CN112192620A

CN112192620A - Tool bit subassembly and razor

Info

Publication number: CN112192620A
Application number: CN202011063385.8A
Authority: CN
Inventors: 孟凡迪; 张强
Original assignee: Shenzhen Sushi Technology Co Ltd
Current assignee: Soocare Shenzhen Technology Co Ltd; Shenzhen Sushi Technology Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-01-08

Abstract

The utility model belongs to the technical field of the little household electrical appliances of personal care, especially, relate to a tool bit subassembly and razor, this tool bit subassembly be applicable to the razor and with rotary driving mechanism in the razor cooperates and uses, the tool bit subassembly includes outer sword, blade and blade disc, the blade install in on the blade disc, rotary driving mechanism's drive end with the blade disc is connected, and is used for the drive the blade disc rotates relatively, the outer sword cover is located on the blade, offer the entering palpus hole that is used for supplying hair to pass on the outer sword, the relative both sides face of blade is provided with first cutting part and the second cutting part that is used for cutting hair respectively, be provided with third cutting part on the inner wall in entering palpus hole, third cutting part with first cutting part or the second cutting part sets up relatively. The cutter head component can meet the trimming requirements of long beard and short beard at the same time.

Description

Tool bit subassembly and razor

Technical Field

The application belongs to the technical field of small personal care appliances, and particularly relates to a cutter head assembly and a shaver.

Background

At present, common shavers in the market are divided into reciprocating shavers and rotary shavers, wherein the reciprocating shavers drive blades to reciprocate in the reciprocating shavers, and the blades cut hairs back and forth, so that the reciprocating cutting mode is suitable for people with short, hard and thick hairs; the rotating speed of the motor of the rotary shaver is relatively low, but the cutting speed of the rotary blade is high, so that the rotary shaver has a good cutting effect on long hair, and is suitable for people with long, soft and thin hair; therefore, the existing shaver cannot meet the trimming requirements of both long beard and short beard.

Disclosure of Invention

An object of the application is to provide a tool bit subassembly and razor, aims at solving the technical problem that the razor among the prior art can't compromise the pruning requirement of long palpus and short palpus simultaneously.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the utility model provides a tool bit subassembly, be applicable to the razor, and with the cooperation of the rotary driving mechanism in the razor is used, the tool bit subassembly includes outer sword, blade and blade disc, the blade install in on the blade disc, rotary driving mechanism's drive end with the blade disc is connected, and is used for the drive the blade disc rotates relatively, outer blade cover is located on the blade, offer the palpus hole of advancing that is used for supplying hair to pass on the outer sword, the relative both sides face of blade is provided with first cutting edge portion and the second cutting edge portion that is used for cutting hair respectively, be provided with third cutting edge portion on advancing the inner wall in palpus hole, third cutting edge portion with first cutting edge portion or second cutting edge portion sets up relatively.

Optionally, the first blade portion is far away from the edge attenuate of blade side forms first sword limit, the second blade portion is far away from the edge attenuate of blade another side forms the second sword limit, the surface that the third blade portion is close to the blade flushes with the inner wall of outer sword, the third blade portion is close to the edge attenuate of the axis direction of entering palpus hole forms the third sword limit, the third sword limit is located the third blade portion is close to on the surface of blade when the blade is rotatory, first sword limit with the second sword limit laminating in on the inner wall of outer sword.

Optionally, the side surface of the blade is provided with a first inclined surface, the first inclined surface extends upwards from the side surface of the blade towards the outside of the blade in an inclined manner until the first inclined surface intersects with the top surface of the blade, and an intersection line between the first inclined surface and the top surface of the blade forms the first blade edge.

Optionally, an included angle between the first inclined surface and the top surface of the blade ranges from 30 ° to 60 °.

Optionally, the other side surface of the blade is provided with a second inclined surface, the second inclined surface extends upwards from the side surface of the blade towards the outside of the blade in an inclined manner until the second inclined surface intersects with the top surface of the blade, and an intersection line between the second inclined surface and the top surface of the blade forms the second edge.

Optionally, the inner wall of the hair inlet hole is provided with a third inclined surface, the third inclined surface extends downwards from the inner wall of the hair inlet hole towards the axis of the hair inlet hole in an inclined manner until being connected with the inner wall of the outer cutter, and an intersection line between the third inclined surface and the inner wall of the outer cutter forms the third edge.

Optionally, a fourth blade portion is disposed on an inner wall of the whisker feeding hole opposite to the third blade portion.

Optionally, the number of the blades is multiple, and each blade is arranged along the circumferential direction of the cutter head, and is radially arranged with the axis of the cutter head as the center.

Optionally, the rotary driving mechanism comprises a linear driving part, a rack and a gear, the gear is connected with the cutter head, the linear driving part is connected with the rack and used for driving the rack to move back and forth along the length direction of the rack, and the rack is meshed with the gear.

One or more of the above technical solutions in the cutter head assembly provided by the present application have at least one of the following technical effects: when the hair shaver is used, after hair penetrates through the hair inlet hole in the outer cutter, the rotary driving mechanism drives the cutter disc and the cutter blade arranged on the cutter disc to rotate back and forth, so that the first cutter edge part and the second cutter edge part cut the hair back and forth, in addition, the third cutter edge part is arranged on the inner wall of the hair inlet hole, so that when the hair is cut, the third cutter edge part and the first cutter edge part or the second cutter edge part are staggered relatively, so that the hair is cut off, in the process, the hair is cut off from two opposite directions by the first cutter edge part and the third cutter edge part simultaneously, the cutter head component has higher cutting force, the hair is cut off more easily, meanwhile, the reciprocating cutting of the cutter blade is realized, the hair cutting is also realized in a reciprocating manner, so that the requirements of short, hard and thick hair can be met, in addition, the cutter blade drives the cutter blade to rotationally shave through the rotary driving mechanism, namely, the rotary, Soft and fine hair shaving requirements; the shaver can meet the trimming requirements of long beard and short beard at the same time.

Another technical scheme adopted by the application is as follows: a shaver comprises a shaver body and the shaver head assembly, wherein a rotary driving mechanism is arranged in the shaver body, and the driving end of the rotary driving mechanism is connected with a cutter disc.

The razor adopts the blade assembly, so that when the hair is cut, the first blade part and the second blade part cut the hair back and forth, in addition, the inner wall of the beard inlet is provided with the third blade part, so that when the hair is cut, the third blade part and the first blade part or the second blade part are staggered relatively, the hair is cut off, in the process, the hair is cut off from two opposite directions by the first blade part and the third blade part simultaneously, the cutting force of the blade head assembly is higher, the hair is cut off more easily, meanwhile, the reciprocating cutting of the blade is realized, the hair is cut back and forth, and the shaving requirements of short, hard and thick hair can be met; the shaver can meet the trimming requirements of long beard and short beard at the same time.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic view of a cutting-head assembly according to an embodiment of the present disclosure.

FIG. 2 is a schematic view of another perspective of the cutter head assembly shown in FIG. 1.

Fig. 3 is a sectional view taken along line a-a in fig. 2.

Fig. 4 is a partially enlarged view of fig. 3 at B.

Fig. 5 is an exploded view of the cutter head assembly shown in fig. 1.

Fig. 6 is a schematic structural diagram of a shaver according to another embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

10-body 20-shaving support 30-cutter head assembly

31-outer knife 32-blade 33-cutter head

311-beard inlet hole 321-first blade 322-second blade

3111-third blade portion 3112-fourth blade portion 3211-first inclined surface

3212 first edge 3221, second inclined surface 3222, and second edge

31111 third inclined surface 31112 third edge.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-6 are exemplary and intended to be used to illustrate the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 1 to 5, in an embodiment of the present application, a cutter head assembly 30 is provided, which is suitable for a shaver and is used in cooperation with a rotation driving mechanism in the shaver, the cutter head assembly 30 includes an outer cutter 31, a cutter 32 and a cutter 33, the cutter 32 is mounted on the cutter 33, a driving end of the rotation driving mechanism is connected to the cutter 33 and is used for driving the cutter 33 to rotate relatively, the outer cutter 31 covers the cutter 32, a hair feeding hole 311 for hair to pass through is formed in the outer cutter 31, a first cutter portion 321 and a second cutter portion 322 for cutting hair are respectively disposed on two opposite side surfaces of the cutter 32, a third cutter portion 3111 is disposed on an inner wall of the hair feeding hole 311, and the third cutter portion 3111 is disposed opposite to the first cutter portion 321 or the second cutter portion 322.

Specifically, in the cutter head assembly 30 according to the embodiment of the present invention, when hair penetrates through the hair inlet hole 311 of the outer cutter 31, the rotary driving mechanism drives the cutter head 33 and the cutter blade 32 mounted on the cutter head 33 to rotate back and forth, so that the first blade portion 321 and the second blade portion 322 cut the hair back and forth, and the third blade portion 3111 is disposed on the inner wall of the hair inlet hole 311, so that the third blade portion 3111 is offset from the first blade portion 321 or the second blade portion 322 to cut the hair, and in this process, the hair is cut by the first blade portion 321 and the third blade portion 3111 from two opposite directions at the same time, the cutter head assembly 30 has a larger cutting force to cut the hair more easily, and the reciprocating cutting of the cutter blade 32 also achieves reciprocating cutting of the hair, so that the shaving requirements of short, hard and thick hair can be satisfied, and in addition, the blade 32 drives the blade 32 to shave rotationally through the rotary driving mechanism, namely belongs to a rotary shaver, thereby meeting the shaving requirements of long, soft and thin hair; the shaver can meet the trimming requirements of long beard and short beard at the same time.

In this embodiment, the hair may be beard, sweat hair, axillary hair, or the like.

In another embodiment of the present application, referring to fig. 2, 3 and 4, the first blade portion 321 of the cutter head assembly 30 is thinned to form a first edge 3212 at the edge away from the side of the blade 32, the second blade portion 322 is thinned to form a second edge 3222 at the edge away from the side of the blade 32, the surface of the third blade portion 3111 close to the blade 32 is flush with the inner wall of the outer blade 31, the edge of the third blade portion 3111 close to the axial direction of the hair-entering hole 311 is thinned to form a third edge 31112, the third edge 31112 is located at the surface of the third blade portion 3111 close to the blade 32, and the first edge 3212 and the second edge 3222 are attached to the inner wall of the outer blade 31 when the blade 32 rotates.

Specifically, during the rotation of the blade, the first and

second edges

3212 and 3222 are attached to the inner wall of the outer knife 31, so that when the first and

second edges

3212 and 3222 rotate through the hair inlet hole 311, the first and

second edges

3212 and 3222 are staggered with respect to the third edge 31112, so that the hair is cut at the same position and on two opposite sides, the cutting force is greater, and the hair is cut more cleanly.

In another embodiment of the present application, referring to fig. 2, 3 and 4, the side surface of the blade 32 of the cutting head assembly 30 is provided with a first inclined surface 3211, the first inclined surface 3211 extends obliquely upward from the side surface of the blade 32 toward the outside of the blade 32 until intersecting the top surface of the blade 32, and an intersection between the first inclined surface 3211 and the top surface of the blade 32 forms a first edge 3212. Specifically, the hair is cut off through the intersection line between the first inclined surface 3211 and the top surface of the blade 32, which is simple in structure and convenient to manufacture. In a specific application, the blade 32 and the first blade portion 321 are integrally formed, wherein the first inclined surface 3211 may extend from a middle portion of a side surface of the blade 32 to the outside of the blade 32 in an inclined manner, and the first inclined surface 3211 may also extend from a connection portion between the side surface of the blade 32 and a bottom surface of the blade 32 to the outside of the blade 32 in an inclined manner, so that the side surface of the blade 32 is completely covered by the first blade portion 321. The specific structure can be set according to the actual design requirement.

In another embodiment of the present application, the first inclined surface 3211 of the cutter head assembly 30 is provided at an angle ranging from 30 ° to 60 ° with the top surface of the blade 32. Specifically, the angle α between the first inclined surface 3211 and the top surface of the blade 32₁Can be 30 °, 35 °, 40 °, 45 °, 50 °, 55 ° or 60 °, and the first inclined surface 3211 forms an angle α with the top surface of the blade 32₁Within the above range, the first blade edge 3212 may be prevented from being blunt due to an excessively large angle, which may result in failure to cut hair, or the first blade edge 321 may be prevented from being weak due to an excessively small angle, which may result in easy damage.

Preferably, the angle α between the first inclined surface 3211 and the top surface of the blade 32₁Is 45 degrees.

In another embodiment of the present application, referring to fig. 2, 3 and 4, the other side surface of the blade 32 of the cutter head assembly 30 is provided with a second inclined surface 3221, the second inclined surface 3221 extends obliquely upward from the side surface of the blade 32 toward the outside of the blade 32 until intersecting the top surface of the blade 32, and an intersection line between the second inclined surface 3221 and the top surface of the blade 32 forms a second edge 3222. Specifically, the hair is cut off through the intersection line between the second inclined surface 3221 and the top surface of the blade 32, which is simple in structure and convenient to manufacture. In a specific application, the blade 32 and the second blade portion 322 are integrally formed, wherein the second inclined surface 3221 may extend from the middle of the side surface of the blade 32 to the outside of the blade 32 in an inclined manner, and the second inclined surface 3221 may also extend from the connection between the side surface of the blade 32 and the bottom surface of the blade 32 to the outside of the blade 32 in an inclined manner, so that the second blade portion 322 completely covers the side surface of the blade 32, and during a specific processing, only the side surface of the blade 32 needs to be processed into the second inclined surface 3221, which is simpler to manufacture. The specific structure can be set according to the actual design requirement.

In another embodiment of the present application, the second inclined surface 3221 of the cutter head assembly 30 is provided at an angle ranging from 30 ° to 60 ° with respect to the top surface of the blade 32. Specifically, the angle α between the second inclined surface 3221 and the top surface of the blade 32₂Can be 30 °, 35 °, 40 °, 45 °, 50 °, 55 ° or 60 °, and the angle α between the second inclined surface 3221 and the top surface of the blade 32 is₂Within the above range, the second blade edge 3222 may be prevented from being blunt due to an excessively large angle, which may result in failure to cut hair, or the second blade portion 322 may be prevented from being weak due to an excessively small angle, which may result in easy damage.

Preferably, the angle α between the second inclined surface 3221 and the top surface of the blade 32₂Is 45 degrees.

In another embodiment of the present application, there is provided a cutter head assembly 30 having a third inclined surface 31111 formed on an inner wall of the hair inlet hole 311, the third inclined surface 31111 extends obliquely downward from the inner wall of the hair inlet hole 311 toward an axis of the hair inlet hole 311 until it is connected to an inner wall of the outer cutter 31, and an intersection between the third inclined surface 31111 and the inner wall of the outer cutter 31 forms a third edge 31112. Specifically, the hair is cut by the intersection between the third inclined surface 31111 and the inner wall of the outer blade 31; in a specific application, the outer blade 31 is integrally formed with the third blade portion 3111, wherein the third inclined surface 31111 may extend from the middle of the inner wall of the beard inlet 311 toward the outside of the blade 32; the third inclined surface 31111 may extend from the junction between the inner wall of the beard inlet hole 311 and the outer surface of the outer blade 31 to the outside of the blade 32, so that the third blade portion 3111 completely covers the inner wall of the beard inlet hole 311, and the inner wall of the beard inlet hole 311 is simply processed into the third inclined surface 31111 during the specific processing, which is simpler to manufacture.

In another embodiment of the present application, the angle between the third inclined surface 31111 of the cutter head assembly 30 and the inner wall of the outer cutter 31 is provided in a range of 30 ° to 60 °. Specifically, the angle α between the third inclined surface 31111 and the inner wall of the outer blade 31₃Can be 30 °, 35 °, 40 °, 45 °, 50 °, 55 ° or 60 °, and the angle α between the third inclined surface 31111 and the inner wall of the outer blade 31 is₃In the above range, it is possible to avoid the third blade edge 31112 from being blunt due to an excessively large angle and being unable to cut hair, and it is also possible to avoid the third blade edge 3111 from being weak in strength and being easily damaged due to an excessively small angle.

Preferably, the angle α between the third inclined surface 31111 and the inner wall of the outer blade 31₃Is 45 degrees.

In another embodiment of the present application, referring to fig. 5, the cutter head assembly 30 is provided in a plurality of blades 32, and each blade 32 is disposed along a circumferential direction of the cutter head 33 and radially centered on an axis of the cutter head 33. Specifically, the blades 32 extend in the radial direction of the cutter disc 33 and are radially arranged by taking the axis of the cutter disc 33 as the center, so that after one rotation of the blades 32, one circle of trimming can be performed, the trimming area is large, and the trimming efficiency is high. In the specific application, the blade 32 is perpendicular to the cutter disc 33, the blade 32 and the cutter disc 33 are manufactured in an injection molding and integral forming mode, the manufacturing method is simple, the reliability of connection between the blade 32 and the cutter disc 33 is good, hairs cut by the blade 32 are clean and fall off, and the shaving effect is good. Further, the number of the blades 32 is three, four or more, and the specific number thereof can be set according to the use requirement, which is not limited herein.

In another embodiment of the present application, and as illustrated with reference to FIGS. 1 and 2, the hair-entry aperture 311 of the cutting-head assembly 30 is provided as a circular or polygonal aperture. Specifically, the beard inlet hole 311 is a circular hole, which is convenient to manufacture and facilitates the manufacture of the outer cutter 31, and in addition, the beard inlet hole 311 may also be a triangular hole, a quadrilateral hole, a pentagonal hole, or a polygonal hole with more than five sides.

In another embodiment of the present application, a fourth blade portion 3112 is provided on an inner wall of the beard inlet 311 of the cutter head assembly 30 facing the rotation direction of the blade 32. Specifically, when the rotating mechanism drives the blade 32 to rotate away from the first blade portion 321 to cut hair, the second blade portion 322 and the fourth blade portion cut the hair simultaneously, so that the hair is cut more easily, the shaving effect is better, and the hair is cleaner. In a specific use, the third blade portion 3111 and the fourth blade portion 3112 have the same structure and are symmetrically disposed, and both ends of the third blade portion 3111 are in contact with both ends of the fourth blade portion 3112, thereby spreading the entire inner circumferential wall of the whisker feeding hole 311.

In another embodiment of the present application, the rotary driving mechanism of the cutter head assembly 30 is provided to include a linear driving member (not shown), a rack (not shown) and a gear (not shown), the gear is connected to the cutter head 33, the linear driving member is connected to the rack and is used for driving the rack to move back and forth along the length direction of the rack, and the rack is engaged with the gear. Specifically, the linear driving member drives the rack to move back and forth, and the rack moves back and forth to drive the gear to rotate forward and backward, so as to realize the back and forth rotation of the blade 32, wherein the linear driving member can be a cylinder, a linear module or other components capable of driving the rack to move back and forth.

In this embodiment, the linear driving member, the rack and the gear are all disposed in the body 10 of the shaver, the gear may be directly coaxially connected to the cutter disc 33, and the gear directly drives the cutter disc 33 to rotate forward and backward, or the gear may also be connected to the cutter disc 33 through the first transmission assembly, and the rotating knife of the gear is transmitted to the cutter disc 33 through the first transmission assembly, so as to realize forward and backward rotation of the blade 32; the first transmission assembly can be a gear transmission assembly or a belt transmission assembly, wherein if the number of the cutter head assemblies 30 is multiple, the gears can also be connected with the cutter heads 33 in the cutter head assemblies 30 through the transmission assembly, so that the simultaneous working of the cutter head assemblies 30 is realized, and the working efficiency is improved.

In another embodiment, the rotary driving mechanism comprises a servo motor and a third transmission assembly, an output shaft of the servo motor is connected with the cutter disc 33 through the third transmission assembly, and the rotary power is transmitted to the blade 32 to transmit the rotary power to the blade 32, wherein the output shaft of the servo motor can rotate in the forward direction or the reverse direction, so as to drive the blade 32 to rotate in the forward direction and the reverse direction; the third transmission assembly may be a gear transmission assembly or a belt transmission assembly.

When the reciprocating type shaver is applied specifically, the rotary driving mechanism drives the blade 32 to rotate back and forth, reciprocating type shaving can be achieved, the reciprocating type shaving cannot adopt an expensive motor of the existing reciprocating type shaver, so that the reciprocating type shaver with low cost can be obtained, namely, when the output shaft of the servo motor is controlled to rotate towards one direction, a rotary type shaver can be obtained, namely, the rotary type shaving can be achieved, and the reciprocating type shaving can also be achieved.

In another embodiment of the present application, referring to fig. 6, there is provided a shaver comprising a body 10 and the above-mentioned cutter head assembly 30, wherein a rotary driving mechanism is provided in the body 10, and a driving end of the rotary driving mechanism is connected to a cutter head 33.

Specifically, in the shaver of the embodiment of the present application, since the above-mentioned cutter head assembly 30 is used, when cutting hair, the first blade portion 321 and the second blade portion 322 cut hair back and forth, and in addition, the third blade portion 3111 is disposed on the inner wall of the hair inlet hole 311, so that when cutting hair, the third blade portion 3111 is relatively staggered with respect to the first blade portion 321 or the second blade portion 322, thereby cutting hair, during this process, hair is cut off by the first blade portion 321 and the third blade portion 3111 from two opposite directions at the same time, the cutter head assembly 30 has a larger cutting force, thereby cutting hair more easily, and meanwhile, the reciprocating cutting of the blade 32 is realized, thereby cutting hair back and forth, thereby the shaving requirements of short, hard and thick hair can be satisfied, and in addition, the blade 32 drives the blade 32 to rotate by the rotation driving mechanism, namely, thereby belonging to the rotary shaver, thereby satisfying the requirements of long length, and thick hair, Soft and fine hair shaving requirements; the shaver can meet the trimming requirements of long beard and short beard at the same time. Referring to fig. 30, the number of the cutter head assemblies 30 may be three, three cutter head assemblies 30 are fixed on the body 10 through the shaving support 20, the three cutter head assemblies 30 are arranged in a triangular shape, and the plurality of cutter head assemblies 30 work simultaneously, so that the shaving efficiency is high, hairs can be shaved off, and the shaving effect is good.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A cutter head assembly adapted for use with a shaver and for use with a rotary drive mechanism in the shaver, wherein: the tool bit subassembly includes outer sword, blade and blade disc, the blade install in on the blade disc, rotary driving mechanism's drive end with the blade disc is connected, and is used for the drive the blade disc rotates relatively, outer sword cover is located on the blade, offer the must hole of advancing that is used for supplying hair to pass on the outer sword, the relative both sides face of blade is provided with first cutting edge portion and the second cutting edge portion that is used for cutting hair respectively, be provided with third cutting edge portion on advancing the inner wall in palpus hole, third cutting edge portion with first cutting edge portion or the second cutting edge portion sets up relatively.

2. The cutter head assembly of claim 1 wherein: the utility model discloses a structure of cutting edge, including blade, first cutting edge portion, second cutting edge portion, blade, outer sword, third cutting edge portion, first cutting edge portion is kept away from the marginal attenuate of blade side forms first cutting edge, the second cutting edge portion is kept away from the marginal attenuate of blade another side forms the second cutting edge, the third cutting edge portion is close to the surface of blade with the inner wall of outer sword flushes, the third cutting edge portion is close to the marginal attenuate of the axis direction of advancing the palpus hole forms the third cutting edge, the third cutting edge is located the third cutting edge portion is close to the surface of blade when the blade is rotatory, first cutting edge with the second cutting edge laminating in on the inner wall of outer sword.

3. The cutter head assembly of claim 2 wherein: the side surface of the blade is provided with a first inclined surface, the first inclined surface extends upwards from the side surface of the blade towards the outside of the blade in an inclined mode until the first inclined surface is intersected with the top surface of the blade, and the intersection line between the first inclined surface and the top surface of the blade forms a first blade edge.

4. The cutter head assembly of claim 3 wherein: the included angle between the first inclined plane and the top surface of the blade ranges from 30 degrees to 60 degrees.

5. The cutter head assembly of claim 2 wherein: the other side of blade is equipped with the second inclined plane, the second inclined plane from the side of blade towards the blade outer slope upwards extends, until with the top surface of blade is crossing, the second inclined plane with the intersection line between the top surface of blade forms the second sword limit.

6. The cutter head assembly of claim 2 wherein: the inner wall of the beard inlet hole is provided with a third inclined surface, the third inclined surface extends downwards from the inner wall of the beard inlet hole towards the axis of the beard inlet hole in an inclined mode until the third inclined surface is connected with the inner wall of the outer cutter, and a third edge is formed by the intersection line of the third inclined surface and the inner wall of the outer cutter.

7. The cutter head assembly of any one of claims 1 to 6 wherein: and a fourth blade part is arranged on the inner wall of the whisker feeding hole opposite to the third blade part.

8. The cutter head assembly of any one of claims 1 to 6 wherein: the cutter comprises a cutter head, a plurality of blades and a cutter head, wherein the number of the blades is multiple, and each blade is arranged along the circumferential direction of the cutter head and radially arranged by taking the axis of the cutter head as the center.

9. The cutter head assembly of any one of claims 1 to 6 wherein: the rotary driving mechanism comprises a linear driving piece, a rack and a gear, the gear is connected with the cutter head, the linear driving piece is connected with the rack and used for driving the rack to move back and forth along the length direction of the rack, and the rack is meshed with the gear.

10. A shaving razor characterized by: the cutter head assembly comprises a machine body and the cutter head assembly as claimed in any one of claims 1 to 9, wherein a rotary driving mechanism is arranged in the machine body, and a driving end of the rotary driving mechanism is connected with the cutter head.