A razor cartridge structure with large arc face cutter net and odd number of cutter leg staggered frequency cutter

Abstract

A razor head structure with large cambered screen and odd number of frequency-mismatched blades, comprising a screen and a moving blade, the working screen surface of the screen is a large curvature arc structure, and an arc-shaped hair inlet groove is arranged on the screen, the moving blade is provided with an odd number of inner ring blade feet and an odd number of outer ring blade feet, the inner ring blade feet and the outer ring blade feet are arranged in a frequency-mismatched manner, and blade surfaces are arranged on the outer ring blade feet and the inner ring blade feet, and the blade surfaces and the hair inlet groove can be matched to realize cooperative cutting of arc-shaped shearing, arc-shaped rotary cutting and variable shearing angle. The present application has the advantages of smooth and close fitting, frequency-mismatched noise reduction, high safety, multiple cutting modes, improved shaving fineness and overall comfortable experience.

Description

Technical Field

[0001] This invention belongs to the technical field of daily necessities, specifically relating to a razor blade assembly structure with a large arc-shaped blade mesh and an odd number of staggered blade feet. Background Technology

[0002] Rotary electric shavers are widely used personal care tools in daily life. The structural design of their core component, the shaver assembly (composed of the foil, blades, and trimmer), directly determines the comfort, noise level, and safety of shaving. Currently, most rotary shaver shavers use a flat or double-curved foil design, with the blades typically having an even number of feet, and the blade edges are not chamfered. Flat or double-curved foils do not conform well to the facial contours, easily creating gaps or excessive pressure between the foil and skin during shaving, resulting in uneven shaving, poor smoothness, and requiring users to repeatedly shave the same area, increasing skin friction and discomfort. Furthermore, the existing blades often have an even number of symmetrically arranged inner and outer rings. During high-speed rotation, the vibration frequencies of each blade are the same or harmonic, creating a resonance effect that significantly increases the noise level of the shaver, negatively impacting the user experience. The existing blades lack chamfered edges, creating sharp angles between the blade tip and the edge. During shaving, when the skin is pressed into the foil groove, it easily comes into direct contact with the blade's sharp angle, causing scratches or punctures, resulting in burning sensations or skin breakage. This poses a significant safety hazard, especially for users with sensitive skin. Traditional shaving assemblies and foils only achieve simple straight-line cutting, unable to adaptively adjust the cutting angle according to beard direction and density. This leads to inefficient cutting of angled or drooping beard hairs, resulting in insufficient shave. This traditional design suffers from significant comfort deficiencies, excessive noise, and safety hazards when facing different facial contours and beard types, failing to meet users' core needs for a quiet, comfortable, and safe shaving experience. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention proposes a razor assembly structure with a large arc-shaped foil and odd-numbered staggered blades, which provides a smooth and close fit, reduces noise due to staggered frequency, ensures high safety, and offers multiple cutting modes to improve shaving cleanliness and overall comfort.

[0004] The technical solution adopted in this invention is: A razor blade assembly structure with a large arc-shaped blade net and an odd number of staggered blades includes a blade net and a moving blade. The working surface of the blade net is a large-curvature arc structure with an arc-shaped hair inlet groove. The moving blade has an odd number of inner and outer ring blades arranged at staggered frequencies. Both the outer and inner ring blades have cutting edges. The cutting edges and the hair inlet groove can cooperate to achieve coordinated cutting of arc-shaped shearing, arc-shaped rotary cutting, and variable shearing angle.

[0005] Furthermore, a decorative piece is provided in the middle of the blade mesh, and the upper surface of the decorative piece is seamlessly spliced ​​with the working mesh surface of the blade mesh to form a complete large arc contour, reducing the sense of unevenness during movement and improving the comfort of movement.

[0006] Furthermore, the cutting edge is a straight edge, an arc edge, or a reverse arc edge.

[0007] Furthermore, the edges of both the outer and inner ring cutting edges are treated with large chamfers.

[0008] Furthermore, the blade mesh has an inner mesh and an outer mesh, and both the inner mesh and the outer mesh are provided with bow-shaped entry grooves.

[0009] Furthermore, one side wall of the beard groove has an arc-shaped structure, while the other side wall has one of the following structures: a straight structure, an inwardly concave arc-shaped structure, an outwardly convex arc-shaped structure, or an arc-shaped structure. The arc-shaped curve changes gently within a small range, eliminating local sharp points and reducing abrupt changes, while also serving to gather and trim the beard hairs.

[0010] Furthermore, the feed grooves of the inner mesh and the feed grooves of the outer mesh are staggered and arranged at an angle, so that the blade mesh can maintain a smooth movement experience in different directions.

[0011] Furthermore, the spacing between the feed grooves of the inner mesh is greater than the spacing between the feed grooves of the outer mesh.

[0012] The beneficial effects of this invention are: 1. Revolutionary improvement in shaving smoothness: The large arc-shaped blade and decorative blade are seamlessly spliced ​​to form a complete arc surface that closely conforms to the contours of the face, achieving a natural and smooth gliding experience during shaving and completely solving the problems of poor fit and insufficient smoothness of traditional flat or double arc-shaped blades.

[0013] 2. Unique "Frequency-Offset Noise Reduction" Mechanism: The frequency-offset layout of odd-numbered blades in the inner and outer rings breaks the resonance condition from the source of vibration, so that the vibrations generated by each blade are offset in frequency, avoiding energy superposition and achieving a significant noise reduction effect.

[0014] 3. Significantly improves shaving safety: The large chamfered corners of the blade edges eliminate the risk of the blade edges cutting the skin while ensuring the sharpness of the blade, reducing the probability of skin irritation to an extremely low level, providing a safety guarantee, especially for users with sensitive skin.

[0015] 4. Multiple cutting modes work together efficiently: The bow-shaped shearing, bow-shaped rotary cutting and variable shearing angle work together to achieve comprehensive and efficient cutting of beards in all directions and of all types, significantly improving shaving efficiency, greatly improving the cleanliness of the shave, and reducing the overall shaving time by 20%-35%.

[0016] 5. Ultimate Comfort Experience: The smooth fit of the large curved surface, the quiet operation of the staggered frequency design, the safety protection of the large chamfer, and the efficient cutting of the multi-cutting mechanism work together to allow users to complete a shave under low pressure, low noise, and low risk conditions, achieving a perfect balance between functionality and comfort.

[0017] 6. Precisely targets comfortable shaving scenarios: Designed for users who seek a quiet, comfortable, and safe shaving experience, while solving the three core pain points of traditional shavers: "loud noise, poor comfort, and easy skin damage". Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the large arc surface structure of the blade mesh of the present invention; Figure 3 This is a schematic diagram of the moving blade structure of the present invention; Figure 4 This is a schematic diagram of the straight-blade structure of the moving blade of the present invention; Figure 5 This is a schematic diagram of the arc-shaped blade structure of the moving blade of the present invention; Figure 6 This is a schematic diagram of the reverse arc edge structure of the moving blade of the present invention; Figure 7-13 This is a schematic diagram of the structure of the different bow-shaped inlet grooves of the present invention.

[0019] Figure 14 This is a schematic diagram of the shearing process of the moving blade and the bow-shaped feed groove of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments, but the invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements, and equivalents that may be included within the scope of the claims.

[0021] See Figure 1This embodiment provides a razor assembly structure with a large-arc foil and odd-numbered staggered blades, including a decorative piece 1, a foil 2, a moving blade 3, and a blade shaft 4. The working surface of the foil 2 is a large-curvature arc structure with an arc-shaped feed groove 21. The moving blade 3 has an odd number of inner ring blades 32 and an odd number of outer ring blades 31, which are staggered. Both the outer ring blades 31 and the inner ring blades 32 have a cutting edge 33. The cutting edge 33 and the feed groove 21 can cooperate to achieve arc-shaped shearing, arc-shaped rotary cutting, and variable shearing angle synergistic cutting. In this embodiment, the foil 2 has a decorative piece 1 in the middle. The upper surface of the decorative piece 1 is seamlessly spliced ​​with the working surface of the foil 2 to form a complete large-arc contour 22, reducing the unevenness during movement and improving the comfort of movement. The foil features a large curved surface design, with the working surface exhibiting a high curvature arc. It seamlessly integrates with the decorative blade to form a complete large curved profile, with a radius of curvature ranging from R65 to R170mm, preferably R80 to R140mm. This large curved surface design significantly increases the contact area between the foil's working surface and the facial contours, reducing facial pressure. During shaving, the foil can glide naturally along the facial curves, greatly improving the smoothness and comfort of the shave.

[0022] In this embodiment, both the inner and outer rings of the blade employ an odd number of cutting feet. During high-speed rotation, the fundamental vibration frequency generated by the inner ring cutting foot 32 differs from that generated by the outer ring cutting foot 31. These frequencies are staggered, avoiding resonance and harmonic superposition effects, effectively reducing the shaver's operating noise at its source. This "frequency-spacing" design disperses the vibrations generated by each cutting foot in the time domain, preventing concentrated energy superposition and achieving a significant noise reduction effect. In other words, this invention, through a frequency-spacing layout, ensures that the vibration frequencies generated by the inner and outer ring cutting feet during rotation are staggered, avoiding resonance superposition and effectively reducing operating noise. The cutting edge 33 is a straight edge, an arc edge, or a reverse arc edge, see [link to relevant documentation]. Figure 4-5 As shown.

[0023] In this embodiment, the edges of both the outer ring blade 31 and the inner ring blade 32 are chamfered, replacing the original sharp right-angled edges with smooth transition surfaces. When the skin is squeezed into the foil groove, the smooth blade edges will not cut or scratch the skin, but will glide smoothly along the arc surface, significantly reducing the risk of skin lacerations and improving shaving safety. This design effectively eliminates the potential damage to the skin from the blade edges while ensuring the sharpness of the blade edge.

[0024] See Figure 14In this embodiment, the moving blade 3 can cooperate with the bow-shaped beard inlet groove 21 to form multiple cutting modes, including bow-shaped shearing, bow-shaped rotary cutting, and variable shearing angle. Bow-shaped shearing: When the blade moves within the bow-shaped beard inlet groove 21, the arc-shaped inner wall of the groove and the blade edge form an arc-shaped shearing opening 24, generating shearing force on the beard rather than impact force, resulting in higher cutting efficiency and a cleaner cut. Bow-shaped rotary cutting: During blade rotation, the arc-shaped structure of the bow-shaped inlet groove 21 guides the beard along an arc into the cutting zone, achieving rotary cutting. This is significantly more effective than straight-line shearing for cutting obliquely growing or drooping beards. Variable shearing angle: The arc-shaped structure of the bow-shaped inlet groove allows the blade to form different shearing angles with the blade mesh at different positions. The shearing angle can be adaptively adjusted according to the thickness and direction of the beard, achieving efficient cutting of different types of beards. The three cutting modes—bow-shaped shearing, bow-shaped rotary cutting, and variable shearing angle—work in tandem, simultaneously operating within the entire effective working area of ​​the blade foil. This achieves comprehensive and efficient cutting of all types and directions of beard hair, significantly reducing shaving time and improving shaving cleanliness. Furthermore, the outer beard inlet 25 of the beard inlet groove 21 is enlarged for easier beard feeding.

[0025] Specifically, the blade 2 has an inner mesh 22 and an outer mesh 23, both of which are provided with arched beard-feeding grooves 21. One side wall of each beard-feeding groove 21 has an arched structure, while the other side wall has one of the following structures: a straight structure, a concave arc structure, a convex arc structure, or an arched structure. The arc-shaped curve changes gently within a small range, eliminating local sharp points and reducing abrupt cuts, while also gathering and trimming the beard hairs. The beard-feeding grooves of the inner mesh 22 and the outer mesh 23 are staggered and diagonally arranged, ensuring a smooth movement experience in different directions. The spacing between the beard-feeding grooves of the inner mesh 22 is greater than the spacing between the beard-feeding grooves of the outer mesh 23. See also Figure 7-9 Both sides of the inlet groove 21 have an arched structure, and the slope of the inlet groove is inconsistent. See [link / reference] Figure 10 One side wall of the feed groove 21 has an arc-shaped structure, while the other side wall has a straight structure. (See also...) Figure 11 , Figure 13 One side wall of the feed groove 21 has an arched structure, while the other side wall has an outwardly convex arc-shaped structure. (See also...) Figure 12 One side wall of the inlet groove 21 has an arc-shaped structure, and the other side wall has an inwardly concave arc-shaped structure.

[0026] This invention revolutionizes shaving smoothness: the large-arc foil and decorative blade are seamlessly integrated to form a complete arc surface that closely conforms to the facial contours, achieving a natural and smooth gliding experience during shaving. It completely solves the problems of poor fit and insufficient smoothness associated with traditional flat or double-arc foils. Its unique "off-frequency noise reduction" mechanism: the off-frequency layout of the odd-numbered blades on the inner and outer rings breaks the resonance condition at the source of vibration, causing the vibrations generated by each blade to be staggered in frequency, avoiding energy superposition and achieving a significant noise reduction effect. It significantly improves shaving safety: the large chamfered rounded corners of the blade edges eliminate the risk of the blade edges cutting the skin while ensuring sharpness, reducing the probability of skin irritation to an extremely low level, especially providing safety for users with sensitive skin. Multiple cutting modes work synergistically: the bow-shaped shearing, bow-shaped rotary cutting, and variable shear angle cutting modes work together to achieve comprehensive and efficient cutting of all directions and types of beard, significantly improving shaving efficiency and cleanliness, and reducing overall shaving time by 20%-35%. Ultimate Comfort Experience: The smooth, close shave with a large curved surface, quiet operation with staggered frequency design, safety protection with a large chamfer, and efficient cutting with multiple abrasion techniques work together to allow users to shave under low pressure, low noise, and low risk conditions, achieving a perfect balance between functionality and comfort. Precisely Targeted Comfort Shaving Scenarios: Designed specifically for users who seek a quiet, comfortable, and safe shaving experience, it addresses the three core pain points of traditional shavers: high noise, poor comfort, and skin irritation.

Claims

1. A razor assembly structure with a large arc-shaped foil and odd-numbered staggered blades, comprising a foil and moving blades, characterized in that: The working surface of the blade mesh is a large-curvature arc structure with an arc-shaped feed groove. The moving blade has an odd number of inner ring blades and an odd number of outer ring blades. The inner and outer ring blades are arranged at staggered frequencies. Both the outer and inner ring blades are provided with cutting edges. The cutting edges and the feed grooves can cooperate to achieve bow-shaped shearing, bow-shaped rotary cutting, and variable shearing angle collaborative cutting.

2. The razor blade assembly structure with a large arc-shaped foil and odd-numbered staggered blades according to claim 1, characterized in that: A decorative piece is provided in the middle of the blade mesh, and the upper surface of the decorative piece is seamlessly spliced ​​with the working mesh surface of the blade mesh to form a complete large arc contour.

3. The razor blade assembly structure with a large arc-shaped foil and odd-numbered staggered blades according to claim 1, characterized in that: The cutting edge is a straight edge, an arc edge, or a reverse arc edge.

4. The razor blade assembly structure with a large arc-shaped foil and odd-numbered staggered blades according to claim 1, characterized in that: The edges of both the outer and inner ring cutting edges are treated with large chamfering.

5. The razor blade assembly structure with a large arc-shaped foil and odd-numbered staggered blades according to claim 1, characterized in that: The blade mesh has an inner mesh and an outer mesh, and both the inner mesh and the outer mesh are provided with bow-shaped entry grooves.

6. The razor blade assembly structure with a large arc-shaped foil and odd-numbered staggered blades according to claim 5, characterized in that: One side wall of the feed groove is an arc-shaped structure, and the other side wall is one of a straight structure, an inwardly concave arc-shaped structure, an outwardly convex arc-shaped structure, or an arc-shaped structure.

7. The razor blade assembly structure with a large arc-shaped foil and odd-numbered staggered blades according to claim 5, characterized in that: The feed slots of the inner network and the feed slots of the outer network are arranged in a staggered and oblique manner.

8. The razor blade assembly structure with a large arc-shaped foil and odd-numbered staggered blades according to claim 7, characterized in that: The spacing between the feed grooves of the inner mesh is greater than the spacing between the feed grooves of the outer mesh.

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