Tool bit swing assembly and hair clipper

Abstract

The invention relates to the technical field of hair clippers, in particular to a tool bit swing assembly and a hair clipper, the tool bit swing assembly comprises a floating tool bit and a swing seat connected with the hair clipper, the floating tool bit and the swing seat are connected through a swing mechanism, and the swing mechanism comprises a ball head and a matching hole rotationally matched with the ball head; any one of the bottom of the floating tool bit and the swinging seat is provided with a matching hole, the other one is provided with a ball head, and a swinging gap is formed between the swinging seat and the floating tool bit on the periphery of the ball head, so that the floating tool bit and the swinging seat can relatively swing in the swinging gap by taking the ball head as a rotating point; the problems that according to an existing floating tool bit swinging mode, the shaving effect is poor, and the user experience is relatively poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of hair clippers, and in particular to a cutter head swinging assembly and a hair clipper. Background Art

[0002] Electric hair clippers are commonly used hairdressing tools, and there are many types of them. Taking floating razors as an example, the existing application number is: "202320543175.1" and the name is: "A floating blade head razor" Chinese patent application, which uses a spring as a floating structure. When shaving, the floating blade head uses the elastic expansion and contraction of the spring to make the floating blade head bend relative to the body to fit the human face. The disadvantage is that due to the non-directionality of the spring in the vertical and lateral deformation, the blade head on the floating blade head is prone to deformation and displacement when sliding on the human skin, resulting in poor fit between the entire blade head and the skin, affecting the haircutting and shaving effect. At the same time, the way the spring resets the floating blade head is also prone to produce abnormal noise, affecting the product experience. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a cutter head swing assembly, which solves the problem that the existing floating cutter head swing method has poor shaving effect and relatively poor user experience.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a cutter head swinging assembly, including a floating cutter head and a swinging seat connected to the hair clipper, including a floating cutter head and a swinging seat connected by a swinging mechanism, the swinging mechanism including a ball head and a matching hole that cooperates with the ball head for rotation, a matching hole is set on either the bottom of the floating cutter head or the swinging seat, and a ball head is set on the other, and a swinging gap is set on the outer periphery of the ball head between the swinging seat and the floating cutter head, so that the floating cutter head and the swinging seat can swing relative to each other in the swinging gap with the ball head as the rotation point.

[0005] Furthermore, the matching hole is arranged at the upper end of the swing seat; the upper end surface of the swing seat and / or the bottom of the floating cutter head are provided with an inclined surface, and the swing gap is formed between the floating cutter head and the swing seat by utilizing the inclined surface.

[0006] By adopting the above technical solution, the matching hole is arranged at the upper end of the swing seat, so that the hinge point of the floating cutter head and the swing seat falls on the axis position of the two, so as to form a swing gap outside the hinge point. As an embodiment of the swing gap, it can be an inclined surface formed at the upper end of the swing seat, and the swing gap is formed between the inclined surface and the floating cutter head. In this way, when the floating cutter head rotates in the matching hole through the ball head to swing relative to the swing seat, the floating cutter head can swing vertically in the swing gap with the ball head as the swing center, so as to achieve a stable swing of the floating cutter head.

[0007] As another embodiment of the swing gap, different from the above, its inclined surface can be provided on the floating cutter head, that is, the floating cutter head forms an inclined concave surface around the ball head, thereby forming a swing gap between the floating cutter head and the swing seat, which can also achieve the above effect. Of course, the above two embodiments of the swing gap can exist at the same time, that is, the upper end surface of the swing seat forms an inclined surface, and the corresponding position of the bottom surface of the floating cutter head is also provided with an inclined surface. The swing gap can also be formed by using two inclined surfaces. In summary, by providing an inclined surface on the corresponding component, it is possible to provide rotation conditions for the floating cutter head to swing relative to the swing seat without the need to provide a corresponding swing gap. It can optimize the product structure and make the overall structure of the product more compact and reasonable.

[0008] Furthermore, the diameter of the ball head is within 3mm-10mm.

[0009] By adopting the above technical solution, this diameter setting ensures the structural stability of the floating cutter head and the swing seat when they are hinged, while also maximizing the contact surface between the ball head and the matching hole, thereby reducing the contact friction between the floating cutter head and the swing seat, forming point contact rather than large-area surface contact between the two, thereby reducing the friction loss of the corresponding components, improving the product service life and the smoothness of the floating cutter head when it swings.

[0010] Furthermore, the angle of the swing gap is within 5°-15°.

[0011] By adopting the above technical solution, the swing angle, that is, the optimal swing angle between the floating cutter head and the swing sleeve, better fits the human skin, while also avoiding the problem that the swing arc of the floating cutter head is too small or too large to affect normal use. This angle setting is more in line with the swing angle of the hair clipper when trimming hair.

[0012] Furthermore, an oil storage groove is provided on the surface of the ball head and / or the inner wall of the matching hole to reduce the sliding friction between the ball head and the matching hole.

[0013] By adopting the above technical solution, the provision of the oil storage tank can reduce the contact friction when the ball head slides in the matching hole, thereby making the floating cutter head smoother when swinging.

[0014] Furthermore, a swing frame is installed at the bottom of the floating cutter head, and a ball head is formed on the bottom surface of the swing frame.

[0015] By adopting the above technical solution and setting up the swing frame, the connection force point between the swing seat and the floating cutter head can be transferred to the swing frame, thereby improving the structural strength of the floating cutter head. At the same time, when the ball head is worn and damaged, the swing frame can be replaced with a new ball head without replacing the entire floating cutter head shell, which effectively reduces the product maintenance cost.

[0016] Furthermore, a swing sleeve is installed at the bottom of the floating cutter head, a matching cavity is arranged inside the swing sleeve, and the upper end of the swing seat is correspondingly swingably embedded in the matching cavity.

[0017] By adopting the above technical solution, a swing sleeve is arranged at the bottom of the floating cutter head, and the upper end of the swing seat is limited to swing in the matching cavity by using the matching cavity. In this way, after the swing seat and the swing sleeve are initially combined, and then the swing sleeve is assembled to the bottom of the floating cutter head, the assembly or separation of the swing seat, the swing sleeve and the floating cutter head can be completed conveniently.

[0018] Furthermore, the swing sleeve and the floating cutter head are detachably connected.

[0019] By adopting the above technical solution, the detachable connection method makes it convenient to assemble or separate the swing sleeve and the floating cutter head.

[0020] Furthermore, the inner diameter of the matching cavity decreases from top to bottom so that its side wall forms an arc surface, and the upper end of the swing seat is adapted to the shape of the matching cavity.

[0021] By adopting the above technical scheme, the shape of the matching cavity is set so that the matching cavity forms a funnel-shaped structure that is wide at the top and narrow at the bottom. At the same time, the curved surface of the side is utilized. When the shape of the upper end of the rocking seat is adapted to the shape of the matching cavity, the rocking seat is connected to the matching cavity through the upper end. It can only swing along its axis in the matching cavity and cannot move downward along its axial direction. Because the matching hole is set at the upper end of the axial direction and is restricted by the interference of the ball head, when the rocking seat is assembled to the matching hole, it can only swing relative to the rocking sleeve without axial movement, thereby ensuring the stability of the floating cutter head during swinging.

[0022] Furthermore, a circumferential spacing ring of the matching cavity is provided with a rotation-stopping groove, which is arranged along its height direction, and a circumferential surface of one end of the swing seat is correspondingly provided with a rotation-stopping rib that slidably cooperates with it.

[0023] By adopting the above technical solution, after the upper end of the swing seat is embedded in the matching cavity, the sliding fit between the anti-rotation rib and the anti-rotation groove is utilized, thereby preventing the swing seat from rotating along its axial direction in the matching cavity, thereby limiting the movement direction of the swing seat to the swing on the horizontal plane.

[0024] Furthermore, a protrusion or a depression is provided on the inner wall spacing ring of the matching cavity, so as to reduce the sliding contact surface between the swing sleeve and the matching cavity through the protrusion or the depression.

[0025] By adopting the above technical solution, through the setting of the protrusion or the recess, the protrusion or the recess can be used to reduce the sliding contact area between the swing sleeve and the inner wall of the matching cavity, thereby effectively reducing the contact friction area between the two, so that the swing sleeve can swing relatively smoothly and easily inside the matching cavity.

[0026] Furthermore, an elastic reset sleeve is provided between the floating cutter head and the swing seat, and two ends of the elastic reset sleeve are respectively connected to the floating cutter head and the swing seat for elastic reset of the two after swinging.

[0027] By adopting the above technical solution, the elastic reset sleeve can provide a reset support force for the swing of the floating cutter head.

[0028] A hair clipper comprises a body, a circular cutter head, a transmission assembly, a rotary actuator and the above-mentioned cutter head swing assembly. The circular cutter head is arranged on the floating cutter head, the rotary actuator is arranged in the body, and the transmission mechanism comprises a transmission shaft. The upper end of the transmission shaft passes through a ball head and is linked to the circular cutter head, and the lower end of the transmission shaft is linked to the rotary actuator.

[0029] Furthermore, the transmission assembly also includes a gear assembly, and the upper and lower ends of the transmission shaft are respectively linked to the circular cutter head and the rotary actuator through the gear assembly.

[0030] By adopting the above technical solution, the rotary actuator and the transmission shaft are linked through the gear assembly, so that the rotation speed and torque of the transmission shaft can be adjusted by using the gear ratios of different gears.

[0031] Furthermore, the gear assembly includes a first gear group and a second gear group, the second gear group includes a central gear and a planetary gear, the planetary gear is rotatably arranged in the floating cutter head, its upper end is connected to the circular cutter head, its side is meshed with the central gear, and the center of the central gear is connected to the transmission shaft.

[0032] Based on the above embodiment, the planetary gear is arranged to facilitate the connection of multiple circular cutter heads, which mesh with the central gear, and also facilitate the synchronous movement of multiple circular cutter heads through the rotation of one central gear.

[0033] Furthermore, the transmission shaft includes an output shaft, an elastic coupling and an input shaft. The output shaft is coaxially linked with the input shaft through the elastic coupling. The output shaft is correspondingly connected to the central gear, and the input shaft is linked with the rotary actuator through the first gear set.

[0034] By adopting the above technical solution, the elastic coupling can maintain power transmission between the input shaft and the output shaft after bending at a certain angle between the two, so as to adapt to the circular cutter head being able to maintain power transmission after the floating cutter head swings relative to the fuselage.

[0035] Furthermore, a cavity is provided inside the swing sleeve, and the elastic coupling is correspondingly arranged in the cavity.

[0036] By adopting the above technical solution, the setting of the cavity makes it easy to accommodate the elastic connector, so as to improve the degree of integration of product parts and make the product relatively more compact.

[0037] Compared with the prior art, the advantages of the present invention are:

[0038] 1. In the present invention, a matching hole is provided on the swing seat, a ball head is provided at the bottom of the floating cutter head, or a ball head is provided on the swing seat and a matching hole is provided on the floating cutter head, and then the ball head cooperates with the matching hole to form a hinge point, so that the floating cutter head can rotate relative to the swing seat around the hinge point, and a swing gap is formed on the outside of the ball head to provide a swing space for the floating cutter head to swing relative to the swing seat. In this way, the floating cutter head can swing relative to the swing seat in the swing gap with the ball head as the swing center. Compared with the existing method of floating the floating cutter head with a spring, the swing structure stability of the floating cutter head in the horizontal direction can be improved, so that the floating cutter head can better change the swing angle to fit the human face, especially for uneven areas of the face, such as the chin and neck; at the same time, the matching method of the ball head and the matching hole ball head also reduces the operating noise when the traditional spring provides floating support, reduces the discomfort during shaving caused by abnormal spring jamming or uneven force, and the user has a better experience when using the product.

[0039] 2. In the present invention, the ball head is designed to rotate in the matching hole, so that the rotational contact area between the entire floating cutter head and the swing seat is smaller, so that the two can directly form a point contact rotation rather than a large area of ​​surface contact sliding, and then by reducing the contact area between the floating cutter head and the swing seat at the rotation point, the friction of the floating cutter head and the swing noise when swinging can be reduced, which effectively improves the durability of the product and the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of the hair clipper of the present invention.

[0041] Figure 2 It is a schematic diagram of the floating cutter head structure of the present invention.

[0042] Figure 3 This is a schematic diagram of the swing frame structure of the present invention (A is the bottom surface, B is the top surface).

[0043] Figure 4 This is a disassembly diagram of the floating cutter head of the present invention.

[0044] Figure 5 It is a schematic diagram of the structure of the swing sleeve of the present invention.

[0045] Figure 6 This is a three-dimensional exploded view of the floating cutter head of the present invention.

[0046] Figure 7 The present invention is a whole cross-sectional view of a haircut.

[0047] In the figure:

[0048] 100 body, 110 retaining spring, 120 socket.

[0049] 200 swing seat, 210 bayonet, 220 anti-rotation rib, 230 matching hole, 240 slot.

[0050] 300 floating cutter head, 310 gear bin, 320 gear bin cover, 330 cutter head shell, 331 round cutter head, 332 cover plate, 340 elastic reset sleeve, 341 upper flange, 3411 limiting hole, 342 lower flange, 350 magnetic suction part, 360 swing sleeve, 631 matching cavity, 362 anti-rotation groove, 363 protrusion, 364 limiting protrusion.

[0051] 410 first gear set, 411 first gear, 412 second gear, 420 second gear set, 421 central gear, 4211 boss, 422 planetary gear.

[0052] 500 swing frame, 510 ball head, 511 oil storage tank, 512 shaft hole, 513 positioning column.

[0053] 600 transmission shaft, 610 input shaft, 620 output shaft, 630 elastic coupling, 631 floating connector, 632 transmission seat, 633 transmission connector, 634 spring.

[0054] 700 motor. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below with reference to the accompanying drawings.

[0056] Reference Figure 1 and 2 The cutter head swing assembly includes a floating cutter head 300 and a swing seat 200. The floating cutter head 300 can be installed on the body 100 of the hair clipper through the swing seat 200. The floating cutter head 300 and the swing seat 200 are connected by a swing mechanism. The swing mechanism includes a ball head 510 and a matching hole 230 that is rotatably matched with the ball head 510. The bottom of the floating cutter head 300 is provided with a ball head 510, and the upper end of the swing seat 200 is provided with a matching hole 230 that is matched with the ball head 510. The two are connected in rotation. The outer periphery of the ball head 510 is located between the swing seat 200 and the floating cutter head 300. A swing gap is provided so that the floating cutter head 300 can be rotated with the ball head 510. 10 is a rotation point that swings within the swing gap. This swinging method can improve the stability of the floating cutter head 300's swinging structure in the horizontal direction relative to the existing spring 634 for floating the floating cutter head 300, so that the floating cutter head 300 can better change the swinging angle to fit the human face. At the same time, since the floating cutter head 300 uses the rotation of the convex head and the matching hole 230 as the swinging point, the floating cutter head 300 will not float in the vertical direction when it fits the human skin for shaving. The swinging direction is limited to the horizontal direction, which makes the floating cutter head 300 relatively more stable and quiet when swinging.

[0057] In this embodiment, the ball head 510 is a hemispherical structure, which is arranged at the bottom center of the floating cutter head 300, and the corresponding matching hole 230 is a hemispherical hole, whose shape is adapted to the shape of the ball head 510 so that the ball head 510 can rotate in the matching hole 230.

[0058] In this embodiment, refer to Figure 2 The swing seat 200 may be in the shape of a hollow column structure or other three-dimensional structure. This embodiment takes a column structure as an example, and a cavity is arranged inside it. As an embodiment of a swing gap, the swing seat 200 extends from the matching hole 230 toward its side, and its end face is inclined downward in the vertical direction so that the upper end of the swing seat 200 forms an umbrella-shaped inclined surface, and the matching hole 230 is correspondingly arranged at the center position of the upper end of the swing seat 200. At this time, the bottom of the floating cutter head 300 may be a plane. In this way, by utilizing the swing gap formed between the inclined surface at the upper end of the swing seat 200 and the bottom of the floating cutter head 300, the floating cutter head 300 can be swung in the swing gap with the ball head 510 as the swing point so that the floating cutter head 300 fits the skin and hair of the human body, and the floating cutter head 300 is relatively stable and quiet when swinging.

[0059] As another embodiment of the swing gap, this embodiment is different from the above in that in this embodiment, the upper end of the swing seat 200 can be set as a plane, and an umbrella-shaped inclined surface can be set at the bottom of the floating cutter head 300, that is, the raised umbrella-shaped inclined surface on the swing seat 200 in the above embodiment is mirrored to the bottom of the floating cutter head 300. In this way, the swing gap is formed by utilizing the inclined surface at the bottom of the floating cutter head 300 and the plane at the upper end of the swing seat 200, and the above effect can also be achieved.

[0060] As a third embodiment of the swing gap, the above two embodiments can be combined, that is, the upper end of the swing seat 200 and the bottom of the floating cutter head 300 both form inclined surfaces. In this way, the swing gap is formed between the two inclined surfaces, and the normal swing effect of the floating cutter head 300 when it is around the ball head 510 can also be achieved.

[0061] In this embodiment, the mating hole 230 is located at the center of the upper end surface of the swing seat 200, and the cross-section of the mating hole 230 is much smaller than the upper end area of ​​the swing seat 200. The corresponding area of ​​the ball head 510 is also relatively smaller than the bottom area of ​​the floating cutter head 300. The advantage of this is that the smaller rotating contact surface between the ball head 510 and the mating surface can be utilized to reduce the contact friction force between the floating cutter head 300 and the swing seat 200 when it swings, so that the floating cutter head 300 has less friction resistance when swinging and generates less noise when swinging.

[0062] In this embodiment, the diameter of the ball head 510 is preferably within 3mm-10mm. This diameter setting ensures the structural stability of the floating cutter head 300 and the swing seat 200 when they are hinged, while also maximizing the contact surface between the ball head 510 and the matching hole 230, thereby reducing the contact friction between the floating cutter head 300 and the swing seat 200, forming point contact rather than large-area surface contact between the two, thereby reducing the friction loss and noise of the corresponding components, and improving the product service life and the smoothness of the floating cutter head 300 when it swings.

[0063] It can be imagined that, as long as the structural strength of the corresponding materials of the ball head 510 and the matching hole 230 is guaranteed, the diameter of the ball head 510 and the area of ​​the corresponding matching hole 230 can be reduced as much as possible, which can reduce wear and make the floating cutter head 300 swing more easily and reduce noise. Due to the different strengths of different materials, under the above-mentioned circumstances, the diameter of the ball head 510 may be less than 3 mm or greater than 10 mm, which will not be listed one by one in detail here.

[0064] In this embodiment, refer to Figure 2 (C represents a swing gap), the angle of the swing gap is preferably within 5°-15°. This swing angle, i.e., the optimal swing angle between the floating cutter head 300 and the swing seat 200, enables the floating cutter head 300 to better fit the human skin when rotating, while also avoiding the problem that the swing arc of the floating cutter head 300 is too small or too large to affect normal use. This angle setting is more in line with the swing angle of the hair clipper during hair trimming. Of course, it can be imagined that the swing angle of the swing gap may be outside the above-mentioned angle numbers. Based on the inspiration of the corresponding umbrella-shaped swing gap formed between the end faces of the floating cutter head 300 and the swing seat 200 on the outside of the ball head 510, other setting angles are within the protection scope of this embodiment. The preferred swing gap angle is preferably 10°, which better meets the angle requirement of the floating cutter head 300 fitting the human skin when swinging, while also ensuring the structural stability between the floating cutter head 300 and the swing seat 200.

[0065] Based on the above embodiments, refer to Figure 2 and 3In order to further optimize the maintenance cost of each component of the product and optimize the structural stress point between the floating cutter head 300 and the swing seat 200, a swing frame 500 is arranged at the bottom of the floating cutter head 300. The swing frame 500 can be screwed to the bottom of the floating cutter head 300 by screws, and the ball head 510 is correspondingly arranged at the bottom of the swing frame 500, and the ball head 510 can be integrally formed with the swing frame 500. In this way, by using the above structure, the connection stress point between the swing seat 200 and the floating cutter head 300 can be transferred to the swing frame 500, thereby improving the structural strength of the floating cutter head 300. At the same time, when the ball head 510 is worn and smooth, it can also be replaced by replacing the swing frame 500 without replacing the entire shell structure of the floating cutter head 300, thereby effectively reducing the maintenance cost of the product.

[0066] Based on the above embodiment, in order to further reduce the contact friction when the floating cutter head 300 swings relative to the swing seat 200, so that the floating cutter head 300 can swing more smoothly, an oil storage tank 511 is further provided between the surface of the ball head 510 and the matching hole 230. The lubricating oil stored in the oil storage tank 511 can further reduce the contact friction between the ball head 510 and the inner wall of the matching hole 230.

[0067] Specifically, as an embodiment of the oil storage tank 511, refer to Figure 3 and 4 The oil storage groove 511 can be opened on the ball head 510, and is arranged along the latitude of the ball head 510. When the ball head 510 swings on the inner wall of the matching hole 230, the lubricating oil in the oil storage groove 511 can reduce the contact friction between the ball head 510 and the matching hole 230, so that the entire floating cutter head 300 swings more smoothly and stably.

[0068] As another embodiment of the oil outlet groove, the oil storage groove 511 can also be a groove opened on the inner wall of the matching hole 230, which can also achieve the above-mentioned lubrication effect. Of course, the oil storage groove 511 can also be set on the surface of the ball head 510 and the inner wall of the matching hole 230.

[0069] In this embodiment, the lubricating oil is preferably a solid flexible lubricating oil, such as butter, which has good lubrication effect and strong adhesion, and will not cause leakage of the lubricating oil due to the misalignment and exposure between the oil storage groove 511 and the inner wall of the matching hole 230.

[0070] In this embodiment, refer to Figure 4In the above embodiment, in order to facilitate the assembly of the product, a swing sleeve 360 ​​is further provided at the bottom of the floating cutter head 300. The swing sleeve 360 ​​is an annular structure as a whole, and its periphery is installed on the bottom of the floating cutter head 300 by screws. A matching cavity 361 is provided inside the swing sleeve 360, and the upper end of the swing seat 200 is correspondingly swingably embedded in the matching cavity 361. In this way, when the swing sleeve 360 ​​and the floating cutter head 300 are fixed by screws, the matching hole 230 of the swing sleeve 360 ​​corresponds to the ball head 510 to realize the installation between the swing sleeve 360 ​​and the floating cutter head 300.

[0071] In this embodiment, the swing sleeve 360 ​​is preferably detachably connected to the floating cutter head 300 to facilitate assembly among the swing sleeve 360 ​​, the swing seat 200 and the floating cutter head 300 .

[0072] In the present embodiment, the swing sleeve 360 ​​and the gear chamber 310 are strongly fixed by screws, and the corresponding screw connection between the swing frame 500 and the floating cutter head 300 can also utilize the screws. In this way, the screws on the swing sleeve 360 ​​pass through the swing frame 500 and are locked on the floating cutter head 300, so that the installation of the swing seat 200, the swing frame 500 and the swing sleeve 360 ​​can be completed without involving other redundant assembly parts, which effectively reduces the redundant assembly gaps between the parts caused by the traditional swing seat 200 through snap buckles or other fixing methods, thereby causing abnormal swing noises and complicated product assembly.

[0073] In this embodiment, refer to Figure 3 The upper end surface of the swing frame 500 is provided with a plurality of positioning posts 513, and the bottom of the corresponding floating cutter head 300 is provided with corresponding positioning holes that cooperate with the positioning posts 513. In this way, by inserting the positioning posts 513 into the positioning holes, the pre-installation work between the two can be conveniently completed, so as to facilitate the subsequent screw connection and tightening of the two.

[0074] In this embodiment, refer to Figure 2 and 5 The shape of the matching cavity 361 is a frustum-like shape or a funnel-like shape that is wide at the top and narrow at the bottom, and its side surface is an arc surface, and the upper end of the swing sleeve 360 ​​is also set to a corresponding frustum-like shape. In this way, when the swing sleeve 360 ​​and the swing seat 200 are combined, the lower end of the swing seat 200 can be passed through the matching cavity 361 first, and then the frustum-like part of the upper end of the swing seat 200 and the matching cavity 361 form a swing fit to realize the connection between the two. At this time, after the swing sleeve 360 ​​and the floating cutter head 300 are installed, the matching hole 230 at the upper end of the swing seat 200 forms a rotational fit with the ball head 510.

[0075] Further, refer to Figure 5In order to prevent the swing seat 200 from rotating along its axial direction in the matching cavity 361 and to limit the moving direction of the swing seat 200 to a horizontal plane, anti-rotation grooves 362 are arranged at intervals on the inner wall of the matching cavity 361, and the corresponding upper end circumferential surface of the swing seat 200 is provided with anti-rotation ribs 220 that cooperate with the anti-rotation grooves 362, so as to utilize the sliding cooperation between the anti-rotation ribs 220 and the anti-rotation grooves 362 to limit the moving range of the swing seat 200.

[0076] Furthermore, in order to reduce the friction force when the swing seat 200 swings horizontally in the matching cavity 361, so that the swing seat 200 swings more smoothly in the swing sleeve 360, thereby reducing wear and noise, a protrusion 363 or a recessed portion is provided on the inner wall of the matching cavity 361, referring to Figure 5 Taking the protrusion 363 as an example, the protrusion 363 is arranged along the height direction of the inner wall of the matching cavity 361. When the swing sleeve 360 ​​is movably embedded in the matching cavity 361, the outer side of the swing sleeve 360 ​​contacts the protrusion 363. In this way, due to the existence of the protrusion 363, the contact surface between the swing sleeve 360 ​​and the matching cavity 361 can be limited on the protrusion 363, thereby achieving the purpose of reducing the contact surface between the swing seat 200 and the swing sleeve 360, so as to reduce wear and reduce noise.

[0077] In this embodiment, the principle of the recessed portion is the same as that of the raised portion 363 , which is intended to reduce the contact friction surface between the swing seat 200 and the swing sleeve 360 ​​, thereby achieving the effect of reducing wear and noise, which will not be described in detail here.

[0078] Based on the above embodiments, refer to Figure 2 and 4 In this embodiment, an elastic reset sleeve 340 can also be set between the swing seat 200 and the floating cutter head 300, and then the elastic reset sleeve 340 can be used to elastically reset and support the floating cutter head 300 after swinging. The elastic reset sleeve 340 can be set on the outside of the swing sleeve 360, and its upper and lower ends are respectively against the floating cutter head 300 and the swing sleeve 360. The elastic reset sleeve 340 can be an elastic rubber sleeve, a spring 634, a compression spring or other elastic components.

[0079] In this embodiment, refer to Figure 2 , 5 and 6. A card slot 240 is provided on the outside of the rocking seat 200, and a lower flange 342 is formed on the inner side of the lower end of the elastic reset sleeve 340. The lower end of the elastic reset sleeve 340 is clamped in the card slot 240 through the lower flange 342. An upper flange 341 is provided on the upper end of the elastic reset sleeve 340. The upper flange 341 is correspondingly wrapped and clamped between the rocking seat 200 and the inner wall of the mounting groove, thereby realizing the assembly between the elastic reset sleeve 340, the floating cutter head 300 and the rocking seat 200.

[0080] In this embodiment, the upper end of the elastic reset sleeve 340 is embedded between the inner wall of the installation groove and the outside of the swing sleeve 360. This has the advantage that the gap between the floating cutter head 300 and the swing sleeve 360 ​​can be sealed to prevent dust, hair, etc. from entering the floating cutter head 300 through the gap, thereby effectively improving the dust and pollution prevention effect of the floating cutter head 300. The second advantage is that the elastic force of the elastic reset sleeve 360 ​​itself can be used to buffer the impact force of the swing seat 200 when it swings in the matching cavity 361, thereby avoiding the swinging noise when the floating cutter head swings and the operating noise caused by the assembly gap, thereby effectively improving the user experience.

[0081] In this embodiment, refer to Figure 2 , 5 In order to improve the installation structural stability between the elastic reset sleeve 340 and the swing sleeve 360, a limiting protrusion 364 is provided on the periphery of the swing sleeve 360, and a limiting hole 3411 corresponding to the limiting protrusion 364 is provided on the upper flange 341. In this way, when the elastic reset sleeve 340 is wrapped around the upper end of the swing sleeve 360, the limiting protrusion 364 on the swing sleeve 360 ​​is correspondingly embedded in the limiting hole 3411, thereby improving the structural stability of the elastic reset sleeve 340 and the swing sleeve 360 ​​after assembly, and preventing the two from coaxial rotation.

[0082] Based on the above embodiments, refer to Figure 6 and 7 A hair clipper is provided, including a body 100, a circular cutter head 331, a transmission assembly and a rotary actuator. The floating cutter head 300 includes a gear compartment 310, a gear compartment cover 320 and a cutter head shell 330. The circular cutter head 331 is rotatably arranged in the cutter head shell 330. The rotary actuator is arranged in the body 100. The floating cutter head 300 is detachably mounted on the body 100 through a swing sleeve 360. The transmission mechanism includes a transmission shaft 600. The upper end of the transmission shaft 600 passes through a ball head 510 and is linked to the circular cutter head 331, and the lower end thereof is linked to the rotary actuator.

[0083] In this embodiment, the cutter head shell 330 can be connected to the gear compartment cover 320 by a snap buckle, and the two can also be hinged on one side and magnetically adsorbed on the other side by a magnetic attraction part, so that the two can be flipped open to facilitate cleaning of the gear compartment cover 320 and the circular cutter head 331.

[0084] In this embodiment, the rotary actuator may be a motor, an electric motor 700 or other actuators capable of outputting rotary power.

[0085] In this embodiment, a socket 120 is provided on the body 100 to cooperate with the swing seat 200, and a retaining spring 110 is provided on the inner wall of the socket 120, and a corresponding side of the swing seat is provided with a bayonet 210. When the swing seat 200 is inserted into the socket 120, the retaining spring 110 is correspondingly engaged with the bayonet 210, thereby completing the relative locking between the lower end of the swing seat 200 and the body 100.

[0086] In the present embodiment, a hair clipper designed with multiple circular cutter heads 331 generally has multiple circular cutter heads 331. Taking three circular cutter heads 331 as an example, the three circular cutter heads 331 are generally arranged in a triangle, and corresponding gear assemblies are provided for transmission between the transmission shaft 600 and the multiple circular cutter heads 331 and between the transmission shaft 600 and the motor. The gear assemblies are used to realize power transmission between the motor and the transmission shaft 600, as well as power transmission between the transmission shaft 600 and the multiple circular cutter heads 331.

[0087] In this embodiment, the transmission shaft 600 includes an input shaft 610, an elastic coupling 630 and an output shaft 620. One end of the input shaft 610 is rotatably connected in the fuselage 100 and is linked to the output shaft 620 of the motor through a gear assembly. The other end of the output shaft 620 is elastically connected to the lower end of the output shaft 620 through the elastic coupling 630, and the upper end of the output shaft 620 forms power transmission with multiple circular cutter heads 331 through a gear assembly.

[0088] Specifically, the gear assembly includes a second gear set 420 for transmitting power between the plurality of circular cutter heads 331 and the transmission shaft 600, and a first gear set 410 for transmitting power between the transmission shaft 600 and the motor. The first gear set 410 includes a first gear 411 disposed on the motor output shaft 620. A second gear 412 is meshed on one side of the first gear 411. The second gear 412 is sleeved on the outside of the input shaft 610 to drive the input shaft 610 to rotate. The second gear set 420 is disposed inside the gear bin 310 and is limited inside the gear bin 310 by the gear bin cover 320. The second gear 412 includes a central gear 421 and planetary gears 422 arranged around the central gear 421. The planetary gears 422 are The gear 422 is connected to the gear bin 310 for rotation, the central upper end of the planetary gear 422 is connected to the circular cutter head 331 through an elastic joint, and the center of the central gear 421 is connected to the upper end of the output shaft 620. So far, the operating principle of the entire hair clipper is: the motor starts and then drives the first gear 411 to rotate, the first gear 411 engages with the second gear 412 to rotate, so as to drive the input shaft 610 to rotate in the body 100 through the second gear 412, the input shaft 610 rotates and drives the output shaft 620 to rotate through the elastic coupling 630, thereby driving the central gear 421 to rotate, and after the central gear 421 rotates, it engages with the planetary gear 422 to drive the circular cutter head 331 to rotate on the cutter head cover to achieve hair trimming.

[0089] In this embodiment, the planetary gear 422 is rotatably connected to the gear bin 310. When the planetary gear 422 is subjected to force, the force will be transferred to the gear bin 310. The planetary gear 422 has better stability and load-bearing capacity, and its structural strength is also relatively better.

[0090] Based on the above embodiment, the ball head 510 is arranged at the bottom center position of the gear bin 310, and the matching hole 230 is arranged at the upper end position of the swing seat 200. Of course, the bottom of the floating cutter head 300 can also be set at the upper end of the matching hole 230, and the ball head 510 can be arranged at the bottom of the swing seat 200. Preferably, this embodiment adopts the ball head 510 to be arranged at the bottom of the floating cutter head 300, and the matching groove is opened at the upper end center position of the swing seat 200. The advantage of this design is that in order to allow the output shaft 620 to pass through the ball head 510, the center gear 421 is left above the swing frame 500, and the center gear 421 is not assembled with the gear bin cover 320 plate. In this way, the gear bin cover 320 only plays the role of the cover plate 332 and does not participate in the movement assembly of the gear. This reduces the number of transmission component parts involved, increases assembly accuracy, and reduces the noise of the gear bin 310 movement.

[0091] In this embodiment, refer to Figure 7 The elastic coupling 630 includes a transmission seat 632, a spring 634, a floating connector 631 and a transmission connector 633. The transmission seat 632 is arranged at the upper end of the input shaft 610. The upper end of the transmission seat 632 is elastically connected to the floating connector 631 through a spring 634. The floating connector 631 can swing in a horizontal plane relative to the transmission seat 632 through the spring 634. The transmission connector 633 is arranged at the lower end of the output shaft 620. A socket is provided inside the transmission connector 633. The floating connector 631 can be inserted into the socket to be coaxially connected and rotated with the transmission connector 633. In this way, the elastic coupling 630 can make the input shaft 610 and the output shaft 620 relatively bent or elastically float, and still maintain the transmission of power torque.

[0092] In this embodiment, the elastic joint used for the elastic connection between the planetary gear 422 and the circular cutter head 331 is similar in structure to the elastic coupling 630 and is a commonly used elastic joint design in existing hair clippers, which will not be described in detail here.

[0093] In this embodiment, refer to Figure 6 and 7A boss 4211 is provided at the center of the center gear 421. The interior of the boss 4211 is hollow, and the upper end of the output shaft 620 is correspondingly embedded in the boss 4211 to be connected with the center gear 421. The advantage of this is that the center gear 421 is not assembled with the gear compartment cover 320 plate, and the gear compartment cover 320 plate only plays the role of a cover plate 332 and does not participate in the movement assembly of the center gear 421. This reduces the number of transmission component parts involved, increases assembly accuracy, and reduces the noise of the gear compartment 310 movement.

[0094] In this embodiment, the lower end portion of the output shaft 620, the elastic coupling 630 and the upper end portion of the input shaft 610 are all arranged in the hollow interior of the swing seat 200, and after the input shaft 610 is connected to the floating connector 631 through the transmission connector 633, when the entire floating cutter head 300 swings through the ball head 510, the transmission connector 633 swings on the transmission seat 632 by bending the spring 634 on the floating connector 631, so that the elastic swing point of the entire elastic coupling 630 falls on the floating connector 631 and the transmission seat 632, so that the output shaft 620 is lower than the floating cutter head 300. Only one transmission connector 633 is required at the end, and the sum of the length of the transmission connector 633 and the output shaft 620 located inside the swing seat 200 can be set very short. The advantage of this is that when the floating cutter head 300 swings, the transmission connector 633 located at the lower end of the output shaft 620 is not easy to touch the hollow inner wall of the swing seat 200, thereby ensuring that the floating cutter head 300 can swing normally, and the corresponding swing seat 200 diameter does not need to be set too thick to meet the normal swing of the floating cutter head 300, thereby avoiding the swing seat 200 being too large and affecting the setting of other components.

[0095] Although the preferred embodiments of the present invention are described in detail above, it should be clearly understood that various modifications and variations are possible for those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cutter head swing assembly, comprising a floating cutter head and a swing seat connected to a hair clipper, characterized in that: The floating cutter head and the swing seat are connected by a swing mechanism, and the swing mechanism includes a ball head and a matching hole that rotates with the ball head. A matching hole is set on either the bottom of the floating cutter head or the swing seat, and a ball head is set on the other. A swing gap is set on the outer periphery of the ball head between the swing seat and the floating cutter head, so that the floating cutter head and the swing seat can swing relative to each other in the swing gap with the ball head as the rotation point.

2. A cutter head swing assembly according to claim 1, characterized in that: The matching hole is arranged at the upper end of the swing seat; the upper end surface of the swing seat and / or the bottom of the floating cutter head are provided with an inclined surface, and the swing gap is formed between the floating cutter head and the swing seat by utilizing the inclined surface.

3. A cutter head swing assembly according to claim 1, characterized in that: The diameter of the ball head is within 3mm-10mm.

4. A cutter head swing assembly according to claim 2, characterized in that: The angle of the swing gap is within 5°-15°.

5. The cutter head swing assembly according to claim 1, characterized in that: The surface of the ball head and / or the inner wall of the matching hole is provided with an oil storage groove to reduce the sliding friction between the ball head and the matching hole.

6. The cutter head swing assembly according to claim 1, characterized in that: A swing frame is installed at the bottom of the floating cutter head, and the ball head is formed on the bottom surface of the swing frame.

7. The cutter head swing assembly according to claim 1, characterized in that: A swing sleeve is installed at the bottom of the floating cutter head, a matching cavity is arranged inside the swing sleeve, and the upper end of the swing seat is correspondingly and swingably embedded in the matching cavity.

8. A cutter head swing assembly according to claim 7, characterized in that: The swing sleeve and the floating cutter head are detachably connected.

9. The cutter head swing assembly according to claim 7, characterized in that: The inner diameter of the matching cavity is reduced from top to bottom so that its side wall forms an arc surface, and the upper end of the swing seat is adapted to the shape of the matching cavity.

10. The cutter head swing assembly according to claim 7, characterized in that: The circumferential surface of the matching cavity is provided with a rotation-stopping groove, and the rotation-stopping groove is arranged along its height direction. The circumferential surface of one end of the swing seat is correspondingly provided with a rotation-stopping rib that slides with it.

11. The cutter head swing assembly according to claim 7, characterized in that: The inner wall spacing ring of the matching cavity is provided with a protrusion or a recess, so as to reduce the sliding contact area between the swing sleeve and the matching cavity through the protrusion or the recess.

12. The cutter head swing assembly according to claim 1, characterized in that: An elastic reset sleeve is also provided between the floating cutter head and the swing seat, and two ends of the elastic reset sleeve are respectively connected to the floating cutter head and the swing seat for elastic reset of the two after the swinging.

13. A hair clipper, comprising a body, a circular cutter head, a transmission assembly, a rotary actuator and a cutter head swing assembly as claimed in any one of claims 1 to 12, characterized in that: The circular cutter head is arranged on the floating cutter head, the rotary actuator is arranged in the fuselage, and the transmission mechanism comprises a transmission shaft, the upper end of the transmission shaft passes through the ball head and is linked with the circular cutter head, and the lower end thereof is linked with the rotary actuator.

14. A hair clipper according to claim 13, characterized in that: The transmission assembly also includes a gear assembly, and the upper and lower ends of the transmission shaft are respectively linked with the circular cutter head and the rotary actuator through the gear assembly.

15. A hair clipper according to claim 14, characterized in that: The gear assembly includes a first tooth group and a second tooth group, the second tooth group includes a central gear and a planetary gear, the planetary gear is rotatably arranged in a floating cutter head, the upper end of the planetary gear is connected to the circular cutter head, and the side edge thereof is meshed with the central gear, and the center of the central gear is connected to the transmission shaft.

16. A hair clipper according to claim 15, characterized in that: The transmission shaft comprises an output shaft, an elastic coupling and an input shaft. The output shaft is coaxially linked with the input shaft through the elastic coupling. The output shaft is correspondingly connected to the central gear. The input shaft is linked with the rotary actuator through a first gear set.

17. A hair clipper according to claim 16, characterized in that: A cavity is provided inside the swing sleeve, and the elastic coupling is correspondingly arranged in the cavity.

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