CN214136137U - Razor blade - Google Patents

Abstract

The utility model provides a razor blade, including blade and blade holder, the blade has shearing part and connecting portion, shearing part forms the sword tooth, connecting portion are connected with the blade holder, the blade passes through the mode of buckle with the blade holder and is connected fixedly, it is spacing that at least part has the elastic type to be connected between the connecting portion of blade and the blade holder. Razor blade solve the problem of assembly degree easy control in the blade assembling process, reduced because of the cooperation is crossed the relative motion between blade and the blade holder under the non-exogenic action that the pine leads to, avoided beating of blade, the stability of the shear plane when guaranteeing the shearing operation for form effectual shear plane between sword and the quiet sword, improve the efficiency of shearing and use the sense organ.

Description

Razor blade

Technical Field

The utility model relates to a blade of 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. Generally, the movable knife needs to be fixed through a supporting seat, the movable knife and the supporting seat are connected and fixed in a buckling mode, the requirement on the size precision of the buckling connection position between the movable knife and the supporting seat is high, and if the clamping is too tight, the blade is easy to deform, so that the cutting effect is influenced; if the card is too loose, the defects of no cutting or non-ideal cutting (such as napping and jumping) and high noise in the shaving operation can occur, so that the production management is difficult.

Disclosure of Invention

In view of this, the utility model provides a razor blade that is difficult for napping, cuts out efficient, the noise is little.

In order to achieve the above object, the utility model provides a following technical scheme:

a razor blade comprises a blade and a blade holder, wherein the blade is provided with a cutting part and a connecting part, the cutting part forms cutter teeth, the connecting part is connected with the blade holder, the blade and the blade holder are fixedly connected in a buckling mode, and at least part of the connecting part of the blade and the blade holder is elastically connected and limited.

Further, the blade or the blade holder is provided with an elastic structure, and the elastic structure has an elastic force perpendicular to the shearing direction, so that the blade and the blade holder are elastically connected.

Furthermore, one of the blade or the cutter holder is provided with a buckling groove, the other of the blade or the cutter holder is provided with a buckling part connected with the buckling groove, and the elastic structure is arranged in the buckling groove or the buckling part.

Furthermore, one of the blade or the cutter holder is provided with a positioning groove, the other of the blade or the cutter holder is provided with an elastic structure matched with the positioning groove, and the elastic structure is provided with an elastic part capable of accumulating elastic force in the vertical shearing direction.

Furthermore, one of the blade or the cutter holder is provided with a positioning groove, the other of the blade or the cutter holder is provided with an elastic structure matched with the positioning groove, and the elastic structure is made of an elastic material.

Furthermore, the connecting portion of blade includes two parallel arrangement's connecting wall, the shearing portion is connected between two connecting walls, the blade holder is connected with the buckle between the connecting wall, the locating slot forms the bottom at the connecting wall of blade, elastic construction sets up at the blade holder, the blade passes through the elastic support of locating slot on elastic construction.

Furthermore, the elastic structure is provided with a relatively convex protruding part, and the positioning groove is in elastic limit contact with the protruding part.

Furthermore, the elastic structure extends along the shearing direction, the elastic structure comprises a connecting end and an elastic supporting end, the connecting end is connected with the cutter holder, the elastic supporting end is far away from the connecting end, the protruding portion is located at the elastic supporting end, and the protruding portion protrudes relative to the elastic supporting end in the vertical shearing direction.

Furthermore, the blade is U-shaped in cross section in the vertical shearing direction, and the connecting part is connected between the two connecting walls in an arc shape.

Furthermore, the positioning groove is provided with an opening, a supporting part which is opposite to the opening and is connected with the elastic structure elastic support, and two groove side surfaces which are oppositely arranged and connected between the opening and the supporting part, wherein at least one groove side surface is an inclined surface so that the caliber of the positioning groove from the opening to the supporting part is gradually reduced.

Furthermore, an intermediate positioning structure is arranged between the cutter holder and the blade, and the intermediate positioning structure limits the relative displacement between the blade and the cutter holder along the shearing direction.

Further, at least part of the connecting part of the blade and the blade seat form plane fit along the shearing direction.

Furthermore, a supporting and limiting structure is arranged between the blade and the blade holder, and the supporting and limiting structure is provided with a plane which is in close contact with the blade or the blade holder, or the supporting and limiting structure and the part of the blade or the blade holder which is in close contact with the blade or the blade holder are in the same plane.

The beneficial effects of the utility model reside in that: razor blade solve the problem of assembly degree easy control in the blade assembling process, reduced because of the cooperation is crossed the relative motion between blade and the blade holder under the non-exogenic action that the pine leads to, avoided beating of blade, the stability of the shear plane when guaranteeing the shearing operation has guaranteed to move and has formed effectual shear plane between sword and the quiet sword, improves the efficiency of shearing and uses the sense organ.

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 these drawings without creative efforts.

FIG. 1 is a perspective view of a razor blade according to the present invention;

FIG. 2 is an exploded perspective view of a razor blade according to the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2, showing a detailed state of the elastic structure;

fig. 4 is an enlarged view of B in fig. 2, showing a detailed state of the positioning groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

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

The utility model provides a following technical scheme:

referring to fig. 1-4, there are shown preferred embodiments of razor blades according to the present invention. Specifically, the razor blade comprises a blade 1 and a blade holder 2, the blade 1 is provided with a cutting part 11 and a connecting part 12, the cutting part 11 forms cutter teeth 3, the connecting part 12 is connected with the blade holder 2, the blade 1 and the blade holder 2 are fixedly connected in a buckling mode, and at least part of the connecting part 12 of the blade 1 and the blade holder 2 is provided with elastic connection limiting. The form of the cutter teeth 3 is not limited. The cutter teeth 3 may be formed only in the cutting portion 11, or the cutter teeth 3 may be formed in both the cutting portion 11 and the connecting portion 12; of course, it is also possible to provide the cutting tooth 3 only on the connecting portion 12 according to actual requirements, that is, it is not necessary to provide the cutting tooth 3 on the cutting portion 11, which is only a general name for each portion of the blade 1, and no limitation is therefore made.

The blade 1 and the tool holder 2 are fixedly connected in a buckling manner, if the buckling structure is arranged too tightly, local deformation (for example, concave-convex deformation or warping) of the blade 1 is easily caused at the joint of the buckle due to too dead clamping (too large mutually matched acting force between the blade 1 and the tool holder 2), so that the shaving sharpness is abnormal, the local temperature rise of the blade 1 is too large, a user feels unsatisfactory in the shaving process, the shaving effect is poor, and the blade 1 is permanently deformed and cannot be recovered after long-term use; on the contrary, if the snap-fit over-feeding is performed, the blade 1 is prone to shaking due to the dragging of hairs and the interaction between the blades during the cutting operation, and noise is generated, and the shaking (or shaking) also increases the temperature rise of the blade 1. The term "elastic connection limit" means that the connection between the cutting insert 1 and the tool holder 2 is elastic, for example, an elastic material may be disposed at the connection (limit contact portion) between the cutting insert 1 and the tool holder 2, or an elastic structure 8 may be disposed at the connection between the cutting insert 1 and the tool holder 2, and the elastic material or the elastic structure 8 is required to provide an elastic connection between the cutting insert 1 and the tool holder 2 in a continuous tight state. After setting up like this, the buckle cooperation between blade 1 and the blade holder 2 can be the state of loose fit, then forms spacingly through being connected between this kind of elastic connection blade 1 and the blade holder 2, ensures that the too tight state of buckle can not appear again when blade 1 can hug closely the cooperation with blade holder 2. A buckling opening is formed between the blade 1 and the tool apron 2, and in order to avoid over-tight buckling, a relative moving gap is formed between the blade 1 and the tool apron 2 at the position where the buckling is connected; moreover, generally, such a movement gap is not parallel to the movement direction of the blade 1, therefore, in order to compensate for the relative movement between the blade 1 and the tool rest 2 caused by the buckling margin, the elastic force of the elastic structure 8 at least has an elastic component for limiting the relative movement between the two. For example, taking the blade 1 shown in fig. 1 as an example, the blade 1 actually extends along the moving direction of the blade 1 when in use, and the blade 1 and the tool holder 2 are connected by a snap fit and then have a snap fit allowance in the direction perpendicular to the moving direction of the blade 1, so that at this time, the elastic structure 8 is required to have an elastic force perpendicular to the moving direction, so that the relative free movement between the blade 1 and the tool holder 2 is elastically limited, and the relative movement between the blade 1 and the tool holder 2 under the action of a non-external force (the relative acting force of another blade 1 and the acting force of hair) caused by over-loose matching is reduced, thereby avoiding the bounce of the blade 1, ensuring the stability of the shearing surface during shearing operation, ensuring that an effective shearing surface is formed between the moving blade and the stationary blade, and improving the shearing efficiency and the use sense.

In addition, it is emphasized that the razor blade according to the invention does not limit the scope of application of the blade, namely: whether the blade 1 is a moving blade or a stationary blade is not limited; the specific form of the blade 1 is not limited, and may be a sheet structure (doctor blade), a U-shaped structure, a circular knife, or the like; the movement state of the blade 1 is not limited, and may be, for example, a moving type, a rotating type, or the like. In the blade 1 shown in the drawing of this embodiment, taking the blade 1 as a movable blade as an example, the blade 1 is U-shaped, that is, the cross section of the blade 1 in the vertical shearing direction is U-shaped, specifically, the connecting portion 12 of the blade 1 includes two connecting walls 13 arranged in parallel, and the connecting portion 12 is connected between the two connecting walls 13 in an arc shape. The middle of the cutter holder 2 is provided with a connecting seat 9, the connecting seat 9 is usually connected with a power output end, and the movable cutter can be driven by a power source to perform reciprocating translation to trim hair. The shearing part 11 is connected between the two connecting walls 13, and the tool holder 2 is in snap connection with the connecting walls 13.

It is to be emphasized that: the elastic structure 8 has an elastic force perpendicular to the shearing direction, so that the blade 1 and the tool holder 2 form an elastic connection, wherein the elastic force may be the elastic structure 8 formed by an elastic material, that is, the elastic force itself is because the elastic structure 8 is made of an elastic material, the elastic material may be TPE, TPR, etc., the elastic structure 8 may be locally disposed between the blade 1 and the tool holder 2, or the elastic structure 8 may be disposed between the blade 1 and the tool holder; besides, the elastic force may be generated by the elastic structure 8 itself accumulating a certain elastic force due to the structural design so as to maintain the elastic limit connection between the cutting insert 1 and the tool holder 2, for example, the elastic structure 8 is designed to have flexibility, elastic legs, an arch shape, a hemisphere, etc. so as to accumulate the elastic force so as to enable the cutting insert 1 and the tool holder 2 to abut against each other.

The positioning of the elastic structure 8 is illustrated below:

in specific implementation, the elastic structure 8 may be disposed at a position where the insert 1 is snap-connected to the holder 2: one of the blade 1 or the tool holder 2 is provided with a buckling groove 4, the other one of the blade 1 or the tool holder 2 is provided with a buckling part 10 connected with the buckling groove 4, and the elastic structure 8 can be arranged in the buckling groove 4 or the buckling part 10. In the drawings shown in this embodiment, the fastening groove 4 is formed in the blade 1, the fastening portion 10 is formed in the blade holder 2, the fastening portion 10 is a protruding fastening protrusion (such as a locking pin, a hook-shaped structure, or a spring piece) disposed on the blade holder 2, when the elastic structure 8 is disposed in the fastening groove 4, it is preferable that the material of the groove sidewall contacting with the fastening portion 10 is an elastic material to form the elastic structure 8, and the specific form of the elastic structure 8 is not limited, for example, a protrusion or the like may be disposed on a surface cooperating with the fastening portion 10. When the elastic structure 8 is disposed in the latch portion 10, a portion of the latch portion 10 contacting with the latch groove 4 may be configured to have elasticity, for example, at least the contacting portion is made of an elastic material, or the latch portion 10 is directly configured as the elastic structure 8, for example, the latch portion 10 is a structure having a flexible force and protruding relative to the tool holder 2.

In practical implementation, the elastic structure 8 may also be disposed at a position where the insert 1 is not in snap fit with the holder 2, for example: one of the blade 1 or the tool holder 2 is provided with a positioning groove 5, the other one of the blade 1 or the tool holder 2 is provided with an elastic structure 8 matched with the positioning groove 5, and the elastic structure 8 is provided with an elastic part 7 capable of accumulating elastic force in the vertical shearing direction. The elastic part 7 may be made of an elastic material, or the elastic part 7 may be provided in a form capable of accumulating an elastic force, such as having features of a dome shape, a warp shape, a spiral shape, and the like. In the present embodiment, in particular as follows, the positioning slot 5 is formed at the bottom of the connecting wall 13 of the blade, the elastic structure 8 is arranged on the tool holder 2, and the blade 1 is elastically supported on the elastic structure 8 through the positioning slot 5. The elastic structures 8 are arranged at the positions of two sides of the tool apron 2 corresponding to the connecting walls 13, and 4 groups of the elastic structures 8 are arranged in a pairwise opposite mode. In specific implementation, at least one elastic structure 8 is provided, and the number of the elastic structures is not limited.

As shown in fig. 3, the elastic structure 8 has a relatively protruded projection 15, and the positioning slot 5 is elastically in limit contact with the projection 15. The elastic structure 8 extends along the shearing direction, the elastic structure 8 comprises a connecting end and an elastic supporting end, the connecting end is connected with the tool apron 2, the elastic supporting end is far away from the connecting end, the protruding portion 15 is located at the elastic supporting end, and the protruding portion 15 protrudes relative to the elastic supporting end in the vertical shearing direction and then elastically abuts against the top wall of the positioning groove 5 (the top and the bottom are based on the direction shown in fig. 2).

Of course, the elastic structure 8 may also be disposed at a position where the insert 1 is not snap-fitted with the holder 2, and the material of the elastic structure 8 is an elastic material. In this case, the elastic force of the elastic structure 8 may be formed by compression of the material itself, or may be formed by the structural design of the elastic structure 8 itself as described above, or may be both of them, that is, at least a part of the elastic material is adopted to increase the elastic force on the structural design of the elastic structure 8 itself, and at the same time, the friction force between the insert 1 and the holder 2 can be increased, and the relative movement between the two can be reduced.

Further, as shown in fig. 1 and 2, the positioning slot 5 has an opening 51, a supporting portion 52 opposite to the opening 51 and elastically supported and connected to the elastic structure 8, and two slot sides 53 opposite to the opening 51 and connected between the opening and the supporting portion 16. The groove side 53 is inclined, so that the aperture of the positioning groove 5 is reduced by the size component from the opening to the supporting part 16. In specific implementation, at least one of the groove side surfaces 53 may be an inclined surface so as to gradually reduce the aperture of the positioning groove 5 from the opening to the supporting portion 16. After setting up like this, constant head tank 5 can form taper fit with elastic construction 8, and final assembled relation between the two is interference fit connection, is difficult for the pine to take off. When the cutter holder is specifically implemented, the material of the cutter holder 2 usually mainly comprises a plastic injection molding part, considering the influences of deformation and the like of the plastic injection molding part along with the extension of the service time, the structural design of the conical surface also reserves a space for the deformation allowance of the plastic injection molding part, the shearing effect cannot be influenced due to the fact that the local assembly is too tight due to the fact that the size of the plastic part is increased or the plastic part is deformed, the flatness of the blade 1 is higher, and the blade is more comfortable to use.

In this embodiment, the positioning groove 5 is provided at the bottom end of the blade 1 for example, and in specific implementation, the position where the positioning groove 5 is provided is not limited, and may be provided at a position close to the top end of the blade 1, for example.

In order to reduce the relative movement between the blade 1 and the tool holder 2 along the moving direction of the blade 1, an intermediate positioning structure 17 is further arranged between the tool holder 2 and the blade 1, and the intermediate positioning structure 17 can limit the relative displacement between the blade 1 and the tool holder 2 along the shearing direction. Specifically, the intermediate positioning structure 17 includes a limit groove 6 formed in the insert 1 or the insert seat 2, and a limit block 14 formed in the insert seat 2 or the insert 1. As shown in fig. 1 and 2, in this embodiment, the limiting groove 6 is formed at the bottom of the blade 1, the limiting block 14 is disposed on the blade holder 2, and the limiting block 14 is inserted into the limiting groove 6 to limit the movement of the blade 1 and the blade holder 2 through the connection therebetween.

In order to improve the fit between the blade 1 and the holder 2 after assembly and prevent the shearing effect from being affected by the partial bending (concave-convex deformation) of the blade 1, in a specific implementation, a plane fit is formed at least partially between the connecting portion 12 of the blade 1 and the holder 2 along the shearing direction. The term "plane contact" means that the contact part of the blade 1 and the blade holder 2 is in plane contact in a contact state, so that the blade 1 does not bend and deform due to local stress concentration under the supporting and limiting of the blade holder 2; the 'plane joint is formed at least partially along the shearing direction' means that the plane joint forms a state extending along the shearing direction, so that certain guide and limit can be formed in the moving direction of the blade 1, the degree of matching between the blade 1 and the cutter holder 2 can be ensured, and the phenomenon of cutter jump of the blade 1 during cutting is effectively avoided.

Further, a supporting and limiting structure is arranged between the blade 1 and the blade holder 2, and the supporting and limiting structure can be formed on the blade 1 or the blade holder 2. The supporting and limiting structure is provided with a plane which is in close contact with the blade 1 or the tool holder 2, or the supporting and limiting structure and the part of the blade 1 or the tool holder 2 which is in close contact with each other are in the same plane. The flat surface in close contact may be provided at a plurality of positions extending in the moving direction of the blade 1 at intervals, or may be provided at only one position. The material at the plane may be an elastic material. The supporting and limiting structure can also be a plurality of local convex structures, and the points of the convex structures, which are attached to the blade 1 or the tool holder 2, are on the same plane. Because the thickness of the blade 1 is only 0.5 silk meter generally, after the arrangement, the flatness of the blade 1 after installation is ensured, the straightness of the blade 1 is improved, and particularly under the condition of the U-shaped knife, the flatness of the shearing surface is improved, the noise is low, the shearing effect is better, and the shearing efficiency is better. In this embodiment, the support and limit structure is two parallel connecting walls 13, and the connecting walls 13 are in planar contact with the tool holder 2.

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 (13)

1. A razor blade characterized by: including blade and blade holder, the blade has shearing portion and connecting portion, the shearing portion forms the sword tooth, connecting portion are connected with the blade holder, the blade is connected fixedly through the mode of buckle with the blade holder, it is spacing that at least part has elastic type connection between the connecting portion of blade and the blade holder.

2. The razor blade of claim 1, wherein: the blade or the cutter holder is provided with an elastic structure, and the elastic structure has an elastic force vertical to the shearing direction, so that the blade and the cutter holder are elastically connected.

3. The razor blade of claim 2, wherein: one of the blade or the cutter holder is provided with a buckling groove, the other one of the blade or the cutter holder is provided with a buckling part connected with the buckling groove, and the elastic structure is arranged in the buckling groove or the buckling part.

4. The razor blade of claim 2, wherein: one of the blade or the cutter holder is provided with a positioning groove, the other of the blade or the cutter holder is provided with an elastic structure matched with the positioning groove, and the elastic structure is provided with an elastic part capable of accumulating elastic force in the vertical shearing direction.

5. The razor blade of claim 2, wherein: one of the blade or the cutter holder is provided with a positioning groove, the other one of the blade or the cutter holder is provided with an elastic structure matched with the positioning groove, and the elastic structure is made of an elastic material.

6. The razor blade of claim 4 or 5, wherein: the connecting portion of blade includes two parallel arrangement's connecting wall, the shearing part is connected between two connecting walls, the blade holder is connected with the buckle between the connecting wall, the locating slot forms the bottom at the connecting wall of blade, elastic construction sets up at the blade holder, the blade passes through the elastic support of locating slot on elastic construction.

7. The razor blade of claim 6, wherein: the elastic structure is provided with a convex part which is relatively convex, and the positioning groove is in elastic limit contact with the convex part.

8. The razor blade of claim 7, wherein: the elastic structure extends along the shearing direction, the elastic structure comprises a connecting end and an elastic supporting end, the connecting end is connected with the cutter holder, the elastic supporting end is far away from the connecting end, the protruding portion is located at the elastic supporting end, and the protruding portion protrudes relative to the elastic supporting end in the vertical shearing direction.

9. The razor blade of claim 6, wherein: the blade is U-shaped in the cross-section of perpendicular shearing direction, the curved connection of connecting portion is between two connecting walls.

10. The razor blade of claim 4 or 5, wherein: the positioning groove is provided with an opening, a supporting part which is opposite to the opening and is connected with the elastic structure through elastic support, and two groove side surfaces which are oppositely arranged and are connected between the opening and the supporting part, wherein at least one groove side surface is an inclined surface so that the caliber of the positioning groove from the opening to the supporting part is gradually reduced.

11. The razor blade of any of claims 1 to 5, wherein: and an intermediate positioning structure is also arranged between the cutter holder and the blade and limits the relative displacement of the blade and the cutter holder along the shearing direction.

12. The razor blade of any of claims 1 to 5, wherein: at least part of the connecting part of the blade and the blade holder form plane fit along the shearing direction.

13. The razor blade of any of claims 1 to 5, wherein: the supporting and limiting structure is arranged between the blade and the blade holder and is provided with a plane which is in close contact with the blade or the blade holder, or the supporting and limiting structure and the part of the blade or the blade holder which is in close contact with the blade or the blade holder are in the same plane.

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