Razor and blade floating structure

Abstract

A shaver and its cutter head floating structure. The cutter head floating structure includes a support member and a shaving unit; a first hinge disposed within the shaving unit, the first hinge having a first mating groove therein; a second hinge, the top of which has a mating portion disposed within the first mating groove, a limiting structure being provided between the first mating groove and the mating portion, the bottom of the second hinge passing through the first hinge and extending into and being mounted in the support member; an elastic member passing through the first hinge and the second hinge, and having both ends respectively abutting against the shaving unit and the support member. When the shaving unit is working and is squeezed by the skin, the limiting structure between the first hinge and the second hinge separates, and the elastic member is compressed so that the first hinge drives the shaving unit to rotate 360°. When the external force applied to the shaving unit decreases, the elastic member elastically returns and pushes the shaving unit upward, thereby realizing the up-and-down floating of the shaving unit, being more adaptable to the changes in the facial curve and bringing a more comfortable use experience to the user.

Description

Technical Field

[0001] The present invention relates to the technical field of personal care products, and in particular provides a razor and a floating structure of its cutter head. Background Art

[0002] In the field of personal care products, such as electric razors, most of the shaving units are fixedly connected to the support structure, that is, the shaving unit cannot move relative to the support structure, and the cutter head assembly located on the shaving unit rotates under the drive of the internal transmission structure for shaving operations. Although this structure meets the shaving requirements, when the shaving unit moves on the skin surface, the shaving unit and the skin are in a rigid contact, and the shaving force is completely adjusted by the hand-held grip of the person. When it is felt that the shaving unit is in close contact with the skin, the razor is pressed a little looser by hand, and vice versa, it is pressed tighter. During the entire shaving process, the hand is in a tense state, and there may be a soreness after shaving, and the use experience is extremely poor.

[0003] To solve this problem, some shaving units use a cross universal joint to achieve rotation with the support structure, but such a structure is cumbersome to assemble, the defective rate increases, and the flexibility of this rotation structure is not high, and the adaptability between the shaving unit and the skin is not fundamentally solved, and a good user experience cannot be provided. Summary of the Invention

[0004] The purpose of the present invention is to provide a floating structure of a cutter head, aiming to solve the technical problems of complex rotation structure, low flexibility, and poor user experience of the shaving unit relative to the support structure in the existing technology.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a floating structure of a cutter head, including,

[0006] A support member;

[0007] A shaving unit, disposed above the support member;

[0008] A first hinge, disposed inside the shaving unit, the first hinge having a first fitting groove, and the bottom of the first fitting groove penetrates through the first hinge;

[0009] A second hinge, the top of which has a fitting portion placed in the first fitting groove, a limiting structure for preventing relative rotation and separable along the central axis direction of the first fitting groove is provided between the first fitting groove and the fitting portion, a first central hole penetrating to the bottom of the second hinge is provided inside the fitting portion, and the bottom of the second hinge passes through the first hinge and extends into the support member for installation;

[0010] An elastic member is disposed through the first fitting groove and the first central hole of the second hinge. The top end of the elastic member abuts against the shaving unit, and the bottom end of the elastic member abuts against the support member.

[0011] Further, the shaving unit includes a housing and a hinge cover plate. The housing has a mounting hole. The first hinge is fixed to the mounting hole through the hinge cover plate. The second hinge extends out at the mounting hole and is fixedly connected to the support member. The top end of the elastic member abuts against the hinge cover plate.

[0012] Further, the first fitting groove has a first spherical arc surface, and the surface of the fitting portion has a second spherical arc surface that cooperates with the first spherical arc surface; alternatively, the first fitting groove has a first plane, and the surface of the fitting portion has a second plane that cooperates with the first plane.

[0013] Further, the limiting structure includes a first limiting plane provided on the outer surface of the fitting portion and a second limiting plane provided in the first fitting groove that can be attached to the first limiting plane.

[0014] Further, a positioning block is provided in the first fitting groove, and the second limiting plane is provided inside the positioning block and faces the center of the first fitting groove.

[0015] Further, there are a plurality of the first limiting planes, and the plurality of the first limiting planes are evenly distributed on the outer wall surface of the fitting portion; there are a plurality of the second limiting planes, and the plurality of the second limiting planes are evenly arranged in the first fitting groove.

[0016] Further, the second hinge is fixedly connected to the support member through a connecting member.

[0017] Further, a second fitting groove is provided on the fitting portion. At least one first connection hole that penetrates is provided on the wall of the second fitting groove. At least one second connection hole that corresponds to and penetrates the first connection hole is provided on the wall of the first fitting groove. An installation post is provided in the support member. The connecting member is a screw that passes through the first connection hole and the second connection hole and extends into the installation post.

[0018] Further, the bottom of the second hinge has a connecting portion, and a positioning structure for limiting the connecting member is provided at a position corresponding to the first connection hole on the connecting portion.

[0019] Further, the positioning structure includes a positioning boss provided on the outer wall of the connecting portion through which the connecting member can pass, and a recess provided below the positioning boss along the height direction of the connecting portion for accommodating the connecting member.

[0020] Further, the top of the support member has a stepped surface that is recessed inward. A second central hole that penetrates the support member is provided on the stepped surface. The mounting post is provided on the stepped surface. A ring-shaped protrusion is provided on the stepped surface and at the edge of the second central hole. The bottom of the elastic member is sleeved on the ring-shaped protrusion.

[0021] Further, the number of the first limiting planes is multiple, and the number of the first connection holes is the same as that of the first limiting planes. One first connection hole is provided between two adjacent first limiting planes.

[0022] Further, at least one stop block is provided at the edge of the mounting hole. A ring-shaped flange is formed by the outward extension of the edge of the first fitting groove. The ring-shaped flange is placed at the edge of the mounting hole. A first avoidance groove is provided on the ring-shaped flange corresponding to the stop block. The hinge cover plate is covered in the first fitting groove, and at least one clamping block that can be clamped at the position of the stop block is provided on the edge of the hinge cover plate.

[0023] Further, a clamping groove into which the clamping block can be clamped when rotating horizontally is provided between the stop block and the edge of the mounting hole. A limiting block that resists the clamping block is provided on one side of the clamping groove. A second avoidance groove for avoiding the stop block is provided on the edge of the hinge cover plate, and the clamping block is provided at the position of the second avoidance groove.

[0024] Further, the number of the stop blocks is multiple, and the multiple stop blocks are evenly distributed on the edge of the mounting hole; the number of the clamping blocks is multiple, and the multiple clamping blocks are evenly distributed on the edge of the hinge cover plate.

[0025] Further, at least one positioning post is further provided at the edge of the mounting hole. A semi-circular positioning hole into which at least one positioning post can be clamped when the ring-shaped flange rotates is provided on the ring-shaped flange.

[0026] Further, the number of the positioning posts is multiple, and the number of the stop blocks is multiple. The multiple positioning posts and the multiple stop blocks are alternately and evenly distributed on the edge of the mounting hole.

[0027] Further, the shaving unit further includes a cover plate provided on the housing, a bracket provided on the cover plate, at least one cutter head assembly provided on the bracket, and a transmission structure provided in the enclosed space between the housing and the cover plate for driving the cutter head assembly.

[0028] Further, a flexible bracket that wraps around the second hinge is further included. The top of the flexible bracket is placed in the mounting hole. The first hinge is pressed on the top edge of the flexible bracket. The bottom of the flexible bracket is sleeved on the outer wall of the support member.

[0029] Further, an annular clamping groove is provided on the outer wall of the top of the support member, and the bottom of the flexible bracket is sleeved on the annular clamping groove.

[0030] The present invention also provides a razor, which includes a body and the above-mentioned cutter head floating structure provided on the body.

[0031] Advantages of the present invention:

[0032] For the cutter head floating structure provided by the present invention, the first hinge is fixed inside the shaving unit, and the first hinge and the shaving unit form an integral body; the second hinge is fixedly connected to the support member, and the first hinge and the second hinge are in a mating state through the first mating groove and the mating portion. A limiting structure is provided between the first hinge and the second hinge, and an elastic member is also provided. When the razor is working, when the shaving unit contacts the face and is squeezed by the force of the face, the shaving unit moves downward to squeeze the elastic member, and at the same time the first hinge also moves downward. When the downward force is greater than the elastic force of the elastic member, the elastic member is compressed. During this process, the anti-rotation limiting structure between the first hinge and the second hinge is separated so that the shaving unit can rotate around the center of the first mating groove with the first hinge, thereby realizing 360° rotation of the shaving unit. During the rotation process, the elastic member plays a flexible connection between the shaving unit and the support member, making the 360° rotation of the shaving unit smoother; and when the shaving unit acts on different parts of the face, the external force acting on the razor by the face changes. When the external force applied to the shaving unit decreases, that is, when the external force is less than the elastic force of the elastic member, the elastic member elastically returns upward to push the shaving unit, and the first hinge and the shaving unit move upward. The limiting structure between the first hinge and the second hinge is re-mated to prevent the relative rotation of the first hinge and the second hinge. During this process, the shaving unit floats up and down along the central axis L, and can better adapt to the change of the face curve, avoiding hard contact with the face, thereby bringing a more comfortable use experience to the user. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of the razor provided in the first embodiment of the present invention;

[0035] Figure 2 It is a side view of the cutter head floating structure in the razor provided in the first embodiment of the present invention;

[0036] Figure 3Longitudinal sectional view of the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0037] Figure 4 Schematic structural diagram of the first hinge in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0038] Figure 5 Schematic structural diagram of the second hinge in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0039] Figure 6 Exploded schematic diagram of the first hinge and the second hinge in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention before assembly;

[0040] Figure 7 Top view of the assembly of the first hinge and the second hinge in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0041] Figure 8 Longitudinal sectional view of the assembly of the first hinge and the second hinge in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention after assembly;

[0042] Figure 9 Schematic structural diagram of the support member in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0043] Figure 10 Schematic structural diagram of the hinge cover plate in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0044] Figure 11 Exploded schematic diagram of the hinge cover plate and the housing in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention before assembly;

[0045] Figure 12 Top view of the assembly of the hinge cover plate and the housing in the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0046] Figure 13 Exploded schematic diagram of the cutter head floating structure in the razor provided in Embodiment 1 of the present invention;

[0047] Figure 14 For Figure 11 Enlarged view at A in;

[0048] Figure 15 Exploded schematic diagram of the cutter head floating structure provided in Embodiment 2 of the present invention;

[0049] Figure 16 Longitudinal sectional view of the cutter head floating structure provided in Embodiment 2 of the present invention;

[0050] Among them, the reference numerals in the figures are as follows:

[0051] 100 - fuselage; 200 - cutter head floating structure; 210 - flexible bracket; 211 - annular convex edge; 220 - limiting structure; 300 - support member; 310 - mounting post; 320 - step surface; 330 - second central hole; 340 - second annular protrusion; 350 - annular card slot; 400 - shaving unit; 410 - housing; 411 - mounting hole; 412 - stop block; 413 - positioning post; 414 - card slot; 415 - limiting block; 420 - cover plate; 430 - bracket; 440 - cutter head assembly; 500 - first hinge; 510 - first mating groove; 511 - second limiting plane; 512 - positioning block; 513 - second connection hole; 514 - annular flange; 515 - first relief groove; 516 - semi-circular positioning hole; 517 - first spherical arc surface; 518 - first plane; 600 - second hinge; 610 - mating portion; 611 - first limiting plane; 612 - second plane; 620 - second mating groove; 621 - first central hole; 622 - first connection hole; 630 - connecting portion; 640 - positioning boss; 641 - semi-circular hole; 650 - depression; 700 - hinge cover plate; 710 - first annular protrusion; 720 - clamping block; 730 - second relief groove; 800 - elastic member; 900 - connecting member. Detailed implementation manners

[0052] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0054] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0055] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The cutter head floating structure provided by the embodiment of the present invention is mainly applied to a shaver, and the following will take the shaver as an example for detailed description. It should be noted that the cutter head floating structure can also be applied to other personal care products, such as hair clippers, hair removal clippers, and so on.

[0057] The cutter head floating structure provided by the embodiment of the present invention includes a support member, a shaving unit, a first hinge, a second hinge, and an elastic member. Among them, the shaving unit is disposed above the support member, the first hinge is disposed inside the shaving unit, the first hinge has a first mating groove, and the bottom of the first mating groove penetrates through the first hinge; for the second hinge, its top has a mating portion placed in the first mating groove, and a limiting structure for preventing relative rotation and separable along the central axis direction of the first mating groove is provided between the first mating groove and the mating portion. A first central hole penetrating to the bottom of the second hinge is provided in the mating portion, and the bottom of the second hinge passes through the first hinge and extends into and is fixed to the support member; and the elastic member is disposed through the first mating groove and the first central hole of the second hinge, the top end of the elastic member abuts against the shaving unit, and the bottom end of the elastic member abuts against the support member.

[0058] Based on the above cutter head floating structure, since the first hinge is provided inside the shaving unit, the first hinge and the shaving unit form an integral whole; and the second hinge is fixedly connected to the support member as an integral whole. The first hinge and the second hinge are in a mating state through the mating groove and the mating portion, which can also be regarded as the above two integral wholes being in a mating state. When the limiting structure is not provided, the two integral wholes can rotate relative to each other. In this way, when the razor is turned on but not shaving, the entire shaving unit is in a rotating state. This situation makes the shaving unit unstable and not convenient for shaving operations. Therefore, a limiting structure needs to be provided at the mating part between the two integral wholes, that is, between the first hinge and the second hinge. However, when a fixed limiting structure that keeps the relative position between the first hinge and the second hinge unchanged is provided, the first hinge and the second hinge cannot rotate. In this way, the flexibility of the shaving unit during shaving is poor, the contact with the skin is rigid, and the user experience is poor. In the embodiment of the present invention, an elastic member is provided between the first hinge and the second hinge. By pressing the first hinge, the limiting structure is separated in the axial direction of the first mating groove, and the separated limiting structure is re-mated by the elastic restoring force of the elastic member. In this way, during shaving, according to different shaving forces, the limiting structure is continuously separated and mated alternately, so that relative rotation or relative rest is achieved between the first hinge and the second hinge. And during the separation and mating process, the shaving unit floats in the stretching and contracting direction of the elastic member through the stretching and contracting of the elastic member, so that the user obtains a good shaving experience.

[0059] In practical applications, different embodiments can be used to implement the above structure. The cutter head floating structure will be described in detail below with reference to the accompanying drawings.

[0060] Embodiment 1

[0061] Reference Figures 1 to 3 As shown in [reference figure], the razor provided in Embodiment 1 of the present invention includes a body 100 and a cutter head floating structure 200 provided on the body 100. Among them, the cutter head floating structure 200 includes a support member 300, a shaving unit 400 provided above the support member 300, a first hinge 500 provided inside the shaving unit 400, a second hinge 600 that cooperates with the first hinge 500, and an elastic member 800. The top end of the second hinge 600 cooperates with the first hinge 500 and a non-rotating limiting structure 220 is provided therebetween, and the bottom end of the second hinge 600 is fixedly connected to the support member 300. Specifically, the first hinge 500 has a first mating groove 510 inside. The first mating groove 510 has a first spherical arc surface 517. The center of the first spherical arc surface 517 is O. The first mating groove 510 has a central axis L. The bottom of the first mating groove 510 penetrates through the first hinge 500, that is, the first hinge 500 is in a hollow shape.

[0062] The second hinge 600 has a mating portion 610 at its top, which is placed within the first mating groove 510. The mating portion 610 is spherical in shape, and the outer wall surface of the mating portion 610 matches the arc surface of the first spherical arc surface 517. In this way, when the mating portion 610 is placed within the first mating groove 510, the outer wall surface of the mating portion 610 can better fit with the first spherical arc surface 517. A limiting structure 220 for preventing relative rotation is provided between the mating portion 610 and the first mating groove 510. A second mating groove 620 is provided within the mating portion 610, and a first central hole 621 that penetrates through to the bottom of the second hinge 600 is provided at the bottom of the second mating groove 620. The bottom of the second hinge 600 passes through the first hinge 500 and extends into and is fixed to the support member 300. In this way, the second hinge 600 is integrally and fixedly connected to the support member 300.

[0063] Further, in this embodiment, the shaving unit 400 includes a housing 410 and a hinge cover plate 700. Among them, the housing 410 is integrally in a three-lobe shape and has a mounting hole 411 at the center. The first hinge 500 is fixed at the mounting hole 411 through the hinge cover plate 700, and the second hinge 600 that cooperates with the first hinge 500 extends out at the mounting hole 411 and is connected to the support member 300. The top end of the elastic member 800 abuts against the hinge cover plate 700. In this embodiment, the first hinge 500 is fixed at the mounting hole 411 through the hinge cover plate 700. In other embodiments, the hinge cover plate 700 can also be omitted, and the first hinge 500 can be fixed at the mounting hole 411 by using its own structural design or other components.

[0064] The elastic member 800 passes through the first central hole 621, the second mating groove 620, and the first mating groove 510 of the second hinge 600. Moreover, the top end of the elastic member 800 abuts against the bottom of the hinge cover plate 700, and the bottom end of the elastic member 800 abuts against the top of the support member 300.

[0065] In the non-operating state, the elastic force of the elastic member 800 pushes the hinge cover plate 700 and the support member 300 in opposite directions along the central axis L, so that the first hinge 500 fixedly connected to the hinge cover plate 700 and the second hinge 600 fixedly connected to the support member 300 fit more closely with spherical arc surfaces.

[0066] When the shaver is working, when the shaving unit 400 contacts the face and is squeezed by the force of the face, the shaving unit 400 drives the hinge cover plate 700 to move downward to squeeze the elastic member 800. At the same time, the first hinge 500 also moves downward. When the downward force is greater than the elastic force of the elastic member 800, the elastic member 800 is compressed. During this process, the anti-rotation limiting structure 220 between the first hinge 500 and the second hinge 600 is separated so that the hinge cover plate 700 and the shaving unit 400 can rotate around the center O of the first spherical arc surface 517 with the first hinge 500, thereby realizing the rotation of the shaving unit 400 within a range of 360°. During the rotation process, the elastic member 800 plays a flexible connection between the shaving unit 400 and the support member 300, making the 360° rotation of the shaving unit 400 smoother; and when the shaving unit 400 acts on different parts of the face, the external force acting on the shaver by the face changes. When the external force applied to the shaving unit 400 decreases, that is, when the external force is less than the elastic force of the elastic member 800, the elastic member 800 elastically returns upward to push the hinge cover plate 700, the first hinge 500 and the shaving unit 400 move upward, and the limiting structure 220 between the first hinge 500 and the second hinge 600 re-cooperates to prevent the relative rotation of the first hinge 500 and the second hinge 600. During this process, the shaving unit 400 floats up and down along the central axis L, which can better adapt to the change of the face curve and avoid hard contact with the face, thereby bringing a more comfortable shaving experience to the user.

[0067] Further, in order to facilitate the non-relative rotation between the first hinge 500 and the second hinge 600, and at the same time, when the first hinge 500 and the second hinge 600 are separated, the limiting structure 220 does not block the rotation of the first hinge 500. In this embodiment, the limiting structure 220 is designed simply and ingeniously, which can prevent rotation in the circumferential direction and does not affect separation in the axial direction.

[0068] Specifically, referring to Figures 4 to 8 , the limiting structure 220 includes a first limiting plane 611 provided on the outer wall surface of the mating portion 610 and a second limiting plane 511 provided in the first mating groove 510 and capable of fitting with the first limiting plane 611. Since both the first spherical arc surface 517 and the outer wall surface of the mating portion 610 are spherical arc surfaces, there is no friction and no resistance when they are directly mated and can rotate with each other. And the first limiting plane 611 and the second limiting plane 511 are in plane contact. When the first hinge 500 and the mating portion 610 rotate relative to each other, the first limiting plane 611 and the second limiting plane 511 cannot rotate due to the frictional force between the two planes, thereby realizing limiting in the circumferential direction. At the same time, the fitting of the two planes in the axial direction does not prevent the upward or downward movement of the first hinge 500.

[0069] Specifically, the first limiting plane 611 can be regarded as a plane formed by longitudinally cutting the outer wall surface of the fitting portion 610. Since the first spherical arc surface 517 is an arc surface, in order to facilitate the setting of the second limiting plane 511, a positioning block 512 is arranged in the first fitting groove 510, and the second limiting plane 511 is arranged on the inner side of the positioning block 512 facing the center of the first fitting groove 510. In this embodiment, the positioning block 512 has a cubic block structure, and the second limiting plane 511 is a surface on the inner side of the cube.

[0070] In this embodiment, there are three first limiting planes 611, and the three first limiting planes 611 are evenly distributed on the outer wall surface of the fitting portion 610; there are three second limiting planes 511, and the three second limiting planes 511 are evenly arranged in the first fitting groove 510. Through the fitting of the three groups of planes, the first hinge 500 and the second hinge 600 can be well limited. Moreover, since the top surface of the cubic positioning block 512 is also a plane, in this way, a triangular arrangement is formed among the three positioning blocks 512, and the top surfaces of the three positioning blocks 512 form a stable support surface for more reliably supporting the hinge cover plate 700. Of course, the number of the first limiting plane 611 and the second limiting plane 511 can also be one, two, four, or more, etc.

[0071] In this embodiment, when the second hinge 600 is fixedly connected to the support member 300 as a whole, the two are assembled and fixed through the connecting member 900. Through the assembly of the connecting member 900, the fixed connection between the second hinge 600 and the support member 300 is detachable, so that it is convenient for disassembly and repair and also convenient for assembly during product production. Of course, on the premise of ensuring the reliable connection between the second hinge 600 and the support member 300, in other embodiments, other detachable fixed connection methods, such as snap connection, etc., can also be adopted.

[0072] Specifically, a first connection hole 622 is arranged in the second fitting groove 620 of the fitting portion 610 of the second hinge 600, and a second connection hole 513 corresponding to the first connection hole 622 is arranged in the first fitting groove 510 that fits with the fitting portion 610. The connecting member 900 is specifically a screw. And an installation post 310 is arranged in the support member 300, and a screw hole (not labeled in the figure) is arranged in the installation post 310. The screw passes through the first connection hole 622 and the second connection hole 513 and is screwed into the screw hole of the installation post 310. The method of screwing the screw is used to fix the second hinge 600, and the structure is simple, convenient for processing, and easy to assemble.

[0073] Such as Figure 9As shown, the support member 300 is generally cylindrical in structure. Its top has a stepped surface 320 that is recessed inward. A second central hole 330 that penetrates the support member 300 is provided on the stepped surface 320. The mounting post 310 is provided on the stepped surface 320. In this way, the depth of the downward recess of the stepped surface 320 fills the height of the mounting post 310, preventing the mounting post 310 from protruding above the top surface of the support member 300 and occupying more space or forming a connection gap.

[0074] Further, there are three first connection holes 622, correspondingly three second connection holes 513, three mounting posts 310, and three connecting members 900. The three connecting members 900 are arranged in a triangle to fix and connect the second hinge 600 and the support member 300 more firmly. Moreover, for the second hinge 600, the number of first limiting planes 611 provided thereon is the same as that of the first connection holes 622, both being three. The first connection holes 622 and the first limiting planes 611 are alternately arranged at intervals. That is, a first connection hole 622 is provided between two first limiting planes 611, and a first limiting plane 611 is provided between two first connection holes 622.

[0075] In this embodiment, the top of the second hinge 600 is a mating portion 610, and the bottom has a connecting portion 630. The connecting portion 630 is specifically a cylindrical structure. The diameter of the cylinder is slightly larger than the bottom diameter of the mating portion 610. Since the inner wall surface of the second spherical arc surface in the ball head gradually increases from bottom to top, the diameter of the cylinder is designed to be slightly larger than the bottom diameter of the mating portion 610. In this way, on the one hand, the small size of the second hinge 600 part is maintained, and on the other hand, when the connecting member 900 passes through the mating portion 610 from the first connection hole 622, it can pass through the connecting portion 630, so that the connecting member 900 connects the mating portion 610 and the connecting portion 630 of the second hinge 600 into a whole, preventing the situation of instability caused by the separation of the connecting portion 630 when only the mating portion 610 is connected to the support member 300. Specifically, a positioning structure for limiting the connecting member 900 is provided at the position corresponding to the first connection hole 622 on the connecting portion 630.

[0076] Specifically, as Figure 5 shown, the positioning structure includes a positioning boss 640 provided on the outer wall of the connecting portion 630 through which the connecting member 900 can pass, and a recess 650 located below the positioning boss 640 and arranged along the height direction of the connecting portion 630 for accommodating the connecting member 900. In this embodiment, a semi-circular hole 641 is provided on the positioning boss 640 for the connecting member 900 to pass through. A circular hole can also be provided, or the positioning boss 640 can be directly designed as a positioning ring for the connecting member 900 to pass through.

[0077] In this embodiment, the elastic member 800 is preferably a spring. The spring is arranged in a pre-compressed state between the hinge cover plate 700 and the support member 300. The installation structure of the spring is as Figure 3, Figure 9 As shown in the figure. A first annular protrusion 710 is formed around the center hole at the bottom center of the hinge cover plate 700. At the same time, a second annular protrusion 340 is provided on the stepped surface 320 of the support member 300 and at the edge of the center hole. The top of the spring is sleeved on the first annular protrusion 710, and the bottom of the spring is sleeved on the second annular protrusion 340. In other embodiments, concave holes may also be respectively provided on the bottom of the hinge cover plate 700 and the stepped surface 320 of the support member 300, and both ends of the spring are respectively arranged in the concave holes.

[0078] In other embodiments, the spring can also be replaced by other elastic components that can be contracted and reset, such as elastic sheets.

[0079] Referring to Figures 11 to 13 , the shaving unit 400 further includes a cover plate 420 provided on the housing 410, a bracket 430 provided on the cover plate 420, at least one cutter head assembly 440 (in this embodiment, there are three cutter head assemblies 440) provided on the bracket 430, and a transmission structure (not shown in the figure) provided in the enclosed space between the housing 410 and the cover plate 420 for driving the cutter head assembly 440.

[0080] Please refer to Figure 4 again. A circular flange 514 extends outward from the edge of the first mating groove 510 of the first hinge 500. During installation, the circular flange 514 is stacked on the edge of the mounting hole 411. At least one stopper 412 is provided at the edge of the mounting hole 411. A first avoidance groove 515 is provided on the circular flange 514 corresponding to the stopper 412. The hinge cover plate 700 is covered on the first mating groove 510, and at least one engaging block 720 that can be engaged with the stopper 412 protrudes outward from the edge of the hinge cover plate 700. In this way, through the engagement of the engaging block 720 and the stopper 412, the hinge cover plate 700 is fixed to the housing 410. At the same time, since the hinge cover plate 700 is covered on the first hinge 500, the first hinge 500 is limited between the housing 410 and the hinge cover plate 700, connecting the first hinge 500, the housing 410, and the hinge cover plate 700 into a whole.

[0081] When the first hinge 500 is installed, for quick positioning, at least one positioning post 413 is further provided at the edge of the mounting hole 411, and a semi-circular positioning hole 516 into which at least one positioning post 413 can be inserted when the circular flange 514 rotates is provided on the circular flange 514. The positioning post 413 and the semi-circular positioning hole 516 not only play a positioning role but also can support and position the transmission structure in the housing 410.

[0082] Furthermore, referring to Figure 14, the position of the stopper 412 is higher than the edge of the mounting hole 411. In this way, the gap between the stopper 412 and the edge of the mounting hole 411 forms a card slot 414 into which the clamping block 720 can be inserted when it rotates horizontally. A limiting block 415 is provided on one side of the card slot 414. When the clamping block 720 rotates a certain angle in the card slot 414, it abuts against the limiting block 415 and stops rotating. At this time, the hinge cover plate 700 is installed in place. At the same time, in order to facilitate the rotation of the hinge cover plate 700, a second avoidance groove 730 for avoiding the stopper 412 is also provided at the edge of the hinge cover plate 700, and the clamping block 720 is arranged at the second avoidance groove 730. In this way, during installation, first cover the hinge cover plate 700 on the first hinge 500. Specifically, place the hinge cover plate 700 on the top surfaces of the three positioning blocks 512, align the second avoidance groove 730 with the clamping block 720, and then rotate the hinge cover plate 700 so that the clamping block 720 rotates into the card slot 414 until it abuts against the limiting block 415, and the installation of the hinge cover plate 700 is completed. At this time, the card slot 414 limits the clamping block 720 in the direction of the central axis L, and the rotation angle of the clamping block 720 is limited by the limiting block 415 and the second avoidance groove 730 in the circumferential direction.

[0083] Preferably, in this embodiment, there are three stoppers 412, and the three stoppers 412 are evenly distributed on the edge of the mounting hole 411. There are also three positioning posts 413, and the three positioning posts 413 and the three stoppers 412 are alternately spaced and evenly distributed on the edge of the mounting hole 411. That is, a stopper 412 is arranged between two positioning posts 413, and a positioning post 413 is arranged between two stoppers 412. Such an alternately spaced structure makes the fixation of the first hinge 500 more stable and reliable.

[0084] In this embodiment, the hinge cover plate 700 is fixed in a detachable manner by screwing and snapping as described above. In other embodiments, the hinge cover plate 700 can also be fixed by screws, glue bonding, or ultrasonic welding, etc.

[0085] Please refer to again Figure 3 , Figure 9 and Figure 13, in this embodiment, the cutter head floating structure 200 further includes a flexible bracket 210. The flexible bracket 210 is wrapped around the outside of the second hinge 600. That is, the flexible bracket 210 has a hollow cylindrical structure, and the second hinge 600 is located inside the hollow structure of the flexible bracket 210. Specifically, the top of the flexible bracket 210 also extends outward to form an annular convex edge 211. The annular convex edge 211 is placed at the edge of the mounting hole 411, and the annular flange 514 of the first hinge 500 is pressed on the annular convex edge 211. An annular groove 350 is provided on the outer wall of the top of the support member 300, and the bottom of the flexible bracket 210 is sleeved on the annular groove 350 of the support member, so as to realize the fixation of the top and the bottom of the flexible bracket 210. The flexible bracket 210 is provided here to shield the exposed part between the housing 410 and the support member 300, improve the appearance effect of the razor, protect the internal components, and also play a certain supporting role for the shaving unit 400.

[0086] Embodiment Two

[0087] Refer to Figure 15 、 Figure 16 , the cutter head floating structure 200 provided in the second embodiment of the present invention is substantially the same as the cutter head floating structure 200 in the first embodiment, the difference being that the shapes of the first mating groove 510 and the mating portion 610 are different. Specifically, in this embodiment, the first mating groove 510 has a first plane 518, and the first plane extends horizontally inward along the bottom edge of the first mating groove 510. The surface of the mating portion 610 has a second plane 612 that mates with the first plane 518. The second plane 612 is the bottom plane of the mating portion 610. When the mating portion 610 of the second hinge 600 extends into the first mating groove 510 of the first hinge 500, the second plane 612 of the mating portion 610 is stacked on the first plane 518 in the first mating groove 510. When the limiting structure 220 is separated, the second plane 612 and the first plane 518 can rotate relative to each other, so that the relative rotation between the first hinge 500 and the second hinge 600 can also be realized, and the requirement that the shaving unit 400 rotates within 360° in the first embodiment can also be realized.

[0088] Other structures not listed in this embodiment are basically the same as those in the first embodiment and will not be elaborated here.

[0089] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutter head floating structure, characterized in that: It includes, a support member; a shaving unit, provided above the support member; a first hinge, provided inside the shaving unit, the first hinge has a first mating groove inside, and the bottom of the first mating groove penetrates through the first hinge; a second hinge, the top of which has a mating portion placed inside the first mating groove, a limiting structure for preventing relative rotation and separable along the central axis direction of the first mating groove is provided between the first mating groove and the mating portion, a first central hole penetrating to the bottom of the second hinge is provided inside the mating portion, and the bottom of the second hinge passes through the first hinge and extends into and is installed in the support member; an elastic member, passing through the first mating groove and the first central hole of the second hinge, the top end of the elastic member abuts against the shaving unit, and the bottom end of the elastic member abuts against the support member; the elastic member is a spring.

2. The cutter head floating structure according to claim 1, characterized in that: The shaving unit includes a housing and a hinge cover plate, the housing has a mounting hole, the first hinge is fixed to the mounting hole through the hinge cover plate, the second hinge extends out at the mounting hole and is fixedly connected to the support member, and the top end of the elastic member abuts against the hinge cover plate.

3. The cutter head floating structure according to claim 1, characterized in that: The first mating groove has a first spherical arc surface inside, and the surface of the mating portion has a second spherical arc surface that mates with the first spherical arc surface; alternatively, the first mating groove has a first plane inside, and the surface of the mating portion has a second plane that mates with the first plane.

4. The cutter head floating structure according to any one of claims 1 to 3, characterized in that: The limiting structure includes a first limiting plane provided on the outer surface of the mating portion and a second limiting plane provided inside the first mating groove and capable of fitting with the first limiting plane.

5. The cutter head floating structure according to claim 4, characterized in that: A positioning block is provided inside the first mating groove, and the second limiting plane is provided inside the positioning block and faces the center of the first mating groove.

6. The cutter head floating structure according to claim 4, characterized in that: There are multiple first limiting planes, and the multiple first limiting planes are evenly distributed on the outer wall surface of the mating portion; there are multiple second limiting planes, and the multiple second limiting planes are evenly arranged inside the first mating groove.

7. The cutter head floating structure according to claim 1, characterized in that: The second hinge is fixedly connected to the support member through a connecting piece.

8. The cutter head floating structure according to claim 7, characterized in that: A second mating groove is provided on the mating portion, at least one first connection hole penetrating through is provided on the wall of the second mating groove, at least one second connection hole corresponding to and penetrating through is provided on the wall of the first mating groove, a mounting post is provided inside the support member, and the connecting piece is a screw passing through the first connection hole and the second connection hole and extending into the mounting post.

9. The cutter head floating structure according to claim 8, characterized in that: The bottom of the second hinge has a connecting portion, and a positioning structure for limiting the connecting member is provided at a position corresponding to the first connecting hole on the connecting portion.

10. The tool bit floating structure according to claim 9, wherein: The positioning structure includes a positioning boss provided on the outer wall of the connecting portion through which the connecting member can pass, and a recess located below the positioning boss and arranged along the height direction of the connecting portion for accommodating the connecting member.

11. The tool bit floating structure according to claim 8, wherein: The top of the support member has a stepped surface recessed inward, a second central hole penetrating the support member is provided on the stepped surface, the mounting post is arranged on the stepped surface, a ring-shaped protrusion is provided on the stepped surface and at the edge of the second central hole, and the bottom of the elastic member is sleeved on the ring-shaped protrusion.

12. The tool bit floating structure according to any one of claims 8 to 11, wherein: The limiting structure includes a first limiting plane provided on the outer surface of the mating portion, the number of the first limiting planes is multiple, the number of the first connecting holes is the same as the number of the first limiting planes, and one of the first connecting holes is arranged between two of the first limiting planes.

13. The tool bit floating structure according to claim 2, wherein: At least one stop block is provided at the edge of the mounting hole, a ring-shaped flange is formed by outward extension of the edge of the first mating groove, the ring-shaped flange is placed at the edge of the mounting hole, a first avoidance groove is provided on the ring-shaped flange corresponding to the stop block, the hinge cover plate is covered in the first mating groove, and at least one locking block that can be locked at the stop block is provided on the edge of the hinge cover plate.

14. The tool bit floating structure according to claim 13, wherein: A card slot into which the locking block can be inserted when horizontally rotating is provided between the stop block and the edge of the mounting hole, a limiting block for resisting the locking block is provided on one side of the card slot, a second avoidance groove for avoiding the stop block is provided on the edge of the hinge cover plate, and the locking block is arranged at the second avoidance groove.

15. The tool bit floating structure according to claim 13 or 14, wherein: There are multiple stop blocks, and the multiple stop blocks are evenly distributed on the edge of the mounting hole; there are multiple locking blocks, and the multiple locking blocks are evenly distributed on the edge of the hinge cover plate.

16. The tool bit floating structure according to claim 13, wherein: At least one positioning post is further provided at the edge of the mounting hole, and a semi-circular positioning hole into which at least one of the positioning posts can be inserted when the ring-shaped flange rotates is provided on the ring-shaped flange.

17. The tool bit floating structure according to claim 16, wherein: There are multiple positioning posts and multiple stop blocks, and the multiple positioning posts and the multiple stop blocks are alternately spaced and evenly distributed on the edge of the mounting hole.

18. The tool bit floating structure according to claim 2, wherein: The shaving unit further includes a cover plate provided on the housing, a bracket provided on the cover plate, at least one cutter head assembly provided on the bracket, and a transmission structure provided in the enclosed space between the housing and the cover plate for driving the cutter head assembly.

19. The cutter head floating structure according to claim 18, wherein: it further includes a flexible bracket wrapped around the second hinge, the top of the flexible bracket is placed in the mounting hole, the first hinge is pressed on the top edge of the flexible bracket, and the bottom of the flexible bracket is sleeved on the outer wall of the support member.

20. The cutter head floating structure according to claim 19, wherein: a circular groove is provided on the outer wall of the top of the support member, and the bottom of the flexible bracket is sleeved on the circular groove.

21. A shaving razor, including a body, wherein: it further includes the cutter head floating structure according to any one of claims 1 to 20 provided on the body.

Images