Static cutter and shaving cutter head with same

Abstract

A static cutter comprises a blade body, a static cutter tooth part is formed on the edge of at least one side of the blade body, working grooves are formed in the static cutter tooth part and the upper end face and the lower end face of the blade body, the working grooves are provided with cutting working faces lower than the upper end face and the lower end face of the blade body, and the thickness of the static cutter tooth part is larger than the thickness between the cutting working faces. A plurality of static cutter tooth parts are arranged on the blade body, tooth protrusions are formed on the static cutter tooth parts, the sectional area of the tooth protrusions is 0.16-0.3 mm, the static cutter tooth parts are arranged on the edge of at least one side of the blade body at equal intervals, tooth grooves are formed between the adjacent static cutter tooth parts, and after the static cutter is assembled on the razor, the movable cutter tooth parts of a movable cutter in the razor extend into the working grooves to be attached to the cutting working face. And the cutting of the tooth part of the movable cutter is limited by the groove walls on the two sides of the cutting working surface, so that the stability and the accuracy in the shaving process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hair cutting equipment, in particular to a static knife and a shaving head with the static knife. Background Art

[0002] In the prior art, shaving heads often have problems such as uneven shaving effect, low shaving efficiency, and pain during shaving during use. Summary of the Invention

[0003] In view of this, the utility model provides a stationary blade and a shaving head having the stationary blade.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A stationary knife comprises a blade body, wherein a stationary knife tooth portion is formed on at least one side edge of the blade body, and working grooves are formed on the stationary knife tooth portion and the upper and lower end surfaces of the blade body, and the working groove has a cutting working surface lower than the upper and lower end surfaces of the blade body, so that the thickness of the stationary knife tooth portion is greater than the thickness between the cutting working surfaces, and tooth protrusions are formed on the stationary knife tooth portion, and the cross-sectional area of ​​the tooth protrusions is 0.16-0.3mm². The stationary knife teeth are arranged at equal intervals on at least one side edge of the blade body, and tooth grooves are formed between adjacent stationary knife teeth.

[0006] Preferably, the tooth groove extends toward the cutting working surface, and the tooth protrusion is formed at an end of the static blade tooth portion away from the blade body.

[0007] Preferably, both side end surfaces of the tooth protrusion are flush with the side wall of the stationary blade tooth portion adjacent to the tooth protrusion, or at least one side of the tooth protrusion exceeds the side wall of the stationary blade tooth portion adjacent to the side end surface.

[0008] Preferably, chamfer R1 and chamfer R2 are set between the tooth protrusion and the cutting working surface, the chamfer R1 is larger than the chamfer R2, the chamfer R1 ≥ 0.2mm, the chamfer R2 ≥ 0.05mm, and the distance between the end of the chamfer R2 away from the chamfer R1 and the end face of the tooth protrusion away from the blade body is D, and D ≥ 0.15mm.

[0009] Preferably, a transition slope is provided between the chamfer R1 and the chamfer R2, and two ends of the transition slope are tangent to the chamfer R1 and the chamfer R2 respectively.

[0010] A shaving razor head includes a guide bar, a movable blade assembly, and a stationary blade. The guide bar is fixed to the blade body of the stationary blade. The movable blade assembly is arranged on the guide bar. The movable blade assembly reciprocates along the guide bar. The movable blade assembly has a movable blade tooth portion. The movable blade tooth portion extends into a working groove and fits into a cutting working surface. The groove wall of the working groove guides and limits the movement of the movable blade tooth portion in the working groove.

[0011] Preferably, an elastic member is provided on the movable knife assembly, and the elastic member has a movable knife pressing portion and a fixing portion, the movable knife pressing portion is provided on both sides of the fixing portion, the two ends of the fixing portion are connected and fixed to the guide bar, and the movable knife pressing portion presses the movable knife.

[0012] Preferably, a fixing plate is provided between the elastic member and the guide bar, the fixing portion of the elastic member is fixedly connected to the bottom of the fixing plate, and both ends of the fixing plate are fixedly connected to the guide bar.

[0013] The beneficial effect of this utility model lies in that the working groove is formed by grinding. When the static blade is assembled on the shaver, the moving blade's teeth extend into the working groove and mate with the cutting surface. The groove walls on both sides of the cutting surface limit the cutting position of the moving blade teeth, thereby ensuring stability and precision during shaving. The convex design of the static blade teeth not only enhances the engagement between the static and moving blades, but also cleverly guides hairs into the optimal cutting position, effectively reducing missed shavings and hair pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Attachment Figure 1 Schematic diagram of the static knife structure;

[0016] Attachment Figure 2 It is a cross-sectional view of the tooth convex;

[0017] Attachment Figure 3 Schematic diagram of hair and shaving head cutting;

[0018] Attachment Figure 4 This is a schematic diagram of a shaving head;

[0019] Attachment Figure 5 Schematic diagram of a shaving head according to another embodiment. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] The utility model provides the following technical solutions:

[0023] As attached Figure 1-5 As shown, the utility model discloses a stationary razor blade, comprising a blade body 1. A stationary blade tooth portion 2 is formed on at least one side edge of the blade body 1. A working groove 5 is formed between the stationary blade tooth portion 2 and both the upper end surface 3 and the lower end surface 4 of the blade body 1. The working groove 5 has a cutting surface 6 that is lower than the upper end surface 3 and the lower end surface 4 of the blade body 1, so that the thickness of the stationary blade tooth portion 2 is greater than the thickness between the cutting surfaces 6. Furthermore, tooth protrusions 7 are formed on the stationary blade tooth portion 2. Specifically, in this design, the working groove 5 is formed by grinding. When the stationary blade is assembled into a razor, the teeth of the movable blade in the razor extend into the working groove 5 and mate with the cutting surface 6. The groove walls on both sides of the cutting surface 6 limit the cutting action of the movable blade teeth, thereby ensuring stability and precision during shaving. The tooth protrusions 7 on the stationary blade tooth portion 2 not only enhance the engagement between the stationary blade and the movable blade, but also cleverly guide hair into the optimal cutting position, effectively reducing missed shaving and hair pulling.

[0024] Furthermore, the cross-sectional area of ​​the tooth protrusion 7 is 0.16-0.3 mm². Specifically, in this embodiment, the cross-sectional area of ​​the tooth protrusion 7 is designed to be between 0.16 and 0.3 square millimeters. This size selection can make the tooth protrusion 7 have a protective effect, preventing the tooth protrusion 7 from being too sharp and causing harm to the user, and can also reduce the blocking effect on the hair, thereby improving the shaving efficiency, and ensuring that the tooth protrusion can effectively cut into the material during the cutting process, reducing resistance and increasing the cutting speed; at the same time, it ensures the strength and durability of the tooth protrusion, preventing wear or breakage under long-term or high-intensity operation.

[0025] Furthermore, the static blade teeth 2 are arranged in a number of evenly spaced groups on at least one side edge of the blade body 1. Tooth grooves 8 are formed between adjacent static blade teeth 2, extending toward the cutting surface 6. The tooth protrusions 7 are formed at the end of the static blade teeth 2 facing away from the blade body 1. Specifically, in this embodiment, the evenly spaced arrangement of the static blade teeth 2 not only optimizes force distribution during the cutting process, allowing each tooth protrusion 7 to evenly bear the cutting load, but also enhances the overall stability and balance of the blade. This layout effectively prevents blade deformation or damage caused by excessive localized force, thereby extending the tool's service life. Furthermore, the extension of the tooth grooves 8 toward the cutting surface 6 provides a smooth discharge channel for material debris during the cutting process. As cutting progresses, hair is gradually peeled off, and the resulting debris can be quickly discharged through the tooth grooves 8, preventing debris from accumulating around the blade. This, in turn, reduces cutting resistance and blade wear, improving cutting efficiency and quality.

[0026] Furthermore, the end faces of the tooth protrusion 7 are flush with the walls of the tooth grooves 8 adjacent to the tooth protrusion 7. Specifically, in this embodiment, the flushness of the end faces of the tooth protrusion 7 with the walls of the tooth grooves 8 adjacent to the tooth protrusion 7 ensures the stability and precision of the static blade during operation. This design not only increases the contact area between the static blade teeth 2 and the workpiece, but also optimizes the force distribution during cutting, resulting in smoother and more efficient cutting.

[0027] In another embodiment, one side end face of the tooth protrusion 7 is flush with the wall of the adjacent tooth groove 8, while the other side end face of the tooth protrusion 7 extends beyond the wall of the adjacent tooth groove 8. Specifically, in this embodiment, the other side end face of the tooth protrusion 7 extends beyond the wall of the adjacent tooth groove 8. This structure acts as a barrier during hair removal, preventing cut hairs from being re-entered into the cutting area, further improving shaving effectiveness and efficiency. Furthermore, this design enhances the guidance of the static blade teeth during the cutting process, allowing hairs to be cut more smoothly along the predetermined path, reducing resistance and friction during the cutting process, and thus extending the tool's service life.

[0028] Furthermore, chamfers R1 and R2 are provided between the tooth protrusion 7 and the cutting working surface 6, wherein the chamfer R1 is greater than the chamfer R2, the chamfer R1 ≥ 0.2 mm, the chamfer R2 ≥ 0.05 mm, and the distance between the end of the chamfer R2 away from the chamfer R1 and the end face of the tooth protrusion 7 away from the blade body 1 is D, wherein D ≥ 0.15 mm. The size of D ensures that the tooth protrusion 7 will not be too sharp when in contact with the skin. Specifically, by providing chamfers R1 and R2, the tactile feel of the tooth protrusion 7 when in contact with the skin can be improved, and it helps to reduce friction and resistance during the cutting process, making the cutting action smoother and more efficient. The design of the larger chamfer R1 is intended to provide sufficient guiding space for the main cutting path, ensure the accuracy and stability of the cutting, while reducing the impact force caused by direct impact, and protecting the skin from unnecessary damage. Although the chamfer R2 is relatively small, it adjusts the transition area between the tooth protrusion 7 and the cutting working surface 6, further optimizing the cutting experience, making the cutting edge smoother, and reducing subsequent finishing work. Moreover, the design that the chamfer R1 is larger than the chamfer R2 enables the hair to slide out smoothly, preventing the hair from getting stuck during the cutting process, thereby improving the overall efficiency and comfort of use.

[0029] Furthermore, a transition bevel 9 is provided between chamfers R1 and R2, with its ends tangent to chamfers R1 and R2, respectively. Specifically, in this embodiment, the provision of transition bevel 9 facilitates the guidance of tangled hairs into the tooth grooves 8, further enhancing the smoothness and efficiency of the static blade in hair processing. The design of transition bevel 9 not only optimizes the hair flow path but also reduces the likelihood of hair accumulation between the tooth protrusions 7 and the cutting surface 6, thereby avoiding problems such as poor cutting or blade damage caused by hair blockage.

[0030] Reference Attachment Figure 3-5 A shaving razor head includes a guide bar 10, a movable blade assembly 11, and the aforementioned stationary blade. The guide bar 10 is fixed to the blade body 1 of the stationary blade. The movable blade assembly 11 is disposed on the guide bar 10 and reciprocates along the guide bar 10. The movable blade assembly 11 has movable blade teeth 18 that extend into the working groove 5 and engage with the cutting surface 6. The walls of the working groove 5 guide and limit the movement of the movable blade teeth 18 within the working groove 5. Specifically, in this embodiment, the movable blade assembly 11 comprises a movable blade 16 and a movable blade holder 17. The movable blade 16 is fixed to the guide bar 10 via an elastic member 12 to ensure flexible reciprocating motion along the guide bar 10. The movable blade 16 has movable blade teeth 18 that correspond to the cutting surface 6 and tooth protrusions 7 of the stationary blade teeth 2, forming an effective shearing area.

[0031] Specifically, in this design, the flatness of the cutting working surface 6 that fits with the movable knife assembly 11 is 0.2°, which can prevent the friction resistance from increasing when the movable knife swings back and forth along the stationary knife, causing the temperature rise of the stationary knife and the movable knife to increase, causing the user to feel a burning sensation and even burn the skin.

[0032] Furthermore, an elastic member 12 is provided on the movable blade assembly 11. The elastic member 12 has a movable blade pressing portion 13 and a fixing portion 14. The movable blade pressing portion 13 is provided on both sides of the fixing portion 14. Both ends of the fixing portion 14 are connected and fixed to the guide bar 10. The movable blade pressing portion 13 presses the movable blade. Specifically, in this embodiment, in order to ensure that the movable blade 16 can always fit with the static blade, the elastic member 12 is made of a highly elastic stainless steel sheet. Its design not only ensures sufficient rebound force but also maintains a stable shape during long-term use. The movable blade pressing portion 13 is designed to be arc-shaped, fitting tightly against the back of the movable blade 16, ensuring that the movable blade will not deviate or shake during reciprocating motion, thereby improving the accuracy and efficiency of shaving. In addition, the curvature of the movable blade pressing portion 13 has been carefully calculated, which can not only effectively press the movable blade, but also reduce the friction resistance caused by excessive pressing, thereby extending the service life of the movable blade and the entire shaving head.

[0033] Furthermore, a fixing plate 15 is provided between the elastic member 12 and the guide bar 10. The fixing portion 14 of the elastic member 12 is fixedly connected to the bottom of the fixing plate 15, and both ends of the fixing plate 15 are fixedly connected to the guide bar 10. Specifically, in this embodiment, the design of the fixing plate 15 firmly connects the elastic member 12 to the guide bar 10, ensuring the stability and reliability of the entire movable knife assembly 11 during high-speed reciprocating motion.

[0034] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stationary blade, comprising a blade body (1), wherein at least one side edge of the blade body (1) forms a stationary blade tooth portion (2), characterized in that: Working grooves (5) are formed on the upper end surface (3) and the lower end surface (4) of the blade body (1) on the stationary blade tooth portion (2). The working groove (5) has a cutting working surface (6) lower than the upper end surface (3) and the lower end surface (4) of the blade body (1), so that the thickness of the stationary blade tooth portion (2) is greater than the thickness between the cutting working surfaces (6), and tooth protrusions (7) are formed on the stationary blade tooth portion (2). The cross-sectional area of ​​the tooth protrusions (7) is 0.16-0.3 mm². The stationary blade tooth portions (2) are arranged at equal intervals on at least one side edge of the blade body (1), and tooth grooves (8) are formed between adjacent stationary blade tooth portions (2).

2. The stationary knife according to claim 1, characterized in that: The tooth groove (8) extends toward the cutting working surface (6), and the tooth protrusion (7) is formed at an end of the stationary blade tooth portion (2) away from the blade body (1).

3. The stationary knife according to claim 2, characterized in that: The two side end faces of the tooth protrusion (7) are flush with the side wall of the stationary blade tooth portion (2) adjacent to the tooth protrusion (7), or at least one side of the tooth protrusion (7) extends beyond the side wall of the stationary blade tooth portion (2) adjacent to the side end face.

4. The stationary knife according to claim 1, characterized in that: A chamfer R1 and a chamfer R2 are provided between the tooth protrusion (7) and the cutting working surface (6), wherein the chamfer R1 is larger than the chamfer R2, wherein the chamfer R1 is ≥ 0.2 mm, and the chamfer R2 is ≥ 0.05 mm, and the distance between the end of the chamfer R2 away from the chamfer R1 and the end face of the tooth protrusion (7) away from the blade body (1) is D, wherein D is ≥ 0.15 mm.

5. The stationary knife according to claim 4, characterized in that: A transition slope (9) is provided between the chamfer R1 and the chamfer R2, and two ends of the transition slope (9) are tangent to the chamfer R1 and the chamfer R2 respectively.

6. A shaving head, characterized in that: The invention comprises a guide bar (10) and a movable knife assembly (11) and a stationary knife according to any one of claims 1 to 5, wherein the guide bar (10) is fixed on the blade body (1) of the stationary knife, the movable knife assembly (11) is arranged on the guide bar (10), the movable knife assembly (11) reciprocates along the guide bar (10), the movable knife assembly (11) has a movable knife tooth portion (18), the movable knife tooth portion (18) extends into the working groove (5) and fits with the cutting working surface (6), and the groove wall of the working groove (5) guides and limits the movement of the movable knife tooth portion (18) in the working groove (5).

7. The shaving head according to claim 6, characterized in that: An elastic member (12) is provided on the movable knife assembly (11), and the elastic member (12) has a movable knife pressing portion (13) and a fixing portion (14). The movable knife pressing portion (13) is provided on both sides of the fixing portion (14), and both ends of the fixing portion (14) are connected and fixed to the guide bar (10). The movable knife pressing portion (13) presses the movable knife.

8. The shaving head according to claim 7, characterized in that: A fixing plate (15) is provided between the elastic member (12) and the guide bar (10), the fixing portion (14) of the elastic member (12) is fixedly connected to the bottom of the fixing plate (15), and both ends of the fixing plate (15) are fixedly connected to the guide bar (10).

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