CN111660326A

CN111660326A - Blade assembly

Info

Publication number: CN111660326A
Application number: CN202010506753.5A
Authority: CN
Inventors: 钟海勇
Original assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Current assignee: ZHEJIANG HAISHUN ELECTRICAL CO Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2020-09-15

Abstract

The invention provides a blade assembly, which comprises a static blade and a movable blade moving relative to the static blade, wherein the movable blade and the static blade are respectively provided with a movable blade shearing part and a static blade shearing part, the movable blade shearing part forms a movable blade tooth, the static blade shearing part forms a static blade tooth, the blade assembly also comprises a support limiting part, the support limiting part is arranged on the movable blade or the static blade, the support limiting part limits the distance between the movable blade tooth and the static blade tooth, and point contact or line contact is formed between the support limiting part and the static blade or the movable blade. Elastic point contact or line contact limiting is formed between the supporting limiting part of the blade component and the movable blade or the static blade, so that the contact area between the supporting limiting part and the movable blade or the static blade is reduced, the temperature rise of the blade after long-time use is greatly reduced, and the noise is low; move and form elasticity spacing between sword and the quiet sword, make things convenient for the management and control of size more when concrete implementation.

Description

Blade assembly

Technical Field

The present invention relates to a blade assembly for a hair cutting (shaving) appliance.

Background

CN205238089U discloses a stationary blade and a blade set for application in a hair cutting appliance. The blade set comprises a stationary blade and a movable cutter blade, the movable cutter blade comprising a toothed leading edge, the movable cutter blade being movably arranged within a guide slot defined by the stationary blade such that, upon relative movement between the movable cutter blade and the stationary blade, the at least one toothed leading edge of the movable cutter blade cooperates with corresponding teeth of the stationary blade to enable cutting of hair caught therebetween in a cutting action. The movable cutter blade is restricted by the fixed blade and the holding portion. The movable cutting blade is movably arranged in the guide groove of the fixed blade, the movable cutting blade is completely limited and controlled by the fixed blade and the retaining part, the requirement on size precision is high, and the production control is difficult; in addition, the upper and lower surfaces of the movable cutter blade are fixed between the fixed blade and the holding portion in a line contact manner, the entire contact area is large, the temperature rise is high, and the noise at the time of shaving operation is high.

Disclosure of Invention

In view of the above, the invention provides the blade assembly which is not easy to nappe, high in cutting efficiency and high in use comfort.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a blade subassembly, including quiet sword and with quiet sword relative motion move the sword, move the sword and have respectively with quiet sword and move sword shearing part and quiet sword shearing part, move the sword shearing part and form and move sword tooth, quiet sword shearing part forms quiet sword tooth, blade subassembly has the support locating part, it sets up moving sword or quiet sword to support the locating part, it prescribes a limit to support the locating part move the distance between sword tooth and the quiet sword tooth to support the locating part and move and form point contact or line contact between the sword.

Furthermore, a gap which is less than or equal to 0.05mm is formed between the movable cutter tooth and the static cutter tooth.

Further, the stationary knife is provided with an installation part, the supporting limiting part is arranged on the installation part, and the moving knife is supported and limited on the top surface of the supporting limiting part and is in point contact or line contact with the supporting limiting part.

Further, the movable knife is provided with an installation part, the supporting limiting part is arranged on the installation part, and the stationary knife is in point contact or line contact with the bottom surface of the supporting limiting part.

Furthermore, the supporting and limiting part can rotate relative to the movable knife or the static knife.

Furthermore, the blade component is provided with a positioning structure which prevents the movable blade and the static blade from generating relative motion in the direction perpendicular to the moving direction of the movable blade.

Furthermore, support the locating part and include axle and the axle sleeve of pivoted cover outside the axle, location structure forms in the axle sleeve periphery and relative axle sleeve periphery protrusion or recessed, move the sword have with location structure spacing move the sword wall.

Furthermore, the supporting and limiting part has an elastic force perpendicular to the moving direction of the movable knife, so that the movable knife presses the stationary knife.

Furthermore, support the locating part and include that elastic support is at the shell fragment between moving sword and quiet sword, the shell fragment has two tip and at least one curved elastic support portion of connection between two tip, elastic support portion with move sword or quiet sword line contact.

Furthermore, support the locating part and include shell fragment and support piece, the shell fragment has the elastic force that makes the quiet sword tooth that moves the sword tooth and be close to quiet sword tooth of quiet sword, and elasticity forms the constant head tank, and support piece is located the constant head tank, moves the sword and supports at support piece's top surface and with support piece's top surface point contact or line contact.

Further, quiet sword includes two relative quiet sword walls that set up, and two quiet sword walls are connected to quiet sword shearing part, move sword shearing part and cooperate with quiet sword shearing part.

Further, quiet sword includes quiet sword body and quiet blade holder, quiet sword shearing part forms at quiet sword body, and quiet sword body is connected fixedly with quiet blade holder, the installation department sets up at quiet blade holder.

Further, move the sword including moving the sword body and moving the blade holder, move the sword shearing part and form at moving the sword body, move the sword body and move the blade holder and be connected fixedly, the installation department sets up at moving the blade holder.

Furthermore, the supporting and limiting part is relatively and fixedly arranged on the movable knife or the static knife.

Furthermore, the supporting limiting part comprises a shaft and a shaft sleeve sleeved on the shaft in a rotating manner, the shaft sleeve is provided with positioning structures at two ends of the moving direction of the vertical moving knife, and the positioning structures prevent the moving knife and the static knife from generating relative motion in the moving direction of the vertical moving knife.

Furthermore, the outer peripheral surface of the supporting limiting part in contact with the movable knife or the fixed knife has elasticity.

Furthermore, the supporting limiting part is a rotating shaft, the shaft is provided with a positioning structure, the positioning structure prevents the moving knife and the static knife from generating relative motion in the moving direction of the vertical moving knife, and at least part of the positioning structure protrudes or dents from the outer peripheral surface of the shaft.

The static cutter is provided with at least one static cutter wall, the static cutter shearing part is located on the static cutter wall, the static cutter shearing part forms a static cutter shearing surface, the dynamic cutter shearing part forms a dynamic cutter shearing surface, the static cutter shearing surface and the static cutter wall are arranged in an inclined mode, and the dynamic cutter shearing surface is parallel to the static cutter shearing surface.

The invention has the beneficial effects that: elastic point contact or line contact limiting is formed between the supporting limiting part of the blade component and the movable blade or the static blade, so that the contact area between the supporting limiting part and the movable blade or the static blade is reduced, the temperature rise of the blade after long-time use is greatly reduced, and the noise is low; elastic limit is formed between the movable knife and the static knife, so that the size is more conveniently controlled in specific implementation; the bending deformation of the blade after long-term use is effectively avoided, the structural stability is high, and the efficiency of hair cutting operation is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a blade assembly in accordance with the present invention.

FIG. 2 is an exploded view of one construction of the blade assembly of the present invention.

FIG. 3 is a schematic view of another configuration of the blade assembly of the present invention.

Fig. 4 is a front sectional view of fig. 3.

Fig. 5 is an exploded view of the blade set of fig. 3.

Fig. 6 is a schematic view of the fit relationship between the supporting member and the moving blade.

Fig. 7 is an exploded view of an alternative construction of the bladeset of the present invention.

Fig. 8 is an exploded view of an alternative construction of the bladeset of the present invention.

Fig. 9 is a schematic structural view of the blade assembly of the present invention, showing the stationary knife shear plane and the stationary knife wall being disposed relatively obliquely.

Fig. 10 is a side view of fig. 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention will be further described with reference to the accompanying drawings.

The invention provides the following technical scheme:

as shown in fig. 1 to 10, the blade assembly according to the preferred embodiment of the present invention includes a stationary blade 1 and a movable blade 2 moving relative to the stationary blade 1. The relative movement includes relative movement, relative rotation, and the like common to prior art bladesets. The movable knife 2 and the static knife 1 are respectively provided with a movable knife shearing part 3 and a static knife shearing part 4, the movable knife shearing part 3 forms a movable knife tooth 5, the static knife shearing part 4 forms a static knife tooth 6, the blade component is provided with a supporting and limiting part 7, the supporting and limiting part 7 can be integrated with the static knife 1 or the movable knife 2, and can be integrally formed or secondarily formed, namely, the supporting and limiting part 7 is formed on the static knife 1 or the movable knife 2; or, the supporting and limiting member 7 is a component relatively independent from the stationary blade 1 and the movable blade 2, that is, the supporting and limiting member 7 is installed on the movable blade 2 or the stationary blade 1. The supporting and limiting piece 7 limits the distance between the movable cutter tooth 5 and the fixed cutter tooth 6, and the supporting and limiting piece 7 is in point contact or line contact with the fixed cutter 1 or the movable cutter 2. After the blade group is arranged, the friction resistance of the blade group can be effectively reduced, the temperature rise can be reduced, the service life of the blade group is integrally prolonged, and the noise is low compared with the linear contact limiting in the prior art.

Specifically, quiet sword 1 includes two relative quiet sword walls 11 that set up, and the one end at two quiet sword walls 11 is connected to quiet sword shearing part 4, moves

sword shearing part

3 and 4 cooperations of quiet sword shearing part. Specifically, the two stationary blade walls 11 are parallel to each other, the movable blade 2 includes two movable blade walls 16 parallel to the stationary blade walls 11, and the movable blade shearing portion 3 is formed at one end of the movable blade walls 16 and is opposite to the stationary blade shearing portion 4. In this embodiment, the static knife cutting portion 4 is planar, that is, the cutting surface of the static knife cutting portion 4 is a plane; the movable blade shearing part 3 is in a plane shape parallel to the static blade shearing part 4, that is, the shearing plane of the movable blade shearing part 3 is also in a plane shape. In specific implementation, without limitation, the static blade shearing portion 4 and the moving blade shearing portion 3 may be both curved (arc), or one of them may be curved and the other may be flat, as long as a shearing surface is formed between the two. Specifically, as shown in fig. 9 and 10, the static blade shearing surface 41 formed by the static blade shearing portion 4 is connected between the two static blade walls 11 in an oblique manner, and the moving blade shearing surface 31 formed by the moving blade shearing portion 3 is parallel to the static blade shearing surface 41. The static knife 1 can only be provided with a static knife wall 11, the static knife shearing part 4 is located the static knife wall 11, the static knife shearing part 4 forms a static knife shearing surface 31, the static knife shearing surface 31 is arranged in a relatively inclined manner with the static knife wall 41, and the dynamic knife shearing surface 31 is parallel to the static knife shearing surface 41.

A gap which is less than or equal to 0.05mm is formed between the movable cutter tooth 5 and the static cutter tooth 6. Under the action of the supporting and limiting part 7, the static cutter shearing part 4 and the movable cutter shearing part 3 can be in close contact with each other, and the distance of less than or equal to 0.05mm can also be kept.

In the embodiment, the moving blade 2 reciprocates relative to the stationary blade 1, and the moving blade and the stationary blade may rotate relative to each other in specific implementation, which is not limited to this.

Further, the blade assembly has a positioning structure 13, and the positioning structure 13 prevents the movable blade 2 and the stationary blade 1 from generating relative motion in a direction perpendicular to the moving direction of the movable blade 2. The positioning structure 13 may be disposed on the stationary blade 1, the movable blade 2 or the supporting and limiting member 7. The form of the positioning structure 13 is not limited, and for example, but not limited to, the positioning structure is provided on the stationary blade wall 11 or the movable blade 2, and may be a local bump, a guide groove, or an elastic foot. In this embodiment, the protruding setting of location structure 13 is inboard at each quiet sword wall 11, and two location structures 13 will move sword 2 and spacing in the swing of perpendicular moving sword moving direction, move the sword and move more steadily, the effectual phenomenon of jumping the sword of having avoided. Of course, the positioning structure can also be arranged on the surface of the movable knife edge facing the two fixed knife walls 11 in a protruding way. The positioning structure 13 only needs to partially protrude relative to the fixed blade wall 11 or the movable blade wall 16.

As shown in fig. 1 and 2, the stationary blade 1 is provided with an installation portion 8, and the support stopper 7 is provided in the installation portion 8. Specifically, the supporting and limiting part 7 is located between the mounting part 8 and the moving blade 2 to enable the moving blade shearing part 6 to be constantly close to the static blade shearing part 4. The mounting portion 8 may be a hole, a groove, or a projection (rib, etc.) having a supporting function formed in the stationary blade 1. The supporting and limiting piece 7 is connected with the static knife 1 through a hole or a groove. In the present embodiment, the mounting portion 8 is a hole formed in the stationary blade 1. The movable blade 2 is supported and limited on the top surface of the supporting and limiting part 7 and is in point contact or line contact with the supporting and limiting part 7. The displacement of the movable blade 2 in the direction perpendicular to the moving direction of the movable blade 2 is limited by the supporting and limiting member 7.

The supporting and limiting member 7 may be fixed or rotatable.

By "fixed" is meant: the supporting and limiting part 7 is relatively fixedly installed on the stationary knife 1 or the movable knife 2, that is, when the movable knife 2 moves, the supporting and limiting part 7 cannot rotate under the driving of the movable knife 2. The supporting and limiting part 7 has a supporting and limiting surface. The movable knife 2 is supported on the supporting and limiting surface. When the supporting part limiting piece 7 is installed on the stationary knife 1, the movable knife 2 is supported on the supporting limiting face, the supporting limiting face is located at the top of the supporting limiting piece 7, and the movable knife 2 is in point or line contact with the supporting limiting face. When the supporting and limiting part 7 is installed on the movable knife 2 and is supported and limited through the static knife 1, the supporting and limiting surface is located at the bottom of the supporting and limiting part 7, and the static knife 1 is in point or line contact with the supporting and limiting surface. The fixed supporting and limiting part 7 can be in point or line contact with the static knife 1 or the movable knife 2 as long as the supporting and limiting surface can be in point or line contact with the static knife 1 or the movable knife 2. Therefore, the supporting and limiting member 7 may be a cylinder, a ring, a semicircle, an arch, a triangular pyramid, a polygonal pyramid, etc. or a structure having a cylinder, a ring, a semicircle, an arch, a triangular pyramid, a polygonal pyramid, etc.

By "rotating" is meant: when the movable knife 2 rotates or moves relative to the stationary knife 1, the supporting and limiting part 7 can rotate relative to the movable knife 2 or the stationary knife 1. The supporting and limiting member 7 is cylindrical or bead-shaped. As shown in fig. 7 or 8, the supporting and limiting member 7 may be a rotating shaft, and the shaft is provided with a positioning structure, the positioning structure prevents the moving blade and the stationary blade from moving relative to each other in a direction perpendicular to the moving direction of the moving blade, and at least a portion of the positioning structure protrudes or is recessed from the outer circumferential surface of the shaft. Furthermore, the outer peripheral surface of the supporting and limiting member 7 contacting the movable blade 2 or the stationary blade 1 has elasticity. The elastic force of the supporting and limiting member 7 can be used as elastic pre-pressure to keep the movable blade 2 close to the stationary blade 1. The material of supporting the locating part 7 can select for use rubber, silica gel etc., the supporting locating part 7 of "rotary type" can be a single cylinder, as shown in fig. 8, in order to incite somebody to action the supporting locating part 7 is installed at quiet sword 1 for the example and is explained: the fixed knife wall 11 is provided with a shaft hole, two ends of the supporting limiting part 7 are inserted into the shaft holes of the corresponding fixed knife wall 11, and the moving knife 2 is supported on the upper part of the supporting limiting part 7 and is limited between the fixed knife shearing part 4 and the supporting limiting part 7. The supporting and limiting part 7 can rotate along with the movement of the movable blade 2. Of course, the supporting and limiting member 7 may be tightly disposed in the shaft hole, and in this case, the supporting and limiting member 7 is a "fixed" supporting and limiting member.

The "rotary" supporting and limiting member 7 can also be set to the state shown in fig. 7, including the shaft 17 and the shaft sleeve 20 sleeved outside the shaft in a rotating manner, further, the positioning structure 13 is formed at the periphery of the shaft sleeve 20 and protrudes or is recessed relative to the periphery of the shaft sleeve 20, and the movable blade 2 has the movable blade wall 16 limited by the positioning structure 13. Of course, the positioning structure 13 may also be selectively disposed on the stationary blade 1 or the movable blade 2, and is not limited to the illustration in the drawings.

Specifically, as shown in fig. 7, when the supporting and limiting member 7 has no elasticity, the supporting and limiting member 7 may be a cylinder, a ball, a semicircle, an arch, a triangular pyramid, or the like that is installed on the stationary blade 1 or the movable blade 2 and can limit the distance between the movable blade shearing portion 3 and the stationary blade shearing portion 4, and any structure that can form a point contact or a line contact with the stationary blade 1 or the movable blade 2 is suitable for limiting the supporting and limiting member 7 in the present invention. Specifically, when the supporting and limiting part 7 is installed on the stationary knife 1, the movable knife 2 forms point contact or line contact with the supporting and limiting part 7 when moving relative to the stationary knife; when the supporting and limiting piece 7 is installed on the movable knife 2, the supporting and limiting piece 7 moves along with the movable knife 2, and the supporting and limiting piece 7 and the stationary knife 1 form point contact or line contact. The supporting and limiting part 7 can be rotatably arranged on the static knife 1 or the movable knife 2, and can also be relatively fixedly arranged on the static knife 1 or the movable knife 2. When the supporting and limiting part 7 needs to be installed on the stationary knife 1 or the movable knife 2 in a rotating mode, the supporting and limiting part 7 is a cylinder or a steel ball, after the setting, the supporting and limiting part 7 rotates under the driving of the movable knife 2, the movable knife 2 is in contact with different outer surface lines of the supporting and limiting part 7 in the moving process, the temperature rise can be further reduced, and the service life of the blade assembly is prolonged.

The supporting and limiting member 7 may be configured to have an elastic force perpendicular to the moving direction of the movable blade 2 so that the movable blade 2 elastically presses the stationary blade 1. In the present embodiment, the following two supporting position-limiting members 7 with elastic force are disclosed, specifically as follows:

as shown in fig. 2, the supporting and limiting member 7 includes an elastic sheet 18 elastically supported between the movable blade 2 and the stationary blade 1, the elastic sheet 18 has two end portions and at least one arc-shaped elastic supporting portion 17 connected between the two end portions, and the elastic supporting portion 17 is in line contact with the movable blade 2 or the stationary blade 1. The elastic supporting part 17 is curved in an arc shape, a spherical surface or an arch shape, and the movable blade 2 is supported on the top surface of the elastic supporting part 17 to form point contact type limiting or line contact type limiting with the elastic supporting part 17. After the arrangement, the contact area between the movable blade 2 and the elastic supporting part 17 is reduced, and the temperature rise after long-time use is greatly reduced.

As shown in fig. 3 to 6, another structure for supporting the limiting member 7 is shown, the mounting portion 8 is a hole formed in the stationary knife 1, specifically, the supporting limiting member 7 includes an elastic sheet 18 and a supporting member 19, the elastic sheet 18 has an elastic force for making the moving knife teeth 5 of the moving knife 2 close to the stationary knife teeth 6 of the stationary knife 1, the elastic sheet 18 forms the positioning slot 10, and the supporting member 19 is located in the positioning slot 10. The movable blade 2 is supported on the top surface of the support member 19 and is in point contact or line contact with the top surface of the support member 19. Specifically, quiet sword wall 11 sets up the mounting groove as installation department 8, and shell fragment 18 is located the mounting groove, shell fragment 18 includes two link 181, two arc connecting portion 182 that extend towards shell fragment 18 center by link 181 respectively of spacing stretching into mounting groove both ends, arc connecting portion 182 accumulates and makes the elastic potential energy that moving sword shearing portion 3 is close to quiet sword shearing portion 4, and constant head tank 10 is located between two arc connecting portion 182, moves sword 2 and supports 19 upper portions of support piece and 19 some or line contacts with support piece.

The support and stop members 7 of the blade assembly of fig. 5 and 6 are identical in construction, and differ in that: in the blade assembly shown in fig. 6, the stationary blade 1 includes a stationary blade body 110 and a stationary blade base 112, the stationary blade shearing portion 4 and the stationary blade wall 11 are both formed on the stationary blade body 110, the stationary blade body 110 is connected and fixed with the stationary blade base 112, the installation portion 8 is disposed on the stationary blade base 112, and the support limiting member 7 is installed on the installation portion 8 of the stationary blade base 112. In the blade assembly shown in fig. 5, the stationary blade 1 has only the stationary blade body 110, and the stationary blade holder 112 is not provided, and the support stopper 7 is directly mounted on the stationary blade body 110. In this embodiment, the supporting and limiting member 7 is mounted on the stationary blade 1, but the supporting member 19 may be mounted on the movable blade 2. Move the sword 2 and set up installation department 8, support locating part 7 and move the sword 2 through installation department 8 and be connected, at this moment, quiet sword 1 and the bottom surface point contact or the line contact who supports locating part 7, that is to say support spacing through quiet sword 1 support locating part 7,

quiet sword

1 and 19 bottom points of support piece or line contact.

The support element 19 may also be fixedly arranged in the positioning slot 10, or may be rotatably or rollably arranged in the positioning slot 10. The supporting member 19 may be a cylinder or a ball (sphere), and the supporting member 19 can rotate in the positioning slot 10 under the driving of the movable blade 2. However, the present invention is not limited to this, as long as the supporting member 19 can form a supporting position with the stationary blade 1 or the movable blade 2 in a point or line contact manner, and therefore, the supporting member 19 may also be a triangle, a polygon, a semicircle, a ring, etc., and at this time, the supporting member 19 will not rotate under the driving of the movable blade 2, that is, the supporting member 19 is relatively fixedly disposed in the positioning slot 10.

Specifically, the supporting member 19 may be further configured as follows:

the supporting member 19 comprises a shaft 17 and a shaft sleeve 20, the shaft sleeve 20 is rotatably sleeved on the shaft 17, and the shaft sleeve 20 and the movable blade 2 or the stationary blade 1 form point or line contact. The surface of the shaft sleeve 20 is provided with an elastic body, the material of the shaft sleeve 20 can be rubber, silica gel and the like, and the elastic force of the shaft sleeve 20 can be used as elastic pre-pressure to keep the movable knife 2 close to the stationary knife 1.

The shaft sleeve 20 is provided with two annular walls 201 at intervals along the axial direction of the shaft sleeve 20, and the two annular walls 201 replace the positioning structure 13 to limit the displacement of the movable knife 2 in the direction perpendicular to the moving direction of the movable knife. The movable blade wall 16 extends into the annular groove defined by the two annular walls 201, and preferably, the two movable blade walls 16 just contact with the annular walls 201. Of course, the positioning structure 13 may also be an annular groove formed at intervals along the axial direction of the shaft sleeve 20, and the movable blade wall 16 extends into the annular groove for limiting.

In a specific implementation, as shown in fig. 7, the mounting portion 8 is a hole provided in the stationary blade holder 112, and the stationary blade holder 112 has two wall portions extending along the moving direction of the stationary blade, and the wall portions are provided with positioning structures 13 for guiding and limiting the movement of the stationary blade. The stationary blade body 110 and the stationary blade base 112 may be snap-fit, plug-in, injection molded, or connected by other fasteners, etc.

Of course, the movable blade 2 may also be configured to include a movable blade body and a movable blade holder, the movable blade shearing portion 3 is formed on the movable blade body, the movable blade body is connected and fixed with the movable blade holder, and at this time, the mounting portion 8 is disposed on the movable blade holder. The movable knife body and the movable knife seat can be connected in a clamping way, in an inserting way, in an injection molding way or connected through other fasteners and the like, and the details are not repeated.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a blade subassembly, including quiet sword and with quiet sword relative motion move the sword, move the sword and have respectively with quiet sword shearing part and quiet sword shearing part, move the sword shearing part and form and move sword tooth, quiet sword shearing part forms quiet sword tooth, its characterized in that: the blade component is provided with a supporting and limiting part, the supporting and limiting part is arranged on the movable blade or the static blade, the supporting and limiting part limits the distance between the movable blade teeth and the static blade teeth, and the supporting and limiting part and the static blade or the movable blade form point contact or line contact.

2. The blade assembly of claim 1, wherein: a gap which is less than or equal to 0.05mm is formed between the movable cutter teeth and the static cutter teeth.

3. The blade assembly of claim 1, wherein: the static knife is provided with an installation part, the supporting limiting part is arranged at the installation part, and the moving knife is supported and limited on the top surface of the supporting limiting part and is in point contact or line contact with the supporting limiting part.

4. The blade assembly of claim 1, wherein: the movable knife is provided with an installation part, the supporting limiting part is arranged on the installation part, and the stationary knife is in point contact or line contact with the bottom surface of the supporting limiting part.

5. The blade assembly of claim 1, wherein: the supporting and limiting part can rotate relative to the movable knife or the static knife.

6. The blade assembly of claim 1, wherein: the blade component is provided with a positioning structure which prevents the moving blade and the static blade from generating relative motion in the direction perpendicular to the moving direction of the moving blade.

7. The blade assembly of claim 1, wherein: the supporting limiting part comprises a shaft and a shaft sleeve sleeved outside the shaft, the positioning structure is formed on the periphery of the shaft sleeve and protrudes or is recessed relative to the periphery of the shaft sleeve, and the movable knife is provided with a movable knife wall limited by the positioning structure.

8. The blade assembly of claim 1, wherein: the supporting and limiting part has elastic force perpendicular to the moving direction of the moving knife and enables the moving knife to press the static knife.

9. The blade assembly of claim 1 or 8, wherein: the supporting limiting part comprises an elastic sheet which is elastically supported between the movable knife and the static knife, the elastic sheet is provided with two end parts and at least one arc-shaped elastic supporting part connected between the two end parts, and the elastic supporting part is in line contact with the movable knife or the static knife.

10. The blade assembly of claim 1 or 8, wherein: the supporting and limiting part comprises an elastic sheet and a supporting piece, the elastic sheet has elastic force which enables moving blade teeth of the moving blade to be close to static blade teeth of the static blade, the elastic sheet forms a positioning groove, the supporting piece is located in the positioning groove, and the moving blade is supported on the top surface of the supporting piece and is in point contact or line contact with the top surface of the supporting piece.

11. The blade assembly of claim 1, wherein: the static knife comprises two static knife walls which are oppositely arranged, the shearing part of the static knife is connected with the two static knife walls, and the shearing part of the moving knife is matched with the shearing part of the static knife.

12. The blade assembly of claim 3, wherein: the static knife comprises a static knife body and a static knife holder, a static knife shearing part is formed on the static knife body, the static knife body is fixedly connected with the static knife holder, and the installation part is arranged on the static knife holder.

13. The blade assembly of claim 4, wherein: the movable knife comprises a movable knife body and a movable knife holder, the shearing part of the movable knife is formed on the movable knife body, the movable knife body is fixedly connected with the movable knife holder, and the installation part is arranged on the movable knife holder.

14. The blade assembly of claim 1, wherein: the supporting and limiting part is relatively fixedly arranged on the movable knife or the static knife.

15. The blade assembly of claim 5, wherein: the supporting limiting part comprises a shaft and a shaft sleeve sleeved on the shaft in a rotating mode, the two ends of the shaft sleeve in the moving direction of the movable knife are provided with positioning structures, and the positioning structures prevent the movable knife and the static knife from moving relatively in the moving direction of the movable knife.

16. The blade assembly of claim 1, wherein: the supporting and limiting part has elasticity with the outer peripheral surface contacted with the movable knife or the static knife.

17. The blade assembly of claim 5, wherein: the supporting limiting part is a rotating shaft, the shaft is provided with a positioning structure, the positioning structure prevents the moving knife and the static knife from generating relative motion in the moving direction of the vertical moving knife, and at least part of the positioning structure protrudes or dents from the peripheral surface of the shaft.

18. The blade assembly of any of claims 1 to 8 and 12 to 18, wherein: the static cutter is provided with at least one static cutter wall, the static cutter shearing part is located on the static cutter wall, the static cutter shearing part forms a static cutter shearing surface, the dynamic cutter shearing part forms a dynamic cutter shearing surface, the static cutter shearing surface and the static cutter wall are arranged in an inclined mode, and the dynamic cutter shearing surface is parallel to the static cutter shearing surface.