Hair trimming blade with Y-shaped teeth and tool bit assembly

Abstract

The utility model relates to a hair trimming blade with Y-shaped teeth and a tool bit assembly. The hair trimming blade with the Y-shaped teeth and the tool bit assembly are characterized by comprising at least one panel in contact with skin and side plates arranged on the two sides of the panel. A plurality of blind grooves are formed in the panel, the opening end of each blind groove is communicated with the exterior of the panel, and the depth of each blind groove is larger than half of the width of the panel; by taking the blind groove as a reference, through grooves are formed in the two sides of the blind groove at intervals, and the two ends of each through groove communicate with the exteriors of the two sides of the panel correspondingly, so that a plurality of cutting teeth which are arranged side by side at intervals are formed in the length direction of the panel; from the front projection of the panel, the cutting tooth is provided with two branch teeth and a supporting tooth which are in a Y shape. The beneficial effects of the utility model are that the plurality of blind grooves and the through grooves arranged at the two sides of the blind grooves are arranged, so that the surface utilization rate of the panel is improved, and the wool feeding benefit is improved; meanwhile, the surface area of the solid part of the panel is reduced, the friction resistance between the movable cutter and the panel is reduced, the surface temperature rise of the panel is reduced, and the use comfort of the blade is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hair trimming device, more particularly to a hair trimming blade and a cutter head assembly with Y-shaped teeth, mainly applied to the field of personal care tools such as shavers and epilators. BACKGROUND

[0002] There are mainly two kinds of blades used in the reciprocating hair trimming tool, one is a flexible sheet, such as the one-body reciprocating cutter head assembly and its assembly process applied for on June 28, 2023, and the application number is 2023107802318. This flexible blade will deform when it is pressed by the skin. The other is a hard sheet, such as the cutting assembly of a hair trimming device applied for on June 5, 2020, and the application number is 2020105067357. The thickness of the blade is greater than that of the flexible sheet, and the blade will not deform when it is pressed by the skin.

[0003] In order to facilitate the introduction and trimming of hair by the blade formed by the hard sheet during use, a plurality of hair inlet grooves penetrating through both sides of the blade are arranged side by side and spaced apart on the blade, so that cutting teeth are formed between adjacent hair inlet grooves. When trimming hair, some of the hair will slide out of the hair inlet grooves along the hair inlet grooves under the pushing of the power, which accordingly reduces the trimming efficiency of the hair. Secondly, the contact area between the cutting teeth on the existing blade and the moving cutter is relatively large, which accordingly increases the friction resistance between the moving cutter and the blade during the trimming process, significantly increases the surface temperature of the blade, and reduces the user's comfort and even burns the user's skin. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a hair trimming blade and cutter head assembly with Y-shaped teeth. The hair trimming blade not only delays the sliding of hair and improves the trimming efficiency of hair, but also reduces the friction resistance between the moving cutter and the blade, reduces the surface temperature of the blade, and improves the user's comfort.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme of a hair trimming blade with Y-shaped teeth, which includes at least one face plate in contact with the skin, and side plates on both sides of the face plate. A plurality of blind grooves are arranged on the face plate, the opening end of each blind groove is connected with the outside of the face plate, and the depth of the blind groove is greater than half the width of the face plate. With the blind groove as a reference, through grooves are arranged on both sides of the blind groove, the two ends of each through groove are connected with the outside of the face plate on both sides, so that a plurality of cutting teeth arranged side by side and spaced apart are formed in the length direction of the face plate. From the front projection of the face plate, the cutting teeth have two split teeth and a support tooth in Y shape.

[0006] Preferably, the plurality of blind grooves are symmetrically and staggeredly arranged along the center line of the width of the panel, and the open ends of the blind grooves are respectively connected to the outside of the two sides of the panel, so that a plurality of Y-shaped cutting teeth are formed on the panel.

[0007] Preferably, the through groove includes a first through groove and a second through groove, both ends of the first through groove and the second through groove are respectively connected to the outside of the two sides of the panel, the first through groove and the second through groove have the same width and are symmetrically arranged on both sides of the blind groove with the center line of the blind groove as the reference, or the first through groove and the second through groove have different widths and are arranged on both sides of the blind groove with the center line of the blind groove as the reference.

[0008] Preferably, as viewed from the front of the panel, the groove bottom of each blind groove is V-shaped or C-shaped, gradually narrowing the width of the blind groove bottom, so that the width of one end of the split tooth connected to the support tooth is different from the width of the other end of the split tooth.

[0009] Preferably, each blind groove and the first through groove and the second through groove are arranged side by side in a perpendicular or inclined manner relative to the two side lines of the panel.

[0010] Preferably, the first through groove and the second through groove each include a straight line segment at both ends connected to the outside of the two sides of the panel, and a bending segment between the two straight line segments; wherein the bending segment is a plurality of straight lines or arcs, and the width of the bending segment is different from or the same as the width of the straight line segment.

[0011] Preferably, at least one anti-slip tooth for blocking the sliding of hair is arranged on the opposite two side walls of the bending segment; or at least one anti-slip tooth for blocking the sliding of hair is arranged in one of the side walls of the bending segment.

[0012] Preferably, at least part of the cutting teeth in the panel are provided with accumulation holes near the bottom of the blind groove, wherein at least part or all of the accumulation holes are connected to the blind groove.

[0013] Preferably, the distance between the side plates arranged on both sides of the panel is the same as or different from the width of the panel.

[0014] On the basis of the above-mentioned hair trimming blade, the applicant also proposes a technical scheme of a cutter head assembly, which includes the above-mentioned hair trimming blade with Y-shaped teeth.

[0015] The utility model discloses the depth of blind groove is set greater than half of panel width, like this when hair enters blind groove, can approach the middle area of panel as far as possible, promotes the trimming benefit of hair, second, through being additionally provided with through groove in the blind groove both sides of panel, like this not only has promoted the utilization of panel, has increased the surface hair area of progress, promotes the benefit of progress hair, simultaneously, the surface area of the entity part of panel reduces, when hair trimming, the contact area between movable knife and panel can also reduce obviously, thereby reduce the friction resistance between movable knife and panel, reduce the surface temperature rise of panel, promote the use comfort of blade. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the first embodiment front view of hair trimming blade with Y-shaped tooth of the utility model embodiment

[0017] Figure 2 It is Figure 1 It is the enlarged view of P

[0018] Figure 3 It is the side view of hair trimming blade with Y-shaped tooth of the first embodiment of the utility model embodiment

[0019] Figure 4 It is the perspective view of hair trimming blade with Y-shaped tooth of the first embodiment of the utility model embodiment

[0020] Figure 5 It is the second embodiment front view of hair trimming blade with Y-shaped tooth of the utility model embodiment

[0021] Figure 6 It is the third embodiment front view of hair trimming blade with Y-shaped tooth of the utility model embodiment

[0022] Figure 7 It is the fourth embodiment front view of hair trimming blade with Y-shaped tooth of the utility model embodiment

[0023] Figure 8 It is the fifth embodiment front view of hair trimming blade with Y-shaped tooth of the utility model embodiment PREFERRED EMBODIMENT

[0024] The following will be combined with the drawings Figures 1-8 Further illustrate the utility model embodiment:

[0025] This utility model is a hair trimmer blade with Y-shaped teeth, including at least one panel 1 that contacts the skin, and side plates 2 placed on both sides of the panel 1. The side plates 2 are used for mounting the blade and the stationary blade seat. Multiple blind grooves 3 are provided on the panel 1, allowing hair to enter the blade from the front of the panel 1. The opening end of each blind groove 3 is connected to the outside of the panel 1, so that longer hair can enter the blind groove 3 through the side of the panel 1, thereby enabling the blade to trim both long and short hair.

[0026] like Figure 1 , 2 As shown in Figure 4, in actual production, the blind groove depth T1 is greater than half the panel width T2. The blind groove depth T1 is a deliberate improvement based on collected user habit data. Taking shaving as an example, during shaving, users habitually use the central area of ​​panel 1 to contact the beard on their skin. Therefore, the hair trimming efficiency is highest in the central area of ​​panel 1. In view of this, the applicant has deliberately set the depth of the blind groove 3 to be greater than half the panel width T2 in this technical solution. This way, when the hair enters the blind groove 3, it can get as close as possible to the central area of ​​panel 1, improving the hair trimming efficiency.

[0027] Secondly, the increased depth T1 of the blind groove means that the distance between the hair and the edge of the panel 1 increases accordingly after the hair enters the blind groove 3. During the hair cutting process, the greater the distance between the hair and the edge of the panel 1, the higher the probability of the hair being cut off. This prevents the hair from being pushed out of the blind groove 3 by the blade due to the hair being at the edge of the panel 1, thus improving the efficiency of hair trimming.

[0028] To improve the surface utilization of panel 1, enhance hair-feeding efficiency, and reduce frictional resistance between panel 1 and the moving blade, through slots 4 are provided at intervals on both sides of blind slot 3, with each through slot 4 connected to the outer sides of panel 1 at both ends. This results in multiple parallel and spaced cutting teeth 5 along the length of panel 1. Viewed from the front of panel 1, the cutting teeth 5 have two dividing teeth 51 and a supporting tooth 52 arranged in a Y-shape. By adding through slots 4 on both sides of blind slot 3 in panel 1, not only is the utilization of panel 1 improved, increasing the surface area for hair feeding and enhancing hair-feeding efficiency, but also, due to the reduced surface area of ​​the solid portion of panel 1, the contact area between the moving blade and panel 1 during hair trimming is significantly reduced. This reduces frictional resistance between the moving blade and panel 1, lowers the surface temperature rise of panel 1, and improves the comfort of using the blade.

[0029] Due to the blind grooves 3 and the through grooves 4 arranged in the panel 1, multiple cutting teeth 5 arranged in parallel and in Y shape are formed in the panel 1, and the width of one end of the cutting teeth 5 is greater than that of the other end. If arranged in parallel and in interval, the surface utilization of the panel 1 is relatively low. In view of this, multiple blind grooves 3 are arranged symmetrically and staggered along the center line of the panel width T2, and the opening ends of the blind grooves 3 are respectively communicated with the outside of the two sides of the panel 1 in sequence, so that multiple cutting teeth 5 arranged in parallel and in Y shape are formed in the panel 1. By arranging the cutting teeth 5 in Y shape in parallel and staggered, not only the number of the blind grooves 3 and the through grooves 4 can be increased, but also the surface utilization of the panel 1 can be improved, and the contact area between the moving knife and the panel 1 can be reduced, so that the surface temperature rise of the panel 1 is reduced, and the use comfort of the blade is improved. Secondly, by arranging the cutting teeth 5 in Y shape in parallel and staggered, the opening of the blind groove 3 is formed on each side of the panel 1, so that the hair can enter the blind groove 3 through the opening of the blind groove 3 no matter which side of the panel 1 it is in, and the convenience and efficiency of the hair entering the blade are improved.

[0030] Of course, the cutting teeth 5 in Y shape can also be arranged in parallel and staggered, for example, the cutting teeth 5 in Y shape are arranged in parallel in the same direction, so that the sub-teeth 51 in each cutting tooth 5 are on the same side of the panel 1, and the support teeth 52 are on the opposite side of the panel 1. Although the number of the cutting teeth 5 in Y shape is reduced, other hair guide grooves of other shapes can be arranged on the side of the support teeth 52 in the panel 1 and between the two support teeth 52, so that the surface utilization of the panel 1 can also be improved. However, due to the higher surface utilization of the blade and the more beautiful and elegant overall shape of the blade by arranging the cutting teeth 5 in Y shape symmetrically and staggered, the cutting teeth 5 in Y shape arranged symmetrically and staggered are the preferred embodiment.

[0031] In order to delay the sliding of the hair into the through groove 4, improve the hair trimming effect, the through groove 4 comprises a first through groove 41 and a second through groove 42 which are not straight, and the two ends of the first through groove 41 and the second through groove 42 are respectively connected with the outside of the two sides of the panel 1; the not straight means that the two ends of the first through groove 41 and the second through groove 42 are not on the same straight line, and the two ends are staggered, so that when the hair enters from any end of the first through groove 41 and the second through groove 42, the first through groove 41 and the second through groove 42 which are not straight can block and delay the sliding of the hair, increase the time of the hair sliding out of the first through groove 41 and the second through groove 42, thereby giving the moving knife time to cut along the reciprocating swing of the panel 1, ensuring that the hair entering from any end of the first through groove 41 and the second through groove 42 can be cut off, and improving the hair trimming effect. In the actual production process, the first through groove 41 and the second through groove 42 are symmetrically arranged on the two sides of the blind groove 3 with the center line of the blind groove 3 as the reference to separate the cutting teeth 5 to form independent Y-shaped cutting teeth 5; and the first through groove 41 and the second through groove 42 on the two sides of the Y-shaped cutting tooth 5 can be set to the same or different width.

[0032] In order to reduce the contact area of the moving knife and the panel 1, reduce the surface temperature rise of the panel 1, and improve the shaving sound during hair trimming, as viewed from the front projection of the panel 1, the groove bottom of each blind groove 3 is V-shaped or C-shaped to gradually narrow the width of the blind groove 3 groove bottom, so that the width of the one end of the split tooth 51 connected with the support tooth 52 is different from the width of the other end of the split tooth 51. By setting the shape of the blind groove 3 groove bottom to be V-shaped or C-shaped, not only the solid area of the Y-shaped cutting tooth 5 is reduced, but also the contact area of the moving knife and the Y-shaped cutting tooth 5 is relatively reduced when the moving knife cooperates with the cutting tooth 5 to cut off the hair, the friction resistance between the moving knife and the Y-shaped cutting tooth 5 is reduced, the surface temperature rise of the panel 1 is reduced, and the use comfort of the trimming knife is improved; at the same time, affected by the V-shaped or C-shaped groove bottom, the width of the two ends of each Y-shaped cutting tooth 5 is different, that is, the width of the one end of the split tooth 51 connected with the support tooth 52 is less than the width of the other end of the split tooth 51, affected by the narrowing of the width of the split tooth 51, after cooperating with the moving knife to cut off the hair, the one end of the split tooth 51 with relatively narrow width can form a certain amplitude to emit a crisp sound, thereby improving the use sense of the user.

[0033] In order to improve the cutting sharpness during the hair trimming process, each blind groove 3 and the first through groove 41 and the second through groove 42 are arranged in parallel with the two side lines of the panel 1 in a perpendicular or inclined manner. If it is in a perpendicular manner, the cutting edge of the moving knife is parallel to the cutting edge of the split tooth 51 or the support tooth 52 of the cutting tooth 5, which will affect the cutting sharpness, at this time, the cutting edge of the moving knife can be adjusted to be at an angle with the cutting edge of the split tooth 51 and the support tooth 52 of the cutting tooth 5 to improve the sharpness. If the angle of the cutting edge of the moving knife cannot be adjusted, such as Figure 5As shown, the blind groove 3 and the first and second through grooves 41 and 42 can be inclined to the panel 1, so that the cutting edges of the sub-teeth 51 and the support teeth 52 in the Y-shaped cutting teeth 5 form a certain angle with the moving knife cutting edge to improve the cutting sharpness. The specific setting can be determined according to the specific conditions of the moving knife.

[0034] To avoid the influence of hair sliding on the hair trimming performance of the moving knife, the first and second through grooves 41 and 42 each include a straight line segment 43 connected to the outside of the two sides of the panel 1 at both ends, and a bending segment 44 between the two straight line segments 43. The bending segment 44 is a plurality of straight lines or arcs, and the width of the bending segment 44 is different from or the same as the width of the straight line segment 43, and is preferably different. The first and second through grooves 41 and 42 are respectively provided by the straight line segment 43 and the bending segment 44. When the hair enters through any straight line segment 43 on the two sides of the panel 1, it is affected by the change of direction of the bending segment 44, which can effectively form a blocking and delaying effect on the hair, giving the moving knife time to cut back and forth, ensuring that the hair entering the first and second through grooves 41 and 42 is cut off at one time. To further improve the effect of blocking the hair, the width T3 of the bending segment 44 is smaller than the width T4 of the straight line segment 43. Since the width T3 of the bending segment 44 is narrowed, the blocking and delaying effect on the hair is maximized.

[0035] As shown in Figures 6-8 To further delay the hair from sliding out, at least one anti-slip tooth 6 is provided on the two opposite side walls of the bending segment 44 to block the sliding of the hair. When the hair slides into the bending segment 44, the anti-slip tooth 6 can obviously hinder the hair, increasing the difficulty of the hair sliding forward or backward along the bending segment 44, and playing a bidirectional delaying effect to ensure the trimming effect of the hair. Of course, in actual production, the anti-slip tooth 6 can also be provided on the two opposite side walls of the bending segment 44, so that the blocking effect of the hair is better. However, due to the difficulty in processing the anti-slip tooth 6, for the purpose of easy production and processing, the anti-slip tooth 6 can be provided on only one of the two opposite side walls of the bending segment 44. For the best effect of blocking and delaying, without considering the production and processing factors, the anti-slip tooth 6 can be provided on the two side walls of the bending segment 44, and the specific setting of this embodiment is not limited further.

[0036] As shown in Figures 7-8As shown, to reduce the contact area between the moving blade and the cutting blade and lower the surface temperature rise of the cutting blade during operation, at least some of the cutting teeth 5 in the panel 1 are provided with collecting holes 7 near the bottom of the blind groove 3. At least some or all of the collecting holes 7 are connected to the blind groove 3. By adding collecting holes 7 at the bottom of the blind groove 3 and connecting some or all of the collecting holes 7 to the bottom of the blind groove 3, not only is the solid portion of the Y-shaped cutting teeth 5 reduced, lowering the frictional resistance and surface temperature rise between the moving blade and the panel 1, but the collecting holes 7 also serve to collect hair, reducing the sliding of hair after it enters the bottom of the blind groove 3.

[0037] like Figure 3 As shown, in actual production, the distance T5 between the side plates 2 placed on both sides of the panel 1 can be the same as or different from the width T6 of the panel 1. Using the same width makes it easier to form the panel 1 and side plates 2 in the blade, resulting in higher production efficiency. However, if different widths are used, such as the distance between the two side plates 2 being less than the width of the panel 1, this relatively increases the processing difficulty of the blade, but also brings some additional benefits that facilitate hair introduction. For example, if the distance between the two side plates 2 is less than the panel width T2, it is equivalent to the two side plates 2 contracting inwards towards the panel 1. When encountering long hair, its curled state prevents it from entering the blind groove 3 or through groove 4 from the front of the panel 1. Instead, it can enter from the side of the panel 1. The inward contraction of the side plates 2 avoids blocking the curled long hair, thus facilitating the introduction of long hair into the blade. This expands the blade's applicability, making it suitable not only for trimming long hair but also for trimming short hair.

[0038] Based on the aforementioned hair trimming blade, the applicant also proposes a blade head assembly, which includes the aforementioned hair trimming blade with Y-shaped teeth.

[0039] The above embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A hair trimming blade with Y-shaped teeth, comprising at least one face plate (1) which comes into contact with the skin, and side plates (2) placed on both sides of the face plate (1); characterized in that A plurality of blind grooves (3) are arranged on the panel (1), the opening end of each blind groove (3) is communicated with the outside of the panel (1), and the blind groove depth T1 is greater than half of the panel width T2; with the blind groove (3) as a reference, a through groove (4) is arranged on each side of the blind groove (3) at intervals, the two ends of each through groove (4) are respectively communicated with the outside of the two sides of the panel (1), so that a plurality of cutting teeth (5) arranged side by side and at intervals are formed in the length direction of the panel (1); as viewed from the front projection of the panel (1), the cutting tooth (5) has two split teeth (51) and a support tooth (52) in a Y shape.

2. The hair trimming blade having Y-shaped teeth according to claim 1, characterized in that The plurality of blind grooves (3) are symmetrically and staggeredly arranged along the center line of the width of the panel (1), and the opening end of each blind groove (3) is respectively communicated with the outside of the two sides of the panel (1), so that a plurality of cutting teeth (5) arranged side by side and staggered in a Y shape are formed on the panel (1).

3. The hair trimming blade having Y-shaped teeth according to claim 1, characterized in that The through groove (4) comprises a first through groove (41) and a second through groove (42) in a non-linear shape, and the two ends of the first through groove (41) and the second through groove (42) are respectively communicated with the outside of the two sides of the panel (1); the first through groove (41) and the second through groove (42) have the same width and are symmetrically arranged on the two sides of the blind groove (3) with the center line of the blind groove (3) as a reference; or the first through groove (41) and the second through groove (42) have different widths and are arranged on the two sides of the blind groove (3) with the center line of the blind groove (3) as a reference.

4. The hair trimming blade having Y-shaped teeth according to claim 1, characterized in that As viewed from the front projection of the panel (1), the groove bottom of each blind groove (3) is in a V shape or a C shape, gradually narrowing the groove bottom width of the blind groove (3), so that the width of one end of the split tooth (51) connected with the support tooth (52) is different from the width of the other end of the split tooth (51).

5. The hair trimming blade having Y-shaped teeth according to claim 3, characterized in that Each blind groove (3) and the first through groove (41) and the second through groove (42) are arranged side by side in a perpendicular or inclined manner relative to the two side lines of the panel (1).

6. The hair trimming blade having Y-shaped teeth according to claim 3, characterized in that The first through groove (41) and the second through groove (42) each comprise a straight line segment (43) at the two ends communicated with the outside of the two sides of the panel (1), and a bending segment (44) between the two straight line segments (43); wherein the bending segment (44) is a plurality of straight lines or arcs, and the width of the bending segment (44) is different from or the same as the width of the straight line segment (43).

7. The hair trimming blade having Y-shaped teeth according to claim 6, characterized in that At least one anti-slip tooth (6) for blocking hair sliding is arranged on the two opposite side walls of the bending segment (44); or at least one anti-slip tooth (6) for blocking hair sliding is arranged in one of the side walls of the bending segment (44).

8. The hair trimming blade having Y-shaped teeth according to claim 1, characterized in that At least part of the cutting teeth (5) in the panel (1) is provided with a collection hole (7) near the groove bottom of the blind groove (3), wherein at least part or all of the collection holes (7) are communicated with the blind groove (3).

9. The hair trimming blade having Y-shaped teeth according to claim 1, wherein The distance T5 between the side plates (2) arranged on the two sides of the panel (1) is the same as or different from the width T6 of the panel (1).

10. A tool bit assembly characterized by The hair trimming blade with Y-shaped teeth according to any one of claims 1-9.

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