Shaving razor blade and cartridge assembly and trimming appliance

Abstract

The present application relates to a kind of shaving blade and cutter head assembly and trimming appliance, it is characterized in that, if several spaced apart static tooth slot is at least through panel, left support and right support from the direction of orthographic projection of panel outer surface observation, static blade tooth is formed between adjacent static tooth slot in panel, and the left guide tooth and the right guide tooth are formed by the respective combination of the two side edges of panel and left support and right support, the left guide tooth and the right guide tooth are divided at the two ends of static blade tooth, so that the two end ports of static tooth slot extend to the outside of left side plate and right side plate respectively and communicate with the outside.The beneficial effects of the present application are that by controlling the distance L1 between the left side plate and the right side plate to be less than the width L2 of the panel, the upper ends of the left side plate and the right side plate form the left support and the right support, the local thickness of the two side edges of the panel is increased, the thickness of the panel material is reduced, the material cost is reduced, the support rigidity of the panel is ensured, the deformation of the panel when bearing the skin extrusion is prevented, the cooperation accuracy of the moving blade and the shaving blade is ensured, and the hair trimming performance of the shaving blade is improved.

Description

Technical Field

[0001] This invention relates to a blade for trimming hair, and more specifically to a shaving blade and blade assembly and trimming tool, primarily used for trimming hair such as beards. Background Technology

[0002] There are two main types of blade assemblies used in reciprocating shavers or hair removal devices: one is the curved n-shaped blade assembly (commonly known in the industry as the U-shaped blade), and the other is the flat n-shaped blade assembly (commonly known in the industry as the intermediate blade). In the curved n-shaped blade assembly, the stationary blade is made of a flexible thin sheet, with a thickness typically less than 0.05mm. The thinner the stationary blade, the smaller the distance between the cutting surface where the moving and stationary blades meet and the skin surface. After the hair, such as beard hair, is cut by the moving blade within the stationary blade, the length of the stubble or hair root remaining on the skin surface is shorter, resulting in a better trimming effect.

[0003] Although the stationary blade of the curved n-shaped blade assembly is thinner and has a better hair trimming effect, the stationary blade is made of a flexible thin sheet and does not have supporting rigidity. It is prone to deformation when in contact with the skin, which not only affects the hair cutting efficiency, but also increases the frictional resistance between the stationary blade and the moving blade, resulting in a rise in surface temperature of both the stationary blade and the moving blade.

[0004] The planar n-shaped blade assembly has a stationary blade made of sheet material through bending or stamping processes. The sheet material is thicker than the flexible sheet material. Although the sheet material itself has a certain supporting rigidity, the increased material thickness also increases the distance between the cutting working surface of the stationary blade and the moving blade and the skin surface, resulting in a reduction in the hair-feeding efficiency and trimming effect of the stationary blade. Summary of the Invention

[0005] Based on the above-mentioned technical deficiencies, the present invention provides a shaving blade and a blade head assembly and a trimming tool. By improving the structure of the existing shaving blade, the shaving blade not only has supporting rigidity to avoid deformation under stress and improve working stability, but also improves the hair entry efficiency and hair trimming effect of the shaving blade.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is a shaving blade, including a panel that contacts the skin, and a left side plate and a right side plate supported on both sides of the panel; the first gap L1 between the left side plate and the right side plate is smaller than the panel width L2, so that the left side plate and the right side plate are respectively formed with an outwardly extending left support member and a right support member at the end connected to the panel.

[0007] Viewed from the orthographic projection direction of the outer surface of the panel, several spaced-apart stationary toothed grooves penetrate at least the panel, the left support member, and the right support member, forming stationary cutter teeth between adjacent stationary toothed grooves in the panel. The left and right guide teeth are formed by combining with the two sides of the panel and the left and right support members respectively. The left and right guide teeth are located at the two ends of the stationary cutter teeth, so that the two ends of the stationary toothed grooves extend to the outside of the left and right side plates and communicate with the outside.

[0008] Optionally, when viewed from either end of the shaving blade via orthographic projection, gaps X1 are formed between the left and right support members and the panel, making both the left and right guide teeth hollow.

[0009] Optionally, when viewed from the orthographic projection direction of either end of the razor blade, one of the left or right support members forms a gap X1 with the panel, making its corresponding guide teeth hollow; the other is in contact with the panel, making its corresponding guide teeth solid.

[0010] Optionally, the gap X1 is less than 0.5mm.

[0011] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, the thickness T1 of the left guide tooth and the thickness T2 of the right guide tooth are set to be the same or different.

[0012] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, with the outer surfaces of the left and right plates as a reference, the lengths of the left guide teeth L5 and the right guide teeth L6 can be set to be the same or different.

[0013] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, the left guide tooth and / or the right guide tooth are provided with a first clearance groove for removing local material.

[0014] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, the first clearance groove is convex arc-shaped, so that the corresponding left guide tooth and / or right guide tooth forms a first concave arc surface at least partially on the outer surface and bottom end face, and the highest point of the first concave arc surface does not exceed half the thickness of the corresponding guide tooth.

[0015] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, the left guide tooth and / or the right guide tooth are provided with a second clearance groove for removing local material.

[0016] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, the second clearance groove is convex arc-shaped, so that a second concave arc surface is formed in the local outer surface and bottom end surface of the corresponding left guide tooth and / or right guide tooth.

[0017] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, the first and second clearance grooves formed in the left and / or right guide teeth are misaligned, so that at least a partial outer surface and a second concave arc surface with undulating contours are formed in the corresponding left and / or right guide teeth.

[0018] Optionally, when viewed from the orthographic projection direction of either end of the shaving blade, the upper and lower end faces of the left guide tooth and / or the right guide tooth are respectively provided with a third relief groove and a fourth relief groove for removing local material, thereby reducing the tooth tip thickness of the left guide tooth and / or the right guide tooth.

[0019] Optionally, the thicknesses T3 and T4 of the left support member are different from the thicknesses T5, T6, and T7 of the panel, the left side plate, and the right side plate; and the thicknesses T3 and T4 of the left support member are less than the thicknesses T5, T6, and T7 of the panel, the left side plate, and the right side plate.

[0020] Optionally, the thickness of the two side edges of the panel is less than the thickness of the middle, so that the two side edges of the panel form sloping surfaces, and the foot of the sloping surfaces is smoothly connected to the left support and the right support.

[0021] Optionally, the ends of the left and right plates that are connected to the left and right support members respectively have inwardly tapered slopes, and the high ends of the inwardly tapered slopes are smoothly connected to the left and right support members.

[0022] Optionally, a first rib is formed at both ends of the panel along its length. The first rib protrudes along the outer or inner surface of the panel, such that the thickness T8 at both ends of the panel is greater than the thickness T9 in the middle.

[0023] Optionally, a second rib is formed at both ends of the left and right side plates along their length. The second rib protrudes along the outer or inner surface of the left and right side plates, such that the thickness at both ends of the left and right side plates is greater than the thickness at the middle.

[0024] Optionally, a third rib is formed at both ends of the panel along its length. The third rib protrudes along the outer surface of the panel, and a fourth rib is provided at the middle of the panel to connect the two third ribs, thus dividing the stationary tooth groove in the panel into two independent and non-communicating parts.

[0025] Optionally, when viewed from the orthographic projection direction of the outer surface of the panel, the tooth tip width L3 of the left guide tooth and / or right guide tooth is less than the tooth root width L4, so that the stationary tooth groove port between adjacent left guide teeth and / or right guide teeth is flared.

[0026] Based on the aforementioned shaving blades, this application proposes a blade head assembly, which includes the aforementioned shaving blades.

[0027] Based on the aforementioned blade assembly, this application also proposes a technical solution for a trimming tool, which includes the aforementioned blade assembly.

[0028] The beneficial effects of this invention are:

[0029] 1. By controlling the distance L1 between the left and right panels to be less than the panel width L2, the upper ends of the left and right panels will form left and right support members respectively. This is equivalent to increasing the local thickness of the two sides of the panel. This can ensure the support rigidity of the panel while reducing the panel material thickness and material cost, preventing the panel from deforming when it comes into contact with the skin and is subjected to skin pressure. This improves the working stability of the shaving blades, ensures the matching accuracy between the moving blade and the shaving blades, and improves the hair trimming performance of the shaving blades.

[0030] 2. The existing shaving blades are generally thicker than 1mm. After the above structural improvements, the shaving blades can be made of metal sheets with a minimum thickness of 0.08mm to 0.15mm. This reduces the material cost of the shaving blades without reducing their working strength or the precision of the fit between the shaving blades and the moving blades, thus improving the hair trimming performance of the shaving blades. Attached Figure Description

[0031] Figure 1 This is a first embodiment of the razor blade assembly of the present invention, showing an assembly structure diagram of the first embodiment of the razor blade.

[0032] Figure 2 This is a perspective structural diagram of the first embodiment of the shaving blade of the present invention.

[0033] Figure 3 This is a planar structural diagram of the first embodiment of the shaving blade of the present invention.

[0034] Figure 4 This is a plan view of the second embodiment of the first embodiment of the shaving blades of the present invention.

[0035] Figure 5 This is a plan view of the third embodiment of the first embodiment of the shaving blades of the present invention.

[0036] Figure 6 This is a plan view of the fourth embodiment of the first embodiment of the shaving blades of the present invention.

[0037] Figure 7 This is a second embodiment of the razor blade assembly of the present invention, showing an assembly structure diagram of the second embodiment of the razor blade.

[0038] Figure 8 This is a perspective structural diagram of the second embodiment of the shaving blade of the present invention.

[0039] Figure 9This is a planar structural diagram of the end face of the second embodiment of the shaving blade of the present invention.

[0040] Figure 10 This is a third embodiment of the razor blade assembly of the present invention, showing an assembly structure diagram of the third embodiment of the razor blade.

[0041] Figure 11 This is a perspective structural diagram of the third embodiment of the shaving blade of the present invention.

[0042] Figure 12 This is a planar structural diagram of the end face of the third embodiment of the shaving blade of the present invention.

[0043] Figure 13 This is a fourth embodiment of the razor blade assembly of the present invention, showing an assembly structure diagram of the fourth embodiment of the razor blade.

[0044] Figure 14 This is a perspective structural diagram of the fourth embodiment of the shaving blade of the present invention.

[0045] Figure 15 This is a planar structural diagram of the end face of the fourth embodiment of the shaving blade of the present invention.

[0046] Figure 16 This is a fifth embodiment of the razor blade assembly of the present invention, showing an assembly structure diagram of the fifth embodiment of the razor blade.

[0047] Figure 17 This is a three-dimensional structural diagram of the fifth embodiment of the shaving blade of the present invention.

[0048] Figure 18 This is a plan view of the fifth embodiment of the shaving blade of the present invention.

[0049] Figure 19 This is a sixth embodiment of the razor blade assembly of the present invention, showing an assembly structure diagram of the sixth embodiment of the razor blade.

[0050] Figure 20 This is a perspective structural diagram of the sixth embodiment of the shaving blade of the present invention.

[0051] Figure 21 This is a cross-sectional view of the sixth embodiment of the shaving blade of the present invention.

[0052] Figure 22 This is a seventh embodiment of the razor blade assembly of the present invention, showing an assembly structure diagram of the seventh embodiment of the razor blade.

[0053] Figure 23 This is a three-dimensional structural diagram of the seventh embodiment of the shaving blade of the present invention.

[0054] Figure 24 This is a three-dimensional half-sectional view of the seventh embodiment of the shaving blade of the present invention.

[0055] Figure 25 This is a cross-sectional view of the end face of the seventh embodiment of the shaving blade of the present invention. Detailed Implementation

[0056] To make the technical objectives, technical solutions, and technical effects of the present invention clearer, the following will be described in conjunction with the appendix. Figures 1-25 The specific embodiments of the present invention will be described in further detail below:

[0057] This invention relates to a shaving blade, comprising a panel 1 that contacts the skin. During shaving, the panel 1 slides along the skin surface to guide the hair to be trimmed, such as beard hair. To facilitate the assembly of the shaving blade, a left side plate 2 and a right side plate 3 are supported on both sides of the panel 1. During assembly, the left side plate 2 and the right side plate 3 are connected to a stationary blade holder to fix the shaving blade on the stationary blade holder.

[0058] To balance the supporting rigidity, hair-feeding efficiency, trimming effect, and reduce material costs of the shaving blades, the first gap L1 between the left side plate 2 and the right side plate 3 is smaller than the panel width L2, so that the ends of the left side plate 2 and the right side plate 3 connected to the panel 1 respectively form outwardly extending left support 5 and right support 6. By controlling the first gap L1 between the left side plate 2 and the right side plate 3 to be smaller than the panel width L2, the upper ends of the left side plate 2 and the right side plate 3 respectively form left support 5 and right support 6, which is equivalent to increasing the local thickness of the two sides of the panel 1. This can ensure the supporting rigidity of the panel 1 while reducing the material thickness and material costs, prevent the panel 1 from deforming when in contact with the skin and subjected to skin pressure, improve the working stability of the shaving blades, ensure the matching accuracy between the moving blade and the shaving blades, and improve the hair trimming performance of the shaving blades.

[0059] It is important to emphasize that when the first gap L1 between the left side plate 2 and the right side plate 3 is less than the panel width L2, the left side plate 2 and the right side plate 3 are equivalent to narrowing towards the inside of the panel 1 along both sides of the panel 1. When the hair to be trimmed, such as beard hair, is relatively long (e.g., greater than 5mm) and touches the edge of the panel 1, the inward-sloping left side plate 2 and right side plate 3 will not block the hair to be trimmed, making it easier for the hair to slide into the panel 1 from both sides of the panel 1, thus improving the hair entry efficiency of the shaving blades. Especially when facing long beard hair to be trimmed, the hair entry efficiency is higher than that of the non-inward-sloping left side plate 2 and right side plate 3.

[0060] As the left side plate 2 and the right side plate 3 narrow towards the inside of the panel 1, the left side plate 2 and the right side plate 3, along with the end closest to the panel 1, form a left support member 5 and a right support member 6, respectively, located below the panel 1. To avoid the left support member 5 and the right support member 6 interfering with the hair guide of the panel 1 and affecting the hair-feeding efficiency of the shaving blades, viewed from the orthographic projection direction of the outer surface of the panel 1, several spaced stationary tooth grooves 11 penetrate at least the panel 1, the left support member 5, and the right support member 6, forming stationary blade teeth 12 between adjacent stationary tooth grooves 11 in the panel 1. These, along with the two side edges of the panel 1 and the left support member 5 and the right support member 6, respectively, form left guide teeth 7 and right guide teeth 8. The left guide teeth 7 and right guide teeth 8 are located at both ends of the stationary blade teeth 12, allowing the two ends of the stationary tooth grooves 11 to extend to the outside of the left side plate 2 and the right side plate 3, respectively, and communicate with the outside.

[0061] With the stationary tooth groove 11 penetrating the panel 1, the left support 5, and the right support 6, and the left side plate 2 and the right side plate 3 narrowing inwards towards the panel 1, the two side edges of the panel 1 can form the left guide tooth 7 and the right guide tooth 8 with the left support 5 and the right support 6, respectively. From a usage perspective, when the left guide tooth 7 and the right guide tooth 8 formed on the two side edges of the panel 1 are in contact with the skin, the left guide tooth 7 or the right guide tooth 8 can quickly separate the hair to be trimmed, such as beard hair, and guide the hair to be trimmed into the stationary tooth groove 11, thereby improving the hair entry efficiency of the shaving blades.

[0062] It is important to emphasize that the material thickness of existing shaving blades is generally greater than 1mm. After the above structural improvement, the shaving blades can be made of metal sheets with a minimum thickness of 0.08mm to 0.15mm. This reduces the material cost of the shaving blades without reducing their working strength or the precision of the fit between the shaving blades and the moving blades, thus improving the hair trimming performance of the shaving blades.

[0063] Based on the overall concept of balancing the supporting rigidity of the razor blades, hair-feeding efficiency, trimming effect, and reducing material costs, this application proposes the following specific embodiments with different structures:

[0064] Example 1

[0065] like Figures 1-6 As shown, when the left support member 5 and the right support member 6 are combined with the two side edges of the panel 1 to form the left guide tooth 7 and the right guide tooth 8, different structures can be formed through the following different implementation methods, which have different functions and produce different technical effects:

[0066] Implementation Method (I) :like Figure 3As shown, viewed from either end of the shaving blades via orthographic projection, gaps X1 are formed between the left support 5 and the right support 6 and the panel 1, respectively, making the left guide teeth 7 and the right guide teeth 8 hollow. By controlling the gaps X1 between the left support 5 and the right support 6 and the two edges of the panel 1, when hair such as beard hair extends between the left support 5 and the right support 6 and the panel 1, it can prevent the hair from getting stuck between the left support 5 and the right support 6 and the panel 1, avoiding hair pulling and improving user comfort and experience.

[0067] Unlike the aforementioned method where a gap X1 is formed between the left support member 5 and the right support member 6 and the panel 1, the left support member 5 and the right support member 6 can also be directly attached to the panel 1 (which can be considered as a gap X1 being zero), making both the left guide tooth 7 and the right guide tooth 8 solid. This embodiment is not shown in the accompanying drawings, but can be found in the attached drawings for details. Figure 4 The upper right side structure. The left guide tooth 7 and the right guide tooth 8 are made of solid structure. Although this can improve the support strength of the left support member 5 and the right support member 6 on the two sides of the panel 1, the hair to be trimmed, such as beard hair, usually has a certain length. When it is inserted into the stationary tooth groove 11 in the panel 1, there is a possibility that it will get stuck between the left support member 5 or the right support member 6 and the panel 1, which can easily cause pulling pain on the user's skin and make the user uncomfortable.

[0068] It is particularly important to note that regardless of whether the gap X1 between the left guide tooth 7 and the right guide tooth 8 is zero or greater than zero, when the end faces of the left guide tooth 7 and the right guide tooth 8 contact the skin and slide along the skin surface, they can both shave hair, such as beards, which are close to the skin surface, thus improving the hair entry efficiency and trimming effect of the shaving blades and preventing missed trimming.

[0069] Incidentally, when the left support member 5 and the right support member 6 form a gap X1 with the panel 1, and the gap X1 is greater than zero, the left support member 5 and the right support member 6 can be parallel or inclined with the panel 1. If the left support member 5 and the right support member 6 are formed by bending, there is a bending springback phenomenon. For production efficiency considerations, the left support member 5 and the right support member 6 preferably form an inclined angle α with the panel 1. If the left support member 5 and the right support member 6 are formed by stamping and folding, so that the left support member 5 and the right support member 6 form an end face fit with the panel 1, and the gap X1 is zero, the left support member 5 and the right support member 6 are parallel to the panel 1.

[0070] Implementation Method (II) :like Figure 4As shown, viewed from either end of the razor blade via orthographic projection, one of the left support member 5 or the right support member 6 (i.e., the left support member 5 or the right support member 6) forms a gap X1 with the panel 1, making its corresponding guide tooth hollow; the other is in contact with the panel 1, making its corresponding guide tooth solid. In specific implementation, when the left support member 5 forms a gap X1 with the panel 1, and the gap X1 is greater than zero, the left guide tooth 7 is hollow. When the right support member 6 is in contact with the panel 1 (i.e., the gap X1 is zero), the right guide tooth 8 is solid. Conversely, when the left guide tooth 7 is in contact with the panel 1 (i.e., the gap X1 is zero), the left guide tooth 7 is solid; and when the right guide tooth 8 forms a gap X1 with the panel 1, and the gap X1 is greater than zero, the right guide tooth 8 is hollow.

[0071] The hybrid configuration allows for the pre-trimming of longer hairs, such as beard hair, using the hollow guide teeth (either the left guide tooth 7 or the right guide tooth 8). Because these hairs are often long, they can easily get caught or pulled between the panel 1 and the left or right support member 5. Therefore, using the hollow guide teeth (either the left guide tooth 7 or the right guide tooth 8) to pre-trim the relatively longer hairs avoids this problem, ensuring a smooth and comfortable hair trimming process.

[0072] Then, the solid guide teeth (if the hollow guide teeth are the left guide teeth 7, then the solid guide teeth are the right guide teeth 8) are pressed against the skin. After the hair to be trimmed is shortened by the hollow guide teeth, the short hairs will not get stuck in the contact surface of the solid guide teeth due to their length, avoiding problems such as hair getting stuck or pulled. Secondly, because the solid guide teeth have stronger support rigidity, one side of the solid guide teeth can be used to squeeze the skin, exposing the roots of the trimmed hairs to the skin surface as much as possible. This allows the scissors to get closer to the roots of the hairs for trimming, shortening the length of stubble or hair roots remaining on the skin surface and improving the trimming effect of the scissor blades.

[0073] When the left guide tooth 7 and / or the right guide tooth 8 are hollow, the gap X1 between the left support member 5 and / or the right support member 6 and the panel 1 is less than 0.5mm. Since the diameter of human hair varies depending on the body part, but the average diameter of human hair is between 0.1mm and 0.2mm, the gap X1 is preferably in the range of 0.2mm to 0.5mm, larger than the diameter of human hair. This avoids problems such as hair getting stuck or pulled between the left guide tooth 7 and the right guide tooth 8, improving the smoothness of hair trimming and user comfort. If the gap X1 is set larger, such as 1mm, 2mm, or 5mm, the panel 1 is prone to bending and deformation under skin pressure, affecting the fitting accuracy and trimming performance of the moving blade and the shaving blade. Therefore, setting the gap X1 between 0.2mm and 0.5mm is the preferred embodiment.

[0074] Implementation Method (III) Viewed from either end of the shaving blade via orthographic projection, the thickness T1 of the left guide tooth 7 and the thickness T2 of the right guide tooth 8 may be the same or different. When the thickness T1 of the left guide tooth 7 and the thickness T2 of the right guide tooth 8 are the same, such as... Figure 3 As shown, during the production process, the left guide tooth 7 and the right guide tooth 8 can be integrally formed using the same processing technology, such as bending or stamping, reducing processing steps and lowering the labor production cost of the shaving blades.

[0075] When the thickness T1 of the left guide tooth 7 and the thickness T2 of the right guide tooth 8 are different, such as Figure 4 As shown, the left guide tooth 7 is hollow and the right guide tooth 8 is solid, forming T1 (thick) and T2 (thin) of different thicknesses.

[0076] Or, such as Figure 5 As shown, the gap X1 between the left guide tooth 7 and the right guide tooth 8 is greater than zero. Furthermore, the gap X1 values ​​inside the left guide tooth 7 and the right guide tooth 8 are different, forming gap X1 (small) and gap X1 (large). Consequently, the thicknesses of the left guide tooth 7 and the right guide tooth 8 are T1 (thin) and T2 (thick).

[0077] In practice, regardless of whether the left guide tooth 7 and the right guide tooth 8 adopt a configuration structure of T1 (thin) and T2 (thick) or a configuration structure of T1 (thick) and T2 (thin), the left guide tooth 7 and the right guide tooth 8 will experience different pressures when they contact and squeeze the skin, resulting in different support rigidities.

[0078] The thinner the thickness, the smaller the bending deformation of the corresponding left guide tooth 7 or right guide tooth 8 when the panel 1 is subjected to skin pressure, and the higher the support rigidity, which can greatly improve the matching accuracy between the moving blade and the panel 1 and ensure the hair trimming performance.

[0079] Conversely, the thicker the thickness, the greater the bending deformation of the corresponding left guide tooth 7 or right guide tooth 8 when the panel 1 is subjected to skin pressure. Although the support rigidity is reduced, the contact area is correspondingly larger when the end face of the corresponding left guide tooth 7 or right guide tooth 8 contacts the skin. The smoothness of the left guide tooth 7 or right guide tooth 8 sliding along the skin is higher, the skin feel is more comfortable, and the user experience can be greatly improved.

[0080] Implementation Method (IV) Viewed from either end of the shaving blade via orthographic projection, with the outer surfaces of the left side plate 2 and the right side plate 3 as references, the length L5 of the left guide tooth 7 and the length L6 of the right guide tooth 8 may be the same or different. For example... Figures 3-5 As shown, when the left guide tooth 7 and the right guide tooth 8 are set to the same length, the hair-feeding efficiency and trimming efficiency of the shaving blades are the same during use, regardless of which side of the panel 1 contacts the skin. Therefore, when using this type of shaving blade in a multi-blade shaving device, the installation position does not need to be considered; it can be installed in the middle or on both sides to ensure hair-feeding efficiency, trimming efficiency, and trimming performance.

[0081] But if Figure 6 As shown, the lengths of the left guide tooth 7 and the right guide tooth 8 can also be combined in different ways, such as a combination of left guide tooth 7 length L5 (long) and right guide tooth 8 length L6 (short); or a combination of left guide tooth 7 length L5 (short) and right guide tooth 8 length (long) not shown in the attached diagram. With this structure, there will be some differences in the hair-feeding efficiency and trimming efficiency of the left guide tooth 7 and the right guide tooth 8, especially when dealing with longer hair such as beards. Because the hair is relatively long, it is easily affected by external factors such as static electricity and sebum secreted by the skin, and will basically be in a curly shape. When the relatively shorter left guide tooth 7 or right guide tooth 8 contacts the skin, the curly part of the hair to be trimmed will first contact the left side plate 2 or the right side plate 3 before sliding into the port of the stationary tooth groove 11, which will prevent the hair to be trimmed from smoothly entering the stationary tooth groove 11, thereby reducing the hair-feeding efficiency of the shaving blades. However, when cutting relatively short hairs such as beards, the distance that the static tooth groove 11 slides into the panel 1 is shorter, allowing it to be cut by the blade more quickly, resulting in higher trimming efficiency.

[0082] Secondly, when the length of the left guide tooth 7 or the right guide tooth 8 is relatively short, when facing areas with large changes in skin contour, such as the chin, the shorter length means that the distance between the inward-curving edges of the left side plate 2 or the right side plate 3 and the two sides of the panel 1 is small. When the left guide tooth 7 or the right guide tooth 8 slides along the concave chin, the protruding chin contour will obstruct the body of the trimmer (not shown in the figure), which will limit the hair entry angle of the stationary tooth groove 11 in the shaving blade, affecting the hair entry efficiency and trimming efficiency of the shaving blade.

[0083] Conversely, when the relatively long left guide tooth 7 or right guide tooth 8 contacts the skin, it means that the inward distance between the left side plate 2 or right side plate 3 and the two sides of the panel 1 is large. When the left guide tooth 7 or right guide tooth 8 slides along the concave chin, the protruding chin contour provides less obstruction to the trimmer's body. The hair-feeding angle of the stationary tooth groove 11 in the shaving blade can be flexibly adjusted, effectively improving the hair-feeding efficiency and trimming efficiency of the shaving blade. Furthermore, due to the large inward distance between the left side plate 2 and right side plate 3, long, curly beard hairs are less likely to be blocked by the left side plate 2 or right side plate 3, further improving the hair-feeding efficiency of the shaving blade.

[0084] Example 2

[0085] In line with the overall concept of balancing the supporting rigidity of the shaving blades, hair-feathering efficiency, trimming effect, and reducing material costs, this application also proposes another embodiment to improve the hair-shaving and / or shaving effect of the shaving blades:

[0086] like Figures 7-9 As shown, viewed from either end of the shaving blade via orthographic projection, the left guide tooth 7 and / or the right guide tooth 8 are provided with a first clearance groove 91 for removing localized material. By providing the first clearance groove 91 in the left guide tooth 7 and / or the right guide tooth 8, and using the first clearance groove 91 to remove localized material from the left guide tooth 7 and / or the right guide tooth 8, the left guide tooth 7 and / or the right guide tooth 8 become locally concave. During use, some hairs such as beard hairs are restricted by the stickiness of sebum secreted by the skin and adhere tightly to the skin surface. When the left guide tooth 7 or the right guide tooth 8 cannot scrape up the hairs adhering to the skin surface when moving forward, it can change its direction of movement and pull the shaving blade backward. The concave edge of the first clearance groove 91 is used to scrape along the skin surface, thereby scraping up the hairs such as beard hairs adhering to the skin surface, avoiding missed cuts and ensuring the trimming effect of the shaving blade.

[0087] like Figure 9As shown, in the specific production process, to facilitate the production and processing of the first relief groove 91, when viewed from the orthographic projection direction of either end of the shaving blade, the first relief groove 91 is convex arc-shaped, so that the corresponding left guide tooth 7 and / or right guide tooth 8 form a first concave arc surface 92 in at least a partial outer surface and bottom end surface. By setting the first relief groove 91 to be convex arc-shaped, after removing some material from the left guide tooth 7 and / or right guide tooth 8, the first concave arc surface 92 can be formed in the left guide tooth 7 and / or right guide tooth 8. During production, the left guide tooth 7 and / or right guide tooth 8 can be moved along the cutting wheel axis to remove some material from the left guide tooth 7 and / or right guide tooth 8 to form the first concave arc surface 92, thereby facilitating the processing and forming of the first relief groove 91 and improving the production efficiency of the shaving blade. Of course, the first relief groove 91 can also be formed by other processes, such as stamping, electrical pulse, etc. However, the stamping process requires punching the first relief groove 91 out of the sheet surface first, and then bending the sheet, which results in a deviation in the position of the first relief groove 91.

[0088] To ensure skin comfort when the shaving blades move forward along the skin to shave, and to ensure that the shaving blades also have a shaving function when moving backward, the highest point of the first concave arc surface 92 does not exceed half the thickness of the corresponding guide tooth. The corresponding guide tooth refers to the situation where, when the first clearance groove 91 is provided on the left guide tooth 7, the highest point of the first concave arc surface 92 does not exceed half the thickness T1 of the left guide tooth 7. Similarly, if the first clearance groove 91 is provided on the right guide tooth 8, the highest point of the first concave arc surface 92 does not exceed half the thickness T2 of the right guide tooth 8. If the first clearance groove 91 is provided in both the left guide tooth 7 and the right guide tooth 8, the highest point of the first concave arc surface 92 does not exceed half the thickness of either the left or right guide tooth 8. In specific implementations, the first clearance groove 91 is located near the bottom end face of the left guide tooth 7 and / or the right guide tooth 8.

[0089] By controlling the highest point of the first concave arc surface 92 to not exceed half the thickness of the corresponding guide tooth (left guide tooth 7 and / or right guide tooth 8), when the end face of the left guide tooth 7 and / or right guide tooth 8 contacts the skin and slides forward, the arc-shaped end face slides along the skin with better feel and higher smoothness. When the left guide tooth 7 and / or right guide tooth 8 moves backward, the edge of the first concave arc surface 92, located below the center line of the left guide tooth 7 and / or right guide tooth 8, can scrape along the skin but will not embed too deeply into the skin, ensuring that hair can be scraped while avoiding skin scratches, thus improving the comfort and safety of using the shaving blades.

[0090] Incidentally, since the trimmer has two structures, a single-blade assembly and a multi-blade assembly, in this embodiment, the highest point of the first concave arc surface 92 does not exceed half the thickness of the left guide tooth 7 and / or the right guide tooth 8. This is mainly to take into account the use of the trimmer with a single-blade assembly, where both sides of the shaving blades can individually contact the skin and move forward along the skin to scrape the hair close to the skin surface, or move backward to scrape the hair close to the skin surface.

[0091] Example 3

[0092] When shaving blades are used in trimmers with multi-blade assemblies, especially when the shaving blades are in the middle of a blade assembly installed side by side, the distance between adjacent blade assemblies limits the use of trimmers with multi-blade assemblies. As described in Embodiment 2, the highest point of the first concave arc surface 92 does not exceed half the thickness of the left guide tooth 7 and / or the right guide tooth 8.

[0093] In order to meet the needs of shaving or trimming when using multi-blade trimming tools, this application also proposes another embodiment:

[0094] like Figures 10-12 As shown, viewed from the orthographic projection direction of either end of the shaving blade, the left guide tooth 7 and / or the right guide tooth 8 are provided with a second clearance groove 93 for removing localized material. The second clearance groove 93 is formed on the outer surface of the left guide tooth 7 and / or the right guide tooth 8 and extends at least half the thickness of the left guide tooth 7 and / or the right guide tooth 8. After the second clearance groove 93 removes localized material, a second concave arc surface 94 is formed on the left guide tooth 7 and / or the right guide tooth 8. The edge of the second concave arc surface 94 is close to the surface of the panel 1, reducing the limitation of the spacing distance when the multi-blade assembly is installed side by side. This allows the left guide tooth 7 and / or the right guide tooth 8 to not only scrape the hair on the skin surface when moving forward, but also, during the backward movement of the shaving blade, to contact the skin with the edge of the second concave arc surface 94 and scrape the hair close to the skin, preventing missed cuts.

[0095] To facilitate the manufacturing of the second relief groove 93, when viewed from the orthographic projection direction of either end of the shaving blade, the second relief groove 93 is convex arc-shaped, forming a second concave arc surface 94 on the partial outer surface and bottom end surface of the corresponding left guide tooth 7 and / or right guide tooth 8. The manufacturing method of the second relief groove 93 is the same as that of the first relief groove 91 in the above embodiment, and will not be repeated here.

[0096] Because the multiple blade components in a multi-blade trimmer are installed side-by-side with relatively small spacing, the hair entry of the blade component in the middle position can be affected. To reduce this effect, the first clearance groove 91 and the second clearance groove 93 formed in the left guide tooth 7 and / or the right guide tooth 8 are staggered when viewed from the orthographic projection direction of either end of the shaving blade. This causes the corresponding left guide tooth 7 and / or right guide tooth 8 to form a first concave arc surface 92 and a second concave arc surface 94 with undulating contours on at least a partial outer surface and bottom surface. By staggering the first clearance groove 91 and the second clearance groove 93 in the left guide tooth 7 and / or the right guide tooth 8, the spacing space between adjacent blade components is relatively increased. When the hair to be trimmed, such as beard hair, extends between adjacent blade components, the obstruction to the hair is reduced, allowing the hair to slide more smoothly into the stationary tooth groove 11. This improves the hair entry efficiency of the shaving blade in the multi-blade assembly, especially the shaving blade in the middle installation position.

[0097] Example 4

[0098] Based on the overall concept of balancing the supporting rigidity of the shaving blades, hair-feathering efficiency, trimming effect, and reducing material costs, this application also proposes another embodiment:

[0099] like Figures 13-15 As shown, viewed from the orthographic projection direction of either end of the razor blade, the upper and lower end faces of the left guide tooth 7 and / or the right guide tooth 8 are respectively provided with a third relief groove 95 and a fourth relief groove 96 for removing local material, thereby reducing the tooth tip thickness of the left guide tooth 7 and / or the right guide tooth 8 (which can also be understood as thinning the tooth tip thickness). In this embodiment, the third relief groove 95 and the fourth relief groove 96 are used to remove local material from the outer surface and bottom end face of the left guide tooth 7 and / or the right guide tooth 8, which is equivalent to the outer surface and bottom end face of the left guide tooth 7 and / or the right guide tooth 8 being recessed inward, thus thinning the tooth tip thickness of the left guide tooth 7 and / or the right guide tooth 8.

[0100] When the left guide tooth 7 or the right guide tooth 8 contacts and slides against the skin, the skin will successively slide into the third clearance groove 95 or the fourth clearance groove 96 and slide out from the third clearance groove 95 or the fourth clearance groove 96. The material removed by the third clearance groove 95 and the fourth clearance groove 96 reduces the distance between the skin surface and the port of the stationary tooth groove 11 between the adjacent left guide tooth 7 and / or right guide tooth 8. The hair to be cut is closer to the port of the stationary tooth groove 11, and the hair to be cut can be guided into the stationary tooth groove 11 more quickly, improving the hair feeding efficiency of the shaving blade.

[0101] In actual production, such as Figure 15As shown, the third clearance groove 95 and the fourth clearance groove 96 are formed by removing local material along the outer surface and bottom end face of the left guide tooth 7 and / or right guide tooth 8 by a cutting abrasive wheel, creating concave arc surfaces in the local outer surface and bottom end face of the left guide tooth 7 and / or right guide tooth 8. When the panel 1 slides along the skin surface, part of the skin sinks into the concave arc surface of the outer surface of the left guide tooth 7 and / or right guide tooth 8, and the two ends of the concave arc surface push against the skin outside the concave arc surface, thus achieving a scraping and shaving effect, preventing missed cuts and ensuring the trimming effect of the shaving blades.

[0102] Furthermore, when a fourth clearance groove 96 is provided on the bottom end face of the left guide tooth 7 and / or the right guide tooth 8 to remove local material, the solid area of ​​the bottom end face of the left guide tooth 7 and / or the right guide tooth 8 is relatively reduced, increasing the space on the bottom end face of the left guide tooth 7 and the right guide tooth 8 on both sides of the shaving blade. When the left guide tooth 7 or the right guide tooth 8 contacts the skin, it can effectively reduce the obstruction of the hair such as beard to be cut on both sides of the shaving blade, so that the hair such as beard to be cut can slide into the stationary tooth groove 11 between the adjacent left guide tooth 7 and / or right guide tooth 8 more quickly, improving the hair entry efficiency of the shaving blade.

[0103] It should be noted that when a fourth clearance groove 96 is provided on the bottom end face of the left guide tooth 7 and / or the right guide tooth 8 to remove local material and form an inward arc surface, the outer end point of the inward arc surface formed by the fourth clearance groove 96 can be used to scrape along the skin surface to scrape up soft hairs such as beards that are stuck to the skin surface due to the stickiness of oil, thus preventing missed trimming and ensuring the hair trimming effect of the shaving blades.

[0104] Example 5

[0105] Based on the overall concept of balancing the supporting rigidity of the shaving blades, hair-feathering efficiency, trimming effect, and reducing material costs, this application also proposes another embodiment:

[0106] like Figures 16-18 As shown, the thickness T3 of the left support member 5 and the thickness T4 of the right support member 6 are different from the thickness T5 of the panel 1, the thickness T6 of the left side plate 2, and the thickness T7 of the right side plate 3; furthermore, the thickness T3 of the left support member 5 and the thickness T4 of the right support member 6 are less than the thickness T5 of the panel 1, the thickness T6 of the left side plate 2, and the thickness T7 of the right side plate 3. By reducing the thickness T3 of the left support member 5 and the thickness T4 of the right support member 6 connecting the two sides of the panel 1 and the left side plate 2 and the right side plate 3, the contact area between the outer surfaces of the left guide teeth 7 and the right guide teeth 8 and the skin surface can also be reduced. This not only enables the left guide teeth 7 and the right guide teeth 8 to have the function of shaving and trimming when sliding along the skin surface, avoiding missed trimming, but also increases the space below the left guide teeth 7 and the right guide teeth 8 at the two edges of the shaving blades, reducing the obstruction of the two sides of the shaving blades to the hair such as beards, and improving the hair entry efficiency of the shaving blades.

[0107] Furthermore, when the thickness T3 of the left support 5 and the thickness T4 of the right support 6 are reduced, the bending springback of the left guide tooth 7 and the right guide tooth 8 can be reduced during the bending process, thereby improving the bending efficiency, reducing secondary processing, and lowering production costs.

[0108] To maximize the shaving or scraping effect of the left guide teeth 7 and right guide teeth 8, the thickness of the two side edges of the panel 1 is less than the thickness of the middle edge, forming inclined slopes 14 on both side edges of the panel 1. The slopes 14 are smoothly connected to the left support 5 and the right support 6. By setting inclined slopes 14 on both side edges of the panel 1, and by using the slopes 14 to smoothly connect with the left support 5 and the right support 6, the contact area between the outer surfaces of the left guide teeth 7 and right guide teeth 8 and the skin surface can be further reduced, maximizing the shaving or scraping effect of the left guide teeth 7 and right guide teeth 8 and avoiding missed cuts. At the same time, the inclined slopes 14 also improve the smoothness of the panel 1 when it fits and slides along the skin, improving the user's skin feel.

[0109] To minimize obstruction of the left and right side plates 2 and 3 to the hair to be trimmed, inward-curving slopes 21 are formed at the ends of the left and right side plates 2 and 3 that connect to the left and right support members 5 and 6, respectively. The higher ends of the inward-curving slopes 21 are smoothly connected to the left and right support members 5 and 6. By setting inward-curving slopes 21 at the ends of the left and right side plates 2 and 3 that connect to the left and right support members 5 and 6, and by utilizing the smooth connection of the higher ends of the inward-curving slopes 21 to the left and right support members 5 and 6, the space volume below the left guide teeth 7 and right guide teeth 8 is relatively increased. This reduces the obstruction of the outer surfaces of the shaving blades to the hair to be trimmed, allowing the hair, especially long, curly beard hair, to enter the stationary tooth grooves 11 between the left and right guide teeth 7 and 8 more quickly, thus improving the hair-feeding efficiency of the shaving blades.

[0110] In the specific implementation process, to facilitate the sliding of long, curly beard hairs from both sides of the shaving blades into the stationary tooth grooves 11 in the panel 1, the stationary tooth grooves 11 extend downwards from the outer surface of the panel 1 into the inward-facing slopes 21 of the left and right side plates 2 and 3, thus relatively increasing the depth of the stationary tooth grooves 11. When the left guide teeth 7 or right guide teeth 8 on both sides of the shaving blades contact the skin and slide along the skin, the long, curly beard hairs slide towards the center of the panel 1 through the stationary tooth grooves 11 between adjacent left guide teeth 7 or right guide teeth 8. Since stationary tooth grooves 11 are also formed in the inward-facing slopes 21 of the left and right side plates 2 and 3, when the long, curly beard hairs slide to the outer surface of the left or right side plate 2 or 3, they are not blocked by the inward-facing slopes 21 in the left or right side plate 2 or 3, effectively improving the hair entry efficiency and trimming performance of the shaving blades.

[0111] Example 6

[0112] Based on the overall concept of balancing the supporting rigidity of the shaving blades, hair-feathering efficiency, trimming effect, and reducing material costs, this application also proposes another embodiment:

[0113] like Figures 19-21 As shown, first ribs 97 are formed at both ends of the panel 1 along its length. These first ribs 97 protrude along the outer or inner surface of the panel 1, making the end thickness T8 of the panel 1 greater than the middle thickness T9. During production, the shaving blades are assembled by bridging the two ends of the panel 1 to the stationary blade holder, with the middle area of ​​the panel 1 suspended within the stationary blade holder. It is evident that the assembly of the panel 1 primarily relies on the support at its two end edges. By providing first ribs 97 at both ends of the panel 1, making the end thickness T8 at the two end edges greater than the middle thickness T9, the stress-bearing area at the two end edges of the panel 1 can be increased while maximizing control over the material cost of the shaving blades. This enhances the bending strength of the panel 1, thereby improving the assembly firmness and support rigidity of the shaving blades and ensuring the working stability of the stationary blade.

[0114] To achieve supporting rigidity during shaving blade assembly, second ribs 98 are formed at both ends of the left side plate 2 and the right side plate 3 along their length. These second ribs 98 protrude along the outer or inner surface of the left side plate 2 and the right side plate 3, making the edge thickness at both ends of the left side plate 2 and the right side plate 3 greater than the thickness at the center. By adding second ribs 98 at the edges of the left side plate 2 and the right side plate 3, and connecting the second ribs 98 sequentially with the first rib 97 in the panel 1, the overall bending strength of the edges of the shaving blades can be improved. This enhances the working strength and stability of the shaving blades without significantly increasing the material cost of the shaving blades.

[0115] Example 7

[0116] Based on the above-mentioned addition of a first rib 97 and a second rib 98 to both ends of panel 1, left side panel 2, and right side panel 3, this application also proposes another embodiment:

[0117] like Figures 22-25 As shown, a third rib 99 is formed at both ends of the panel 1 along its length. The third rib 99 protrudes along the outer surface of the panel 1, and a fourth rib 100 is provided at the middle of the panel 1 to connect the two third ribs 99, thus dividing the stationary tooth groove 11 in the panel 1 into two independent and non-communicating parts.

[0118] By setting third ribs 99 at both ends of panel 1, when the shaving blades are assembled and the two ends of panel 1 are bridged on the stationary blade seat, the overall bending strength of the shaving blades is effectively improved under the action of the third ribs 99, ensuring the firmness of the connection between the shaving blades and the stationary blade seat.

[0119] Secondly, a fourth rib 100 is provided along the center of panel 1, connecting the third ribs 99 at both ends of panel 1, and dividing each stationary tooth groove 11 in panel 1 in two. This not only improves the overall bending strength of panel 1, preventing panel 1 from bending and deforming when in contact with skin and subjected to skin pressure, but also ensures the matching accuracy between the moving blade and the trimming blade, and reduces working temperature rise. At the same time, since the fourth rib 100 divides the stationary tooth groove 11 in two, the length of the stationary tooth groove 11 on panel 1 is relatively shortened, which can correspondingly improve the working strength of the stationary blade teeth 12 in the middle of panel 1, prevent each stationary blade tooth 12 in panel 1 from twisting due to excessive length, and ensure the matching trimming performance between the moving blade teeth and the stationary blade teeth 12 in the moving blade; in addition, it can also reduce the sliding distance of the hair such as beard to be trimmed entering the stationary tooth groove 11, and improve the trimming efficiency of the shaving blade.

[0120] In actual implementation, the thickness T10 of the third rib is greater than the thickness T5 of panel 1, and the thickness T11 of the fourth rib 100 is equal to the thickness T10 of the third rib 100, and greater than the thickness T6 of the left side panel 2 and the thickness T7 of the right side panel 3. Furthermore, to improve the overall bending strength of the trimmer blade, fifth ribs 101 are provided at both ends of the left side panel 2 and the right side panel 3, respectively. The thickness T12 of the fifth rib 101 is the same as the thickness of the third rib 99 and is integrally connected to the third rib 99.

[0121] To improve the hair separation and feed efficiency of the left guide teeth 7 and right guide teeth 8, when viewed from the orthographic projection direction of the outer surface of the panel 1, the tooth tip width L3 of the left guide teeth 7 and / or right guide teeth 8 is smaller than the tooth root width L4, making the port of the stationary tooth groove 11 between adjacent left guide teeth 7 and / or right guide teeth 8 trumpet-shaped. By controlling the tooth tip width L3 of the left guide teeth 7 and right guide teeth 8 to be smaller than the tooth root width L4, it is equivalent to increasing the width of the port of the stationary tooth groove 11 at the tooth tip of the left guide teeth 7 or right guide teeth 8. When the port width of the stationary blade 12 increases, it can better separate the hair to be cut, such as beard hair, and make the hair to be cut slide more quickly along the stationary tooth groove 11 towards the center of the panel 1, thus improving the hair feed efficiency of the shaving blade.

[0122] Based on the aforementioned shaving blades, this application proposes a blade head assembly, which includes the aforementioned shaving blades.

[0123] Based on the aforementioned blade assembly, this application also proposes a technical solution for a trimming tool, which includes the aforementioned blade assembly.

[0124] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shaving blade, comprising a panel (1) in contact with the skin, and a left side plate (2) and a right side plate (3) supported on both sides of the panel (1); characterized in that: The first gap L1 between the left side plate (2) and the right side plate (3) is smaller than the width L2 of the panel (1), so that the left side plate (2) and the right side plate (3) are respectively connected to the panel (1) and have outwardly extending left support member (5) and right support member (6); Viewed from the orthographic projection direction of the outer surface of panel (1), several spaced stationary tooth grooves (11) penetrate at least panel (1), left support member (5) and right support member (6), forming stationary cutter teeth (12) between adjacent stationary tooth grooves (11) in panel (1), and combining with the two sides of panel (1) and left support member (5) and right support member (6) respectively to form left guide teeth (7) and right guide teeth (8). The left guide teeth (7) and right guide teeth (8) are located at both ends of the stationary cutter teeth (12), so that the two ends of the stationary tooth groove (11) extend to the outside of the left side plate (2) and right side plate (3) respectively and communicate with the outside.

2. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of either end of the razor blade, gaps X1 are formed between the left support (5) and the right support (6) and the panel (1), respectively, making the left guide tooth (7) and the right guide tooth (8) hollow.

3. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of either end of the razor blade, one of the left support (5) or the right support (6) forms a gap X1 with the panel (1), making its corresponding guide tooth hollow; the other is in contact with the panel (1), making its corresponding guide tooth solid.

4. The shaving blade according to any one of claims 1 to 3, characterized in that: The gap X1 is less than 0.5mm.

5. The shaving blade according to claim 1, characterized in that: When viewed from the orthographic projection direction of either end of the razor blade, the thickness T1 of the left guide tooth (7) and the thickness T2 of the right guide tooth (8) are set to be the same or different.

6. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of either end of the shaving blade, with the outer surfaces of the left side plate (2) and the right side plate (3) as reference, the length L5 of the left guide tooth (7) and the length L6 of the right guide tooth (8) are set to be the same or different.

7. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of either end of the razor blade, the left guide tooth (7) and / or the right guide tooth (8) are provided with a first clearance groove (91) for removing local material.

8. The shaving blade according to claim 7, characterized in that: Viewed from the orthographic projection direction of either end of the shaving blade, the first clearance groove (91) is convex arc-shaped, so that the corresponding left guide tooth (7) and / or right guide tooth (8) form a first concave arc surface (92) at least partially on the outer side and bottom end face, and the highest point of the first concave arc surface (92) does not exceed half the thickness of the corresponding guide tooth.

9. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of either end of the razor blade, the left guide tooth (7) and / or the right guide tooth (8) are provided with a second clearance groove (93) for removing local material.

10. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of either end of the shaving blade, the second clearance groove (93) is convex arc-shaped, forming a second concave arc surface (94) on the local outer surface and bottom end face of the corresponding left guide tooth (7) and / or right guide tooth (8).

11. The shaving blade according to claim 7 or 9, characterized in that: Viewed from the orthographic projection direction of either end of the razor blade, the first relief groove (91) and the second relief groove (93) formed in the left guide tooth (7) and / or the right guide tooth (8) are misaligned, so that the first concave arc surface (92) and the second concave arc surface (94) with undulating contours are formed in at least a partial outer surface and bottom end surface of the corresponding left guide tooth (7) and / or right guide tooth (8).

12. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of either end of the razor blade, the upper and lower end faces of the left guide tooth (7) and / or the right guide tooth (8) are respectively provided with a third relief groove (95) and a fourth relief groove (96) for removing local material, which reduces the tooth tip thickness of the left guide tooth (7) and / or the right guide tooth (8).

13. The shaving blade according to claim 1, characterized in that: The thickness T3 of the left support member (5) and the thickness T4 of the right support member (6) are different from the thickness T5 of the panel (1), the thickness T6 of the left side plate (2) and the thickness T7 of the right side plate (3); and the thickness T3 of the left support member (5) and the thickness T4 of the right support member (6) are less than the thickness T5 of the panel (1), the thickness T6 of the left side plate (2) and the thickness T7 of the right side plate (3).

14. The shaving blade according to claim 1, characterized in that: The thickness of the two sides of the panel (1) is less than the thickness of the middle, so that the two sides of the panel (1) form inclined slopes (14) respectively, and the slope foot of the inclined slope (14) is smoothly connected to the left support (5) and the right support (6).

15. The shaving blade according to claim 1, characterized in that: The left side plate (2) and the right side plate (3) are connected to the left support member (5) and the right support member (6) respectively by forming an inward slope (21), and the high end of the inward slope (21) is smoothly connected to the left support member (5) and the right support member (6).

16. The shaving blade according to claim 1, characterized in that: First ribs (97) are formed at both ends of the panel (1) along the length direction. The first ribs (97) protrude along the outer or inner surface of the panel (1), so that the thickness T8 at both ends of the panel (1) is greater than the thickness T9 in the middle.

17. The shaving blade according to claim 1, characterized in that: Second ribs (98) are formed at both ends of the left side plate (2) and the right side plate (3) along the length direction. The second ribs (98) protrude along the outer or inner surface of the left side plate (2) and the right side plate (3), so that the thickness of the edges at both ends of the left side plate (2) and the right side plate (3) is greater than the thickness in the middle.

18. The shaving blade according to claim 1, characterized in that: A third rib (99) is formed at both ends of the panel (1) along the length direction. The third rib (99) protrudes along the outer surface of the panel (1), and a fourth rib (100) is provided in the middle of the panel (1) to connect the two third ribs (99), thus dividing the stationary tooth groove (11) in the panel (1) into two independent and non-communicating parts.

19. The shaving blade according to claim 1, characterized in that: Viewed from the orthographic projection direction of the outer surface of panel (1), the tooth tip width L3 of the left guide tooth (7) and / or right guide tooth (8) is less than the tooth root width L4, making the port of the stationary tooth groove (11) between adjacent left guide teeth (7) and / or right guide teeth (8) flared.

20. A cutter head assembly, characterized in that: Includes the shaving blades as described in any one of claims 1 to 19.

21. A pruning tool, characterized in that: Includes the cutter head assembly as described in claim 20.

Images