High-strength and high-sharpness shaving blade

Abstract

The high-strength and high-sharpness shaving blade comprises a blade body part and a blade tooth part, the cutter tooth part comprises a plurality of cutter tooth bodies evenly distributed at the front end of the cutter body part, and a cutter tooth groove is formed between every two adjacent cutter tooth bodies. The bottom of the cutter tooth part further comprises a shovel-shaped body, and the shovel-shaped body enables the cutter tooth groove to have a closed lower end and an open upper end; a reinforcing body with a triangular section is arranged between the shovel-shaped part and each cutter tooth body, and the inclination angle alpha of the side edge of the reinforcing body is larger than or equal to 30 degrees and smaller than or equal to 60 degrees. According to the utility model, the structural characteristic of the shovel-shaped body is added, and the cutter tooth bodies are connected in series, so that the effect of reinforcing the structure is achieved, the pressure can be effectively shared, and the probability that the cutter teeth are broken due to stress is greatly reduced. The blade is provided with the reinforcing body, the reinforcing body is located at the junction of the shovel-shaped part and the blade teeth, the structural strength is further improved, the reinforcing part can guide the hair to move towards the blade tooth grooves in the two sides, then the probability that the hair is accumulated and blocked in the local part is reduced, and the chip removal and shaving efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of razor technology, and in particular to a high-strength, high-sharpness razor blade. Background Technology

[0002] Hair clippers, a common and well-known tool for trimming hair, are primarily used to trim human hair or animal fur. A hair clipper consists of a housing and a motor housed within it. A fixed blade is fixed at the front of the housing, and a movable blade is fixed to the front of the oscillating head via a oscillating frame. The motor drives the oscillating head to oscillate left and right, thereby moving the movable blade relative to the fixed blade and achieving the hair trimming function. Motors are divided into rotary motors and oscillating motors. Rotary motors are rotating electromagnetic machines that operate based on the principle of electromagnetic induction, used to convert mechanical energy into electrical energy. Simultaneously, rotary motors use transmission mechanisms to convert rotational motion into reciprocating oscillation, typically such as cam mechanisms or eccentric linkage structures.

[0003] The razor blade is the main working component of a shaver or hair trimmer. Current shavers and hair trimmers mainly include rotary and reciprocating types. The razor blade rotates or oscillates within the shaver head, causing it to move relative to the fixed foil to cut the hair that gets between the blade and the foil. The cutting end of the razor blade typically has multiple cutting teeth spaced apart. The sharpness and shape of these teeth significantly affect the hair-cutting effect.

[0004] Example 1 of the prior art, referring to patent document CN116766273A, discloses a razor blade and its manufacturing method. The razor blade includes: a blade body; multiple cutting teeth, spaced apart on the blade body, with a cutting groove formed between two adjacent cutting teeth, and a cutting edge formed at the intersection of the wall of the cutting groove and the lower end face of the cutting tooth. In this invention, the slope of the groove line is set to gradually increase along the direction away from the cutting edge, and the slope of the groove line near the cutting edge is smaller, making the cutting edge sharper. When the cutting tooth extends from the bottom surface to the top surface, the tooth width of the cutting tooth changes non-linearly, and the tooth width decreases more slowly. Therefore, the two side walls of the cutting tooth will not intersect prematurely. The tooth width of the upper middle part of the cutting tooth is wider, and the overall tooth thickness is also thicker, making the overall rigidity of the cutting tooth higher.

[0005] Example 2 of the prior art, referring to patent document CN110815296A, relates to a shaving razor and shaving device, which mainly solves the technical problems of existing shaving razors having sharp teeth that easily pierce the skin and pose safety hazards. Its characteristic is that the thickness H1 of the tip of the teeth is greater than the thickness H of the tip of the teeth, and the end face of the tip of the teeth has a rounded chamfer. The beneficial effect of this invention is that by increasing the thickness of the tip of the teeth, the tip of the teeth can be rounded, avoiding the formation of sharp teeth. During use, the smooth tip of the teeth effectively prevents the tip of the teeth from being too sharp and piercing the skin or scalp, thereby effectively improving the safety of using the shaving razor. Moreover, the rounded tip of the teeth greatly improves the comfort of using the shaving razor and enhances the user experience.

[0006] Example 3 of the prior art, referring to patent document CN221066354U, discloses a skin-friendly fixed blade, including a blade body and a blade head. The blade head includes multiple spaced-apart teeth, with a groove between adjacent teeth. The groove extends linearly to and through the blade body. Each tooth includes a tooth tip and a tooth body extending downward from the tooth tip. The tooth tip is inclined and forms an angle with the blade body. The back of the tooth body extends to the blade body and is on the same plane as the end face of the blade body. The two sides of the tooth body are symmetrical and inclined, forming a cutting edge on its front side. This utility model uses a through-groove structure, which helps to avoid hair, improves the smoothness of hair entry and exit, and makes the overall shape fit the skin better. The structure of the teeth body is more conducive to hair entry and exit, improving the hair trimming effect.

[0007] Based on the above three examples of existing technologies, and summarizing from their descriptions and accompanying drawings, it can be seen that existing blades all use through-type tooth grooves at the cutting teeth, lacking a connecting structure between adjacent teeth. Furthermore, in order to obtain sufficient sharpness, each tooth needs to be made as thin as possible, resulting in poor strength. Therefore, the existing tooth structure has a functional contradiction: thin teeth have poor strength and are easily worn out; thick teeth have good strength but are not sharp enough.

[0008] Therefore, we continue to develop a new blade to overcome the shortcomings of the existing blade. Summary of the Invention

[0009] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a shaving blade with high strength and high sharpness.

[0010] The technical solution of this utility model to solve its technical problem is: a high-strength, high-sharpness shaving blade, including a blade body and a toothed part;

[0011] The cutting tooth section includes a plurality of cutting teeth evenly distributed at the front end of the blade section, and a cutting tooth groove is formed between two adjacent cutting teeth.

[0012] The bottom of the cutting tooth portion also includes a shovel-shaped body, which makes the cutting tooth groove have a closed lower end and an open upper end;

[0013] The shovel-shaped part and each of the cutting teeth are connected by a reinforcing body with a triangular cross-section. The side inclination angle of the reinforcing body is α, and satisfies 30°≤α≤60°.

[0014] In an optional example, the tilt angle α is 45°.

[0015] In an optional example two, the tilt angle α is 50°.

[0016] In some preferred embodiments of this utility model, the front end of the reinforcing body protrudes beyond the front end of the shovel-shaped body, and the front end of the blade tooth portion is flush with the front end of the reinforcing body, and the front end of the reinforcing body has a rounded chamfered side.

[0017] A specific embodiment of the cutting tooth body is that the cutting tooth body has a first wedge-shaped section, a straight section and a second wedge-shaped section from front to back, and the first wedge-shaped section, the straight section and the second wedge-shaped section are arranged from bottom to top.

[0018] Another embodiment of the cutting tooth body is that the lower end of the cutting tooth portion is recessed with a weight-reducing groove, and the weight-reducing groove extends into each cutting tooth body so that the cutting tooth body forms a hollow structure.

[0019] In a specific embodiment of the blade part, a positioning groove and a connecting hole are provided on the blade part so that the blade part can be detachably connected and fitted with an external shaving tool.

[0020] In some embodiments of this utility model, the cutting tooth body gradually thickens from front to back, so that the lateral dimension of the cutting tooth groove gradually decreases from front to back.

[0021] Preferably, the blade and the toothed part are made into a single piece using MIM metal forming process.

[0022] Preferably, both the blade and the teeth are made of 420W stainless steel.

[0023] The beneficial effects of this utility model are as follows:

[0024] First, the addition of a "shovel-shaped" structural feature allows the individual cutting teeth to be connected, resulting in structural reinforcement, effectively distributing pressure, and greatly reducing the chance of the cutting teeth breaking under stress.

[0025] Second, the blade groove has a closed lower end and an open upper end. The open upper end allows hair to enter and exit smoothly without obstruction and without affecting the normal shaving function; the closed lower end serves as a structural connection for the blade components.

[0026] Third, it has a "reinforcing body" located at the junction of the shovel-shaped part and the blade teeth. This reinforcing body can further enhance the structural strength and distribute the force on the blade teeth. The cross-section of the reinforcing body is triangular, so when the hair is shaved off, the reinforcing body can guide the hair to move to the blade teeth grooves on both sides, thereby reducing the chance of hair accumulation and blockage in a local area and improving the efficiency of dandruff removal and shaving.

[0027] IV. The blade and cutting teeth are manufactured as a single piece using the MIM (Metal Injection Molding) process. MIM machining of 420W stainless steel offers significant advantages in terms of complex shapes, material utilization, production efficiency, mechanical properties, surface quality, cost-effectiveness, and environmental friendliness, making it suitable for mass production of high-precision parts.

[0028] 5. Both the blade body and the serrations are made of 420W stainless steel, giving the blade high hardness, corrosion resistance, wear resistance, and good machinability. Attached Figure Description

[0029] Figure 1 This is a front structural diagram of the present invention.

[0030] Figure 2 yes Figure 1 A magnified schematic diagram of a portion of the structure in section A.

[0031] Figure 3 This is a schematic diagram of the back structure of this utility model.

[0032] Figure 4 yes Figure 1 A magnified schematic diagram of a local structure in section B.

[0033] Figure 5 This is the front view of this utility model.

[0034] Figure 6 yes Figure 5 A magnified schematic diagram of a local structure in section C.

[0035] Figure 7 yes Figure 6 A cross-sectional view along the DD direction (with an inclination angle of α of 50°).

[0036] Figure 8 yes Figure 6 A cross-sectional view along the DD direction (with an inclination angle of α of 45°).

[0037] In the diagram: 1. Blade body; 11. Positioning groove; 12. Connecting hole; 2. Blade tooth section; 21. Blade tooth body; 211. First wedge-shaped section; 212. Straight section; 213. Second wedge-shaped section; 22. Blade tooth groove; 23. Shovel-shaped body; 231. Front end of shovel-shaped body; 24. Weight reduction groove; 241. Hollow structure; 3. Reinforcing body; 31. Front end of reinforcing body; 32. Rounded chamfered side. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0039] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Example 1

[0042] Reference Figures 1 to 8 A high-strength, high-sharpness shaving blade includes a blade body 1 and a toothed part 2; the toothed part 2 includes a plurality of toothed bodies 21 evenly distributed at the front end of the blade body 1, and a toothed groove 22 is formed between two adjacent toothed bodies 21; the bottom of the toothed part 2 also includes a shovel-shaped body 23, the shovel-shaped part causing the toothed groove 22 to have a closed lower end and an open upper end; a reinforcing body 3 with a triangular cross-section is provided between the shovel-shaped part and each toothed body 21, the side inclination angle of the reinforcing body 3 is α, and satisfies 30°≤α≤60°.

[0043] The above describes the basic structural design of the blade in this utility model. The functions and roles of the blade body 1 and the toothed part 2 are consistent with those in the prior art, and will not be elaborated further here. The differences compared to the prior art are at least as follows: First, the addition of the structural feature of the "shovel-shaped body 23" can connect the various toothed bodies 21, thereby strengthening the structure, effectively distributing the pressure, and greatly reducing the probability of the toothed parts breaking under stress. Second, the toothed groove 22 has a closed lower end and an open upper end. The open upper end allows for smooth entry and exit of hair without obstruction, and does not affect the normal shaving function. The closed lower end serves as the structural connection of the toothed parts. Third, the presence of a "reinforcing body 3" located at the junction of the shovel-shaped part and the toothed parts further enhances the structural strength, disperses the force on the toothed bodies 21, and the cross-section of the reinforcing body is triangular. Thus, when the hair is shaved off, the reinforcing body can guide the hair to move towards the toothed grooves 22 on both sides, thereby reducing the probability of hair accumulation and obstruction in certain areas, and improving the efficiency of dandruff removal and shaving.

[0044] For an example of an optional tilt angle α, see [link to example]. Figure 8 ;reference Figure 7 The tilt angle α is 45°, and the tilt angle α is 50°. A larger tilt angle α can provide a more obvious structural reinforcement effect, but the drawback is that it will occupy a larger space in the tooth groove 22. Therefore, the size of the tilt angle α can be customized according to the specific size of the blade and actual needs.

[0045] Generally, machining significantly increases the difficulty of processing small parts, especially in this invention where the shovel-shaped part and reinforcing body 3 are difficult to machine using CNC machine tools. While 3D printing can overcome the limitations of machining, it is costly and inefficient, making mass production impossible. To address these shortcomings, preferably, the blade part 1 and the tooth part 2 are manufactured as a single piece using MIM (Metal Injection Molding) metal forming technology. MIM processing of 420W stainless steel offers significant advantages in terms of complex shapes, material utilization, production efficiency, mechanical properties, surface quality, cost-effectiveness, and environmental friendliness, making it suitable for mass production of high-precision parts.

[0046] Preferably, both the blade body 1 and the toothed part 2 are made of 420W stainless steel. This has several advantages: first, it gives the blade high hardness, which can generally reach 50-55 HRC through heat treatment; second, it has corrosion resistance, which is superior to ordinary carbon steel; third, it has wear resistance, making it suitable for long-term use in high-wear environments such as shaving; and fourth, it has good machinability, especially enabling MIM metal forming processes.

[0047] Example 2

[0048] Based on the structural foundation of Embodiment 1, this embodiment provides several more preferred structural solutions, with reference to... Figures 1 to 8 Specifically:

[0049] I. Structural Design of Reinforcing Body 3: The front end of the reinforcing body 3 protrudes beyond the front end of the shovel-shaped body 23, and the front end of the blade teeth 2 is flush with the front end of the reinforcing body 3. The reinforcing body 3 and the front end of the blade teeth combine to form a larger contact area. This allows for a larger contact area when the blade contacts the skin during the initial shaving stage, effectively dispersing the force and significantly reducing the likelihood of damage to the front end of the blade teeth due to excessive local pressure. Furthermore, the front end of the reinforcing body 3 has a rounded chamfered side 32, making the contact surface smoother and reducing the likelihood of side damage during contact.

[0050] II. Structural scheme of the cutting tooth body 21: The cutting tooth body 21 has a first wedge-shaped section 211, a straight section 212 and a second wedge-shaped section 213 from front to back, and the first wedge-shaped section 211, the straight section 212 and the second wedge-shaped section 213 are arranged from bottom to top.

[0051] In the existing technology, the blade body 21 basically adopts a single-segment wedge structure. However, in the scenarios where the blade is used, there are hairs of varying lengths. In complex environments, the shaving efficiency of the single-segment wedge structure blade body 21 for some hairs will be greatly reduced. Specifically, even after several repetitive operations, some hairs cannot be shaved off the skin.

[0052] Therefore, the three-section blade body 21 (first wedge-shaped section 211, straight section 212, and second wedge-shaped section 213) provided in this embodiment can meet the shaving needs of different hair lengths. In the case of short hair, the first wedge-shaped section 211 plays the main shaving role, and in the case of long hair, the second wedge-shaped section 213 plays the main shaving role, so that a single blade can efficiently remove hair of different lengths.

[0053] III. Lightweight Blade Structure: The lower end of the blade tooth portion 2 is recessed with a weight-reducing groove 24, which extends into each blade tooth body 21, forming a hollow structure 241 within each blade tooth body 21. The weight-reducing groove 24 and the hollow structure 241 reduce the blade's weight, particularly balancing the increased weight due to the addition of the shovel-shaped portion. This balance results in a lightweight blade with performance almost identical to existing blade structures.

[0054] IV. Blade Assembly Structure: The blade body 1 is provided with a positioning groove 11 and a connecting hole 12, so that the blade body 1 can be detachably connected to the external shaving device. When the blade is combined with the shaving device, the positioning groove 11 performs a pre-positioning function, and the connecting hole 12 performs a fixed connection function.

[0055] V. The dimensions of the blade body 21 and the thickness of the blade groove 22: The blade body 21 gradually thickens from front to back. This design serves two purposes: firstly, it makes the front end of the blade body 21 sharper, allowing for more efficient removal of hair from the skin upon contact; secondly, the thicker rear end of the blade body 21 enhances structural strength, making it stronger and able to withstand greater impact. On the other hand, the lateral dimension of the blade groove 22 gradually decreases from front to back, allowing the shaved hair to converge towards the center of the blade groove 22 during shaving, preventing hair accumulation near the blade body 21 and improving shaving efficiency for smoother and more continuous hair removal.

[0056] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0057] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-strength, high-sharpness shaving blade, characterized in that: It includes the blade part (1) and the serration part (2); The blade tooth section (2) includes a plurality of blade teeth (21) evenly distributed at the front end of the blade body section (1), and a blade tooth groove (22) is formed between two adjacent blade teeth (21); The bottom of the blade tooth part (2) also includes a shovel-shaped body (23), which makes the blade tooth groove (22) have a closed lower end and an open upper end; The shovel-shaped part and each of the blade teeth (21) have a reinforcing body (3) with a triangular cross section. The side inclination angle of the reinforcing body (3) is α, and satisfies 30°≤α≤60°.

2. The high-strength, high-sharpness shaving blade according to claim 1, characterized in that: The tilt angle α is 45°.

3. The high-strength, high-sharpness shaving blade according to claim 1, characterized in that: The tilt angle α is 50°.

4. The high-strength, high-sharpness shaving blade according to claim 1, characterized in that: The front end of the reinforcing body (3) protrudes beyond the front end of the shovel-shaped body (23), and the front end of the blade tooth (2) is flush with the front end of the reinforcing body (3), and the front end of the reinforcing body (3) has a rounded chamfered side (32).

5. The high-strength, high-sharpness shaving blade according to claim 1, characterized in that: The cutting tooth body (21) has a first wedge-shaped section (211), a straight section (212), and a second wedge-shaped section (213) from front to back, and the first wedge-shaped section (211), the straight section (212), and the second wedge-shaped section (213) are arranged from bottom to top.

6. The high-strength, high-sharpness shaving blade according to claim 1, characterized in that: The lower end of the cutting tooth part (2) is recessed with a weight-reducing groove (24), which extends into each cutting tooth body (21) so that the cutting tooth body (21) forms a hollow structure (241).

7. The high-strength, high-sharpness shaving blade according to claim 1, characterized in that: The blade part (1) is provided with a positioning groove (11) and a connecting hole (12) so that the blade part (1) can be detachably connected to the external shaving tool.

8. The high-strength, high-sharpness shaving blade according to claim 1, characterized in that: The blade body (21) gradually thickens from front to back, so that the lateral dimension of the blade groove (22) gradually decreases from front to back.

9. The high-strength, high-sharpness shaving blade according to any one of claims 1-8, characterized in that: The blade part (1) and the tooth part (2) are made into one piece by MIM metal forming process.

10. The high-strength, high-sharpness shaving blade according to claim 9, characterized in that: Both the blade part (1) and the tooth part (2) are made of 420W stainless steel.

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