Blade set for a hair trimmer

Abstract

A blade assembly for a hair trimmer includes a moving blade and a fixed blade. The moving blade moves relative to the fixed blade. The moving blade is equipped with moving blade teeth, and the fixed blade is equipped with stationary blade teeth. A moving blade shearing groove is formed between two adjacent moving blade teeth, and a stationary blade shearing groove is formed between two adjacent stationary blade teeth. The opening of either the moving blade shearing groove or the stationary blade shearing groove is the head of the corresponding moving blade. The head of the moving blade has at least one protruding point, and the line connecting the protruding point and the tip of the corresponding moving blade edge is inclined relative to the shearing direction. The blade assembly of the hair trimmer of this invention, during operation, prevents the rapidly and repeatedly moving blade edges from scratching the skin. It satisfies the need for a sharp blade edge to improve shearing efficiency while preventing hair from slipping out of the shearing groove opening. Simultaneously, it avoids the skin surface being pulled into the shearing groove due to excessive sharpness, thus achieving a balance between protective and shearing effects.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hair trimming device, in particular to a blade set of a hair trimmer. BACKGROUND

[0002] Rotary shavers or reciprocating shavers usually rely on the rotation or oscillation of the blades in the head relative to the guard to achieve the removal of hair such as beard. The movable blades of the existing shavers usually have a tapered end, but when the movable blades move relative to the fixed blades, the hair introduced between the adjacent blade slots is easily pushed out of the blade slots in the direction indicated by the arrow after being pushed by the reverse force of the blades, which affects the efficiency of hair trimming, especially when a large amount of hair trimming is performed. In order to overcome this defect, the disclosed patent makes the following improvements to the existing shaver: the leading linear portion of the movable blade is arranged to be inclined so that the distance between adjacent blade pieces becomes larger as it travels from the front end of the blade piece towards the base end of the blade piece, and the base linear portion is arranged to be connected to the leading linear portion at one end and inclined so that the distance between adjacent blade pieces becomes smaller as it travels from the connection end towards the base end of the blade. After such arrangement, the amount of hair discharged into the blade slot is reduced to some extent, that is, the efficiency of hair trimming is relatively improved, but due to the need for inclined arrangement of the leading linear portion of the blade, the width of the slot of the blade slot will be reduced, which relatively limits the amount of hair entering the blade slot, that is, the efficiency of hair trimming is not significantly improved. If the width of the slot of the blade slot is to be ensured, the overall width of the head of the blade needs to be increased, which will relatively reduce the number of blade teeth. On the one hand, due to the increase of the contact area between the moving blade and the fixed blade, the temperature rise of the blade will be higher, and on the other hand, the efficiency of the shaver will also be limited. That is, the improvement of the shaver in the prior art does not really solve the problem.

[0003] In addition, the cutting edge of the tapered end of the improved shaver is at an angle to the cutting direction, and the head of the tapered end has a horizontal surface, and the side surface where the cutting edge is located forms an acute angle with the horizontal surface. When cutting hair, the human skin is driven into the cutting slot after being rubbed by the fast-moving moving blade, which can cause cuts. Therefore, although the existing open shaver has solved the problem of cutting efficiency to some extent, the safety and comfort of use still need to be improved. SUMMARY

[0004] Therefore, the present application provides a new concept of blade set of a hair trimmer to solve the above problems.

[0005] To achieve the above object, the present application provides the following technical solutions:

[0006] A blade set of a hair clipper, comprising a cutter and a fixed blade, the cutter is movable relative to the fixed blade, the cutter is provided with cutter teeth, the fixed blade is provided with fixed blade teeth, a cutter shearing groove is formed between two adjacent cutter teeth, a fixed blade shearing groove is formed between two adjacent fixed blade teeth, the cutter teeth comprise a head corresponding to an upper notch section, an upper bottom section connected to the upper notch section and relatively close to the bottom of the groove, the head of the corresponding cutter tooth is at the notch of the cutter shearing groove, the head of the cutter tooth has at least one protruding point, and the line between the protruding point and the top end of the corresponding cutter blade is inclined to the shearing direction.

[0007] Preferably, the upper notch section is inclined, and the width of the cutter shearing groove corresponding to the upper notch section increases from the notch to the bottom of the groove in the direction of travel, the cutter surface facing the fixed blade is a shearing surface, and the blade edge of each cutter is arranged along the shearing surface.

[0008] Preferably, the end surface of the head of the cutter tooth is an arc surface, the protruding point is on the arc surface, and the intersection line of the end surface and the notch section is an inclined line, so that the height of the notch section increases from the shearing surface to the direction of travel away from the shearing surface.

[0009] Preferably, the head of the cutter tooth in the shearing direction includes a trapezoid and an arch surface, and the intersection line of the notch section and the cutter head end surface at the corresponding trapezoidal cross section is an inclined line.

[0010] Preferably, the upper bottom section is inclined, and the width of the shearing groove corresponding to the upper bottom section decreases from the notch to the bottom of the groove in the direction of travel, the cutter has a base portion, the cutter teeth are formed on the base portion, the base portion includes a horizontal surface portion and an inclined surface portion, the inclined surface portion is inclined from the shearing surface to the horizontal surface portion, and the width of the cutter shearing groove at the base portion increases in the direction of travel away from the shearing surface.

[0011] Preferably, the upper bottom section includes two intersecting surfaces, and the upper bottom section in the shearing direction is a trapezoid and a trapezoid, a trapezoid and an arch, a trapezoid and a rectangle, a triangle, and a triangle and a rectangle.

[0012] Preferably, at least one of the cutter or the fixed blade is provided with at least one barb unit, the barb unit includes a barb portion, a notch section close to the notch, and a bottom section close to the bottom, the notch section and the bottom section are located on both sides of the barb portion, the notch section has a notch connecting section connected to the barb portion, the bottom section has a bottom connecting section connected to the barb portion, and the width of the shearing groove corresponding to the barb portion is reduced relative to the notch connecting section and the bottom connecting section.

[0013] Preferably, the width of the shearing groove of the notch connecting section gradually decreases from the notch to the bottom or is reduced in a stepped form.

[0014] Preferably, when the width of the shear groove of the notch connecting section gradually decreases from the notch to the groove bottom, the cross section of the shear groove of the notch connecting section is trapezoidal; when the width of the shear groove of the notch connecting section decreases in a stepped form from the notch to the groove bottom, the connecting line at the corresponding position of each step is inclined from the notch to the groove bottom so that the width of the shear groove decreases.

[0015] Preferably, the groove bottom section of the moving blade shear groove or the stationary blade shear groove has at least one outwardly expanded part, and the corresponding width of the shear groove of the outwardly expanded part is greater than the corresponding width of the shear groove of the barb part.

[0016] Preferably, the transition between the barb part and the outwardly expanded part is one of an arc transition, a bevel connecting transition, a turning surface transition, or a combination thereof.

[0017] Preferably, the profile of the shear groove corresponding to the groove bottom section is one of a perfect arc, a rectangle, a trapezoid, a star, or a triangle, or a part of the above-mentioned figures.

[0018] Preferably, the cross section of the head of the moving blade tooth or the stationary blade tooth is one of a triangle, a combination of a triangle and a rectangle, a combination of a trapezoid and a trapezoid, a combination of a trapezoid and a rectangle, a combination of a trapezoid and a tangent sphere, or a combination of a trapezoid and a sphere.

[0019] Preferably, the convex point and the corresponding blade edge are connected by a curved surface or a bevel.

[0020] Preferably, the upper groove bottom section is directly connected to the notch section, and the moving blade or the stationary blade has a side surface facing the moving blade shear groove or the stationary blade shear groove, and the side surface where the upper groove bottom section is located and the side surface where the notch section is located are on the same extension plane.

[0021] The hair clipper of the present application has the following advantages: the moving blade edge of the hair clipper moves quickly and repeatedly during operation, which can cause scratches on the skin, but the sharp blade edge can prevent the hair from escaping from the notch of the shear groove, and the skin surface will not be pulled into the shear groove due to the excessively sharp blade edge, so the protective effect and the shearing effect are both considered; the hair can smoothly and effectively enter the shear groove during use, the barb unit is arranged to "hook" a large amount of hair entering the barb unit to form a limit, and the arrangement of the groove bottom section enables the hair to be quickly sheared without being retained in the shear groove, the present application effectively prevents the hair from escaping while quickly entering and shearing, and the hair is quickly sheared without being retained, thereby efficiently completing the quick shearing of the hair; the shaving razor of the present application simultaneously realizes the dual effects of high efficiency and low temperature rise, and the overall structure does not increase the overall width of the head of the shaving razor, thereby ensuring the number of teeth required for effective cutting. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a schematic view of a conventional razor; Figure 1 Figure 2 is a schematic view of a modified razor;

[0024] Figure 3 is a schematic view of a first embodiment of the present application; Figure 2 Figure 4 is a schematic view of a second embodiment of the present application; Figure 5 is a schematic view of a third embodiment of the present application.

[0025] Figure 6 is a schematic view of a fourth embodiment of the present application. Figure 3 Figure 7 is a schematic view of a head of the razor of the first embodiment; Figure 8 is an enlarged view of a part A of the razor of the first embodiment;

[0026] Figure 9 is a front view of the razor of the first embodiment; Figure 4 Figure 10 is a sectional view of the razor of the first embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 11 is an enlarged view of a part B of the razor of the second embodiment;

[0027] Figure 12 is a front view of the razor of the second embodiment; Figure 5 Figure 13 is a sectional view of the razor of the second embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 14 is an enlarged view of a part C of the razor of the third embodiment;

[0028] Figure 15 is a front view of the razor of the third embodiment; Figure 6 Figure 16 is a sectional view of the razor of the third embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 5 Figure 17 is an enlarged view of a part D of the razor of the fourth embodiment; Figure 18 is a front view of the razor of the fourth embodiment;

[0029] Figure 19 is a sectional view of the razor of the fourth embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 7 Figure 20 is an enlarged view of a part E of the razor of the fourth embodiment; Figure 21 is a front view of the razor of the fourth embodiment;

[0030] Figure 22 is a sectional view of the razor of the fourth embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 8 Figure 23 is a schematic view of a fifth embodiment of the present application; Figure 24 is a schematic view of a sixth embodiment of the present application;

[0031] Figure 25 is a sectional view of the razor of the fifth embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 9 Figure 26 is an enlarged view of a part F of the razor of the fifth embodiment; Figure 8 Figure 27 is a sectional view of the razor of the fifth embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 28 is a schematic view of a seventh embodiment of the present application;

[0032] Figure 29 is a schematic view of an eighth embodiment of the present application; Figure 10 Figure 30 is a sectional view of the razor of the seventh embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 5 Figure 31 is an enlarged view of a part G of the razor of the seventh embodiment; Figure 32 is a sectional view of the razor of the seventh embodiment along a direction B-B, showing a cross section of the head of the razor;

[0033] Figure 33 is a schematic view of a ninth embodiment of the present application; Figure 11 Figure 34 is a schematic view of a tenth embodiment of the present application; Figure 35 is a sectional view of the razor of the ninth embodiment along a direction B-B, showing a cross section of the head of the razor;

[0034] Figure 36 is an enlarged view of a part H of the razor of the ninth embodiment; Figure 12 Figure 37 is a sectional view of the razor of the ninth embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 11 Figure 38 is an enlarged view of a part I of the razor of the tenth embodiment; Figure 39 is a sectional view of the razor of the tenth embodiment along a direction B-B, showing a cross section of the head of the razor;

[0035] Figure 40 is an enlarged view of a part J of the razor of the tenth embodiment; Figure 13 Figure 41 is a sectional view of the razor of the tenth embodiment along a direction B-B, showing a cross section of the head of the razor; Figure 5 Figure 42 is an enlarged view of a part K of the razor of the tenth embodiment; Figure 43 is a sectional view of the razor of the tenth embodiment along a direction B-B, showing a cross section of the head of the razor;

[0036] Figure 44 is an enlarged view of a part L of the razor of the tenth embodiment; Figure 14A structure diagram of the moving cutter in the fourth embodiment of the present application;

[0037] The Figure 15 A Figure 14 A partial enlarged view at D;

[0038] The Figure 16 A Figure 14 A structure diagram of the moving cutter from another angle;

[0039] The Figure 17 A Figure 16 A partial enlarged view at E;

[0040] The Figure 18 A sectional view showing the head of the moving cutter, the sectioning direction being the same as Figure 5 ;

[0041] The Figure 19 A structure diagram of the moving cutter in the fifth embodiment of the present application;

[0042] The Figure 20 A Figure 19 A partial enlarged view at F;

[0043] The Figure 21 A front view of the moving cutter in the fifth embodiment;

[0044] The Figure 22 A sectional view of the moving cutter along the L-L direction, showing the sectional view of the head of the moving cutter; Figure 21 ;

[0045] The Figure 23 A Figure 21 A partial enlarged view at G;

[0046] The Figure 24 A structure diagram of the moving cutter in the sixth embodiment of the present application;

[0047] The Figure 25 A Figure 24 A partial enlarged view at H;

[0048] The Figure 26 A front view of the moving cutter in the sixth embodiment;

[0049] The Figure 27 A Figure 26 A partial enlarged view at I.

[0050] Reference numerals:

[0051] 1. moving blade, 2. moving blade tooth, 3. moving blade shearing groove, 4. slot opening, 5. slot bottom, 6. moving blade tooth body, 7. head, 8. blade edge, 9. side surface, 10. protruding point, 11. upper slot opening section, 12. upper slot bottom section, 13. end surface, 14. inclined surface, 15. base portion, 16. horizontal surface portion, 17. inclined surface portion, 18. barb unit, 19. barb portion, 20. slot opening section, 21. slot bottom section, 22. slot opening connecting section, 23. slot bottom connecting section, 24. flared portion. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0053] The present application will be further described below with reference to the accompanying drawings in the description.

[0054] The present application provides the following technical solutions:

[0055] The present application provides the following technical solutions: Figure 2~7 For the first embodiment of the present application, specifically, in the present embodiment, the blade set of the hair clipper includes a moving blade 1 and a fixed blade, the moving blade 1 moves relative to the fixed blade, the relative movement herein includes relative reciprocating movement, relative rotation, etc. Although the following embodiments of the present application are all described by taking the reciprocating shaving blade as an example, the technical solutions of the present application are also applicable to the rotating blade. Specifically, the moving blade 1 is provided with moving blade teeth 2, the fixed blade is provided with fixed blade teeth, two adjacent moving blade teeth 2 form a moving blade shearing groove 3, and two adjacent fixed blade teeth form a fixed blade shearing groove. As shown in the drawings, the moving blade 1 is an open blade tooth, the end of the moving blade shearing groove 3 where the hair enters is defined as a slot opening 4, and the opposite end is defined as a slot bottom 5. The moving blade tooth 2 has a moving blade tooth body 6 and a head 7, and the slot opening 4 of the moving blade shearing groove 3 is defined as the head 7 of the corresponding moving blade tooth 2, which is formed by protruding from the moving blade tooth body 6. The moving blade tooth 2 has a blade edge 8 formed in the direction from the head 7 to the bottom end of the blade tooth. The surface of the moving blade 1 facing the fixed blade is defined as a shearing surface, and the surface of the moving blade tooth 2 facing the moving blade shearing groove 3 is defined as a side surface 9. The blade edge 8 of the moving blade 1 is formed by the intersection of the shearing surface and the inclined side surface 9 on both sides of the moving blade shearing groove 3, and the blade edges 8 of the moving blades 1 are arranged along the shearing surface. The angle of the blade edge 8 is an acute angle less than 90°. The head 7 of the moving blade tooth 2 has at least one protruding point 10, and the line L between the protruding point 10 and the top end of the corresponding moving blade blade edge 8 is inclined relative to the shearing direction X.

[0056] Specifically, referring to the accompanying drawings of the embodiment, the side surface 9 of the moving cutter tooth 2 comprises an upper notch section 11 corresponding to the head 7, and an upper bottom section 12 close to the bottom 5 of the slot and connected with the upper notch section 11, the upper notch section 11 is arranged obliquely and the width of the moving cutter shearing slot 3 corresponding to the upper notch section 11 increases from the notch 4 to the bottom 5 of the slot.

[0057] The end surface 13 of the head 7 of the moving cutter tooth 2 is an arc surface, the convex point 10 is on the arc surface, and the intersection line of the end surface 13 and the upper notch section 11 is an inclined line, so that the height of the upper notch section 11 increases from the shearing surface to the direction away from the shearing surface. The height of the upper notch section 11 increasing from the shearing surface to the direction away from the shearing surface makes the space of the moving cutter shearing slot 3 corresponding to the upper notch section 11 larger in this direction, and generally, the hair is sheared from one side of the shearing surface, and the sheared hair is more likely to slide off when passing through the space with the increasing trend.

[0058] In the implementation, the convex point 10 and the top end of the corresponding blade edge 8 can be connected by a curved surface or an inclined surface. In the embodiment, as shown in the drawings, the end surface 13 of the head 7 of the moving cutter tooth 2 is an arc surface, and the end surface 13 of the moving cutter tooth 2 can also be provided with a flat surface as shown in the drawings, the convex point 10 is an arbitrary point on the flat surface, and the flat surface and the top end of the blade edge 8 are connected by an arc surface or an inclined surface, so that the head 7 of the moving cutter tooth 2 is a trapezoidal or approximately trapezoidal in the vertical shearing direction, and the approximately trapezoidal is formed by the arc surface connection between the flat surface and the top end of the blade edge 8 or the rounding treatment at both ends of the flat surface.

[0059] The head 7 of the moving cutter tooth 2 can be provided with two or more such convex points 10. As shown in the figure, the convex end face 13 of the head 7 of the cutter tooth can be formed only partially at the head 7 of the moving cutter tooth 2 near the center, and the two sides of the convex end face 13 extend horizontally to the top end of the cutting edge 8 of the moving cutter tooth 2; or as shown in the embodiment, the convex end face 13 extends directly to the top end of the cutting edge 8 of the moving cutter tooth 2. However, in any case, there is such a convex point 10 on the end face 13, so that the line between the convex point 10 and the top end of the cutting edge 8 of the moving cutter tooth 2 is an inclined plane inclined upward relative to the shearing direction. During hair trimming, since the skin is in a continuous surface, which is different from the characteristics of the hair to be trimmed, when the hair trimmer moves on the skin surface, an extrapolation force relative to the top end of the cutting edge 8 is formed from the convex point 10, which avoids the continuous skin surface from entering the shearing groove and causing injury. The shaving cutter of the embodiment realizes the dual effects of high efficiency shearing and low temperature rise, and the overall structure does not increase the overall width of the head 7 of the shaving cutter, ensuring the number of cutter teeth required for effective cutting; the shaving cutter avoids the rapid repeated movement of the cutting edge 8 of the shaving cutter during operation to cause scratches on the skin, and can set a sharp cutting edge 8 to improve shearing efficiency, while not causing the skin surface to be pulled into the shearing groove due to the cutting edge 8 being too sharp, and the protection effect and shearing effect are considered.

[0060] As shown in the accompanying Figure 6 The head 7 of the moving cutter tooth 2 in the horizontal direction is an arc surface, and in specific embodiments, the cross section can also be one of a triangle, a combination of a triangle and a rectangle, a combination of a trapezoid and a trapezoid, a combination of a trapezoid and a rectangle, a combination of a trapezoid and a tangent sphere, or a combination of a trapezoid and a sphere.

[0061] The head 7 of the moving cutter tooth 2 in the horizontal direction is an arc surface, and in specific embodiments, the cross section can also be one of a triangle, a combination of a triangle and a rectangle, a combination of a trapezoid and a trapezoid, a combination of a trapezoid and a rectangle, a combination of a trapezoid and a tangent sphere, or a combination of a trapezoid and a sphere. Figure 8~10The second embodiment of the present application is shown. The same as the first embodiment, the end surface 13 of the head 7 of the moving blade tooth 2 is arc surface. The difference is that the horizontal cross section of the head 7 of the moving blade tooth 2 includes a trapezoidal surface and an arch surface, the intersection line of the arc end surface 13 of the head 7 of the moving blade tooth 2 and the side surface 9 of the upper notch section 11 at the corresponding trapezoidal cross section is inclined line; the upper groove bottom section 12 includes two intersecting inclined surfaces 14. The trapezoidal cross section of the head 7 of the moving blade tooth 2 is formed due to the transition of the inclined surface 14 at the blade edge 8 of the head 7 and the outer arch surface. Similarly, due to the intersection line of the end surface 13 and the side surface 9 of the upper notch section 11 is inclined, the height of the upper notch section 11 increases from the shearing surface to the direction away from the shearing surface. The upper groove bottom section 12 includes two intersecting inclined surfaces 14, specifically, it includes two inclined surfaces 14 with different slopes relative to the shearing surface, so that the width of the corresponding shearing groove of the upper groove bottom section 12 also has the characteristics of decreasing from the notch 4 to the groove bottom 5 in the direction of travel and increasing from the shearing surface to the direction away from the shearing surface. Specifically, the moving blade 1 has a base 15, the moving blade tooth 2 is formed on the base 15, the base 15 includes a horizontal surface 16 and an inclined surface 17, the inclined surface 17 is inclined from the shearing surface to the horizontal surface 16, and the width of the shearing groove 3 of the moving blade in the base 15 increases from the shearing surface to the direction away from the shearing surface.

[0062] The Figure 11~13 The third embodiment of the present application is shown. The same as the first embodiment, the end surface 13 of the head 7 of the moving blade tooth 2 is arc surface, and the same as Figure 13 shown, the horizontal cross section of the head 7 of the moving blade tooth 2 is the same as the second embodiment, that is, it includes a trapezoidal surface and an arch surface. The difference is that the side surface 9 of the upper groove bottom section 12 of the moving blade tooth 2 is intersecting inclined surface and arc surface, so that the width of the corresponding shearing groove of the upper groove bottom section 12 of the moving blade tooth 2 also has the characteristics of decreasing from the notch 4 to the groove bottom 5 in the direction of travel and increasing from the shearing surface to the direction away from the shearing surface.

[0063] The Figure 14~18 The fourth embodiment of the present application is shown. The same as the first embodiment, the end surface 13 of the head 7 of the moving blade tooth 2 is arc surface. The difference is that the side surface 9 of the upper groove bottom section 12 of the moving blade tooth 2 includes two intersecting inclined surfaces 14, one of which intersects the shearing surface to form the blade edge 8, and the other is perpendicular to the shearing direction, so that the width of the corresponding shearing groove of the upper groove bottom section 12 of the moving blade tooth 2 also has the characteristics of decreasing from the notch 4 to the groove bottom 5 in the direction of travel and increasing from the shearing surface to the direction away from the shearing surface.

[0064] TheFigure 19~23 The fifth embodiment of the present application is shown, which is the same as the first embodiment, the end surface 13 of the head 7 of the moving cutter tooth 2 is arc surface, the base 15 includes a horizontal surface 16 and an inclined surface 17, the inclined surface 17 is inclined from the shear surface to the horizontal surface 16, the width of the shear groove 3 of the moving cutter tooth 2 at the base 15 increases from the shear surface to the direction away from the shear surface. The difference is that the horizontal cross section of the head 7 of the moving cutter tooth 2 includes two trapezoidal surfaces, that is, the side surface 9 of the upper notch section 11 includes two intersecting inclined surfaces 14, and the side surface 9 of the upper bottom section 12 also includes two intersecting inclined surfaces 14. The side surface 9 of the upper notch section 11 includes two intersecting inclined surfaces 14, specifically, it includes two inclined surfaces 14 with different slopes relative to the shear surface, so that the width of the shear groove corresponding to the upper notch section 11 also has the characteristics of increasing from the notch 4 to the bottom 5 in the direction of travel, and increasing from the shear surface to the direction away from the shear surface. The side surface 9 of the upper bottom section 12 includes two intersecting inclined surfaces 14, specifically, it includes two inclined surfaces 14 with different slopes relative to the shear surface, so that the width of the shear groove corresponding to the upper bottom section 12 also has the characteristics of decreasing from the notch 4 to the bottom 5 in the direction of travel, and increasing from the shear surface to the direction away from the shear surface.

[0065] In summary of the above five embodiments, the cross section of the head 7 of the moving cutter tooth can be one of triangular, triangular combined with rectangular, trapezoidal combined with trapezoidal, trapezoidal combined with rectangular, trapezoidal combined with tangent spherical surface, or trapezoidal combined with spherical surface.

[0066] Attached Figure 24~27The sixth embodiment of the present application is shown, which is different from the previous embodiments. In this embodiment, at least one of the moving blade 1 or the stationary blade of the blade set of the hair trimmer is provided with at least one barb unit 18, which includes a barb portion 19, a notch segment 20 near the notch 4 and a bottom segment 21 near the bottom 5. The notch segment 20 and the bottom segment 21 are located on both sides of the barb portion 19. The notch segment 20 has a notch connecting segment 22 connected with the barb portion 19. The bottom segment 21 has a bottom connecting segment 23 connected with the barb portion 19. The width of the cutting groove corresponding to the barb portion 19 is reduced compared with the notch connecting segment 22 and the bottom connecting segment 23. The notch connecting segment 22 has the feature that the width of the moving blade cutting groove 3 where it is located is greater than the width of the cutting groove corresponding to the barb portion 19. Similarly, the bottom connecting segment 23 also has the feature that the width of the moving blade cutting groove 3 where it is located is greater than the width of the cutting groove corresponding to the barb portion 19. That is, in any barb unit 18, the width of the moving blade cutting groove 3 in the area of the barb portion 19, the notch connecting segment 22 and the bottom connecting segment 23 is the smallest. The upper bottom segment 12 is directly connected with the notch segment 20. The moving blade 1 or the stationary blade has a side surface 9 facing the moving blade cutting groove 3 or the stationary blade cutting groove. The side surface 9 where the upper bottom segment 12 is located and the side surface 9 where the notch segment 20 is located are in the same extension plane.

[0067] In the implementation, the number of the barb unit 18 is not limited. As shown in the drawings, only one barb unit 18 can be provided, or a plurality of barb units 18 can be provided on the blade tooth in the direction from the notch 4 to the bottom 5. Specifically, the width of the cutting groove of the notch connecting segment 22 can be gradually reduced from the notch 4 to the bottom 5 or reduced in a stepped form. When the width of the cutting groove of the notch connecting segment 22 is gradually reduced from the notch 4 to the bottom 5, the cross section of the cutting groove of the notch connecting segment 22 is trapezoidal. When the width of the cutting groove of the notch connecting segment 22 is reduced in a stepped form from the notch 4 to the bottom 5, the connecting line at the corresponding position of each step is inclined from the notch 4 to the bottom 5, so that the width of the cutting groove is reduced.

[0068] The bottom segment 21 of the moving blade cutting groove 3 or the stationary blade cutting groove has at least one outward expansion portion 24. The width of the moving blade cutting groove 3 corresponding to the outward expansion portion 24 is greater than the width of the moving blade cutting groove 3 corresponding to the barb portion 19. The transition between the barb portion 19 and the outward expansion portion 24 is one of arc transition, inclined surface transition, turning surface transition or a combination thereof. Preferably, the profile of the cutting groove corresponding to the bottom segment 21 is a part of a circle, a rectangle, a trapezoid, a star or a triangle, or a part of the above-mentioned figures.

[0069] With the arc-shaped transition between the barb 19 and the widened portion 24 as an example, the groove bottom below the barb 19 corresponds to an arc-shaped groove. When a large amount of hair enters the groove, the groove bottom connecting section 23 directly connected below the barb 19 extends obliquely towards the inside of the cutter tooth, so that the groove bottom section 21 forms a force pushing the hair entering it to further travel downwards. The widened portion 24 is complementary to the groove bottom connecting section 23, and forms a more open space for the hair under the pushing force, reduces the travel pressure of the flowing hair, and further ensures the rapid entry, non-exit and rapid trimming of the hair. As shown in the figure, the said moving cutter tooth 2 is provided with a blade edge 8 in the travel direction from the notch 4 to the groove bottom 5. The blade edge 8 forms a conical surface at the corresponding arc-shaped groove bottom section 21. This arrangement can further push the cut hair away from the moving cutter tooth 2, and make room for other hair cutting. In other words, it further precisely and rapidly realizes the cutting of hair.

[0070] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the application is not to be limited to these embodiments shown herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A blade assembly for a hair trimmer, comprising a movable blade and a fixed blade, the movable blade moving relative to the fixed blade, the movable blade having movable blade teeth, the fixed blade having fixed blade teeth, a movable blade shearing groove being formed between two adjacent movable blade teeth, and a fixed blade shearing groove being formed between two adjacent fixed blade teeth, the movable blade teeth comprising an upper groove opening section corresponding to the head, and an upper groove bottom section connected to the upper groove opening section and relatively close to the groove bottom, characterized in that: The opening of the moving blade shearing groove corresponds to the head of the moving blade tooth. The head of the moving blade tooth has at least one protrusion. The line connecting the protrusion and the tip of the corresponding moving blade edge is inclined relative to the shearing direction. The upper groove section is inclined, and the width of the moving blade shearing groove corresponding to the upper groove section increases from the groove opening to the groove bottom in the direction of travel. The surface of the moving blade facing the stationary blade is the shearing surface, and the cutting edges of each moving blade are arranged along the shearing surface. The upper groove bottom section is inclined, and the width of the shearing groove corresponding to the upper groove bottom section decreases from the groove opening to the groove bottom in the direction of travel. The moving blade has a base, and the moving blade tooth is formed on the base. The base includes a horizontal surface and an inclined surface. The inclined surface is inclined from the shearing surface toward the horizontal surface. The width of the moving blade shearing groove at the base increases from the shearing surface toward the direction of travel away from the shearing surface.

2. The blade assembly of the hair trimmer according to claim 1, characterized in that: The end face of the moving cutter head is an arc surface, and the protrusion is on the arc surface. The intersection line between the end face and the slot section is an inclined oblique line, so that the height of the slot section increases from the shearing surface toward the direction of travel away from the shearing surface.

3. The blade assembly of the hair trimmer according to claim 1, characterized in that: The cross-section of the moving cutter head in the shearing direction includes a trapezoid and an arched surface, and the intersection line between the groove section and the cutter end face at the corresponding trapezoidal cross-section is an oblique line.

4. The blade assembly of the hair trimmer according to claim 1, characterized in that: The upper trough bottom section includes two intersecting surfaces. The cross-section of the upper trough bottom section in the shear direction is a trapezoid and a trapezoid, a trapezoid and an arch, or a trapezoid and a rectangle, a triangle, or a triangle and a rectangle.

5. The blade assembly of the hair trimmer according to claim 1, characterized in that: At least one of the moving blade or the stationary blade is configured to have at least one barb unit. The barb unit includes a barb portion, a groove opening section near the groove opening, and a groove bottom section near the groove bottom. The groove opening section and the groove bottom section are located on both sides of the barb portion. The groove opening section has a groove opening connecting section connected to the barb portion, and the groove bottom section has a groove bottom connecting section connected to the barb portion. The width of the shearing groove corresponding to the barb portion is limited relative to the groove opening connecting section and the groove bottom connecting section.

6. The blade assembly of the hair trimmer according to claim 5, characterized in that: The width of the shear groove in the groove connection section gradually decreases from the groove opening towards the bottom of the groove, or is limited in a stepped manner.

7. The blade assembly of the hair trimmer according to claim 6, characterized in that: When the width of the shear groove of the groove connection section gradually decreases from the groove opening towards the bottom of the groove, the cross-section of the shear groove of the groove connection section is trapezoidal; when the width of the shear groove of the groove connection section is narrowed in a stepped manner from the groove opening towards the bottom of the groove, the connecting line at the corresponding position of each step is inclined from the groove opening towards the bottom of the groove, thus reducing the width of the shear groove.

8. The blade assembly of the hair trimmer according to claim 5, characterized in that: The bottom section of the moving blade shearing groove or the stationary blade shearing groove has at least one outward expansion portion, and the width of the shearing groove corresponding to the outward expansion portion is greater than the width of the shearing groove corresponding to the barb portion.

9. The blade assembly of the hair trimmer according to claim 8, characterized in that: The transition between the barb and the outward expansion is one of the following: an arc-shaped transition, a sloped connection transition, or a turning surface transition, or a combination thereof.

10. The blade assembly of the hair trimmer according to claim 5, characterized in that: The outline of the shear groove corresponding to the bottom section of the groove is in the shape of an arc, rectangle, trapezoid, star or triangle, or a part of the aforementioned arc, rectangle, trapezoid, star or triangle shape.

11. The blade assembly of the hair trimmer according to claim 1 or 5, characterized in that: The cross-section of the moving or stationary cutting tooth is one of the following: triangle, a combination of triangle and rectangle, a combination of trapezoid and trapezoid, a combination of trapezoid and rectangle, a combination of trapezoid and tangent sphere, or a combination of trapezoid and sphere.

12. The blade assembly of the hair trimmer according to claim 1, characterized in that: The protrusion is connected to the corresponding cutting edge by a curved surface or a beveled surface.

13. The blade assembly of the hair trimmer according to claim 5, characterized in that: The upper groove bottom section is directly connected to the groove opening section. The moving blade or the stationary blade has a side surface facing the moving blade shearing groove or the stationary blade shearing groove. The side surface where the upper groove bottom section is located and the side surface where the groove opening section is located are on the same extension surface.

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