WO2020177208A1

WO2020177208A1 - Blade floating structure and personal care device

Info

Publication number: WO2020177208A1
Application number: PCT/CN2019/085016
Authority: WO
Inventors: 孟凡迪; 邱云峰
Original assignee: 舒可士（深圳）科技有限公司
Priority date: 2019-03-07
Filing date: 2019-04-29
Publication date: 2020-09-10
Also published as: CN109968412A; CN109968412B

Abstract

A blade floating structure (200) and a personal care device. The blade floating structure (200) comprises a cutting unit (400); a first hinge (500) connected to the cutting unit (400), a first fitting recess (510) being provided in the first hinge (500); a second hinge (600), whereof the top is provided with a fitting portion (610) placed in the first fitting recess (510), and the bottom extends through the first hinge (500) in a direction away from the cutting unit (400); and a limiting structure (220) configured to prevent relative rotation of the first hinge (500) and the second hinge (600).When the cutting unit (400) is pressed by the skin, the cutting unit (400) floats within 360 degrees, and when the pressure is reduced, the limiting structure (220) prevents the relative rotation of the first hinge (500) and the second hinge (600), thereby achieving the upward and downward floating of the cutting unit (400).

Description

Floating structure of cutter head and personal care device

Technical field

This application relates to the technical field of personal care products, and in particular provides a floating structure for a cutter head and a personal care device.

Background technique

In the field of personal care products, such as electric personal care devices, most of the cutting unit and the supporting structure are fixedly connected, that is, the cutting unit cannot move relative to the supporting structure, and the cutter head assembly on the cutting unit has an internal transmission structure Drive down to rotate for shaving operation. Although this structure achieves the need for shaving, when the cutting unit moves on the surface of the skin, there is a blunt resistance between the cutting unit and the skin. It is completely dependent on the human hand grip to adjust the shaving strength. When the unit is in tight contact with the skin, press the personal care device a little bit loosely with human hands, otherwise, press a little tighter. During the whole shaving process, the hands are in a tense state. After the shave is completed, you may feel sore. The experience is extremely poor.

In order to solve this problem, some cutting units use cross universal joints to realize rotation with the supporting structure, but such structure assembly is cumbersome, the defect rate increases, and the rotation structure is not flexible and has not been fundamentally solved. The adaptive capability between the cutting unit and the skin cannot provide a good user experience.

In addition, the patent No. 201810828791.5 proposed a floating structure for the cutter head, which includes a shaving unit, a first hinge, a second hinge and a spring, and the shaving unit is floated up and down during the shaving process through the spring. However, this structure requires a spring and is complicated in structure, resulting in a complicated structure, complicated assembly and high cost of the entire shaver.

technical problem

The purpose of this application is to provide a cutter head floating structure, which aims to solve the technical problems of complicated structure, complicated assembly and high cost of realizing the up and down floating structure of the cutting unit in the personal care device in the prior art through the spring.

Technical solutions

This application provides a floating structure for a cutter head, including:

Cutting unit

A first hinge connected to the cutting unit, the first hinge has a first matching groove therein, and the bottom of the first matching groove penetrates the first hinge;

The top of the second hinge has a mating part placed in the first mating groove, and the mating part and the first mating groove can be separated in the axial direction under the action of external force, and the bottom of the second hinge Extend through the first hinge in a direction away from the cutting unit;

The limiting structure is used to prevent the first hinge and the second hinge from rotating mutually.

Preferably, the first hinge is a plastic part that can be elastically deformed.

Further, the cutting unit includes a housing and a hinge cover, the housing has a mounting hole, the first hinge is provided at the mounting hole, and the top of the first hinge is pressed and fixed by the hinge cover .

Further, the first matching groove has a first spherical arc surface, and the surface of the matching portion has a second spherical arc surface that matches with the first spherical arc surface; or, the first matching groove has a first spherical arc surface. A flat surface, and the surface of the matching portion has a second flat surface that matches with the first flat surface.

Further, the limiting structure includes a first limiting plane provided on the outer surface of the mating portion and a second limiting plane provided in the first matching groove and capable of being attached to the first limiting plane .

Further, a positioning block is provided in the first matching groove, and the second limiting plane is disposed on the inner side of the positioning block and facing the center of the first matching groove.

Preferably, the cutting unit includes a housing and a flexible bracket, the housing has a mounting hole, the first hinge is placed at the mounting hole, and the flexible bracket is wrapped outside the second hinge.

Further, the first hinge is pressed on the top edge of the flexible bracket, the top of the flexible bracket is placed in the mounting hole, and the bottom of the flexible bracket is sleeved on the outer wall of the second hinge.

Further, the limiting structure includes a limiting convex portion provided on the flexible support and a limiting concave portion provided on the first hinge and matched with the limiting convex portion.

The present application also provides a personal care device, which includes a body, and also includes the above-mentioned knife head floating structure provided on the body.

Beneficial effect

The beneficial effect of the folding buckle provided by the present application is that since the first hinge is connected to the cutting unit, the first hinge and the cutting unit form a whole; and the second hinge is used as another whole alone, and the first hinge and the second hinge pass through the first hinge and the second hinge. A matching groove and the matching part are in a matching state, which can also be regarded as the above two wholes in a matching state. When the limit structure is not provided, the two wholes can be rotated relative to each other. In this way, for the entire personal care device, it is not turned on. When shaving, the entire cutting unit is in a rotating state, which makes the cutting unit unstable and inconvenient for the shaving operation; therefore, it is necessary to provide a limit structure for limiting the mutual rotation of the first hinge and the second hinge, but when After setting a fixed limit structure that keeps the relative position between the first hinge and the second hinge unchanged, the first hinge and the second hinge cannot rotate between the first hinge and the second hinge, so that the cutting unit has poor flexibility when shaving, and it is rigid in contact with the skin. Poor experience. In the embodiment of the present application, the first hinge and the second hinge are set to be separable up and down, that is, by pressing the first hinge, the first fitting groove and the fitting portion are separated in the axial direction of the first fitting groove. The hinge and the cutting unit as a whole can float in the gap between the first hinge and the second hinge under the action of the force of the face, and when the external force is reduced or disappeared, it can be manually operated, the first hinge itself can be elastic or other structures The self-elasticity realizes the re-fitting of the first matching groove and the matching part, or the first matching groove and the matching part can slowly resume the cooperation through the interaction of the contact surface between the two. In this way, when shaving, according to the different shaving strength, The first matching groove and the matching part are continuously alternately separated and matched, so that the first hinge and the second hinge can rotate or be relatively stationary, so that the user can obtain a good shaving experience. In addition, since the floating structure of the cutter head omits a spring, the structure is simple, the assembly is simple, and the cost is reduced.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative labor.

FIG. 1 is a schematic diagram of the structure of a personal care device provided in Embodiment 1 of the application;

2 is a side view of the floating structure of the cutter head in the personal care device provided in the first embodiment of the application;

3 is a longitudinal sectional view of the floating structure of the cutter head in the personal care device according to the first embodiment of the application;

4 is a schematic structural diagram of the first hinge in the floating structure of the cutter head in the personal care device according to the first embodiment of the application;

5 is a schematic structural diagram of the second hinge in the floating structure of the cutter head in the personal care device according to the first embodiment of the application;

6 is an exploded schematic diagram of the first hinge and the second hinge in the floating structure of the cutter head in the personal care device provided in the first embodiment of the application before assembly;

7 is a top view of the assembly of the first hinge and the second hinge in the floating structure of the cutter head in the personal care device according to the first embodiment of the application;

8 is a longitudinal cross-sectional view of the first hinge and the second hinge in the floating structure of the cutter head in the personal care device provided in the first embodiment of the application;

9 is a schematic structural diagram of the hinge cover in the floating structure of the cutter head in the personal care device according to the first embodiment of the application;

FIG. 10 is an exploded schematic view of the hinge cover plate and the housing in the floating structure of the cutter head in the personal care device provided in the first embodiment of the application before assembly;

11 is a top view of the assembly of the hinge cover and the housing in the floating structure of the cutter head in the personal care device according to the first embodiment of the application;

12 is an exploded schematic diagram of the floating structure of the cutter head in the personal care device provided in the first embodiment of the application;

Figure 13 is an enlarged view of A in Figure 10;

14 is an exploded schematic diagram of the floating structure of the cutter head provided in the second embodiment of the application;

15 is a longitudinal cross-sectional view of the floating structure of the cutter head provided in the second embodiment of the application.

Among them, the reference signs in the figure:

100-airframe; 200-knife head floating structure; 210-flexible support; 211-annular flange; 220-limiting structure; 400-cutting unit; 410-housing; 411-mounting hole; 412-stop block; 413 -Positioning post; 414-card slot; 415-limit block; 420-cover plate; 430-bracket; 440-cutter head assembly; 500-first hinge; 510-first mating groove; 511-second limit plane 512-locating block; 514-ring flange; 515-first avoidance groove; 516-semi-circular positioning hole; 517-first spherical arc surface; 518-first plane; 600-second hinge; 610 -Mating part; 611-First limit plane; 612-Second plane; 620-Second matching groove; 621-First central hole; 630-Connecting part; 640-Annular slot; 700-Hinge cover; 720 -Card block; 730-Second avoidance slot.

Embodiments of the invention

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the application, but should not be understood as a limitation to the application.

In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, not It indicates or implies that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "multiple" means two or more than two, unless otherwise specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of 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 this application can be understood according to specific circumstances.

The cutter head floating structure provided in the embodiments of the present application is mainly applied to personal care devices, and the following takes the personal care device as an example for detailed description. It should be noted that the floating structure of the cutter head can also be applied to other personal care products, such as barber scissors, shaving scissors and so on.

The cutter head floating structure provided by the embodiment of the present application includes a cutting unit, a first hinge, a second hinge, and a limiting structure. Wherein, the first hinge is connected with the cutting unit, the first hinge has a first matching groove, and the bottom of the first matching groove penetrates the first hinge; the top of the second hinge has a matching part placed in the first matching groove, and Under the action of external force, the mating portion and the first mating groove can be separated along the axial direction of the first mating groove, and the bottom of the second hinge extends away from the cutting unit through the first hinge; and the limiting structure is used to define the first mating groove Rotate around its central axis.

Based on the above-mentioned floating structure of the cutter head, since the first hinge is fixedly connected to the cutting unit, the first hinge and the cutting unit form a whole; while the second hinge is used as another whole alone, and the first hinge and the second hinge pass through the first matching groove In the mating state with the mating part, it can also be regarded as the above-mentioned two whole bodies in the mating state. When the limit structure is not provided, the two whole bodies can rotate relative to each other. In this way, for the entire personal care device, when it is turned on and not shaving , The entire cutting unit is in a rotating state, which makes the cutting unit unstable and inconvenient for the shaving operation; therefore, it is necessary to provide a limit structure for limiting the mutual rotation of the first hinge and the second hinge, but when a fixed After the limit structure that keeps the relative position between the first hinge and the second hinge unchanged, the first hinge and the second hinge cannot rotate between the first hinge and the second hinge, so that the cutting unit has poor flexibility when shaving, and it is rigid in contact with the skin, and the use experience is poor. In the embodiment of the present application, the first hinge and the second hinge are set to be separable up and down, that is, by pressing the first hinge, the first fitting groove and the fitting portion are separated in the axial direction of the first fitting groove. The hinge and the cutting unit as a whole can float in the gap between the first hinge and the second hinge under the action of the force of the face, and when the external force is reduced or disappeared, it can be manually operated, the first hinge itself can be elastic or other structures The self-elasticity realizes the re-fitting of the first matching groove and the matching part, or the first matching groove and the matching part can slowly resume the cooperation through the interaction of the contact surface between the two. In this way, when shaving, according to the different shaving strength, The first matching groove and the matching part are continuously alternately separated and matched, so that the first hinge and the second hinge can rotate or be relatively stationary, so that the user can obtain a good shaving experience. In addition, since the floating structure of the cutter head omits a spring, the structure is simple, the assembly is simple, and the cost is reduced.

In practical applications, the above-mentioned structure can be implemented by different embodiments. The floating structure of the cutter head will be described in detail below in conjunction with the accompanying drawings.

Example one

1 to 3, the personal care device provided in the first embodiment of the present application includes a body 100 and a knife head floating structure 200 provided on the body 100. The cutter head floating structure 200 includes a cutting unit 400, a first hinge 500 fixedly connected to the cutting unit 400, a second hinge 600 matched with the first hinge 500, and a limiting structure 220. The top end of the second hinge 600 is matched with the first hinge 500, and the bottom end of the second hinge 600 is fixedly connected to the body 100. Specifically, the first hinge 500 has a first mating groove 510, and the first mating groove 510 has a first spherical arc surface 517. The center of the first spherical arc surface 517 is O, and the first matching groove 510 has a central axis L. , The bottom of the first matching groove 510 penetrates the first hinge 500, that is, the first hinge 500 is hollow.

The second hinge 600 has a matching part 610 placed in the first matching groove 510 at its top. The matching part 610 is in the shape of a ball. The outer wall of the matching part 610 matches the arc of the first spherical arc 517. In this way, the matching part When the 610 is placed in the first matching groove 510, the outer wall surface of the matching portion 610 can better fit the first spherical arc surface 517. In addition, the mating portion 610 and the first mating groove 510 can be separated along the central axis L under the action of external force, and the limiting structure 220 can prevent the first hinge 500 and the second hinge 600 from rotating mutually. The mating portion 610 is provided with a second mating groove 620, the bottom of the second mating groove 620 is provided with a first central hole 621 penetrating to the bottom of the second hinge 600, and the bottom of the second hinge 600 penetrates the first hinge 500 and is fixed to The fuselage 100, in this way, the second hinge 600 is fixedly connected to the fuselage 100 as a whole.

Furthermore, in this embodiment, the cutting unit 400 includes a housing 410 and a hinge cover 700. The housing 410 has a three-petal shape as a whole with a mounting hole 411 in the center. The first hinge 500 is provided at the mounting hole 411. The top of the first hinge 500 is pressed and fixed by the hinge cover plate 700, and the first hinge 500 is matched with the first hinge 500. The two hinge 600 extends from the mounting hole 411 and is connected to the main body 100. In this embodiment, the first hinge 500 is fixed at the mounting hole 411 through the hinge cover 700. In other embodiments, the hinge cover 700 may also be omitted, and the first hinge 500 may be fixed at the mounting hole 411 by its own structural design or other parts.

In the non-working state, the first hinge 500 and the second hinge 600 are attached to each other in a spherical arc surface.

Preferably, in this embodiment, the first hinge 500 is a plastic part that can be elastically deformed. When the top of the first hinge 500 is squeezed by an external force, the first hinge 500 is elastically deformed. When the external force disappears, the first hinge 500 The hinge 500 returns to its original shape.

When the personal care device is working, when the cutting unit 400 contacts the face and is squeezed by the force of the face, the cutting unit 400 drives the hinge cover 700 to move downward, and at the same time applies pressure to the top of the first hinge 500 to make the first hinge 500 During this process, the limiting structure 220 is separated so that the hinge cover 700 and the cutting unit 400 can rotate with the first hinge 500 around the center O of the first spherical arc 517, so that the cutting unit 400 can be rotated at 360 °Floating within the range. During the rotation, due to the elastic deformation of the first hinge 500, the top end of the first hinge 500 can float up and down, making the floating of the cutting unit 400 within the range of 360° smoother; and when the cutting unit 400 acts on different parts of the face When the external force of the face reacting to the personal care device changes, when the external force applied to the cutting unit 400 decreases, that is, the external force is less than the elastic force of the first hinge 500, the first hinge 500 elastically returns to push the hinge cover 700 upward, and the hinge The cover 700 and the cutting unit 400 move upwards, and the limiting structure 220 re-fits to prevent the first hinge 500 and the second hinge 600 from rotating relative to each other. During this process, the cutting unit 400 floats up and down along the central axis L, which can better adapt to the curve of the face Change to avoid hard contact with the face, thereby bringing users a more comfortable shaving experience.

Further, in order to facilitate the restriction between the first hinge 500 and the second hinge 600 to be unable to rotate with each other, and to facilitate the separation of the first hinge 500 and the second hinge 600, the restriction structure 220 does not block the rotation of the first hinge 500, In this embodiment, the limiting structure 220 is provided between the first hinge 500 and the second hinge 600. The limiting structure 220 is simple and ingenious in design, which not only prevents the rotation in the circumferential direction, but also does not affect the separation in the axial direction.

Specifically, referring to FIGS. 4 to 8, the limiting structure 220 includes a first limiting plane 611 provided on the outer wall of the mating portion 610 and a first limiting plane 611 provided in the first matching groove 510 that can be attached to the first limiting plane 611 The second limit plane 511. Since the first spherical arc surface 517 and the outer wall surface of the mating portion 610 are both spherical arc surfaces, they can rotate without friction or resistance when they are directly matched, and the first limit plane 611 and the second limit plane 511 are set between For plane fit, when the first hinge 500 and the mating part 610 rotate with each other, the first limit plane 611 and the second limit plane 511 cannot rotate due to the friction force between the two planes, thereby achieving limit in the circumferential direction. Bit. At the same time, the two planes are stuck together in the axial direction and do not hinder the upward or downward movement of the first hinge 500.

Specifically, the first limiting plane 611 can be regarded as a plane formed by longitudinal cutting along the outer wall surface of the mating 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 provided in the first matching groove 510, and the second limiting plane 511 is provided on the inner side of the positioning block 512 facing the first Fit the center of the 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.

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 mating portion 610; there are three second limiting planes 511, and there are three second limiting planes 511. It is evenly arranged in the first matching groove 510. The three sets of planes are attached together, which can well limit the position between the first hinge 500 and the second hinge 600. Moreover, since the top surface of the cube-shaped positioning block 512 is also flat, the three positioning blocks 512 form a triangular arrangement, and the top surfaces of the three positioning blocks 512 form a stable supporting surface for more reliable support. Hinge cover 700. Of course, the number of the first limiting plane 611 and the second limiting plane 511 can also be one, two, or four, or more.

In this embodiment, the top of the second hinge 600 is a mating portion 610, and the bottom has a connecting portion 630, and the connecting portion 630 is specifically a cylindrical structure. The diameter of the cylinder is slightly larger than the diameter of the bottom of the fitting 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 diameter of the bottom of the mating part 610, so that on the one hand, the compactness of the parts of the second hinge 600 is maintained, On the other hand, it also facilitates the connection between the connecting portion 630 and the cutting unit 400 and the body 100 to be stable.

10 to 12, the cutting unit 400 further includes a cover plate 420 provided on the housing 410, a bracket 430 provided on the cover plate 420, and at least one bit assembly 440 provided on the bracket 430 (the bit in this embodiment There are three components 440), and a transmission structure (not shown in the figure) provided in the space enclosed by the housing 410 and the cover 420 for driving the cutter head component 440.

4 again, the edge of the first matching groove 510 of the first hinge 500 extends outward to form an annular flange 514. During installation, the annular flange 514 overlaps the edge of the mounting hole 411, and the edge of the mounting hole 411 is provided There is at least one stopper 412, a first avoidance groove 515 is provided on the annular flange 514 corresponding to the stopper 412, the hinge cover 700 is disposed in the first matching groove 510, and the edge of the hinge cover 700 protrudes outward At least one blocking block 720 that can be clamped at the stop 412 is extended. In this way, the hinge cover 700 is fixed to the housing 410 by the clamping block 720 and the stop 412. At the same time, since the hinge cover 700 is disposed on the first hinge 500, the first hinge 500 is limited to Between the housing 410 and the hinge cover 700, the first hinge 500, the housing 410 and the hinge cover 700 are connected as a whole. When the cutting unit 400 is shaving and pressing the skin, the housing 410 and the hinge cover 700 are pressed down and moved down. At this time, the first hinge 500 moves downward under the pressure of the hinge cover 700, so that the first limit plane 611 and the second The limiting plane 511 is separated in the axial direction. When the external pressing force disappears, the elasticity of the first hinge 500 returns to the original position, and the first limiting plane 611 and the second limiting plane 511 are attached again.

When the first hinge 500 is installed, for quick positioning, the edge of the mounting hole 411 is also provided with at least one positioning post 413, and the annular flange 514 is provided with at least one positioning post 413 for snapping in when the annular flange 514 rotates. The semicircular positioning hole 516. The positioning post 413 and the semi-circular positioning hole 516 not only play a positioning role, but also play a supporting and positioning role for the transmission structure in the housing 410.

Further, referring to FIG. 13, 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 slot 414 that can be inserted into the locking block 720 when it rotates horizontally. One side of the card slot 414 is provided with a limit block 415. When the card block 720 rotates at a certain angle in the card slot 414, it stops at the limit block 415 and does not continue to rotate. At this time, the hinge cover 700 is installed in place. To facilitate the rotation of the hinge cover 700, a second avoiding slot 730 of the avoiding block 412 is also provided on the edge of the hinge cover 700, and the clamping block 720 is arranged at the second avoiding slot 730. In this way, when installing, first cover the hinge cover 700 on the first hinge 500, specifically, place the hinge cover 700 on the top surface of the three positioning blocks 512, and place the second avoidance slot 730 corresponding to At the clamping block 720, the hinge cover 700 is rotated to make the clamping block 720 rotate into the slot 414 until it stops at the stop block 415 to complete the installation of the hinge cover 700. At this time, the locking slot 414 limits the locking block 720 in the direction of the central axis L, and the limiting block 415 and the second avoiding slot 730 limit the rotation angle of the locking block 720 in the circumferential direction.

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, and there are also three positioning posts 413. The three positioning posts 413 are alternately spaced from the three stoppers 412. Evenly distributed on the edge of the mounting hole 411. That is, a stopper 412 is provided between the two positioning posts 413, and a positioning post 413 is provided between the two stoppers 412. Such alternately arranged structure makes the fixing of the first hinge 500 more stable and reliable.

In this embodiment, the hinge cover 700 is detachably fixed by screwing and snapping in as described above. In other embodiments, the hinge cover 700 can also be fixed by screws, glue bonding, or ultrasonic welding.

Embodiment two :

3, the cutter head floating structure 200 provided in the second embodiment of the present application is substantially the same as the cutter head floating structure 200 in the first embodiment. The difference is that, please refer to FIGS. 3 and 12 again. In this embodiment, the cutter head The floating structure 200 includes a housing 410 and a flexible support 210. The housing 410 has a mounting hole 411, the first hinge 500 is placed at the mounting hole 411, and the flexible bracket 210 is wrapped around the second hinge 600. Specifically, the first hinge 500 is pressed on the top edge of the flexible bracket 210, the top of the flexible bracket 210 is placed in the mounting hole 411, and the bottom of the flexible bracket 210 is sleeved on the outer wall of the second hinge 600. That is, the flexible support 210 has a hollow cylindrical structure, and the second hinge 600 is located in the hollow structure of the flexible support 210. Specifically, the top of the flexible bracket 210 also extends outward to form a ring-shaped flange 211, the ring-shaped flange 211 is placed on the edge of the mounting hole 411, and the ring-shaped flange 514 of the first hinge 500 is pressed on the ring-shaped flange 211 , And the outer wall of the second hinge 600 is provided with an annular groove 640, and the bottom of the flexible bracket 210 is sleeved on the annular groove 640 of the second hinge 600, so that the top and bottom of the flexible bracket 210 are fixed.

Moreover, in this embodiment, the limiting structure 220 is different from the first embodiment. Specifically, in this embodiment, the limiting structure 220 includes a limiting convex portion (not shown in the figure) provided on the flexible support 210 and a limiting concave portion provided on the first hinge 500 and matched with the limiting convex portion (Not shown in the figure). Since the flexible bracket 210 is fixed at the mounting hole 411 and cannot be rotated, the first hinge 500 and the flexible bracket 210 are fixed together by the limiting convex portion and the limiting concave portion, so that the first hinge 500 cannot be rotated either. The hinge 500 and the second hinge 600 cannot rotate relative to each other to prevent the cutting unit 400 from rotating and slipping as a whole, but at the same time, the flexible support 210 can move up and down in the axial direction to achieve floating by using the elastic expansion and contraction performance of the flexible support 210. Of course, the limiting structure 210 is not limited to the above-mentioned limiting protrusions and limiting recesses, and may also be other fasteners such as screws that can connect the first hinge 500 and the flexible bracket 210.

When the personal care device is working, when the cutting unit 400 contacts the face and is squeezed by the force of the face, the cutting unit 400 drives the first hinge 500 to move downward, and at the same time applies pressure to the top of the flexible support 210 to make the flexible support 210 happen. During this process, the limiting structure 220 is separated so that the hinge cover 700 and the cutting unit 400 can rotate with the first hinge 500 around the center O of the first spherical arc surface 517, so that the cutting unit 400 can be rotated at 360° Floating within the range. During the rotation, due to the elastic deformation of the flexible support 210, the top end of the flexible support 210 can float up and down, so that the cutting unit 400 floats more smoothly in the 360° range; and when the cutting unit 400 acts on different parts of the face, the face The external force acting on the personal care device changes. When the external force applied to the cutting unit 400 decreases, that is, when the external force is less than the elastic force of the flexible support 210, the flexible support 210 elastically returns to push the first hinge 500 upward, and the cutting unit 400 moves upward. The limit structure 220 is refitted to prevent the first hinge 500 and the second hinge 600 from rotating relative to each other. During this process, the cutting unit 400 floats up and down along the central axis L, which can better adapt to changes in the facial curve and avoid hard contact with the face. So as to bring users a more comfortable shaving experience.

In addition, a flexible support 210 is provided here to shield the exposed part between the housing 410 and the second hinge 600, improve the appearance of the personal care device, and also protect the internal components, as well as the cutting unit 400. To a certain degree of support.

Example three

15 and 16, the cutter head floating structure 200 provided in the second embodiment of the present application is substantially the same as the cutter head floating structure 200 in the first embodiment, except that the shape of the first matching groove 510 and the matching portion 610 are different. Specifically, in this embodiment, the first mating groove 510 has a first flat surface 518, the first flat surface extends horizontally inward along the bottom edge of the first mating groove 510, and the surface of the mating portion 610 has a second flat surface 518 that cooperates with the first flat surface 518.平面612. The second plane 612 is the bottom plane of the mating portion 610. When the mating part 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 part 610 overlaps the first plane 518 in the first mating groove 510. When the limiting structure When 220 is separated, the second plane 612 and the first plane 518 can rotate with each other, so that the relative rotation between the first hinge 500 and the second hinge 600 can also be realized. The cutting unit 400 in the first embodiment can also be rotated at 360 °Floating requirements within the range.

Other structures not listed in this embodiment can be the same as the first embodiment or the second embodiment, and will not be repeated here.

The above descriptions are only preferred embodiments of this application, and are not intended to limit this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A floating structure of cutter head, which is characterized in that it comprises:

Cutting unit

A first hinge connected to the cutting unit, the first hinge has a first matching groove therein, and the bottom of the first matching groove penetrates the first hinge;

The top of the second hinge has a mating part placed in the first mating groove, and the mating part and the first mating groove can be separated in the axial direction under the action of external force, and the bottom of the second hinge Extend through the first hinge in a direction away from the cutting unit;

The limiting structure is used to prevent the first hinge and the second hinge from rotating mutually.
The cutter head floating structure according to claim 1, wherein the first hinge is a plastic part that can be elastically deformed.
The cutter head floating structure according to claim 2, wherein the cutting unit includes a housing and a hinge cover, the housing has a mounting hole, the first hinge is provided at the mounting hole, and the first hinge The top of a hinge is pressed and fixed by the hinge cover plate.
The cutter head floating structure according to claim 3, wherein the first matching groove has a first spherical arc surface, and the surface of the matching portion has a second spherical arc that cooperates with the first spherical arc surface. Or, the first matching groove has a first flat surface, and the surface of the matching portion has a second flat surface matching the first flat surface.
The cutter head floating structure according to claim 4, characterized in that: the limiting structure comprises a first limiting plane provided on the outer surface of the mating portion, and a first limiting plane provided in the first matching groove to interact with the The first limiting plane is attached to the second limiting plane.
The cutter head floating structure according to claim 5, wherein a positioning block is provided in the first matching groove, and the second limiting plane is provided on the inner side of the positioning block and faces the first matching groove. The center of the groove.
The cutter head floating structure according to claim 5, wherein: the first limit planes are multiple, and the plurality of first limit planes are evenly distributed on the outer wall surface of the mating portion; the second There are a plurality of limiting planes, and the plurality of second limiting planes are uniformly arranged in the first matching groove.
The cutter head floating structure according to claim 3, wherein the edge of the mounting hole is provided with at least one stopper, the edge of the first matching groove extends outward to form an annular flange, and the annular convex The rim is placed on the edge of the mounting hole, the ring-shaped flange is provided with a first avoidance groove corresponding to the stop, the hinge cover is covered in the first matching groove, and the hinge At least one locking block which can be locked at the stop is arranged on the edge of the cover plate.
The cutter head floating structure according to claim 8, characterized in that: between the stopper and the edge of the mounting hole is provided a card slot for the card block to be locked in when it rotates horizontally, and the One side is provided with a limiting block for resisting the blocking block, the edge of the hinge cover plate is provided with a second avoiding groove which can avoid the blocking block, and the blocking block is arranged at the second avoiding groove.
The cutter head floating structure according to claim 9, wherein the cutting unit further includes a cover plate provided on the housing, a bracket provided on the cover plate, and at least A cutter head assembly, and a transmission structure arranged in the enclosed space of the housing and the cover for driving the cutter head assembly.
The cutter head floating structure according to claim 1, wherein the cutting unit comprises a housing and a flexible support, the housing has a mounting hole, the first hinge is placed at the mounting hole, and the flexible support Wrapped on the outside of the second hinge.
The cutter head floating structure according to claim 11, wherein the first hinge is pressed on the top edge of the flexible bracket, the top of the flexible bracket is placed in the mounting hole, and the flexible bracket The bottom is sleeved on the outer wall of the second hinge.
The cutter head floating structure according to claim 12, wherein the top of the flexible support extends outward to form an annular convex edge, the annular convex edge is placed on the edge of the mounting hole, and the first hinge The top edge extends outward to form an annular flange, the annular flange is pressed on the annular flange, the outer wall of the second hinge is provided with an annular groove, and the bottom of the flexible bracket is sleeved on the Said on the annular groove of the second hinge.
The cutter head floating structure according to claim 11, wherein the limiting structure comprises a limiting protrusion provided on the flexible support and a limiting protrusion provided on the first hinge and connected to the limiting protrusion Restricting recessed part for matching.
A personal care device, comprising a body, characterized in that: the personal care device further comprises the cutter head floating structure according to any one of claims 1 to 14 arranged on the body.