail 330 .

[0055] In order to avoid the two guide rails 330 from getting stuck when sliding in the sliding hole 421, to ensure that the sliding part 300 can slide stably, and at the same time keep the two connecting arms 311 on the main body 310 and the two guide rails 330 in a tensioned state to reduce the vibration and noise of the sliding part 300 during movement, in this embodiment, one of the two swing arms is rigidly connected to the guide rail 330, and the other is elastically connected to the guide rail 330. In this way, the elastic deformation of the elastic connecting arm 311 is used to compensate for the non-parallel dimensional deviation of the two slide rails, which can avoid the system from getting stuck, and can keep the sliding block and the sliding rod in a tensioned state at all times, which has the effect of shock absorption and noise reduction, and the product is quieter and more stable when running.

[0056] Based on the above embodiment, in order to reduce the influence of error factors such as assembly reasons, surface roughness or bending deformation of the guide rail 330 on the guiding accuracy of the guide rail 330, so as to improve the stability and reliability of the sliding member 300 when driving the movable cutter head 612 to move back and forth, a spherical bushing 340 is arranged between the guide rail 330 and the sliding hole 421.

[0057] In this embodiment, as a first embodiment of the spherical sleeve 340 (not provided with drawings), the spherical sleeve 340 includes an outer ring and an inner ring. The outer ring is generally an annular component with a spherical groove, which is used to connect with the sliding hole 421. The spherical groove of the outer ring matches the spherical protrusion of the inner ring to form spherical contact. The inner ring can freely rotate around its axis within the outer ring by a certain angle. A through hole 232 is provided at the center of the inner ring, and the guide rail 330 is movably arranged in the through hole 232. In this way, the guide rail 330 rotates relatively inside the outer ring through the inner ring, so that the guide rail 330 can freely deflect within a certain angle range to adapt to possible slight misalignment or angular deviation problems, and compensate for installation errors or slight bending of the shaft to a certain extent, so that the two guide rails 330 are concentric with the sliding sleeves at both ends, which helps to improve the smoothness and stability of the displacement of the sliding member 300 on the sliding sleeve through the guide rail 330.

[0058] Furthermore, spherical balls may be provided on the contact surfaces of the inner ring and the outer ring, thereby utilizing the spherical balls to reduce the contact friction between the inner ring and the outer ring during rotation.

[0059] As a second embodiment of the spherical sleeve 340, refer to Figure 1The spherical sleeve 340 can be a spherical sleeve. The overall shape of the spherical sleeve can be spherical or other shapes. It is preferably a barrel shape with a larger diameter in the middle and gradually decreasing diameters towards both ends. The spherical sleeve is penetrated by a through hole 232 that cooperates with the guide rail 330. The guide rail 330 is passed through the spherical sleeve through the through hole 232. The inner wall shape of the sliding hole 421 is an annular concave surface as a whole, and is adapted to the surface of the spherical sleeve. A spherical fit is formed between the spherical sleeve and the sliding hole 421. In this way, the spherical sleeve can also be used to rotate relative to each other in the concave surface, thereby achieving the above-mentioned effect.

[0060] In this embodiment, the provision of the spherical sleeve 340 also has the following advantages:

[0061] First, the movable contact between the guide rail 330 and the sliding hole 421 is transformed into the movable contact between the guide rail 330 and the spherical shaft sleeve 340. The load and friction on the single guide rail 330 are shared by the two spherical shaft sleeves 340, effectively reducing the wear of the sliding shaft sleeve and reducing frictional heat;

[0062] Second, the spherical bushings 340 are distributed at both ends of the housing, which can increase the number of guide points and help average out the error factors of the guide rail 330, such as surface roughness and bending deformation. This can improve the guidance accuracy and make the structure more stable during movement.

[0063] 3. It helps to enhance the overall rigidity of the structure: When the guide rail 330 is subjected to external loads, the supporting effect of the spherical bushings 340 at both ends can effectively resist deformation, maintain the shape and dimensional stability of the structure, better constrain the movement of the guide rail 330, reduce the possibility of vibration and offset, and thus make the movable cutter head 612 more stable when sliding.

[0064] In this embodiment, when the spherical bushing 340 is provided, the above-mentioned sliding bushing may not be provided, and only the spherical bushing 340 may be provided.

[0065] Based on the above embodiment, refer to Figure 1 、 2The spherical sleeve 340 is fixed to the sliding hole 421 and the spherical sleeve 340 is fixed to the sliding hole 421. ...

[0066] Specifically, refer to Figure 1 As an embodiment of the elastic preload member 350, this embodiment uses the second embodiment of the spherical sleeve 340, that is, the spherical sleeve 340 as a spherical sleeve, to illustrate the solution of the elastic preload member 350:

[0067] The elastic preload member 350 includes a contact portion 351 connected to the inner wall of the sliding hole 421 and an elastic portion 352 arranged in an annular manner on the contact portion 351. The elastic portion 352 is elastically pressed against the surface of the spherical sleeve. When the spherical sleeve is subjected to the force of the guide rail 330, it can drive the spherical sleeve to squeeze the elastic portion 352 and bend, thereby allowing the spherical sleeve to rotate relatively, so that the guide rail 330 can deflect freely within a certain angle to adapt to possible slight misalignment or angular deviation problems.

[0068] Specifically, the elastic preload member 350 can be made of metal material, the contact portion 351 can be designed as a ring to fit with the inner wall of the sliding hole 421, and the elastic portion 352 is a metal sheet with multiple spacer rings arranged on one side of the contact portion 351. The free end of the metal sheet is bent along the surface of the spherical sleeve so that the multiple metal sheets can be stably fitted on the spherical sleeve to realize the elastic positioning function of the spherical sleeve.

[0069] Of course, the elastic preload member 350 may also be a plurality of springs, compression springs, elastic rubbers or elastic levers arranged in a ring on the inner wall of the sliding hole 421. As long as it can provide positioning and elastic preload for the spherical sleeve 340 and allow the spherical sleeve 340 to have a certain degree of free rotation, the elastic preload member 350 may also be other components or structures, which will not be described one by one here.

[0070] Based on the above embodiment, the reciprocating drive mechanism serves as the power part for driving the sliding member 300 to move back and forth. Its reciprocating drive mechanism can use an existing magnetic swing motor to drive the above-mentioned sliding member 300 to slide back and forth. The specific magnetic swing motor driving method is: a magnet is set on the sliding member 300, and a coil is provided at the lower end of the magnet. The coil is used to repeatedly pass current in different directions, thereby generating a reciprocating magnetic field to push the magnet to drive the sliding member 300 to swing back and forth. Preferably, the reciprocating drive mechanism in this embodiment includes a motor 200 and a transmission assembly 100. The transmission assembly 100 is connected to the sliding member 300. The motor 200 is used to drive the transmission assembly 100 to move, thereby converting the rotational motion of the motor 200 into a reciprocating motion along the axial direction of the guide rail 330.

[0071] The transmission assembly 100 is arranged in the housing, referring to Figure 2 and 5 The eccentric wheel 110 is connected to the output shaft of the motor 200 by the eccentric wheel 110, and the upper end surface of the deflection wheel is provided with an eccentric shaft 111 away from the center position. The connecting seat 120 is provided with a first connecting hole 1201 and a second connecting hole 1202. The first connecting hole 1201 is plugged into the deflection shaft, and the two can rotate relative to each other. The second connecting hole 1202 is plugged into the lower end of the second connecting shaft 121. The upper end of the second connecting shaft 121 is connected to the main body 310 of the sliding member 300. When the motor 200 is running, the connecting seat 120 is driven to move by the eccentric wheel 110, and the connecting seat 120 drives the sliding member 300 to reciprocate along the axial direction of the guide rail 330 through the second connecting shaft 121. The upper end of the main body 310 is provided with a first connecting shaft 320, which is connected to the movable cutter head 612, thereby driving the movable cutter head 612 to reciprocate to realize the hair trimming function.

[0072] In this embodiment, the first connecting shaft 320 and the main body 310 are detachable or can be integrally formed. The detachable connection makes it easy to replace the corresponding parts when either one is damaged, thereby reducing the maintenance cost of the product when it is damaged.

[0073] In this embodiment, the second connecting shaft 121 can be rotatably connected to either the connecting base 120 or the main body 310 . Of course, both ends of the second connecting shaft 121 can also be rotatably connected to the connecting base 120 and the main body 310 respectively.

[0074] In this embodiment, in order to improve the lubrication smoothness of the rotation between the second connecting shaft 121, the connecting seat 120 and the main body 310, a ball bearing can be added at the connection position between the second connecting shaft 121, the connecting seat 120 and the main body 310, and then the ball bearing can be used to reduce the friction resistance when the corresponding components rotate.

[0075] In this embodiment, the first connecting shaft 320 can be screwed, plugged, clamped, bonded or integrally formed with the movable cutter head 612. In this embodiment, a detachable method is preferably adopted, in which an axial hole 6121a can be opened on the movable cutter head 612, and the upper end of the first connecting shaft 320 can be inserted into the axial hole 6121a, thereby conveniently completing the rapid assembly between the movable cutter head 612 and the first connecting shaft 320, and the disassembly, assembly and maintenance of the two are more convenient and quick.

[0076] Further, refer to Figure 7 and 8 A connecting piece 6121 can be added between the movable cutter head 612 and the first connecting shaft 320. The connecting piece 6121 is connected to the cutter head 610 by screwing, welding or other detachable or non-detachable means, and the shaft hole 6121a is provided on the connecting piece 6121. In this way, the force point of the first connecting shaft 320 and the movable cutter head 612 can be transferred to the connecting piece 6121, thereby avoiding the first connecting shaft 320 directly driving the cutter head 612 to move, resulting in concentrated force and easy damage to the cutter head 610. At the same time, it also avoids the problem of opening the shaft hole 6121a on the relatively thin movable cutter head 612 to affect its structural strength.

[0077] Preferably, the first connecting shaft 320 and the shaft hole 6121a can adopt interference fit, clearance or overfit, as long as the structural tightness of the two can be guaranteed. Of course, the movable cutter head 612 and the first connecting shaft 320 can also be connected through other components, which will not be elaborated here.

[0078] In this embodiment, the shape of the first connecting shaft 320 can be cylindrical, prism or other shapes, and the shape of the corresponding shaft hole 6121a can be adapted to the shape of the first connecting shaft 320.

[0079] Further, refer to Figure 3 In order to reduce the vibration and noise during product operation and improve transmission accuracy, an elastic tensioning member 130 is additionally provided between the connecting seat 120 and the main body 310 of the sliding member 300. The elastic tensioning member 130 applies opposite pulling forces or opposite elastic supporting forces to the connecting seat 120 and the sliding member 300, thereby maintaining a tensioned state between the connecting seat 120 and the sliding member 300 at all times, thereby reducing the active gap between the sliding member 300 and the connecting seat 120 during relative movement, reducing the generation of vibration and noise, and improving transmission accuracy.

[0080] In this embodiment, the elastic tensioning member 130 can be an elastic member such as a spring, a tension spring, a compression spring or elastic rubber, as long as it can maintain the elastic tensioning force between the connecting seat 120 and the sliding member 300 to reduce the gap between the components. It may also be other elastic parts 352 or components, which will not be described in detail here.

[0081] In this embodiment, taking the spring as an example, in order to optimize the product structure, the spring can be sleeved on the outside of the first connecting shaft 320, with the upper end of the spring connected to the main body 310 and the lower end connected to the connecting seat 120. The advantage of this arrangement is that it can optimize the product space and reduce the elastic tensioning member 130 from occupying too much space inside the hair clipper. Of course, the elastic member can also be arranged at other positions between the connecting seat 120 and the main body 310, which will not be elaborated here.

[0082] Based on the above embodiment, the elastic tensioning member 130 can also be arranged between the eccentric wheel 110 and the connecting seat 120, and can also play the role of tensioning the connecting seat 120 and the eccentric wheel 110, thereby achieving the above-mentioned noise reduction and vibration reduction effect.

[0083] Based on the above embodiment, refer to Figure 2 and 3 The shell includes a first cavity for accommodating the motor 200 and a second cavity for accommodating the transmission assembly 100 and the cutter head sliding mechanism. For the convenience of description, the shell with the first cavity is called the first shell 410, and the shell corresponding to the second cavity is called the second shell 420. The first shell 410 and the second shell 420 can be integrally formed or can be detachably combined. In this embodiment, the first shell 410 and the second shell 420 are integrally formed, and a partition is provided between the two to divide the entire shell into a first cavity and a second cavity. At the same time, the provision of the partition can also enhance the structural strength of the entire shell. The first cavity is provided with the motor 200, and the second cavity is provided with the transmission assembly 100 and the cutter head sliding mechanism. By dividing different cavities, it helps to improve the sealing degree of various parts of the entire product. At the same time, the provision of the first cavity and the second cavity also prevents the heat generated by the relatively large motor 200 from being transferred to the second cavity during operation. While reducing heat transfer, the noise generated by the motor 200 is blocked and reduced from being transmitted to the outside of the hair clipper through multiple cavities, thereby improving the user experience.

[0084] In this embodiment, a dust cover 500 is provided on the second shell 420. The dust cover 500 is a flexible bellows so that when the first connecting shaft 320 reciprocates, the dust cover 500 can be elastically deformed to adapt to the reciprocating swing of the first connecting shaft 320.

[0085] Based on the above embodiment, refer to Figure 8The motor 200 includes a rotor housing 230, a coil 210, a magnet 220, a bracket 260, a motor output shaft 240 and a first bearing 250. The rotor housing 230 and the bracket 260 are preferably in a cylindrical structure. The bracket 260 is provided with a plurality of mounting grooves 2601 in a spacer ring. The center of the bottom plate extends downward to form a stator barrel 423. The interior of the stator barrel 423 is hollow to facilitate the arrangement of the motor output shaft 240. The coil 210 is wrapped around the stator barrel 423. There are at least two magnets 220, and the magnets 220 are correspondingly installed in the corresponding mounting holes. The magnets 220 are installed in the groove 2601. After the multiple magnets 220 are installed on the bracket 260, they are fixedly connected to the rotor shell 230 through the bracket 260. The coil 210 is located inside the several ring-shaped magnets 220. The motor output shaft 240 is rotatably connected to the hollow inner wall of the stator cylinder 423 through the first bearing 250, and its lower end is fixed to the bottom center position of the rotor shell 230. After the motor 200 is energized, the magnets 220 drive the bracket 260 and the rotor shell 230 to rotate in the first shell 410, thereby driving the motor output shaft 240 to rotate.

[0086] In this embodiment, the magnet 220 can be fixed in the mounting groove 2601 by gluing, snapping or other methods.

[0087] In this embodiment, the magnet 220 can also be a whole ring magnet directly arranged on the rotor shell 230. In this embodiment, multiple magnets 220 are arranged in a ring inside the rotor shell 230. The design utilizes multiple magnets 220. Compared with an integral ring magnet, the magnetic field generated by the multiple magnets 220 has a stronger magnetic field strength than the integrated ring magnet, and the driving force on the motor output shaft 240 is also relatively large. Therefore, it is better than the solution of a whole ring magnet. At the same time, the installation groove 2601 is added, which also makes it more convenient to position and install the magnet 220. At the same time, when some magnets 220 are damaged, the corresponding magnets 220 can also be disassembled and replaced, thereby reducing subsequent maintenance costs.

[0088] Based on the above embodiment, the bracket 260 includes a bottom ring 262 and a spacer ring, and a plurality of partition rods 261 are arranged on the bottom ring. Mounting grooves 2601 are formed between adjacent partition rods 261. The advantage of this design is that the adjacent magnets 220 can be divided by the partition rods 261, and the side edges of the magnets 260 can be supported at the same time, so as to support and protect the side edges of the magnets 220 when the rotor shell 230 rotates along its circumferential direction.

[0089] Based on the above embodiment, a hair clipper is provided, which includes a housing 600. The entire housing is installed inside the housing 600. Specifically, the housing can be installed in the housing 600 through a mounting bracket 430. The housing is cylindrical in shape, and its lower end is used for a user to hold. A power supply, a circuit board, a motor 200 and other components are provided inside the housing. Other components commonly used in hair clippers, such as switches, power display screens or touch screens and other existing structures, are not described one by one here. Only the main technical features related to the embodiment are parameterized. The fixed blade head 611 is generally fixedly installed at the upper end of the housing 600.

[0090] In this embodiment, refer to Figure 2 In order to further improve the heat dissipation of the entire product during operation, a heat dissipation structure is provided on the first shell 410 and / or the second shell 420. The heat dissipation structure can improve the heat dissipation of the entire shell, thereby reducing the heat generation of the product and protecting the electrical components inside the shell, thereby preventing the internal electrical components from working in a high-temperature environment for a long time and affecting their service life.

[0091] Specifically, as an embodiment of the heat dissipation structure, the heat dissipation structure may be heat dissipation fins 412 on the housing. The heat dissipation fins 412 are used to increase the heat dissipation area, thereby improving the heat dissipation efficiency of the housing.

[0092] As another embodiment of the heat dissipation structure, the heat dissipation structure may also be a micro fan provided on the surface of the housing, so as to utilize the micro fan to improve the heat dissipation efficiency of the housing.

[0093] As another embodiment of the heat dissipation structure, refer to Figure 2 and 4 The heat dissipation structure can also be heat dissipation holes 411 opened on the surface of the shell, which utilize the heat dissipation holes 411 to dissipate the heat of the shell to the outside of the shell, avoiding heat accumulation in the shell and the problem of excessive temperature rise.

[0094] In the above embodiment, the heat dissipation mechanism is directly provided on the shell. Since the first shell 410 is provided with the motor 200, which generates relatively large heat and is also the main heat source of the entire hair clipper, in order to improve the heat dissipation efficiency of the first shell 410, a guide structure is provided on the rotor shell 230. When the rotor shell 230 rotates at high speed, its own guide structure is utilized to connect the interior of the rotor shell 230 with the external airflow, thereby achieving the effect of rapid cooling.

[0095] Specifically, as a first embodiment of the guide structure, it can be a through hole 232 provided on the rotor shell 230, and the through hole 232 can be opened at the bottom and / or side of the rotor shell 230. When it is provided at the bottom, a plurality of through holes 232 are arranged on the rotor shell 230 around the motor output shaft 240 as the center point.

[0096] In this embodiment, the through holes 232 may be a plurality of single holes arranged at intervals, or may be continuous holes arranged in a ring shape, which will not be described in detail here.

[0097] Furthermore, as a second embodiment of the guide structure, when the through hole 232 is provided at the bottom of the rotor shell 230, the side of the through hole 232 is raised to form a fan blade 231. In this way, when the rotor shell 230 rotates, the airflow generated by the fan blade 231 is used to quickly conduct the heat inside the rotor shell 230 to the outside of the motor 200, thereby effectively improving the heat dissipation efficiency of the motor 200 and enhancing the heat dissipation effect.

[0098] In this embodiment, the blades 231 can extend toward the interior of the rotor housing 230 or toward the exterior of the rotor housing 230. When the blades 231 rotate, the airflow can be directed from the interior of the rotor housing 230 to the exterior, or it can be directed to convey relatively cool air outside the rotor housing 230 into the interior of the rotor housing 230. Both methods can achieve the purpose of cooling. In this embodiment, it is preferred to convey airflow from the interior of the rotor housing 230 to the exterior, as this provides a more effective heat dissipation effect.

[0099] As a third embodiment of the guide structure, refer to Figure 9 Its flow-guiding structure is similar to that of the second embodiment, wherein the through-hole 232 spacer ring is provided on the circumference of the rotor shell 230, and the flow-guiding structure is a centrifugal blade 233 provided in the through-hole 232. When the rotor shell 230 rotates, the centrifugal blade forms an airflow along its axial direction inside the rotor shell 230, thereby accelerating the flow guidance and cooling inside the rotor shell 230, thereby achieving the effect of cooling the motor.

[0100] Based on the above embodiments, the second embodiment and the third embodiment of the above-mentioned guide structure can be used simultaneously, that is, while the fan blades 231 are set at the bottom of the rotor shell 230, the centrifugal fan blades 233 are set on the side of the rotor shell 230. In this way, when the rotor shell 230 is rotating, the fan blades 231 and the centrifugal fan blades 233 operate synchronously, effectively accelerating the air flow inside the rotor shell 230, thereby greatly enhancing the cooling effect of the motor.

[0101] Based on the second embodiment of the above-mentioned guide structure, the fan blade 231 is provided separately, that is, a through hole 232 is opened on the rotor shell 230, which is only used to connect the internal and external airflows of the rotor shell 230, and the fan blade 231 can be a fan blade separately provided at the bottom of the rotor shell 230, which can also achieve the above-mentioned purpose of guiding the airflow for heat dissipation.

[0102] It is conceivable that when the fan blades 231 are provided separately, the fan blades 231 can also be integrated with the motor output shaft 240, which can also achieve the effect of guiding the flow and cooling the motor.

[0103] Based on the above embodiment, the above-mentioned motor 200 can be directly installed inside the casing 600, and it can adopt the existing commonly used screw fastening method. In order to improve the convenience of installing the motor 200 on the casing 600 and improve the protection of the motor 200, a mounting bracket 430 can be added to the motor 200 and the casing 600 bracket 260. The motor 200 can be first fixed on the mounting bracket 430, and then the mounting bracket 430 can be installed in the casing 600 by screws.

[0104] Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hair clipper comprising a cutter head, a motor, and a transmission assembly for converting the rotational motion of the motor into reciprocating motion of the cutter head, characterized in that: The transmission assembly includes an eccentric wheel, a connecting seat and a linkage shaft. The eccentric wheel is driven by the motor and is rotatably connected to one end of the connecting seat. The other end of the connecting seat is rotatably connected to the cutter head through a linkage shaft. An elastic tensioning member is provided between the cutter head and the connecting seat and / or between the connecting seat and the eccentric wheel.

2. A hair clipper according to claim 1, characterized in that: The connecting seat is respectively provided with a first connecting hole cooperating with the eccentric wheel and a second connecting hole cooperating with the linkage shaft. The eccentric wheel is provided with an eccentric shaft, and the eccentric shaft is rotatably connected in the first connecting hole.

3. A hair clipper according to claim 2, characterized in that: The hair clipper includes a housing for accommodating the motor and the transmission assembly, the housing is assembled in the housing, and the cutter head includes a fixed cutter head fixedly connected to the housing and a movable cutter head slidably arranged on one side of the fixed cutter head.

4. A hair clipper according to claim 3, characterized in that: The movable cutter head is linearly slidably arranged in the housing through a cutter head sliding mechanism, and one end of the linkage shaft away from the eccentric wheel is plugged into the movable cutter head.

5. A hair clipper according to claim 4, characterized in that: The cutter head sliding mechanism includes a guide rail provided on the housing and a sliding member sliding axially along the guide rail. A swing shaft is fixed on the sliding member, and the swing shaft is connected to the movable cutter head. The end of the linkage shaft away from the connecting seat is connected to the sliding member.

6. A hair clipper according to claim 5, characterized in that: The elastic tensioning member includes a spring, a compression spring or an elastic belt arranged between the sliding member and the connecting seat.

7. A hair clipper according to claim 5, characterized in that: The elastic tensioning member is correspondingly sleeved on the outside of the linkage shaft.

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