razor

Abstract

A razor comprises a movable blade and a fixed blade, wherein at least one of the movable blade or the fixed blade is provided with at least one barb unit, the barb unit comprising a barb portion, a notch section proximal to the notch, and a groove bottom section proximal to the groove bottom, the notch section and the groove bottom section being located on either side of the barb portion, the notch section comprising a notch connecting section connected to the barb portion, and the groove bottom section comprising a groove bottom connecting section connected to the barb portion, the width of the shearing groove corresponding to the barb portion being narrower than the notch connecting section and the groove bottom connecting section. When the razor of the present invention is in use, hair can smoothly and effectively enter the shearing groove, the provision of the barb unit allows a large number of hairs entering the barb unit to be "hooked" to form a limit, and at the same time, in conjunction with the provision of the groove bottom section, the hairs can be quickly sheared without being retained in the shearing groove. The present invention guides hair to quickly enter while effectively preventing it from falling out and quickly shearing without being retained, thereby efficiently completing the rapid shearing of hair.

Description

Technical Field

[0001] The present invention relates to the technical field of hair trimming equipment, in particular to a razor. Background Art

[0002] Rotary shavers or reciprocating shavers usually rely on the rotation or swing of the blades in their cutter heads relative to the blade mesh to shave beards and other hair. Figure 1 、 2 As shown, the movable blades of existing razors generally have tapered ends. However, when the movable blade moves relative to the fixed blade, hair introduced between adjacent blade slots is easily pushed out of the slots in the direction indicated by the arrows by the reverse force of the blades, thereby affecting the efficiency of hair trimming. This problem is particularly evident when trimming a large number of hairs. To overcome this defect, the disclosed patent makes the following improvements to the existing razor: the leading linear portion of the movable blade is arranged to be tilted so that the distance between adjacent blade elements increases as it moves from the front end of the blade element toward the base end of the blade element, and the base linear portion is arranged to have one end connected to the leading linear portion and tilted so that the distance between adjacent blade elements decreases as it moves from the connection end toward the base end of the blade element. This arrangement reduces the amount of hair that enters the blade slots to a certain extent, which in turn improves the hair cutting efficiency. However, due to the inclined linear portion of the leading edge of this type of blade, the width of the slot opening of the blade slot becomes smaller, which in turn limits the amount of hair that enters the slot. This means that the hair cutting efficiency is not significantly improved. To ensure the slot opening width of the blade slot, the overall width of the blade head end needs to be increased. With this arrangement, the number of teeth will decrease. On the one hand, the temperature rise of the blade will increase due to the increased contact area between the moving and static blades. On the other hand, this will also limit the cutting efficiency of the razor. In other words, the improvements to razors in the prior art have not truly solved this problem. Summary of the Invention

[0003] In view of this, the present invention provides a shaver with a completely new concept to solve the above problems.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A razor comprises a movable blade and a fixed blade, the movable blade moves relative to the fixed blade, the movable blade is provided with movable blade teeth, and the stationary blade is provided with stationary blade teeth, a movable blade shearing groove is formed between two adjacent movable blade teeth, and a stationary blade shearing groove is formed between two adjacent stationary blade teeth, at least one of the movable blade or the stationary blade is configured to have at least one barb unit, the barb unit comprising a barb portion, a notch section near the notch, and a groove bottom section near the groove bottom, the notch section and the groove bottom section being located on both sides of the barb portion, the notch section having a notch connecting section connected to the barb portion, the groove bottom section having a groove bottom connecting section connected to the barb portion, and the width of the shearing groove corresponding to the barb portion being reduced relative to the notch connecting section and the groove bottom connecting section.

[0006] Preferably, the width of the shear groove of the notch connecting section gradually decreases from the notch toward the groove bottom or is reduced in a stepped manner.

[0007] Preferably, when the width of the shear groove of the notch connecting section gradually decreases from the notch toward the bottom of the groove, 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 is reduced in a stepped manner from the notch toward the bottom of the groove, the connecting line at the corresponding positions of each level of the steps is inclined from the notch toward the bottom of the groove so that the width of the shear groove is reduced.

[0008] Preferably, the groove bottom section of the movable knife shearing groove or the stationary knife 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.

[0009] Preferably, the transition between the barb portion and the outward expansion portion is an arc-shaped transition, an inclined surface connection transition, a turning surface transition, or a combination thereof.

[0010] Preferably, the contour of the shear groove corresponding to the groove bottom section is in the shape of an arc, a rectangle, a trapezoid, a star or a triangle, or a part of the above shapes.

[0011] Preferably, the cross section of the movable blade teeth or the stationary blade teeth 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.

[0012] Preferably, the end of the movable or stationary tooth close to the slot section is a head, and the head of the movable or stationary tooth has at least one protruding point so that the line between the protruding point and the cutting edge of the corresponding movable or stationary knife is inclined relative to the shearing direction.

[0013] Preferably, the upper notch section close to the notch is inclined and the width of the shear groove corresponding to the upper notch section increases from the notch to the bottom of the groove. The end face of the moving tooth head is an arc surface, the protruding point is on the arc surface, and the intersection line of the end face and the upper notch section is an inclined oblique line, so that the height of the upper notch section increases from the shear surface toward the direction of travel away from the shear surface.

[0014] Preferably, the protruding point is connected to the corresponding cutting edge through a curved surface or an inclined surface.

[0015] Preferably, the cross section of the head of the movable blade tooth or the stationary blade tooth is arc-shaped, triangular, arched or trapezoidal.

[0016] Preferably, the upper groove bottom section is inclined and the width of the shear groove corresponding to the upper groove bottom section decreases in the direction of travel from the groove mouth to the groove bottom, the movable tool has a base, and the movable tool teeth are formed on the base, the base includes a horizontal surface and an inclined surface, the inclined surface is inclined from the shear surface toward the horizontal surface, and the width of the movable tool shear groove at the base increases from the shear surface toward the direction of travel away from the shear surface.

[0017] Preferably, at least one of the movable knife or the stationary knife is configured to have at least one upper barb unit, and the upper barb unit includes an upper barb portion, an upper notch section close to the notch, and an upper groove bottom section close to the groove bottom. The upper notch section is inclined and the width of the shear groove corresponding to the upper notch section increases in the direction of travel from the notch to the groove bottom. The upper groove bottom section is inclined and the width of the shear groove corresponding to the upper groove bottom section decreases in the direction of travel from the notch to the groove bottom.

[0018] Preferably, the upper groove bottom section is directly connected to the notch section, and the movable knife or the stationary knife has a side wall surrounding the corresponding shear groove, and the side wall where the upper groove bottom section is located and the side wall where the notch section is located are on the same extension plane.

[0019] The beneficial effects of the present invention are as follows: when the razor of the present invention is in use, hair can enter the shearing groove smoothly and effectively, and the setting of the barb unit enables a large number of hairs entering the barb unit to be "hooked" to form a limit, and at the same time, the setting of the groove bottom section enables the hair to be quickly sheared without being retained in the shearing groove. The present invention effectively prevents the hair from falling out while guiding the hair to enter quickly and shears quickly without being retained, thereby efficiently completing the rapid shearing of the hair; the razor of the present invention simultaneously achieves the dual effects of high-efficiency shearing and low temperature rise, and the setting of the overall structure does not increase the overall width of the razor head, thereby ensuring the number of teeth required for effective cutting; the razor avoids scratches on the skin caused by the rapidly and repeatedly moving cutting edge of the razor when working, and can provide a sharp cutting edge to improve the shearing efficiency, while preventing the skin surface from being pulled into the shearing groove and causing accidental injury due to the cutting edge being too sharp, thereby taking both protective effect and shearing effect into consideration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Attachment Figure 1 It is a common form of razor in the prior art;

[0022] Attachment Figure 2 It is an improved form of the razor in the prior art;

[0023] Attachment Figure 3 This is a schematic structural diagram of a razor according to a first embodiment of the present invention;

[0024] Attachment Figure 4 This is a schematic structural diagram of the movable knife in the first embodiment;

[0025] Attachment Figure 5 for Figure 4 A partial enlarged view of point A in the middle;

[0026] Attachment Figure 6 This is a front view of the moving knife of the first embodiment;

[0027] Attachment Figure 7 Shows the structure of the groove bottom section of different forms of the moving knife;

[0028] Attachment Figure 8 This is a schematic structural diagram of the movable knife in the second embodiment;

[0029] Attachment Figure 9 for Figure 8 A partial enlarged view of point B in the middle;

[0030] Attachment Figure 10 This is a front view of the moving knife of the second embodiment;

[0031] Attachment Figure 11 For attachment Figure 10 Cross-sectional view of one of the teeth after cutting along the CC direction;

[0032] Attachment Figure 12 This is the main view of one of the teeth;

[0033] Attachment Figure 13 This is another type of moving knife in the second embodiment;

[0034] Attachment Figure 14 for Figure 14 A partial enlarged view of point C in the middle;

[0035] Attachment Figure 15 Shown is a schematic diagram of the structure of a movable knife provided with different convex points;

[0036] Attachment Figure 16 A schematic structural diagram of the movable knife in the third embodiment;

[0037] Attachment Figure 17 for Figure 16 A partial enlarged view of point D in the middle;

[0038] Reference numerals:

[0039] 1. Moving knife, 2. Stationary knife, 3. Moving knife teeth, 4. Stationary knife teeth, 5. Moving knife shearing groove, 6. Stationary knife shearing groove, 7. Barb unit, 71. Barb portion, 8. Notch, 72. Notch section, 9. Groove bottom, 73. Groove bottom section, 721. Notch connecting section, 731. Groove bottom connecting section, 732. Outward expansion portion, 10. Head, 11. Protruding point, 12. Upper barb unit, 121. Upper barb portion, 122. Upper notch section, 123. Upper groove bottom section, 13. Side wall, 14. Base, 141. Horizontal surface, 142. Inclined surface. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] The following will be combined with the instructions Figures 3 to 17 The present invention is further described.

[0042] The present invention provides the following technical solutions:

[0043] Example 1

[0044] like Figures 3 to 7 The first embodiment of the present invention discloses a razor. Specifically, the razor includes a movable blade 1 and a fixed blade. The movable blade 1 moves relative to the fixed blade. The relative motion here includes relative repetitive movement, relative rotation, etc. Although the embodiments of the present invention are described using a razor that moves relative to the fixed blade as an example, the technical solutions of the present invention are also applicable to rotary blades. The movable blade 1 is provided with movable blade teeth 3, and the fixed blade 2 is provided with fixed blade teeth 4. In this embodiment, the blade teeth of both the movable and fixed blades 2 are arranged along the shearing direction. A movable blade shearing groove 5 is formed between two adjacent movable blade teeth 3, and a fixed blade shearing groove 6 is formed between two adjacent fixed blade teeth 4. The shearing groove is defined as a groove opening 8 at one end where hair enters, and a groove bottom 9 at the opposite end. It should be noted that the embodiments disclosed in the present invention are described using the movable blade 1 as an example in which a barb unit 7 is provided. In actual implementation, the barb unit 7 can also be provided only on the fixed blade 2, or on both the fixed blade 2 and the movable blade 1. The details will not be repeated here.

[0045] Refer to the attached Figure 5 、 6 The specific structure of the barb unit 7 provided on the movable blade 1 will be further described below: the barb unit 7 includes a barb portion 71, a notch section 72 near the notch 8, and a bottom section 73 near the bottom 9. Taking the illustrated direction as an example, the notch section 72 and bottom section 73 are located on either side of the barb portion. The notch section 72 includes a notch connection section 721 connected to the barb portion, and the bottom section 73 includes a bottom connection section 731 connected to the barb portion. The width of the shear groove corresponding to the barb portion is reduced relative to the notch connection section 721 and the bottom connection section 731. In other words, the notch connection section 721 is part of the notch section 72 and directly connected to the barb portion 71, while the bottom connection section 731 is part of the bottom section 73 and directly connected to the barb portion. The notch connection section 721 has the following characteristic: the width of the movable blade shear groove 5 in which it is located is greater than the width of the shear groove corresponding to the barb portion. Similarly, the groove bottom connecting section 731 also has the following characteristics: the width of the movable blade shearing groove 5 in which it is located is greater than the width of the corresponding shearing groove of the barb portion. In other words, in any barb unit 7, the width of the movable blade shearing groove 5 corresponding to the area of ​​the barb portion 71, the notch connecting section 721, and the groove bottom connecting section 731 is smallest at the barb portion. The upper groove bottom section 123 is directly connected to the notch section 72. The movable blade 1 or the stationary blade 2 has a side wall 13 surrounding the corresponding shearing groove. The side wall 13 of the upper groove bottom section 123 and the side wall 13 of the notch section 72 are on the same extending plane.

[0046] In specific implementation, the number of the barb units 7 should not be limited. As shown in the drawings, only one barb unit 7 can be provided, or multiple barb units 7 can be provided on the blade in the direction from the notch 8 to the groove bottom 9.

[0047] Furthermore, the width of the shear groove of the notch connection section 721 gradually decreases from the notch 8 toward the groove bottom 9 or is reduced in a stepped manner. That is to say, when the width of the movable knife shear groove 5 of the notch connection section 721 gradually decreases from the notch 8 toward the groove bottom 9, the cross-section of the movable knife shear groove 5 corresponding to the notch connection section 721 is trapezoidal; when the width of the shear groove of the notch connection section 721 is reduced in a stepped manner from the notch 8 toward the groove bottom 9, the connecting line at the corresponding positions of each step is inclined from the notch 8 toward the groove bottom 9, so that the width of the shear groove is reduced.

[0048] As attached Figure 6 As shown, the groove bottom section 73 of the movable knife shear groove 5 or the stationary knife shear groove 6 has at least one outward expansion portion 732, and the width of the shear groove corresponding to the outward expansion portion 732 is greater than the width of the shear groove corresponding to the hook portion. Preferably, the transition between the hook portion and the outward expansion portion 732 is an arc transition, a bevel connection transition, a turning surface transition, or a combination thereof. Figure 7 As shown in Figures 7-1 to 7-7, the contour of the shear groove corresponding to the groove bottom section 73 is in the shape of an arc, rectangle, trapezoid, star, or triangle, or a portion of such a figure. Taking the arc-shaped transition between the barb portion and the flared portion 732 as an example, the groove bottom below the barb portion forms a corresponding arc-shaped groove. When a large number of hairs enter this groove, the groove bottom connecting section 731 directly connected to the barb portion extends obliquely toward the interior of the blade teeth, thus forming a vertical force on the groove bottom section 73. The force of the groove bottom section 73 pushes the hairs entering therein further downward. The widened flared portion 732 complements the groove bottom connecting section 731, forming a more open accommodation space for the rapidly moving hairs under the driving force, reducing the traveling pressure of the flowing hairs, thereby ensuring rapid entry and preventing them from escaping, allowing for rapid trimming. As shown in the figure, the movable blade teeth 3 are provided with cutting edges in the direction of travel from the notch 8 toward the notch bottom 9. The cutting edges form a conical surface corresponding to the arc-shaped notch bottom section 73. After such a setting, the sheared hair can be further pushed away from the movable blade teeth 3, thereby making way for other hair to be sheared, that is, the hair can be sheared more accurately and quickly.

[0049] The cross section of the movable blade teeth 3 or the stationary blade teeth 4 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. The blade teeth with the above cross sections are easier to form without affecting the cutting effect.

[0050] As shown in the figure, the movable blade 1 is provided with multiple barb units 7. The width of the movable blade shearing groove 5 corresponding to these barb units gradually decreases from the notch section 72 toward the groove bottom section 73. The provision of multiple barb units 7 further limits hair from slipping out, thereby further improving shearing efficiency. Similarly, the groove bottom section 73 further forms an outwardly flared portion 732 to reduce the travel pressure of flowing hair, ensuring rapid entry and preventing hair from slipping out, thereby achieving a fast and efficient trimming operation. The razor of this embodiment allows hair to enter the shearing groove smoothly and efficiently during use. The provision of the barb units 7 allows a large number of hairs entering the barb units 7 to be "hooked" and limited. Furthermore, the provision of the groove bottom section 73 allows hair to be quickly sheared without being retained in the shearing groove. This invention guides hair quickly into the razor while effectively preventing it from slipping out and quickly shearing it without being retained, thereby achieving efficient and rapid hair shearing.

[0051] Example 2

[0052] As attached Figures 8 to 15 As shown, this is the second preferred embodiment of the present invention. The difference between this embodiment and the first embodiment is that the movable knife 1 also has an anti-scratch function, that is, it prevents the sharp edge of the movable knife 1 from bringing the human skin into the shear groove and causing scratches when it moves quickly.

[0053] Specifically, as attached Figure 12As shown, the end of the movable blade tooth 3 or the stationary blade tooth 4 close to the slot section 72 is a head 10, and the head 10 of the movable blade tooth 3 or the stationary blade tooth 4 has at least one protruding point 11 so that the line L between the protruding point 11 and the cutting edge of the corresponding movable blade 1 or stationary blade 2 is inclined relative to the shearing direction X. The protruding point 11 is on the head 10 of the movable blade tooth 3 and protrudes relative to the cutting edge of the head 10. Taking the illustrated direction as an example, the movable blade 1 moves back and forth when moving, and the line between the top of the cutting edge of the head 10 and the protruding point 11 is inclined downward from the protruding point 11 toward the cutting edge. In other words, there is at least one point on the head 10 of the movable blade 1, so that the point is higher than the top of the cutting edge of the head 10 in the vertical shearing direction. Human skin differs from the hair to be cut in that it is a continuous surface. With this arrangement, the protruding point 11 and the cutting edge act as an inclined surface. Since the skin's extension corresponding to the notch 8 is aligned with a component of the shear force, this inclined surface creates an outward thrust on the human skin. This effectively prevents human skin from entering the shear groove and causing cuts, even when the movable blade 1 is operating at high speed. The phrase "the protruding point 11 and the cutting edge act as an inclined surface" does not necessarily mean that the connection between the protruding point 11 and the cutting edge is an inclined surface. Specifically, the connection between the protruding point 11 and the corresponding cutting edge can be a curved surface, an inclined surface, a combination of a curved surface and an inclined surface, or some other transitional surface. In other words, the transition between the protruding point 11 and the cutting edge is not limited; as long as the protruding point 11 provides the head 10 of the movable blade 1 with a component of the force that restricts the entry of human skin into the shear groove, it suffices. As shown in the figure, the head 10 of the movable blade tooth 3 has a cross-sectional shape, such as an arc, a triangle, an arch, or a trapezoid. The protruding point 11 is formed on any point of the head 10 such as an arc, a triangle, an arch or a trapezoid.

[0054] When the end face of the movable tooth head is an arc surface, the protruding point is on the arc surface, and the intersection line of the end face and the upper notch section is an inclined oblique line, so that the height of the upper notch section increases from the shearing surface toward the direction away from the shearing surface. Figure 15 As shown in Figures 15-1 to 15-6, the protrusion 11 is any point on the arc-shaped protrusion of the head 10. Specifically, the number of arc-shaped protrusions on the head 10 and the specific protrusion form (such as the arc angle of the arc) are not limited. The razor in this embodiment achieves the dual effects of high-efficiency cutting and low temperature rise. The overall structure does not increase the overall width of the razor head 10, ensuring the number of teeth required for effective cutting. The razor avoids scratches on the skin caused by the rapid and repeated movement of the cutting edge during operation. It can provide a sharp cutting edge to improve cutting efficiency while preventing the skin surface from being pulled into the shear groove due to an overly sharp cutting edge, thus achieving both protective and cutting effects.

[0055] Example 3

[0056] As attached Figures 16 and 17 FIG. 1 is a third preferred embodiment of the present invention. This embodiment differs from the first embodiment in that the movable blade 1 further comprises an upper barb unit 12. Specifically, the movable blade 1 comprises at least one upper barb unit 12, comprising an upper barb portion 121, an upper notch section 122 proximate the notch opening 8, and an upper bottom section 123 proximate the notch bottom 9. The upper notch section 122 is inclined, and the width of the shear groove corresponding to the upper notch section 122 increases from the notch opening 8 toward the notch bottom 9. The upper bottom section 123 is inclined, and the width of the shear groove corresponding to the upper bottom section 123 decreases from the notch opening 8 toward the notch bottom 9. The upper barb unit 12, in conjunction with the barb unit 7, further improves shearing efficiency, effectively preventing hair from escaping from the notch opening 8 and preventing hair from becoming stuck within the shear groove.

[0057] It should be emphasized that the barb unit 7 described in the present invention can be formed on only one of the movable knife 1 or the stationary knife 2, or the barb unit 7 can be provided on both; similarly, the protrusion 11 can be formed on only one of the movable knife 1 or the stationary knife 2, or the protrusion 11 can be provided on both for protection; the upper barb unit 12 can be formed on only one of the movable knife 1 or the stationary knife 2, or the upper barb unit 12 can be provided on both.

[0058] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A razor comprising a movable blade and a fixed blade, wherein the movable blade moves relative to the fixed blade, the movable blade being provided with movable blade teeth, the fixed blade being provided with 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, wherein: At least one of the movable knife or the stationary knife is configured to have at least one barb unit, and the barb unit includes a barb portion, a slot section close to the slot and a slot bottom section close to the slot bottom, the slot section and the slot bottom section are located on both sides of the barb portion, the slot section has a slot connecting section connected to the barb portion, and the slot bottom section has a slot bottom connecting section connected to the barb portion, the width of the shear groove corresponding to the barb portion is reduced relative to the slot connecting section and the slot bottom connecting section, the end of the movable knife tooth or the stationary knife tooth close to the slot section is a head, and the head of the movable knife tooth or the stationary knife tooth has at least one protruding point so that the line between the protruding point and the cutting edge of the corresponding movable knife or stationary knife is inclined relative to the shearing direction.

2. The shaver according to claim 1, characterized in that: The width of the shear groove of the notch connecting section is gradually reduced from the notch toward the groove bottom or is reduced in a step-like manner.

3. The shaver according to claim 2, characterized in that: When the width of the shear groove of the notch connecting section gradually decreases from the notch toward the bottom of the groove, 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 is reduced in a stepped manner from the notch toward the bottom of the groove, the connecting line at the corresponding positions of each level of steps is inclined from the notch toward the bottom of the groove, so that the width of the shear groove is reduced.

4. The shaver according to claim 1, wherein: The groove bottom section of the movable knife shearing groove or the stationary knife 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.

5. The shaver according to claim 4, characterized in that: The hook portion and the outward expansion portion are connected by an arc-shaped transition, an inclined surface connection transition, a turning surface transition or a combination thereof.

6. The shaver according to claim 4, characterized in that: The contour of the shear groove corresponding to the groove bottom section is in the shape of a major arc, rectangle, trapezoid, star or triangle, or a part of the above-mentioned major arc, rectangle, trapezoid, star or triangle.

7. The shaver according to claim 1, characterized in that: The cross section of the movable blade teeth or the stationary blade teeth 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.

8. The shaver according to claim 7, characterized in that: The barb unit includes an upper notch section close to the notch, the upper notch section is inclined and the width of the shear groove corresponding to the upper notch section increases from the notch to the bottom of the groove, the end face of the movable tooth head is an arc surface, the protruding point is on the arc surface, and the intersection line of the end face and the upper notch section is an inclined oblique line, so that the height of the upper notch section increases from the shear surface toward the direction of travel away from the shear surface.

9. The shaver according to claim 7, characterized in that: The protruding points are connected to the corresponding cutting edges by curved surfaces or inclined surfaces.

10. The shaver according to claim 7, characterized in that: The cross section of the head of the movable blade tooth or the stationary blade tooth is in the shape of an arc, a triangle, an arch or a trapezoid.

11. The shaver according to claim 7, characterized in that: 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 mouth to the groove bottom. The movable tool has a base portion, and the movable tool 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 toward the horizontal surface portion. The width of the movable tool shearing groove at the base portion increases from the shearing surface toward the direction of travel away from the shearing surface.

12. The shaver according to claim 1, characterized in that: At least one of the movable knife or the stationary knife is configured to have at least one upper hook unit, and the upper hook unit includes an upper hook portion, an upper slot section close to the slot opening, and an upper slot bottom section close to the slot bottom. The upper slot section is inclined and the width of the shear groove corresponding to the upper slot section increases in the direction of travel from the slot opening to the slot bottom. The upper slot bottom section is inclined and the width of the shear groove corresponding to the upper slot bottom section decreases in the direction of travel from the slot opening to the slot bottom.

13. The shaver according to claim 12, characterized in that: The upper groove bottom section is directly connected to the notch section, and the movable knife or the stationary knife has a side wall surrounding the corresponding shear groove, and the side wall where the upper groove bottom section is located and the side wall where the notch section is located are on the same extension plane.

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