Razor blades with a novel tooth structure

Abstract

A razor blade with a novel tooth structure includes a blade body having a cutting section. The cutting section has a plurality of spaced-apart cutting teeth, including closed teeth and open teeth, which are spaced apart. The closed teeth protrude towards the side away from the center of the cutting section to form tooth protrusions, and the tooth protrusions are partially recessed to form tooth protrusion grooves. By forming tooth protrusion grooves through the partial recesses on the tooth protrusions, the surface of the tooth protrusions forms an uneven structure. This structure allows the portion of the tooth protrusions near the edge of the tooth protrusion grooves to lift the hair close to the skin during contact with hair, making it easier for these hairs to be captured by the subsequent cutting action, thereby improving shaving efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hair cutting equipment technology, specifically to a razor blade with a novel tooth structure. Background Technology

[0002] In existing technologies, when razors cut hair, the blades are mostly smooth curved or flat surfaces. Therefore, when cutting hair close to the skin, they cannot achieve the best cutting effect, resulting in some hair remaining on the skin surface, which affects the user's shaving experience. Summary of the Invention

[0003] In view of this, the present invention provides a razor blade with a novel tooth structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A razor blade with a novel tooth structure includes a blade body having a cutting section with a plurality of spaced-apart cutting teeth. The cutting teeth include closed teeth and open teeth, which are spaced apart. The closed teeth protrude toward the side away from the center of the cutting section to form a tooth protrusion, and the tooth protrusion is partially recessed to form a tooth protrusion groove.

[0005] Preferably, the blade body has two blade walls, the shearing portion is disposed between the blade walls, the cutting teeth are formed on at least one side of the shearing portion, the two ends of the closed cutting teeth are respectively connected to the shearing portion and the blade wall, one end of the open cutting teeth is connected to the shearing portion, and the other end of the open cutting teeth forms an opening communicating with the interior of the blade body between itself and the blade wall.

[0006] Preferably, the blade walls are symmetrically arranged on both sides of the blade body, and the closed blade teeth and open blade teeth are both arranged between the shearing section and the symmetrical blade walls on both sides.

[0007] Preferably, the toothed groove is disposed on the side of the toothed protrusion closest to the shearing portion along the width direction of the toothed protrusion.

[0008] Preferably, the toothed protrusion forms a first crest portion and a second crest portion on both sides of the toothed protrusion groove. The first crest portion is located on the side of the second crest portion away from the shear portion. The vertical distance from the first crest portion to the shear portion is H1, and the vertical distance from the second sealing portion to the shear portion is H2, wherein H1 ≥ H2.

[0009] Preferably, when H1 is greater than H2, the height difference between H1 and H2 is less than or equal to 1 mm.

[0010] Preferably, the first wave crest is provided with an arc surface structure, the first wave crest and the second wave crest are respectively connected to the two side groove walls of the toothed groove, the toothed groove is provided with an arc groove structure, and the first wave crest, the toothed groove and the second wave crest are continuously and smoothly transitioned.

[0011] Preferably, the portions of the two side walls of the closed blade on the tooth protrusion are inclined toward the center of the end of the tooth protrusion away from the shearing part, so that the cross-sectional shape of the tooth protrusion is an inverted trapezoid.

[0012] Preferably, the closed cutting tooth has an upper tooth portion that connects to the shearing portion and a lower tooth portion that connects to the blade wall, and the tooth protrusion is formed between the upper tooth portion and the lower tooth portion, with both ends of the tooth protrusion connecting to the upper tooth portion and the lower tooth portion respectively.

[0013] Preferably, both the closed and open cutting teeth are inclined to the centerline along the length of the shearing section, and the inclination directions of the closed and open cutting teeth are the same.

[0014] Preferably, the shearing portion is partially sunken to form a skin-adhering groove, which extends to the closed and open blade teeth.

[0015] Preferably, the skin-adhesive grooves are formed on both sides along the length of the sheared portion, and a rib structure protrudes between the two skin-adhesive grooves.

[0016] The beneficial effects of this invention are as follows: by forming a tooth groove by partially recessing the tooth protrusion, the surface of the tooth protrusion forms a concave-convex structure. This structure allows the part of the tooth protrusion near the edge of the tooth groove to lift the hair close to the skin during the contact with hair, making it easier for these hairs to be captured by the subsequent cutting action, thereby improving the hair removal efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Appendix Figure 1 This is a schematic diagram of the design structure; Appendix Figure 2 For the appendix Figure 1 Top view; Appendix Figure 3 For the appendix Figure 2 Sectional view at point AA; Appendix Figure 4 For the appendix Figure 1 Side view. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] This utility model provides the following technical solution: As attached Figure 1-4 As shown, this utility model discloses a razor blade with a novel tooth structure, including a blade body 1. The blade body 1 has a cutting section 2, and the cutting section 2 is provided with a plurality of spaced-apart cutting teeth. The cutting teeth include closed cutting teeth 3 and open cutting teeth 4, which are spaced apart. The closed cutting teeth 3 protrude towards the side away from the center of the cutting section 2 to form tooth protrusions 5, and the tooth protrusions 5 are partially recessed to form tooth protrusion grooves 6. Specifically, in this design, by forming tooth protrusion grooves 6 by partially recessing the tooth protrusions 5, the surface of the tooth protrusions 5 forms an uneven structure. This structure allows the portion of the tooth protrusions 5 near the edge of the tooth protrusion grooves 6 to scrape up the hair close to the skin during contact with hair, making these hairs easier to capture by the subsequent cutting action, thereby improving shaving efficiency.

[0022] Furthermore, the blade body 1 has two blade walls 7, the cutting section 2 is disposed between the blade walls 7, the cutting teeth are formed on at least one side of the cutting section 2, the two ends of the closed cutting teeth 3 are respectively connected to the cutting section 2 and the blade wall 7, one end of the open cutting teeth 4 is connected to the cutting section 2, and the other end of the open cutting teeth 4 forms an opening 8 between itself and the blade wall 7, communicating with the interior of the blade body 1. Specifically, in this embodiment, the opening 8 allows hair to be guided into the interior of the blade body 1 during shaving, further enhancing the shaving effect and reducing hair residue. In addition, the opening 8 also helps to reduce the friction generated during shaving, making the shaving process smoother and improving the user experience. The blade walls 7 not only enhance the overall structural strength of the blade but also make the blade more stable during use.

[0023] Furthermore, the blade walls 7 are symmetrically arranged on both sides of the blade body 1, and the closed blade teeth 3 and open blade teeth 4 are both arranged between the cutting section 2 and the symmetrical blade walls 7 on both sides. Specifically, in this embodiment, the symmetrically arranged blade walls 7 enhance the stability and service life of the blade, allowing the user to obtain a more stable and longer-lasting shaving effect during use.

[0024] Furthermore, the toothed groove 6 is disposed along the width direction of the toothed protrusion 5 on the side of the toothed protrusion 5 near the cutting part 2. Specifically, in this embodiment, the toothed groove 6 is disposed along the width direction of the toothed protrusion 5 on the side of the toothed protrusion 5 near the cutting part 2, which can further improve the hair removal effect, making it easier for the edge of the toothed groove 6 to cut into the hair root when the blade is close to the skin, effectively reducing hair residue.

[0025] Furthermore, the toothed protrusion 5 forms a first wave crest 9 and a second wave crest 10 on both sides of the toothed protrusion groove 6. The first wave crest 9 is located on the side of the second wave crest 10 away from the cutting part 2. The vertical distance from the first wave crest 9 to the cutting part 2 is H1, and the vertical distance from the second sealing part to the cutting part 2 is H2, wherein H1 ≥ H2. Specifically, in this embodiment, the height difference design of the first wave crest 9 and the second wave crest 10 allows the blade to form a smoother cutting path when cutting hair. The higher design of the first wave crest 9 allows it to contact the hair first and guide it to the second wave crest 10 for further cutting. The relatively lower second wave crest 10 can more effectively conform to the skin, ensuring cutting accuracy and comfort. This design not only improves shaving efficiency but also reduces skin irritation, making the process safer and more comfortable.

[0026] Furthermore, when H1 is greater than H2, the height difference between H1 and H2 is less than or equal to 1 mm. Specifically, in this embodiment, the height difference between H1 and H2 is less than or equal to 1 mm, creating a step difference between the first wave crest 9 and the second wave crest 10. This facilitates the removal of hair close to the skin. The step difference design utilizes the elasticity of the hair, causing it to bend slightly upon contact with the first wave crest 9, and then be smoothly cut by the second wave crest 10.

[0027] Furthermore, the first wave crest 9 is configured with an arcuate structure, and the first wave crest 9 and the second wave crest 10 are respectively connected to the two side walls of the toothed groove 6. The toothed groove 6 is configured with an arcuate groove structure, and the first wave crest 9, the toothed groove 6, and the second wave crest 10 are continuously and smoothly transitioned. Specifically, in this embodiment, the arcuate structure design of the first wave crest 9 not only increases the contact area with the hair but also improves the smoothness during cutting and reduces frictional resistance. This continuous and smooth transition design makes the blade cut the hair more smoothly, avoiding skin irritation or discomfort caused by sudden changes. At the same time, the arcuate structure of the first wave crest 9 can better conform to the curvature of the skin, ensuring even force during shaving, further improving the shaving effect and comfort. In addition, the arcuate groove structure design of the toothed groove 6 also helps to improve the shaving effect. The edge of the arcuate groove can cut into the hair root more smoothly, effectively reducing hair residue. At the same time, the structure of the arc-shaped groove also has a certain degree of elasticity, which can produce appropriate deformation when it comes into contact with hair, thereby better adapting to the shape of the hair and ensuring the precision and comfort of the cutting.

[0028] Furthermore, the portions of the side walls of the closed blade teeth 3 located on the tooth protrusions 5 are inclined towards the center of the end of the tooth protrusion 5 furthest from the cutting section 2, making the cross-sectional shape of the tooth protrusion 5 an inverted trapezoid. Specifically, in this embodiment, this inclined design of the side walls of the closed blade teeth 3 allows the tooth protrusions 5 to more easily insert into the hair root when contacting the hair, improving the shaving effect. At the same time, the inverted trapezoidal cross-sectional shape increases the contact area between the tooth protrusion 5 and the hair, making the cutting smoother and reducing cutting resistance. This design not only improves shaving efficiency but also makes the shaving process more comfortable and reduces skin irritation. In addition, the inverted trapezoidal structure also has a certain guiding function, guiding the hair to move towards the center of the blade body, further ensuring the accuracy and comfort of the cutting.

[0029] Furthermore, the closed blade tooth 3 has an upper tooth portion 11 that connects to the shearing portion 2 and a lower tooth portion 12 that connects to the blade wall 7. A toothed protrusion 5 is formed between the upper tooth portion 11 and the lower tooth portion 12, with both ends of the toothed protrusion 5 connecting to the upper tooth portion 11 and the lower tooth portion 12, respectively. Specifically, in this embodiment, the upper tooth portion 11 and the lower tooth portion 12 of the closed blade tooth 3 connect to the shearing portion 2 and the blade wall 7, respectively, ensuring the overall structural stability of the blade.

[0030] Furthermore, both the closed blade teeth 3 and the open blade teeth 4 are inclined along the centerline of the length direction of the cutting section 2, and the inclination directions of the closed blade teeth 3 and the open blade teeth 4 are the same. Specifically, in this embodiment, the inclination angles of the closed blade teeth 3 and the open blade teeth 4 are the same. This design allows the blade to glide more smoothly during shaving, reducing friction and resistance to the skin and improving user comfort. At the same time, the inclined cutting tooth structure also helps to form a certain cutting angle during shaving, making it easier to cut the hair and further improving shaving efficiency.

[0031] Furthermore, the cutting section 2 is partially recessed to form a skin-contact groove 13, which extends onto the closed blade teeth 3 and the open blade teeth 4. Specifically, in this embodiment, the skin-contact groove 13 allows the blade to better conform to the skin surface during hair trimming. The cross-sectional shape of the skin-contact groove 13 is an inverted trapezoid. This design allows the edge of the skin-contact groove 13 to follow the skin contour when the blade contacts the skin, reducing sliding resistance and improving user comfort. At the same time, the inverted trapezoidal cross-sectional shape allows the skin-contact groove 13 to better accommodate the shaved hair, preventing the hair from being pressed back onto the skin during blade movement, further improving the shaving effect.

[0032] Furthermore, the skin-fitting grooves 13 are formed on both sides of the cutting section 2 along its length, and a rib structure 14 protrudes between the two sides of the skin-fitting grooves 13. Specifically, in this embodiment, the thickness of the cutting section 2 where the sunken skin-fitting grooves 13 are located is less than the thickness of the rest of the cutting section 2, resulting in a thinner cutting thickness at that point, which in turn can cut the hair shorter. At the same time, the skin-fitting grooves 13 on both sides and the rib structure 14 cooperate with each other to enhance the overall structural strength of the blade, making the blade more stable and durable during shaving.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A razor blade with a novel tooth structure, comprising a blade body (1), the blade body (1) having a cutting portion (2), the cutting portion (2) having a plurality of spaced-apart cutting teeth, characterized in that: The cutting teeth include closed cutting teeth (3) and open cutting teeth (4), which are spaced apart. The closed cutting teeth (3) protrude toward the side away from the center of the shearing part (2) to form a tooth protrusion (5), and the tooth protrusion (5) is partially recessed to form a tooth protrusion groove (6).

2. The razor blade with the novel tooth structure according to claim 1, characterized in that: The blade body (1) has two blade walls (7), the shearing part (2) is disposed between the blade walls (7), the cutting teeth are formed on at least one side of the shearing part (2), the two ends of the closed cutting teeth (3) are respectively connected to the shearing part (2) and the blade wall (7), one end of the open cutting teeth (4) is connected to the shearing part (2), and the other end of the open cutting teeth (4) forms an opening (8) between the blade body (1) and the blade wall (7).

3. The razor blade with the novel tooth structure according to claim 2, characterized in that: The blade walls (7) are symmetrically arranged on both sides of the blade body (1), and the closed blade teeth (3) and open blade teeth (4) are both arranged between the shearing part (2) and the symmetrical blade walls (7) on both sides.

4. The razor blade with the novel tooth structure according to claim 1, characterized in that: The toothed groove (6) is arranged along the width direction of the toothed protrusion (5) on the side of the toothed protrusion (5) near the shearing part (2).

5. The razor blade with the novel tooth structure according to claim 1, characterized in that: The toothed protrusion (5) forms a first crest portion (9) and a second crest portion (10) on both sides of the toothed protrusion groove (6). The first crest portion (9) is located on the side of the second crest portion (10) away from the shear portion (2). The vertical distance from the first crest portion (9) to the shear portion (2) is H1, and the vertical distance from the second sealing portion to the shear portion (2) is H2. H1 ≥ H2.

6. The razor blade with the novel tooth structure according to claim 4, characterized in that: When H1 is greater than H2, the height difference between H1 and H2 is less than or equal to 1 mm.

7. The razor blade with the novel tooth structure according to claim 4, characterized in that: The first peak portion (9) is arranged in an arc-shaped structure. The first peak portion (9) and the second peak portion (10) are respectively connected to the two side groove walls of the toothed groove (6). The toothed groove (6) is arranged in an arc-shaped groove structure. The first peak portion (9), the toothed groove (6) and the second peak portion (10) are continuously and smoothly transitioned.

8. The razor blade with the novel tooth structure according to claim 1, characterized in that: The portions of both sides of the closed blade (3) located on the tooth protrusion (5) are inclined toward the center of the end of the tooth protrusion (5) away from the shearing part (2), so that the cross-sectional shape of the tooth protrusion (5) is set in an inverted trapezoid.

9. The razor blade with the novel tooth structure according to claim 7, characterized in that: The closed blade (3) has an upper tooth (11) that connects to the shearing part (2) and a lower tooth (12) that connects to the blade wall (7). The tooth protrusion (5) is formed between the upper tooth (11) and the lower tooth (12), and the two ends of the tooth protrusion (5) are connected to the upper tooth (11) and the lower tooth (12) respectively.

10. The razor blade with the novel tooth structure according to claim 2, characterized in that: Both the closed cutting tooth (3) and the open cutting tooth (4) are inclined to the center line of the length direction of the shearing part (2), and the inclination direction of the closed cutting tooth (3) and the open cutting tooth (4) is the same.

11. The razor blade with the novel tooth structure according to claim 1, characterized in that: The shearing section (2) is partially sunken to form a skin-adhesive groove (13), which extends to the closed blade (3) and the open blade (4).

12. The razor blade with the novel tooth structure according to claim 11, characterized in that: The skin-adhesive groove (13) is formed on both sides of the length direction of the shearing part (2), and a rib structure (14) is formed between the two sides of the skin-adhesive groove (13).

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