CN216180723U

CN216180723U - Rotary electric shaver and circular knife assembly with hardness difference

Info

Publication number: CN216180723U
Application number: CN202122536593.1U
Authority: CN
Inventors: 怀华培; 戴立强; 翁云云; 高麟
Original assignee: HAINING XINYI ELECTROMECHANICAL CO Ltd
Current assignee: HAINING XINYI ELECTROMECHANICAL CO Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-04-05
Anticipated expiration: 2031-10-21

Abstract

A circular knife assembly with hardness difference comprises a blade and a knife net, wherein the blade comprises a cutting edge part with a cutting edge, the hardness of the cutting edge part is greater than the surface hardness of the knife net, and the hardness difference is 200HV-500 HV. The utility model has the advantages of small sound during shaving, long endurance time, difficult whisker pulling phenomenon and good shaving effect.

Description

Rotary electric shaver and circular knife assembly with hardness difference

Technical Field

The utility model relates to a rotary electric shaver and a circular knife assembly with poor hardness thereof, belonging to the field of shavers.

Background

For the user, the sound level, shaving effect, and duration of the razor are all factors considered by the user.

The rotary electric shaver is shaved by a circular cutter assembly at the head of the shaver, the circular cutter assembly comprises a cutter mesh and a cutter blade, the hardness of the materials of the cutter mesh and the cutter blade is more than or equal to 400HV, and the sliding friction is generated between the cutting edge of the cutter blade and the working surfaces of the inner ring and the outer ring of the cutter mesh in the process of the cutter blade rotating at high speed by taking the central shaft of the cutter mesh as an axis.

At present, the cutter mesh and the blades of the circular cutter assembly of the rotary electric shaver are made of stainless steel materials and have basically the same hardness, the blades are very easy to produce occlusion friction with the working surface of the cutter mesh in the moving process, the abrasion of the material of the working surface of the cutter mesh is aggravated, the cutting edge of the blades is easy to break or notch, the sharpness is reduced, and finally the quality problems of beard pulling, poor shaving cleanliness, current increase, poor sound, short cruising time and the like occur in the shaving process of the shaver.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the rotary electric shaver and the circular shaver component with the hardness difference, the cutting edge and the shaver net are not easy to generate occlusion friction in the relative sliding process, the cutting edge retentivity of the cutting edge is improved, the service life is prolonged, the current of the shaver is small, the endurance time is long, the whisker pulling phenomenon is not easy to occur, and the shaving effect is good.

A circular knife assembly with hardness difference comprises a blade and a knife net, wherein the blade comprises a cutting edge part with a cutting edge, the hardness of the cutting edge part is greater than the surface hardness of the knife net, and the hardness difference is 200HV-500 HV. In the technical scheme, the hardness of the cutting edge part is designed to be larger than that of the cutter mesh, and the hardness difference is reasonably limited to be 200HV-500HV, so that the cutting edge and the cutter mesh are not easy to generate occlusion friction in the relative sliding process, the cutting edge retentivity of the cutting edge is improved, the service life is prolonged, the current of the shaver is small, the endurance time is long, the whisker pulling phenomenon is not easy to occur, and the shaving effect is good.

Preferably, the blade portion and the knife net are both of metal structures.

Preferably, the edge part is made of an alloy tool steel structure, and the hardness is 800HV-1050 HV; the knife net is of a stainless steel structure, and the hardness is 550HV-600 HV.

Preferably, the number of the blades is multiple, the shaver further comprises a rotating member driven by a rotating shaft of the shaver, the blades are fixedly arranged on the rotating member, all the blades are circumferentially distributed around a rotating central shaft of the rotating member, the cutting edges of all the blades are distributed on an annular region with the rotating central shaft of the rotating member as a central shaft, and the motion paths of all the cutting edges are the same. According to the technical scheme, the blades are fixedly arranged on the rotating piece and are directly driven by the rotating piece, the moving paths of the cutting edges of all the blades are the same, and compared with the traditional mode in which the blades are connected with the rotating piece of the shaver through the transmission structure formed by the joints and the interfaces, the consistency of the moving paths of the cutting edges can be ensured for a long time, and the shaver can be ensured to have the states of small shaving sound, good use feeling and high shaving efficiency for a long time.

Preferably, the rotating member is of a rigid construction. The purpose reduces the deformation of rotating member at rotatory in-process, can further guarantee the uniformity in blade motion route for a long time, lets the razor can guarantee for a long time that the sound of shaving is little, use feels good, the efficient state of shaving, and the stereoplasm structure can be the engineering working of plastics.

Preferably, the rotating member includes a rotating body, and a fixing portion connected to the rotating body for fixing the blade.

Preferably, the fixing part is a connecting arm arranged around the rotating body, or a connecting ring.

Preferably, the rotating body and the fixing portion are integrally connected. The rotating piece formed by the connection is convenient to manufacture.

Preferably, all the cutting edges are extended through the rotation center axis of the rotating member.

The utility model also discloses a rotary electric shaver, which comprises the circular knife assembly in any technical scheme.

In conclusion, the utility model has the following beneficial effects:

1: according to the utility model, the hardness of the cutting edge part is greater than that of the cutter mesh, and the hardness difference is 200HV-500HV, so that the cutting edge and the cutter mesh are not easy to generate occlusion friction in the relative sliding process, the cutting edge retentivity of the cutting edge is improved, the service life is prolonged, the current of the shaver is small, the endurance time is long, the whisker pulling phenomenon is not easy to occur, and the shaving effect is good;

2: according to the utility model, the blades are fixedly arranged on the rotating piece and are directly driven by the rotating piece, and the motion paths of the cutting edges of all the blades are the same, so that the consistency of the motion paths of the cutting edges can be ensured for a long time, and the shaver can be ensured to be in a state of low shaving sound, good use feeling and high shaving efficiency for a long time;

3: according to the utility model, the rotating piece is of a hard structure, so that the deformation of the rotating piece in the rotating process is reduced, the consistency of the motion path of the cutting edge can be further ensured for a long time, and the shaver can be ensured to be in a state of low shaving sound, good use feeling and high shaving efficiency for a long time;

4: according to the utility model, the extension lines of all the cutting edges pass through the rotating central shaft of the rotating piece, and under the condition of determining the lengths of the cutting edges, the effective ring width swept by the cutting edges is maximum, the shearing area of the cutting edges is maximum, and the shaving effect is better.

Drawings

FIG. 1 is a schematic diagram of the construction of a circular knife assembly;

FIG. 2 is a schematic view of one of the connection structures of the blade and the rotary member;

FIG. 3 is a schematic diagram of the structure of the rotary member of FIG. 2;

FIG. 4 is a schematic view of a second attachment of the blade to the rotary member;

FIG. 5 is a schematic diagram of the structure of the rotary member of FIG. 4;

FIG. 6 is a schematic view of a third attachment of the blade to the rotary member;

FIG. 7 is a schematic view of the blade installation;

fig. 8 is a sweep of different cutting edges.

Detailed Description

The utility model will be further explained by means of specific embodiments with reference to the drawings.

Example 1: the circular knife assembly with the hardness difference is shown in fig. 1 and comprises a blade 1 and a knife net 3, wherein the blade 1 comprises a cutting edge part with a cutting edge 11, the blade 1 rotates at a high speed by taking a central shaft of the knife net 3 as an axis, in addition, in the rotating process of the blade 1, the cutting edge 11 generates sliding friction with working surfaces of inner and outer rings of the knife net, namely, the sliding friction with the surface of the knife net 3, the cutting edge part and the knife net 3 are of metal structures, and compared with the prior art, in the embodiment, the hardness of the cutting edge part is greater than the surface hardness of the knife net 3, the hardness difference is 200HV-500HV, so that the occlusion friction is not easily generated between the cutting edge and the knife net 3 in the relative sliding process, the cutting edge retentivity of the cutting edge is improved, the service life is prolonged, the current of a shaver is small, the endurance time is long, the whisker pulling phenomenon is not easy to occur, and the shaving effect is good.

Specifically, the cutting edge part is an alloy tool steel structure, the cutting edge part of the alloy tool steel structure is adopted, the cutting edge 11 has better wear resistance, cutting edge maintenance and longer service life, the service life of the shaver is longer, the alloy tool steel structure can be a high-speed steel structure, the hardness of the high-speed steel structure is 800HV-1050HV, the knife net 3 is a stainless steel structure, and can be a 20Cr13 stainless steel structure or a 30Cr13 stainless steel structure with the hardness of 550HV-600HV, the hardness of the knife net 3 and the cutting edge part are both above 400HV, the basic hardness requirement is met, and small abrasion of the knife net and good sharpness of the blade are ensured. For the blade 1, as shown in fig. 2, the rest parts of the blade 1 except the cutting edge part are made of alloy tool steel structures, as shown in fig. 4 or fig. 6, only the cutting edge part is made of alloy tool steel structures, and the rest parts of the blade 1 are made of stainless steel structures, that is, the rest parts of the blade 1 except the cutting edge part are made of stainless steel structures, and the cutting edge part can be connected to the rest parts of the blade 1 by welding and the like.

In the prior art, the blade is made of stainless steel, the cutting edge angle is usually 50 degrees to 60 degrees, and the sharpness is still deficient, in this embodiment, the cutting edge portion is designed by adopting an alloy tool steel structure, so that the cutting edge portion can be made sharper on the premise of ensuring the strength, specifically, as shown in fig. 7, the cutting edge angle a of the cutting edge portion is 30 degrees to 50 degrees, and compared with the prior art, the cutting edge portion is sharper, and the shaving effect is better.

Preferably, as shown in fig. 2, 4 or 6, the number of the blades 1 is plural, the rotary shaver further comprises a rotary member 2 driven by the shaver spindle, the rotary member 2 can be driven by the shaver spindle through a gear transmission mechanism, the cutting edge 11 of one blade 1 can be one, two, according to the requirement, a plurality of blades 1 are fixedly arranged on the rotating piece 2 and are directly driven by the rotating piece 2, and all the blades 1 are circumferentially distributed around the rotation central axis of the rotating member 2, the cutting edges 11 of all the blades 1 are distributed on an annular area which takes the rotation central axis of the rotating member 2 as the central axis, the motion paths of all the cutting edges 11 are the same, the path keeps consistent, and the structure can guarantee the consistency of the motion path of the cutting edge for a long time, so that the shaver can guarantee the state of low shaving sound, good use feeling and high shaving efficiency for a long time.

Furthermore, the rotating member 2 is a hard structure, so as to reduce the deformation of the rotating member 2 during the rotating process, and further ensure the consistency of the motion path of the cutting edge for a long time, so that the shaver can ensure the state of small shaving sound, good use feeling and high shaving efficiency for a long time, and the hard structure can be an engineering plastic member.

The rotating member 2 includes a rotating body 21 and a fixing portion 22 connected to the rotating body 21 for fixing the blade 1, as shown in fig. 3 or 6, the fixing portion 22 may be a connecting arm disposed around the rotating body 21, as shown in fig. 6, and the fixing portion 22 is a connecting ring. The fixing portion 22 may be joined to the rotating body 21, but of course, the fixing portion 22 may be integrally connected to the rotating body 21, and the rotating member 2 formed integrally with this connecting portion is convenient to manufacture.

As shown in fig. 2 or fig. 4 or fig. 6, all the extension lines of the cutting edges 11 pass through the rotation center axis of the rotary member 2. As is well known, the process of blade rotary shaving, which is actually the process of rotating the cutting edge 11 around the rotation center axis of the rotating member 2, passes the extension line of the cutting edge 11 through the rotation center axis of the rotating member 2, and under the condition that the length of the cutting edge 11 is determined, the effective ring width swept by the cutting edge 11 is the largest, the cutting area of the cutting edge 11 is the largest, and the shaving effect is better, see the following explanation: as shown in fig. 8, the extension line of the cutting edge B passes through the rotation center axis of the rotary member 2, and the extension line of the cutting edge C does not pass through the rotation center axis of the rotary member 2, it can be seen that the effective ring width swept by the cutting edge B is the largest.

Example 2: a rotary shaver comprising the circular knife assembly described in embodiment 1.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.

Claims

1. A circular knife assembly with hardness difference comprises a knife blade (1) and a knife net (3), wherein the knife blade (1) comprises a cutting edge part with a cutting edge (11), and the circular knife assembly is characterized in that the hardness of the cutting edge part is greater than the surface hardness of the knife net (3), and the hardness difference is 200HV-500 HV.

2. The circular knife assembly with hardness difference according to claim 1, characterized in that the cutting edge part and the knife net (3) are both of metal structure.

3. The circular knife assembly with hardness difference according to claim 2, wherein the edge portion is an alloy tool steel structure, and the hardness is 800HV-1050 HV; the knife net (3) is of a stainless steel structure, and the hardness is 550HV-600 HV.

4. The circular knife assembly with hardness difference according to claim 3, wherein the cutting edge angle A of the cutting edge portion is 30-50 °.

5. The circular knife assembly with hardness difference according to claim 2, wherein the number of the blades (1) is multiple, the circular knife assembly further comprises a rotating member (2) driven by a rotating shaft of the shaver, the multiple blades (1) are fixedly arranged on the rotating member (2), all the blades (1) are circumferentially distributed around the rotating central shaft of the rotating member (2), the cutting edges (11) of all the blades (1) are distributed on an annular area taking the rotating central shaft of the rotating member (2) as a central shaft, and the moving paths of all the cutting edges (11) are the same.

6. Round knife assembly with hardness difference according to claim 5, characterized in that the rotating piece (2) is of a hard construction.

7. Round knife assembly with hardness difference according to claim 5, characterized in that the rotating piece (2) comprises a rotating body (21) and a fixing part (22) connected to the rotating body (21) for fixing the blade (1).

8. Round knife assembly with hardness difference according to claim 7, characterized in that the rotating body (21) and the fixed part (22) are connected in one piece.

9. Round knife assembly with hardness difference according to claim 5, characterized in that the extension of all cutting edges (11) passes through the rotation center axis of the rotating member (2).

10. Rotary electric shaver, characterized in that it comprises a circular cutter assembly as claimed in any of claims 1-9.