CN219543258U - Cutter head assembly and hair trimmer - Google Patents

Abstract

The embodiment of the utility model discloses a cutter head assembly and a hair trimmer, wherein the cutter head assembly comprises a movable cutter, a static cutter bracket, a movable cutter bracket and a supporting spring piece; the movable knife can reciprocate along a preset direction; the static knife support is positioned below the movable knife and provided with a travel hole extending along a preset direction; the movable cutter bracket comprises a connecting arm extending along a preset direction and two supporting lugs respectively connected to two ends of the connecting arm, wherein the two supporting lugs penetrate through the travel holes and are respectively and fixedly connected to two ends of the movable cutter along the preset direction; the supporting elastic sheet comprises a fixed part and an elastic pushing part which are connected with each other, and the fixed part is fixedly connected with the static cutter bracket and is arranged at intervals with the movable cutter; the elastic pushing part comprises at least two upward convex arc pushing surfaces which are arranged at intervals in a preset direction, and the arc pushing surfaces are bent and extend along the preset direction and elastically abut against the inner wall surface of the movable knife. The tool bit assembly can reduce the friction area of the supporting spring plate and the movable tool and reduce the heating value.

Description

Cutter head assembly and hair trimmer

Technical Field

The utility model relates to the technical field of hair cutting, in particular to a cutter head assembly and a hair trimmer.

Background

As the demand for self-image increases, various hair trimmers, such as shavers, hair trimmers, nose trimmers, etc., have grown. The hair trimmer is provided with a cutter head assembly, the cutter head assembly comprises a movable cutter and a static cutter, the movable cutter is provided with a cutting edge, a cutter hole is formed in the position, corresponding to the cutting edge, of the static cutter, and the movable cutter is driven to move relative to the static cutter through a driving mechanism so as to cut hair. Since the hair trimmer requires very high precision in cutting, it is necessary to bring the moving blade into close contact with the stationary blade at all times to effect cutting of the hair.

In the related art, an elastic supporting piece is arranged and used for elastically jacking the movable knife to be attached to the movable knife. The current elastic support member is generally configured to include a bottom plate, side plates connected to both sides of the bottom plate, and two top plates connected to the tops of both side plates, the top plates integrally extending in a moving direction of the movable blade. The bottom plate is fixedly connected to the static knife support, and the two top plates are respectively abutted against the two sides of the movable knife. Thus, the elastic support piece can push the movable knife to be attached to the movable knife. However, because the whole roof is laminated with moving the sword, and both area of contact are too big, moves the two roof that sword reciprocating motion made elastic support piece and moves the sword high frequency friction, produces a large amount of heat, then can lead to moving sword and quiet sword bending deformation, the condition of card hair appears easily, and the high temperature rise can influence user's use comfort simultaneously. In addition, the high-frequency friction between the movable knife and the two top plates of the elastic support piece can also increase the energy consumption of the driving mechanism, so that the power consumption rate can be improved.

The foregoing is merely provided to facilitate an understanding of the principles of the utility model and is not admitted to be prior art.

Disclosure of Invention

In view of the above, the present utility model provides a cutter head assembly, which aims to solve the technical problem that the friction area between an elastic support piece and a movable cutter of the cutter head assembly of the hair trimmer is too large.

In order to achieve the above purpose, the cutter head assembly provided by the utility model comprises a movable cutter, a static cutter support, a movable cutter support and a supporting spring piece:

the movable cutter can reciprocate along a preset direction and is provided with a shearing blade;

the static knife support is positioned below the movable knife, and is provided with a travel hole extending along the preset direction;

the movable cutter bracket comprises a connecting arm extending along the preset direction and two supporting lugs connected to two ends of the connecting arm respectively, wherein the two supporting lugs are positioned above the travel hole and are fixedly connected to two ends of the movable cutter along the preset direction respectively;

the supporting elastic sheet comprises a fixed part and an elastic pushing part which are connected with each other, and the fixed part is fixedly connected with the static knife bracket and is arranged at intervals with the movable knife; the elastic pushing part comprises at least two upward convex arc pushing surfaces which are arranged at intervals in the preset direction, and the arc pushing surfaces extend in a bending mode along the preset direction and elastically abut against the inner wall surface of the movable knife to avoid the shearing knife edge.

In an embodiment, the elastic pushing portion is disposed between the two supporting lugs, and at least two arc pushing surfaces are respectively distributed on two sides of the plate surface of the connecting arm.

In an embodiment, the plurality of arc pushing surfaces are symmetrically arranged one by one relative to the connecting arm.

In an embodiment, two arc pushing surfaces are arranged on one side of the board of the connecting arm at intervals in the preset direction, and the ratio of the distance between the two arc pushing surfaces on one side of the board of the connecting arm and the length of the movable knife is greater than 0.3 and less than 0.6.

In an embodiment, the supporting lugs and the adjacent movable blade end surfaces are arranged at intervals, and the ratio of the width of the supporting lugs in the preset direction to the length of the movable blade is greater than or equal to 0.06 and less than or equal to 0.09.

In an embodiment, the supporting lug comprises a first lug and a second lug opposite to each other in the transverse direction, the first lug and the second lug are respectively folded and extended outwards from two opposite plate surfaces of the connecting arm, and top surfaces of the first lug and the second lug are fixedly connected to an inner wall surface of the movable knife.

In an embodiment, the fixing part is plate-shaped and is fixedly connected to the middle part of the top surface of the movable knife bracket; the elastic pushing part comprises two arc-shaped elastic sheets which are respectively connected to two sides of the fixing part in the preset direction; the arc spring plate comprises a connecting plate and two arc spring arms extending along the preset direction, and the arc spring arms are downwards bent; one side of the connecting plate is fixedly connected to one end of the fixing part in the preset direction, the other side of the connecting plate is fixedly connected with two arc-shaped spring arms, the two arc-shaped spring arms are respectively arranged on two sides of the plate surface of the connecting arm, and the top wall surface of the arc-shaped spring arm forms the arc-shaped pushing surface.

In an embodiment, one end of the arc spring arm away from the fixing portion is disposed at an interval from the movable knife bracket.

In an embodiment, the top surface of the connecting arm is located below the top surface of the stationary blade bracket, and the fixing portion is fixed on the top surface of the stationary blade bracket located between the two supporting lugs and covers the middle of the travel hole.

In an embodiment, the shearing blade comprises side blades arranged on two sides of the movable blade and a middle blade arranged in the middle of the movable blade, and the side blades and the middle blade are arranged along the preset direction; the arc pushing surface is abutted between the side cutting edge and the middle cutting edge; the supporting lugs are fixedly connected between the two rows of side knife edges.

In an embodiment, the tool bit assembly further includes a stationary blade, the stationary blade includes a top plate and side plates connected to two sides of the top plate, the top plate and the side plates extend along the preset direction, and the side plates are disposed obliquely downward and inward from side edges of the top plate; a plurality of side cutting holes are formed in the joint of the top plate and the side plate at intervals along the preset direction, and the side cutting edge is at least partially arranged corresponding to the side cutting holes; a plurality of middle cutter holes are formed in the middle of the top plate and are arranged at intervals along the preset direction, and the middle cutting edge is at least partially arranged corresponding to the middle cutter holes; the lower edge of the side plate is fixedly connected to the static knife bracket; the arc pushing surface elastically pushes the movable knife so that the movable knife is clung to the top plate.

The utility model also provides a hair trimmer, which comprises a trimmer main body, a driving mechanism and a cutter head assembly, wherein the cutter head assembly comprises a movable cutter, a static cutter support, a movable cutter support and a supporting spring piece:

the movable cutter can reciprocate along a preset direction and is provided with a shearing blade;

the static knife support is positioned below the movable knife, and is provided with a travel hole extending along the preset direction;

the movable cutter bracket comprises a connecting arm extending along the preset direction and two supporting lugs connected to two ends of the connecting arm respectively, wherein the two supporting lugs are positioned above the travel hole and are fixedly connected to two ends of the movable cutter along the preset direction respectively; and

the supporting elastic sheet comprises a fixed part and an elastic pushing part which are connected with each other, and the fixed part is fixedly connected with the static knife bracket and is arranged at intervals with the movable knife; the elastic pushing part comprises at least two upward protruding arc pushing surfaces which are arranged at intervals in the preset direction, the arc pushing surfaces extend in a bending mode along the preset direction, and the arc pushing surfaces elastically abut against the inner wall surface of the movable knife to avoid the shearing blade in the up-down direction;

the static cutter support of the cutter head assembly is arranged on the trimmer main body, the driving mechanism is arranged on the trimmer main body, and the driving end of the driving mechanism is connected with the connecting arm of the cutter head assembly so as to drive the movable cutter of the cutter head assembly to reciprocate along the preset direction.

According to the cutter head assembly, the movable cutter support comprises the connecting arm and the supporting lugs connected to the two ends of the connecting arm, the two supporting lugs are respectively and fixedly connected to the two ends of the movable cutter in the preset direction, the supporting elastic sheet comprises the fixing part and the elastic pushing part, the fixing part is fixedly connected to the static cutter support and is arranged at intervals with the movable cutter, the elastic pushing part comprises at least two upward convex arc pushing surfaces which are arranged at intervals in the preset direction, the arc pushing surfaces are bent and extend in the preset direction, and the arc pushing surfaces elastically abut against the inner wall surface of the movable cutter to avoid the shearing cutter edge. Thus, the two ends of the movable knife in the preset direction are supported by the supporting lugs of the movable knife bracket, and the supporting lugs are fully utilized to enable the two ends of the movable knife in the preset direction to be tightly attached to the static knife.

Meanwhile, the supporting elastic sheet is elastically abutted with the movable cutter only through a plurality of upward convex arc pushing surfaces arranged at intervals in a preset direction, so that the supporting elastic sheet can elastically push the movable cutter upwards through the elastic pushing parts, the movable cutter can be tightly attached to the static cutter all the time, the shearing precision and the shearing effect of the hair trimmer are further ensured, and the situation of hair clamping and the like is avoided. Compared with the mode that the supporting elastic sheet is in contact with the movable cutter on the whole long-strip-shaped top surface, the contact area between the supporting elastic sheet and the movable cutter can be effectively reduced, namely, the friction area between the movable cutter and the supporting elastic sheet during reciprocating motion is reduced, so that the heating value can be reduced, the temperature rise is reduced, bending deformation of the static cutter due to overhigh temperature rise is effectively avoided, and meanwhile, the influence of overhigh temperature rise on the use comfort level of a user is avoided. In addition, the friction area between the movable knife and the supporting spring piece is reduced, so that the energy consumption of the driving mechanism can be reduced, and the power consumption rate of the whole machine is reduced. The arc pushing surface is bent and extended along the preset direction, namely, the arc pushing surface is an arc-shaped cambered surface extending along the preset direction, so that when the movable knife moves back and forth on the supporting elastic sheet, the plurality of arc pushing surfaces can guide the movement of the movable knife, and the movable knife can move more smoothly relative to the supporting elastic sheet.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a schematic structural view of an embodiment of a tool bit assembly of the present utility model;

FIG. 2 is a partially exploded view of the tool bit assembly of FIG. 1;

FIG. 3 is an angled cross-sectional view of the tool bit assembly of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is another angular cross-sectional view of the tool bit assembly of FIG. 1;

FIG. 6 is a schematic structural view of an embodiment of a supporting spring plate according to the present utility model;

FIG. 7 is a schematic view of an exploded view of another embodiment of a tool tip assembly of the present utility model;

fig. 8 is a cross-sectional view of the tool bit assembly of fig. 7 at an angle after assembly.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						100	Tool bit assembly	123	First lug	144	Connecting plate
110	Movable knife	124	Second lug	145	Arc spring arm
						111	Shearing blade	130	Static knife support	150	Static knife
112	Side blade	131	Stroke hole	151	Top plate
						113	Intermediate blade	140	Supporting spring plate	152	Side plate
120	Movable knife support	141	Fixing part	153	Side cutting hole
						121	Connecting arm	142	Elastic pushing part	154	Middle knife hole
122	Support lug	143	Arc pushing surface

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time.

The utility model provides a cutter head assembly for a hair trimmer.

In the embodiment of the present utility model, referring to fig. 1 to 8, the tool bit assembly 100 includes a movable tool 110, a stationary tool holder 130, a movable tool holder 120 and a supporting spring 140. The movable blade 110 is reciprocally movable in a predetermined direction, and the movable blade 110 has a shearing blade 111. The stationary blade support 130 is located below the movable blade 110, and the stationary blade support 130 is provided with a travel hole 131 extending along a preset direction. The movable blade support 120 includes a connecting arm 121 extending along a preset direction and two supporting lugs 122 respectively connected to two ends of the connecting arm 121, wherein the two supporting lugs 122 are located above the travel hole 131 and respectively and fixedly connected to two ends of the movable blade 110 along the preset direction.

The supporting spring plate 140 comprises a fixing part 141 and an elastic pushing part 142 which are connected with each other, and the fixing part 141 is fixedly connected with the static knife bracket 130 and is arranged at intervals with the movable knife 110; the elastic pushing portion 142 includes at least two protruding arc pushing surfaces 143 that are disposed at intervals in a preset direction, where the arc pushing surfaces 143 bend and extend along the preset direction and elastically abut against the inner wall surface of the movable blade 110 to avoid the shearing blade 111.

In the present embodiment, the shearing blade 111 on the movable blade 110 may include a blade tooth formed of a plurality of tooth portions, or may include a blade hole with a blade, and the specific structure and form of the shearing blade 111 on the movable blade 110 are not particularly limited. In order to increase the cutting area, the movable blade 110 may have a strip-shaped structure extending along a predetermined direction, and the movable blade 110 may be a flat blade or an arc blade, which is not particularly limited herein. In order to improve the structural strength, the movable blade support 120 is specifically a sheet metal part, and may be formed by welding one sheet metal or two sheet metals. And the connecting arm 121 is integrally formed with the supporting lug 122. Of course, the movable blade holder 120 may be made of other materials with high structural strength, and is not particularly limited herein. The movable knife bracket 120 is used for fixing and supporting the movable knife 110, and is connected with a driving shaft of a driving device, and the driving device drives the movable knife bracket 120 to drive the movable knife 110 to reciprocate along a preset direction. The movable blade support 120 may be connected to the driving shaft by a plastic member integrally formed with a tombstone at the middle of the connecting arm 121 of the movable blade support 120. The movable blade holder 120 includes a connection arm 121 extending in a predetermined direction and supporting lugs 122 connected to both ends of the connection arm 121, and the supporting lugs 122 may be welded to an inner wall surface, an end surface, or the like of the movable blade 110. The movable knife bracket 120 is fixedly connected with the movable knife 110 through the supporting lug 122, and the supporting lug 122 of the movable knife bracket 120 can support the two ends of the movable knife 110 in the preset direction, so that the two ends of the movable knife 110 can be tightly attached to the static knife 150.

It should be noted that in the embodiment of the present utility model, directional indications (such as up, down, left, right, front, and rear … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture of the tool bit assembly 100 when in use, and if the specific posture is changed, the directional indications are correspondingly changed.

The stationary blade holder 130 is used to support and fix the stationary blade 150, and the structure and formation of the stationary blade holder 130 are numerous and not particularly limited herein. So that the stationary blade holder 130 is located below the movable blade 110, and does not affect the fit between the stationary blade 150 and the movable blade 110 while providing support for the stationary blade 150. Since the movable blade holder 120 needs to be connected to the driving shaft of the driving device, the movable blade holder 120 is disposed under the movable blade 110 and the stationary blade holder 130. The supporting lugs 122 can be connected to two ends of the connecting arm 121 through the connecting segments, so that the connecting arm 121 is entirely located below the travel hole 131, and the moving blade 110 can reciprocate along the preset direction through the guiding movement of the connecting segments in the travel hole 131. Of course. It is also possible that the connection arm 121 is partially embedded in the stroke hole 131, and then the movable blade 110 is reciprocally moved in a preset direction by guiding movement of the connection arm 121 in the stroke hole 131.

The supporting spring 140 may be a sheet metal part, and the supporting spring 140 may be made of other materials with certain structural strength and elasticity. The supporting spring 140 includes a fixing portion 141 and an elastic pushing portion 142, and the fixing portion 141 and the elastic pushing portion 142 may have various forms, for example, the fixing portion 141 may have a plate-like structure, a ring-like structure, a strip-like structure, or the like, which is not limited herein. The fixing portion 141 is used for being fixedly connected to the stationary blade bracket 130, and the fixing portion 141 may be specifically connected to the stationary blade bracket 130 by welding or the like. In order to improve the structural strength, the fixing portion 141 and the elastic pushing portion 142 are integrally formed. The elastic pushing portion 142 may specifically include one or more of an arc spring arm and an arc protrusion, and the specific structure of the elastic pushing portion 142 is not limited herein, and the elastic pushing portion 142 only needs to include at least two arc pushing surfaces 143 that are spaced apart in a preset direction.

It will be appreciated that the arcuate pushing surface 143 is a convex arcuate surface that protrudes upwardly, such that the arcuate pushing surface 143 is in line or near line contact with the moving blade 110. For ease of description, the arcuate pushing surface 143 will be described as being in line contact with the moving blade 110. It should be noted that, the arc pushing surface 143 extends along the preset direction in a bending manner, which means that the arc pushing surface 143 is an arc surface, and the contact line between the arc pushing surface 143 and the moving blade 110 is perpendicular to the preset direction. In other words, the two side surfaces of the arc-shaped pushing surface 143 located on the contact line are sequentially arranged in the preset direction. In this way, when the moving blade 110 reciprocates along the preset direction, the plurality of arc pushing surfaces 143 can provide guiding function for the moving blade 110, so that the sliding of the moving blade 110 relative to the arc pushing surfaces 143 in the preset direction is smoother and more unobstructed. By making the elastic pushing portion 142 include at least two arc pushing surfaces 143 disposed at intervals in the preset direction, the movable blade 110 is not always in contact with a portion between two adjacent arc pushing surfaces 143 in the preset direction during the reciprocating movement of the movable blade 110, so that the contact area between the supporting elastic sheet 140 and the movable blade 110 can be effectively reduced, friction can be further reduced, heat productivity can be reduced, and temperature rise can be reduced compared with a mode that the whole elastic sheet strip top plate 151 is in contact with the movable blade 110. In addition, through the combined action of the two supporting lugs 122 of the movable cutter bracket 120 and at least two arc pushing surfaces 143 which are arranged at intervals along the preset direction, the movable cutter 110 can be always supported in a pushing manner in the reciprocating movement process of the movable cutter 110, so that the movable cutter 110 can be always attached to the static cutter 150 in the movement process, the shearing precision of the hair trimmer is further ensured, and the hair clipping and other conditions are avoided.

According to the cutter head assembly 100, the movable cutter bracket 120 comprises the connecting arm 121 and the supporting lugs 122 connected to the two ends of the connecting arm 121, the two supporting lugs 122 are respectively and fixedly connected to the two ends of the movable cutter 110 along the preset direction, the supporting elastic sheet 140 comprises the fixing part 141 and the elastic pushing part 142, the fixing part 141 is fixedly connected to the static cutter bracket 130 and is arranged at intervals with the movable cutter 110, the elastic pushing part 142 comprises at least two upward convex arc pushing surfaces 143 which are arranged at intervals along the preset direction, and the arc pushing surfaces 143 are bent and extend along the preset direction and elastically abut against the inner wall surface of the movable cutter 110 to avoid the shearing cutter edge 111. In this way, the two ends of the moving blade 110 in the preset direction are supported by the supporting lugs 122 of the moving blade support 120, and the supporting lugs 122 are fully utilized to enable the two ends of the moving blade 110 in the preset direction to be tightly attached to the static blade 150.

Meanwhile, the supporting elastic sheet 140 is elastically abutted with the movable cutter 110 only through a plurality of protruding arc pushing surfaces 143 which are arranged at intervals in a preset direction, so that the movable cutter 110 can be elastically pushed upwards by the supporting elastic sheet 140 through the elastic pushing parts 142, the movable cutter 110 can be tightly attached to the static cutter 150 all the time, the shearing precision and the shearing effect of the hair trimmer are further ensured, and the situation of hair blocking and the like is avoided. Compared with the mode that the supporting elastic sheet 140 is in contact with the movable blade 110 as a whole on the long-strip top surface, the contact area between the supporting elastic sheet 140 and the movable blade 110 can be effectively reduced, namely, the friction area between the movable blade 110 and the supporting elastic sheet 140 during reciprocating motion is reduced, so that the heating value can be reduced, the temperature rise is reduced, the bending deformation of the static blade 150 caused by the too high temperature rise can be effectively avoided, and meanwhile, the influence on the use comfort of a user caused by the too high temperature rise is avoided. In addition, the reduction of the friction area between the movable blade 110 and the supporting spring 140 can also reduce the energy consumption of the driving mechanism and reduce the power consumption rate of the whole machine. By bending and extending the arc-shaped pushing surface 143 along the preset direction, that is, the arc-shaped pushing surface 143 is an arc-shaped surface extending along the preset direction. The two side surfaces of the arc-shaped arc surface are distributed in a preset direction, so that when the movable knife 110 reciprocates on the supporting elastic sheet 140, the plurality of arc-shaped pushing surfaces 143 can guide the movement of the movable knife 110, and the movement of the movable knife 110 relative to the supporting elastic sheet 140 can be smoother.

In an embodiment, as shown in fig. 2 to 7, the elastic pushing portion 142 is disposed between the two supporting lugs 122, and at least two arc pushing surfaces 143 are respectively disposed on two sides of the plate surface of the connecting arm 121.

In this embodiment, it is understood that the movable blade 110 is typically made of martensitic stainless steel, which has a generally high hardness and a small overall deformation. Therefore, the supporting spring plate 140 pushes the movable blade 110 through two arc pushing surfaces 143 arranged at intervals in the preset direction, so that the whole blade and the static blade 150 can be tightly attached. So that the elastic pushing portion 142 is disposed between the two supporting lugs 122, i.e. the plurality of arc-shaped pushing surfaces 143 are disposed between the two supporting lugs 122. It can be appreciated that the two ends of the moving blade 110 are supported and fixed by the supporting lugs 122, and the supporting lugs 122 can push the moving blade 110, so that the two ends of the moving blade 110 are tightly attached to the stationary blade 150 all the time. The elastic pushing portion 142 is located between the two supporting lugs 122, and the plurality of arc pushing surfaces 143 are always pushed to push the blade 110 to be located at the middle of the two supporting lugs 122, and both ends and the middle of the movable blade 110 in the preset direction are effectively supported by the combined action of the supporting lugs 122 and the elastic pushing portion 142, so that the movable blade 110 can be always pushed by the elastic pushing portion 142 in the reciprocating movement process, both ends and the middle of the movable blade 110 can be always pressed against the stationary blade 150, and the cutting effect of the hair trimmer is ensured.

By arranging at least two arc pushing surfaces 143 on two sides of the plate surface of the connecting arm 121, the at least two arc pushing surfaces 143 on one side of the connecting arm 121 are arranged at intervals in a preset direction, and the arc pushing surfaces 143 on two sides of the plate surface of the connecting arm 121 can be symmetrically arranged or asymmetrically arranged, which is not particularly limited herein. Through respectively being provided with two arc pushing surfaces 143 in the face both sides of linking arm 121, then elasticity pushing parts 142 can support top pushing knife 110 in the face both sides of linking arm 121 for moving knife 110 is located the support balance of the face both sides of linking arm 121, can avoid moving knife 110 one side and the inseparable condition of static knife 150 laminating.

Further, the plurality of arc pushing surfaces 143 are symmetrically arranged one by one with respect to the connecting arm 121. In this way, the plurality of arc pushing surfaces 143 located at two sides of the plate surface of the connecting arm 121 symmetrically pushes two sides of the pushing blade 110, so that pushing forces at two sides of the moving blade 110 are more balanced, and the whole moving blade 110 can be guaranteed to be closely attached to the static blade 150. In other embodiments, the arc pushing surfaces 143 on both sides of the connecting arm 121 may be staggered, that is, the plurality of arc pushing surfaces 143 are asymmetrically disposed.

In an embodiment, referring to fig. 2, 3, 7 and 8, two arc pushing surfaces 143 are disposed on one side of the board of the connecting arm 121 and are spaced apart in a predetermined direction, and a ratio of a distance between the two arc pushing surfaces 143 on the one side of the board of the connecting arm 121 and a length of the movable blade 110 is greater than 0.3 and less than 0.6.

In this embodiment, two arc pushing surfaces 143 are disposed on the board side of the connecting arm 121, and the ratio of the distance between the two arc pushing surfaces 143 on the board side of the connecting arm 121 and the length of the movable blade 110 is set to be greater than 0.3 and less than 0.6. Therefore, only two arc pushing surfaces 143 are arranged on two sides of the plate surface of the connecting arm 121, so that effective pushing of the movable knife 110 in the whole-course moving process can be realized, and compared with the case that three or more arc pushing surfaces 143 are arranged on one side of the plate surface of the connecting arm 121, the friction area between the supporting elastic sheet 140 and the movable knife 110 can be effectively reduced, and meanwhile, the manufacturing cost can be reduced.

Specifically, the ratio of the distance between the two arc pushing surfaces 143 on the plate surface side of the connecting arm 121 to the length of the movable blade 110 is 0.3, 0.36, 0.4, 0.45, 0.48, 0.5, 0.55, 0.6. When the ratio of the distance between the two arc pushing surfaces 143 on the board side of the connecting arm 121 to the length of the movable blade 110 is greater than or equal to 0.3, the distance between the two arc pushing surfaces 143 on the board side of the connecting arm 121 is too small, so that when the movable blade 110 reciprocates, the distance between the supporting lug 122 and the adjacent arc pushing surfaces 143 is too large, and therefore, a large area of the movable blade 110 between the supporting lug 122 and the arc pushing surfaces 143 is not effectively supported and pushed, and the movable blade 110 between the supporting lug 122 and the arc pushing surfaces 143 cannot be tightly attached to the static blade 150. When the ratio of the distance between the two arc pushing surfaces 143 on the board side of the connecting arm 121 to the length of the movable blade 110 is greater than 0.6, the distance between the two arc pushing surfaces 143 on the board side of the connecting arm 121 is too large, so that the large area of the movable blade 110 between the two arc pushing surfaces 143 is not effectively pressed, and the movable blade 110 between the two arc pushing surfaces 143 cannot be tightly attached to the static blade 150. Through making the ratio of the interval between two arc pushing surfaces 143 of face side of linking arm 121 and the length of moving sword 110 be greater than 0.3, and be less than 0.6 for moving sword 110 in the reciprocating motion in-process, the distance between support lug 122 and the arc pushing surface 143, and the interval between two adjacent arc pushing surfaces 143 in the default orientation is all comparatively suitable, then support shell fragment 140 can be in moving the whole of sword 110 effectively supporting roof pressure all the time in moving the reciprocating motion in-process of sword 110, then can guarantee to move sword 110 and can both keep closely laminating with quiet sword 150 in reciprocating motion's in-process, and then promote hair trimmer's precision, promote the pruning effect of product.

In an embodiment, as shown in fig. 2 to 4 and 7, the supporting lugs 122 are disposed at intervals from the adjacent end surface of the moving blade 110, and the ratio of the width of the supporting lugs 122 in the preset direction to the length of the moving blade 110 is greater than or equal to 0.06 and less than or equal to 0.09.

In this embodiment, the supporting lugs 122 are disposed at intervals from the adjacent end surfaces of the movable blade 110, i.e. the supporting lugs 122 are fixedly connected to the inner wall surfaces of the movable blade 110 and located at the inner sides of the end surfaces, and compared with the structure in which the supporting lugs 122 are connected to the end surfaces of the movable blade 110, the distance between the two supporting lugs 122 can be reduced while the effective supporting of the movable blade 110 by the supporting lugs 122 is included, so that the length of the movable blade 110, which is located at the middle parts of the two supporting lugs 122, to be supported can be reduced, and the effective supporting of the middle part of the movable blade 110 in the reciprocating movement process can be better ensured.

When the ratio of the width of the supporting lug 122 in the preset direction to the length of the movable blade 110 is smaller than 0.06, the width of the supporting lug 122 is too small, and the connection area between the supporting lug 122 and the movable blade 110 is small, so that the connection strength between the movable blade bracket 120 and the movable blade 110 is low, and the connection requirements of the two cannot be ensured. When the ratio of the width of the supporting lug 122 in the preset direction to the length of the movable blade 110 is greater than 0.09, the width of the supporting lug 122 is too large, so that the connecting strength between the movable blade support 120 and the movable blade 110 can be ensured, but the too wide supporting lug 122 can shield the shearing blade 111 of the movable blade 110 and increase the weight. By making the ratio of the width of the supporting lug 122 in the preset direction to the length of the movable blade 110 be greater than or equal to 0.06 and less than or equal to 0.09, the width of the supporting lug 122 is suitable, the connecting strength between the movable blade bracket 120 and the movable blade 110 is ensured, the excessively wide supporting lug 122 is prevented from shielding the shearing blade 111 of the movable blade 110, and the whole structure is lighter.

In an embodiment, referring to fig. 2 and 7, the supporting lug 122 includes a first lug 123 and a second lug 124 opposite to each other in a lateral direction, the first lug 123 and the second lug 124 respectively extend from two opposite faces of the connecting arm 121 in a turned-over manner, and top faces of the first lug 123 and the second lug 124 are fixedly connected to an inner wall face of the movable blade 110.

In this embodiment, specifically, the movable blade support 120 includes two sheet metal parts extending along a preset direction and welded on a plate surface, the middle parts of the two sheet metal parts form the connecting arm 121, two first lugs 123 are formed at two ends of one sheet metal part, and two second lugs 124 are formed at two ends of the other sheet metal part. In other embodiments, the moving blade holder 120 may include only one sheet metal part. Through making support lug 122 include the first lug 123 and the second lug 124 that are located the linking arm 121 both sides, first lug 123 and second lug 124 fixed connection are in the internal face of moving sword 110, then first lug 123 and second lug 124 can be to moving the position that sword 110 is located the linking arm 121 face both sides and carry out steady support for the tip of moving sword 110 can both closely laminate with quiet sword 150 in the face both sides of linking arm 121, and can guarantee to move the firm connection of sword 110 and moving sword support 120.

In one embodiment, as shown in fig. 2 to 6, the fixing portion 141 is configured in a plate shape, and the fixing portion 141 is fixedly connected to the middle of the top surface of the movable blade bracket 120; the elastic pushing part 142 comprises two arc-shaped elastic sheets which are respectively connected to two sides of the fixing part 141 in a preset direction; the arc spring plate comprises a connecting plate 144 and two arc spring arms 145 extending along a preset direction, and the arc spring arms 145 are downwards bent; one side of the connecting plate 144 is fixedly connected to one end of the fixing portion 141 in a preset direction, the other side of the connecting plate is fixedly connected with two arc-shaped spring arms 145, the two arc-shaped spring arms 145 are respectively arranged on two sides of the plate surface of the connecting arm 121, and the top wall surface of the arc-shaped spring arm 145 forms an arc pushing surface 143.

In this embodiment, the fixing portion 141 may be fixedly connected to the middle portion of the top surface of the movable blade support 120 by welding. So that the fixing portion 141 is fixedly coupled to the middle portion of the top surface of the movable blade holder 120, i.e., the fixing portion 141 is also located between the two supporting lugs 122. The fixing portion 141 is plate-shaped, and the fixing portion 141 may be rectangular. The fixing portion 141 has a plate-shaped structure, the elastic pushing portion 142 includes arc-shaped elastic pieces connected to two sides of the fixing portion 141, and compared with the fixing portion 141 having a ring-shaped structure, the connection between the fixing portion 141 and the stationary blade bracket 130 and the connection between the elastic pushing portion 142 and the fixing portion 141 are more stable, so that the shaking of the elastic pushing portion 142 relative to the fixing portion 141 can be effectively avoided, and the pressing effect of the supporting elastic pieces 140 on the movable blade 110 is affected. In addition, by providing the fixing portion 141 in a plate shape, a plurality of welding positioning notches may be formed on the periphery of the plate-shaped fixing portion 141. Thus, the welding positioning notch is more convenient for visually capturing the welding positioning of the welding system. In order to ensure structural strength, in particular, the arc-shaped elastic sheet and the fixing portion 141 are integrally formed. In practice, the distance between the supporting lug 122 and the fixing portion 141 is greater than the single stroke distance of the movable blade 110, so that the fixing portion 141 does not affect the reciprocating movement of the movable blade 110.

Each arc spring piece comprises a connecting plate 144 and two arc spring arms 145, and the two arc spring arms 145 are arranged at intervals in the width direction (vertical preset direction) of the movable knife 110. The width of the arc spring arm 145 may be selected and designed according to specific needs, and is not particularly limited herein. Specifically, four arc-shaped spring arms 145 are distributed at four corners of the fixed plate. The connection plate 144 may be disposed to be inclined outwardly and upwardly with respect to the fixing portion 141. The arc spring arm 145 is connected to the fixing portion 141 through the connecting plate 144, and compared with the arc spring arm 145 directly connected to the fixing portion 141, the length of the arc spring arm 145 can be shortened, so that the supporting strength of the arc spring arm 145 can be improved, and the arc spring arm 145 is ensured to have enough supporting force. Such that the arcuate arms 145 bend downwardly, i.e., the arcuate arms 145 arch upward, the top wall surface of each arcuate arm 145 forms an arcuate pushing surface 143. By arranging the arc-shaped spring arms 145 at the four corners of the fixing part 141, the top wall surface of the arc-shaped spring arms 145 forms an arc-shaped pushing surface 143, and then the supporting spring plate 140 is provided with four arc-shaped pushing surfaces 143 which are arranged in a matrix, so that the supporting spring plate 140 is only contacted with the inner wall surface of the movable knife 110 through the four convex arc-shaped pushing surfaces 143, the contact area between the movable knife 110 and the supporting spring plate 140 can be minimized while the enough pretightening force is ensured, the friction is further reduced, and the temperature rise is reduced.

Further, referring to fig. 3 to 5, an end of the arc spring arm 145 away from the fixing portion 141 is spaced from the movable blade support 120. Therefore, the end of the arc spring arm far away from the fixing portion 141 is suspended, so that the deformation space of the arc spring arm is larger, and the elastic supporting and pre-compacting effects of the arc spring arm on the movable knife 110 are better. In addition, through making the arc bullet arm unsettled, compare in making the free end butt quiet sword support 130 of arc bullet arm, can reduce the area of contact of arc bullet arm and quiet sword support 130 to avoid the arc bullet arm to receive pressure and slide at quiet sword support 130 top surface and produce noise etc..

In combination with the above embodiment in which the fixing portion 141 is provided in a plate shape, further, as shown in fig. 2, the top surface of the connecting arm 121 is located below the top surface of the stationary blade bracket 130, and the fixing portion 141 is fixed to the top surface of the stationary blade bracket 130 located between the two supporting lugs 122 and is provided to cover the middle of the stroke hole 131.

In this embodiment, the top surface of the connecting arm 121 is located below the top surface of the stationary blade bracket 130, and the fixing portion 141 is fixed on the top surface of the stationary blade bracket and covers the middle of the travel hole 131, so that the connecting arm 121 of the movable blade bracket 120 does not interfere with the installation of the fixing portion 141 and the stationary blade bracket 130. The fixing portion 141 having a plate shape can shield the middle portion of the travel hole 131 from being used while not affecting the movement of the movable cutter support 120, and can effectively prevent a large amount of cut hair, residue and the like from entering the hair trimmer through the travel hole 131, thereby being more convenient for cleaning the cutter head assembly 100.

In an embodiment, referring to fig. 2 to 5, the shearing blade 111 includes side blades 112 disposed at both sides of the movable blade 110 and a middle blade 113 disposed in the middle of the movable blade 110, and the side blades 112 and the middle blade 113 are all arranged along a predetermined direction; the arc pushing surface 143 is abutted between the side blade 112 and the middle blade 113; the support lugs 122 are fixedly connected between the two rows of side blades 112. The side blades 112 may be used to cut long hair, etc., and the middle blade 113 may be used to cut short hair, etc. The side may be formed by the periphery of the intermediate hole, the blade having a plurality of cutter teeth which may include a plurality of cutter teeth arranged at intervals along a predetermined direction, and the intermediate blade 113, the intermediate blade 113 including a plurality of intermediate holes arranged at intervals along the predetermined direction. By making the arc-shaped pushing surface 143 abut between the side blade 112 and the middle blade 113, the arc-shaped pushing surface 143 is set avoiding the shearing blade 111, so that the cutting effect of the movable blade 110 is not affected while the elastic supporting and pre-compacting effects are ensured. The supporting lugs 122 are fixedly connected between the two rows of side blades 112, so that the connection between the supporting lugs 122 and the movable blade 110 is more stable and reliable.

In an embodiment, as shown in fig. 1 to 8, the tool bit assembly 100 further includes a stationary blade 150, the stationary blade 150 includes a top plate 151 and side plates 152 connected to two sides of the top plate 151, the top plate 151 and the side plates 152 extend along a predetermined direction, and the side plates 152 are disposed obliquely downward and inward from side edges of the top plate 151; a plurality of side cutting holes 153 are formed at the joint of the top plate 151 and the side plate 152 and are arranged at intervals along the preset direction, and the side knife edge 112 is at least partially arranged corresponding to the side cutting holes 153; the middle part of the top plate 151 is provided with a plurality of middle knife holes 154 which are arranged at intervals along the preset direction, and the middle knife edge 113 is at least partially arranged corresponding to the middle knife holes 154; the lower edge of the side plate 152 is fixedly connected to the stationary blade bracket 130; the arc pushing surface 143 elastically pushes the pushing blade 110 so that the moving blade 110 is tightly attached to the top plate 151.

In the present embodiment, the stationary blade 150 is wrapped on the outer side of the movable blade 110, and the movable blade 110 is located below the top plate 151 of the stationary blade 150 and above the two side plates 152 of the stationary blade 150. So that the static knife 150 comprises a top plate 151 and a side plate 152, and a plurality of side cutting holes 153 are formed at the connection part of the top plate 151 and the side plate 152, and the side cutting holes 153 are matched with the side cutting edge 112 of the movable knife 110 to cut long hairs, hair and other long hairs. A plurality of middle knife holes 154 are formed in the middle of the top plate 151, and the middle knife holes 154 are matched with the middle knife edge 113 of the movable knife 110 to cut short hairs with short lengths such as short hairs. The lower edge of the side plate 152 may be fixedly connected to the stationary blade bracket 130 by welding or the like. The arc pushing surface 143 of the supporting spring 140 elastically pushes the knife 110 upwards to enable the movable knife 110 to be clung to the top plate 151, so that the cutting precision of the knife head assembly 100 can be ensured, and the situation that the gap between the movable knife 110 and the static knife 150 is too large to clamp hair and the like can be avoided.

The present utility model also provides a hair trimmer comprising a trimmer body, a driving mechanism and a cutter head assembly 100, wherein the specific structure of the cutter head assembly 100 refers to the above embodiment, a static cutter support 130 of the cutter head assembly 100 is mounted on the trimmer body, the driving mechanism is mounted on the trimmer body, and the driving end of the driving mechanism is connected with a connecting arm 121 of the cutter head assembly 100 to drive a movable cutter 110 of the cutter head assembly 100 to reciprocate along a preset direction; the hair trimmer adopts all the technical schemes of all the embodiments, so that the hair trimmer has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted.

In the present embodiment, the hair trimmer may be specifically a shaver, a hair clipper, a hair trimmer, or the like, and is not particularly limited herein. There may be many forms of the trimmer body, for example, the trimmer body may be an elongated handle, or may be square, cylindrical, etc. The driving mechanism is particularly a linear actuator, the structure of which can be numerous, and different driving mechanisms can be selected and designed according to actual requirements, and the driving mechanism is not particularly limited. The driving mechanism has a driving shaft, so that the driving shaft is fixedly connected or movably connected with the connecting part of the moving blade 110 assembly to drive the moving blade 110 of the blade 110 head assembly 100 to reciprocate along a preset direction, and the shearing blade 111 on the moving blade 110 is matched with the blade hole on the static blade 150 to realize shearing.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (12)

1. A cutter head assembly for a hair trimmer, comprising:

the movable cutter can reciprocate along a preset direction and is provided with a shearing blade;

the static knife support is positioned below the movable knife and provided with a travel hole extending along the preset direction;

the movable cutter support comprises a connecting arm extending along the preset direction and two supporting lugs connected to two ends of the connecting arm respectively, wherein the two supporting lugs are positioned above the travel hole and are fixedly connected to two ends of the movable cutter along the preset direction respectively; and

the supporting elastic sheet comprises a fixing part and an elastic pushing part which are connected with each other, and the fixing part is fixedly connected with the static knife bracket and is arranged at intervals with the movable knife; the elastic pushing part comprises at least two upward convex arc pushing surfaces which are arranged at intervals in the preset direction, and the arc pushing surfaces extend in a bending mode along the preset direction and elastically abut against the inner wall surface of the movable knife to avoid the shearing knife edge.

2. The tool bit assembly of claim 1, wherein the elastic pushing portion is disposed between the two supporting lugs, and at least two arc pushing surfaces are respectively disposed on two sides of the plate surface of the connecting arm.

3. The tool bit assembly of claim 2, wherein a plurality of said arcuate push surfaces are disposed in one-to-one symmetry with respect to said connecting arms.

4. The cutter head assembly of claim 3, wherein two arc pushing surfaces are arranged on one side of the plate surface of the connecting arm at intervals in the preset direction, and the ratio of the distance between the two arc pushing surfaces on one side of the plate surface of the connecting arm to the length of the movable cutter is greater than 0.3 and less than 0.6.

5. The tool bit assembly of claim 4, wherein the support lugs are spaced from adjacent moving blade end surfaces, and wherein a ratio of a width of the support lugs in the predetermined direction to a length of the moving blade is greater than or equal to 0.06 and less than or equal to 0.09.

6. The tool bit assembly of claim 1, wherein the support lugs comprise first and second laterally opposed lugs extending outwardly from opposite faces of the connecting arms, respectively, and wherein top surfaces of the first and second lugs are fixedly attached to the inner wall surface of the movable blade.

7. The tool bit assembly of any one of claims 1 to 6, wherein the fixing portion is provided in a plate shape and is fixedly connected to a middle portion of a top surface of the movable tool holder; the elastic pushing part comprises two arc-shaped elastic sheets which are respectively connected to two sides of the fixing part in the preset direction; the arc spring plate comprises a connecting plate and two arc spring arms extending along the preset direction, and the arc spring arms are downwards bent; one side of the connecting plate is fixedly connected to one end of the fixing part in the preset direction, the other side of the connecting plate is fixedly connected with two arc-shaped spring arms, the two arc-shaped spring arms are respectively arranged on two sides of the plate surface of the connecting arm, and the top wall surface of the arc-shaped spring arm forms the arc-shaped pushing surface.

8. The tool bit assembly of claim 7, wherein an end of the arcuate spring arm distal from the fixed portion is spaced from the movable blade support.

9. The tool bit assembly of claim 7, wherein the top surface of the connecting arm is positioned below the top surface of the stationary blade holder, and the securing portion is secured to the top surface of the stationary blade holder between the two support lugs and covers a central portion of the travel hole.

10. The cutter head assembly according to any one of claims 1 to 6, wherein the shearing blades comprise side blades arranged on two sides of the movable cutter and a middle blade arranged in the middle of the movable cutter, and the side blades and the middle blade are arranged along the preset direction; the arc pushing surface is abutted between the side cutting edge and the middle cutting edge; the supporting lugs are fixedly connected between the two rows of side knife edges.

11. The tool bit assembly of claim 10, further comprising a stationary blade comprising a top plate and side plates connected to both sides of the top plate, the top plate and the side plates each extending in the predetermined direction, the side plates being disposed obliquely downward and inward from side edges of the top plate; a plurality of side cutting holes are formed in the joint of the top plate and the side plate at intervals along the preset direction, and the side cutting edge is at least partially arranged corresponding to the side cutting holes; a plurality of middle cutter holes are formed in the middle of the top plate and are arranged at intervals along the preset direction, and the middle cutting edge is at least partially arranged corresponding to the middle cutter holes; the lower edge of the side plate is fixedly connected to the static knife bracket; the arc pushing surface elastically pushes the movable knife so that the movable knife is clung to the top plate.

12. A hair trimmer comprising a trimmer body, a drive mechanism and a cutter head assembly according to any one of claims 1 to 11, wherein a stationary cutter holder of the cutter head assembly is mounted to the trimmer body, the drive mechanism is mounted to the trimmer body, and a drive end of the drive mechanism is connected to a connecting arm of the cutter head assembly for driving a movable cutter of the cutter head assembly to reciprocate in the predetermined direction.