CN110815296A - A shaving fixed knife and a shaver - Google Patents

Abstract

The invention relates to a fixed shaving knife and a shaving device, which mainly solve the technical problems that the teeth of the existing fixed shaving knife are sharp, which are easy to pierce the skin and have potential safety hazards; The thickness H ₁ of the end of the cutter tooth is greater than the thickness H of the end of the cutter tooth, and the end face of the end of the cutter tooth is provided with a circular arc chamfer. The beneficial effect of the present invention is to increase the thickness of the end portion of the cutter tooth, so that the end portion of the cutter tooth can be chamfered with a circular arc, and the end portion of the cutter tooth is prevented from forming sharp teeth. When in use, the smooth end of the teeth can effectively prevent the ends of the teeth from being too sharp and pierce the skin or scalp, thereby effectively improving the safety of the shaving fixed knife, and the arc-shaped teeth The end can greatly improve the use comfort of the shaving fixed knife, improve the user experience, and is especially suitable for infant haircuts or medical surgery and trauma treatment.

Description

A shaving fixed knife and a shaver

technical field

The invention relates to a shaving head, in particular to a shaving fixed knife and a shaving device, which are mainly used in the field of hair trimming tools.

Background technique

There are two main types of shaving heads, one is the reciprocating type, that is, the moving blade swings horizontally along the static blade to achieve hair shaving; The shaving of hair is realized by the rotation of the moving knife driven by the motor.

The existing reciprocating shaving head mainly includes a fixed knife and a moving knife. The moving knife and the fixed knife are respectively provided with knife teeth, and a hair guide groove is provided between the adjacent knife teeth. Entering into the hair guiding groove, the movable knife swings horizontally reciprocatingly along the fixed knife under the driving of the driving mechanism to cut the hair entering the hair guiding groove, so as to realize the hair shaving effect. In the production process, in order to ensure the hair shaving effect, the length of the hair root should be shortened as much as possible. Puncture the human skin or scalp, causing human injury, poor safety and comfort.

SUMMARY OF THE INVENTION

In order to solve the above technical problems; the present invention provides a shaving fixed knife and a shaver, which can effectively avoid the formation of sharp teeth on the end of the fixed knife, prevent the human skin or scalp from being pierced during use, and ensure the safety during use. sex and comfort; moreover, easy to produce and process,

In order to solve the above technical problems, the technical solution adopted by the present invention is a shaving fixed knife, which includes a body, a plurality of cutter teeth are arranged at one end of the body, and a hair guide groove is arranged between two adjacent cutter teeth; It is characterized in that the thickness H ₁ of the end of the cutter tooth is greater than the thickness H of the end of the cutter tooth, and the end face of the end of the cutter tooth is provided with a circular arc chamfer.

Further, a folded portion is provided at the end of the knife tooth, and the folded portion and the knife tooth have an integral structure and fit with the knife tooth so that the thickness H1 of the knife tooth end is greater than the thickness H _of the knife tooth end; The connection between the folding part and the blade teeth and the bending part are respectively provided with arc angles, so that the end face of the end of the blade teeth is arc-shaped.

Further, the folded part is in contact with the upper end surface of the blade teeth, and the length L of the folded part is greater than or equal to half of the thickness H of the end of the blade teeth, and less than or equal to 3mm.

Further, the folded part is in contact with the lower end surface of the blade teeth, and the length L of the folded part is greater than or equal to half of the thickness H of the end of the blade teeth, and less than or equal to 3mm.

On the basis of the folded part, the applicant has also proposed another technical solution different from the folded part in combination with the actual production and use of the shaving head, the structure of which is as follows: A bending part is provided, the height M of the bending part is 0.25 times to 2 times the thickness H of the tip of the blade, and the end of the bending part is arc-shaped.

Further, the bending part and the cutting surface of the blade teeth are inclined, and the inclination angle a is between >90°～≤150°.

Further, an inner arc angle R and an outer arc angle R ₁ are set at the connection between the bending portion and the cutter teeth, and the radius of the inner arc angle R is smaller than the radius of the outer arc angle R ₁ .

Further, the radius of the inner arc angle R is greater than or equal to half of the thickness H of the end of the cutter tooth, and less than or equal to the thickness H of the end of the cutter tooth.

Further, the bending portion is bent toward the upper end face or the bottom end face of the cutter teeth.

On the basis of the fixed shaving knife, the applicant also proposes a technical solution for a shaver that can effectively prevent the teeth of the fixed knife from stabbing the skin or scalp, which is characterized in that it includes any one of claims 1-9. The shaving knife described in item.

The beneficial effect of the present invention is to increase the thickness of the end portion of the cutter tooth, so that the end portion of the cutter tooth can be chamfered with a circular arc, and the end portion of the cutter tooth is prevented from forming sharp teeth. When in use, the smooth end of the teeth can effectively prevent the ends of the teeth from being too sharp and pierce the skin or scalp, thereby effectively improving the safety of the shaving fixed knife, and the arc-shaped teeth The end can greatly improve the use comfort of the shaving fixed knife and improve the user experience.

The shaver adopting the shaving fixed knife in this technical solution can use the folded part or the bent part with the smooth chamfered end face to protect the user's skin or scalp during use, so as to effectively avoid the shaving during use. The sharp teeth of the fixed shaving knife stab the user, which improves the safety and comfort of use of the shaver, and is especially suitable for infant haircuts or medical operations and trauma treatment.

Description of drawings

FIG. 1 is a three-dimensional structural view of a cutter head assembly of a shaver according to an embodiment of the present invention.

Fig. 2 is a three-dimensional structural view of a shaving fixed knife in an embodiment of the present invention

3 is a cross-sectional structural view of a folded portion of a shaving stator in an embodiment of the present invention

4 is a cross-sectional structural view of a folded portion of a shaving stator in an embodiment of the present invention

FIG. 5 is a three-dimensional structural view of a fixed shaving knife with a bent portion according to an embodiment of the present invention.

FIG. 6 is a cross-sectional structural view of a fixed shaving knife with a bent portion according to an embodiment of the present invention.

FIG. 7 is a cross-sectional structural view of a fixed shaving knife with a bent portion in an embodiment of the present invention.

Detailed ways

The embodiments of the present invention will be further described below in conjunction with the accompanying drawings;

As shown in Figures 1-7, the present invention is a shaving fixed knife, comprising a main body 1, a plurality of cutter teeth 2 are arranged at one end of the main body 1, and a hair guide groove is arranged between two adjacent cutter teeth 2 3. The thickness H1 of the end of the cutter tooth ₂ is greater than the thickness H of the end of the cutter tooth 2, and the end face of the end of the cutter tooth 2 is provided with an arc chamfer. The thickness of the existing fixed shaving knives is basically less than 0.5mm. Due to the thin thickness, it is impossible to smooth the ends of the knife teeth 2, so that the ends of the knife teeth 2 form very sharp tines. It is easy to pierce the skin or scalp, posing a safety hazard. However, increasing the thickness of the end of the cutter teeth 2 avoids the cost increase caused by the increase of the overall material thickness of the shaving fixed knife. The arc chamfering treatment avoids the formation of sharp teeth at the ends of the cutter teeth 2, which relatively reduces the material cost. During use, the smooth ends of the teeth 2 can effectively prevent the ends of the teeth 2 from being too sharp and pierce the skin or scalp, thereby effectively improving the safety of the shaving fixed knife, and the arc-shaped The 2 ends of the blade teeth can greatly improve the use comfort of the fixed shaving blade and improve the user experience.

In this embodiment, in order to increase the thickness of the end of the cutter teeth 2, the ends of the cutter teeth 2 can be chamfered with an arc to prevent the ends of the cutter teeth 2 from being too sharp and piercing the skin or scalp. The end of the blade teeth 2 is provided with a folding part 4, and the folding part 4 and the blade teeth 2 have an integral structure and fit with the blade teeth 2 so that the thickness H ₁ of the end of the blade teeth 2 is greater than the thickness H of the end of the blade teeth 2; A circular arc angle is respectively provided at the connection and the bending place of the folded portion 4 and the blade teeth 2 so that the end faces of the ends of the blade teeth 2 form arc transitions. By adding a folded part 4 at the end of the blade 2, and making the folded part 4 fit with the blade 2, the thickness of the end of the blade 2 is relatively increased, so that the thickness H1 of the end of the blade ₂ is greater than The thickness H of the end of the cutter tooth 2, when the thickness of the end of the cutter tooth 2 increases, the end face of the cutter tooth 2 can be rounded to form a non-sharp smooth tooth at the end of the cutter tooth 2. When the shaving blade is set, the ends of the blade teeth 2 can be effectively prevented from being too sharp to pierce the skin or the scalp, thereby improving the use safety and use comfort of the shaving fixed blade.

In this embodiment, in order to facilitate the production and processing of the folded portion 4 and ensure the shaving effect, the folded portion 4 is in contact with the upper end surface of the cutter teeth 2, and the length L of the folded portion 4 is greater than or equal to the thickness of the end of the cutter teeth 2. half of H and less than or equal to 3mm. The upper end face of the blade teeth 2 is the cutting surface that cooperates with the shaving movable knife, and the folded part 4 is attached to the upper end face of the blade teeth 2, so that the bottom end face of the shaving fixed blade is flat, and when shaving, then Maximum control of the length of the hair root to enhance the shaving effect. Of course, if the folding part 4 is arranged on the upper end surface of the blade teeth 2, the blade teeth of the movable blade must be moved backward to avoid the interference between the movable blade teeth and the folding part 4, so that the relatively shortened blade teeth of the movable blade and the lead The overlapping area of the groove 3 relatively reduces the amount of hair entering the hair guide groove 3 when shaving, and reduces the shaving effect; for this reason, the length of the hair guide groove 3 must be correspondingly lengthened to ensure the entry. Hair volume and shaving effect. The shortest setting of the length L of the folded part 4 to be greater than or equal to half of the thickness H of the end of the blade 2 is mainly to facilitate folding. If it is too short, it cannot be folded, and it cannot increase the thickness of the blade 2 Therefore, the maximum length L of the folded part 4 is limited to be less than or equal to 3 mm, which is to facilitate the folding and also facilitate the arc chamfering of the ends of the teeth 2 to ensure the smoothness of the ends of the teeth 2. , to improve the safety and comfort of the shaving knife. The preferred length L of the folded portion 4 is twice the thickness H of the end of the blade 2, and is set to be twice the thickness of the end of the blade 2, which not only facilitates folding and increases the thickness H ₁ of the end of the blade 2, but also saves materials. ,reduce manufacturing cost.

In this embodiment, in order to facilitate the production and processing of the folded portion 4 and the shaving effect, the folded portion 4 is in contact with the lower end surface of the cutter teeth 2, and the length L of the folded portion 4 is greater than or equal to the thickness H of the end of the cutter teeth 2 half and less than or equal to 3mm. The lower end face of the blade teeth 2 refers to the side where the fixed shaving blade is in contact with the skin surface or the scalp, and the folded part 4 is attached to the lower end of the blade teeth 2, so that the length of the hair guiding groove 3 can be shortened and the blade can be lifted. The strength of the teeth 2 can prevent the teeth 2 from being too long to be bent or twisted during use, prolong the service life of the shaving fixed knife and ensure the shaving effect. The shortest setting of the length L of the folded part 4 to be greater than or equal to half of the thickness H of the end of the blade 2 is mainly to facilitate folding. If it is too short, it cannot be folded, and it cannot increase the thickness of the blade 2 Therefore, the maximum length L of the folded part 4 is limited to be less than or equal to 3 mm, which is to facilitate the folding and also facilitate the arc chamfering of the ends of the teeth 2 to ensure the smoothness of the ends of the teeth 2. , to improve the safety and comfort of the shaving knife. The preferred length L of the folding portion 4 is twice the thickness H of the end of the blade 2, and is set to be twice the thickness of the end of the blade 2, which not only facilitates folding and facilitates production and processing, but also saves materials and reduces production costs.

On the basis that the folded part 4 increases the thickness of the ends of the teeth 2 to facilitate the arc chamfering of the ends of the teeth 2, the applicant also proposes a different method based on the actual production and use of shaving heads Another technical solution of the folding part 4 is as follows: a bending part 5 is provided at the end of the blade tooth 2, and the height M of the bending part 5 is 0.25 times the thickness H of the end of the blade tooth 2~ 2 times, and the end of the bent portion 5 is arc-shaped. By adding the bending part 5 at the end of the blade tooth 2, the purpose of increasing the thickness of the end part of the blade tooth 2 can also be achieved. The arc chamfering treatment can also form a non-sharp and smooth transition on the end face of the blade teeth 2, which can effectively prevent the ends of the blade teeth 2 from being too sharp and pierce the skin or scalp during use, thereby improving the shaving performance. The safety and comfort of using the fixed knife. The height M of the bending portion 5 is limited to 0.25 to 2 times the thickness H of the end of the cutter teeth 2, so that the thickness of the cutter teeth 2 can be increased for the convenience of bending, and the material can be saved to the greatest extent, and the production cost can be reduced. The height M of the bending part 5 is preferably 1 times, that is, the height M of the bending part 5 is the same as the thickness H of the end of the cutter teeth 2. Setting it to 1 times can not only facilitate the bending process, but also save materials and reduce production. cost.

In this embodiment, in order to prevent the phenomenon of hair snagging (hair snagging) during use, the cutting surface of the bending portion 5 and the cutter teeth 2 is inclined, and the inclination angle a is >90°～≤150° ° between. The bending part 5 is set to be inclined, which can maximize the gap between the bending part 5 and the end face of the blade 2, thereby effectively preventing the hair from getting stuck or hooking at the corner of the bending part 5, thereby improving the fixed position. Safety and comfort of knife use. And set the bending angle a of the bending part 5 between >90° to ≤150°, preferably 110°, and set it to 110°, so that the gap between the bending part 5 and the plane of the cutter teeth 2 is large, and the hair Then, it is not easy to be stuck or hooked at the joint between the bending part 5 and the plane of the blade teeth 2, so as to ensure the comfort of shaving. Of course, it can also be set to 90° or less than 90°, but this relatively narrows the gap between the junction of the bending portion 5 and the plane of the cutter teeth 2, which is easy to cause jamming or hooking. Therefore, the implementation of this embodiment is preferred. implementation.

In this embodiment, in order to prevent hair from being caught or snagged, an inner arc angle R and an outer arc angle R ₁ are set at the connection between the bending portion 5 and the cutter teeth 2 , and the radius of the inner arc angle R is less _than the radius of the outer arc angle R1. By setting the inner arc angle R and the outer arc angle R ₁ at the connection between the bending part 5 and the cutter tooth 2 , and making the radius of the inner arc angle R smaller than the radius of the outer arc angle R ₁ , the bending part 5 and the cutter tooth The connection of 2 forms an arc transition inside and outside. The inner arc angle R can prevent hair from sticking or snagging, improving the comfort of using the fixed shaving knife, while the outer arc angle R ₁ can prevent the blade teeth. 2. The effect of piercing the skin or scalp to improve the safety of the shaving head. In the production process of the conventional bending process, the wall thickness of the 5 parts to be bent is the same. Since the thickness of the shaving fixed knife is relatively thin, if the conventional bending process is used to manufacture the bending part 5, the two ends of the blade teeth will have the same thickness. The bending part 5 of the lower part has poor strength and is prone to breakage or deformation, which shortens the service life of the shaving blade. Therefore, the technical solution is to use a customized bending die to make the bending part 5, so that the radius of the inner arc angle R of the bending part 5 is smaller _than the radius of the outer arc angle R1, and the wall of the bending part 5 is bent. The thickness is greater than the thickness of the blade teeth 2 and the bending part 5 , which can increase the strength of the bending part 5 and prolong the service life of the bending part 5 .

In this embodiment, in order to avoid the phenomenon of catching or snagging at the joint of the bending portion 5 and the cutter tooth 2 to the greatest extent, the radius of the inner arc angle R is greater than or equal to half of the thickness H of the end of the cutter tooth 2, and less than or equal to the thickness H at the end of the tooth 2. By increasing the radius of the inner arc angle R, the gap between the junction of the bending portion 5 and the cutter teeth 2 can be increased to the greatest extent, which can effectively prevent the hair from being caught or snared, and improve the comfort of shaving. Secondly, the wall thickness of the bending part 5 can be increased to the greatest extent, and the strength of the bending part 5 can be improved by this, so as to prevent the bending part 5 from breaking during use, and prolong the life of the shaving fixed knife. service life. In the actual production process, the radius of the inner arc angle R is the same as the thickness of the end of the tooth 2.

In this embodiment, in order to meet user requirements or personalized customization, the bending portion 5 is formed by bending toward the upper end face or the bottom end face of the cutter teeth 2 . In the actual production process, the bending part 5 can be bent toward the cutting surface of the cutter teeth 2, or it can be bent toward the end face of the cutter teeth 2 relative to the cutting surface. As long as the end of the bending part 5 and the bending part of the bending part 5 do not cause damage to the skin.

On the basis of the shaving fixed knife, the applicant also proposes a shaver that can prevent piercing of the skin or scalp, and has high safety and comfort in use. The shaver includes claims 1-9. The shaving fixed knife of any one. Using the shaving fixed blade of the above technical solution on the shaver, the folded part 4 or the folded part 5 with a smooth and chamfered end face can be used to protect the user's skin or scalp during use, thereby effectively avoiding the use of During the process, the user is stabbed due to the sharp teeth 2 of the fixed shaving knife. The shaver adopting the above shaving fixed knife is especially suitable for use in the treatment of infants' haircuts or medical operations and trauma.

The above embodiments should not be regarded as a limitation of the present invention, but any improvements made based on the spirit of the present invention should fall within the protection scope of the present invention.

Claims (10)

1. a hair shaving fixed knife, comprising a body, one end of the body is provided with a plurality of cutter teeth, and a hair-guiding groove is provided between two adjacent cutter teeth; it is characterized in that the thickness H of the end of the cutter teeth ₁ is greater than the thickness H of the end of the cutter tooth, and the end face of the end of the cutter tooth is provided with an arc chamfer. 2 . The fixed shaving knife according to claim 1 , wherein a folding part is provided at the end of the blade teeth, and the folding part and the blade teeth have an integral structure and are fitted with the blade teeth to make the blade. 3 . The thickness H1 of the tooth end is greater than the thickness H _of the end of the tooth; arc chamfers are respectively provided at the connection and the bending part of the folded part and the tooth so that the end face of the end of the tooth forms an arc transition. 3. A shaving fixed knife according to claim 2, characterized in that the folded part is in contact with the upper end face of the blade teeth, and the length L of the folded part is greater than or equal to half of the thickness H of the end of the blade teeth, and Less than or equal to 3mm. 4. A shaving fixed knife according to claim 2, characterized in that the folded part is in contact with the lower end face of the blade teeth, and the length L of the folded part is greater than or equal to half of the thickness H of the end of the blade teeth, and Less than or equal to 3mm. 5. A shaving fixed knife according to claim 1, characterized in that a bending part is provided at the end of the blade teeth, and the height M of the bending part is 0.25 times the thickness H of the end of the blade teeth ~ 2 times, and the end of the bent portion is arc-shaped. 6 . The fixed hair shaving knife according to claim 5 , wherein the bending part and the cutting surface of the blade teeth are inclined, and the inclination angle a is between >90° and ≤150°. 7 . 7. A shaving fixed knife according to claim 6, characterized in that the connection between the bending portion and the blade teeth is provided with an inner arc angle R and an outer arc angle R ₁ , and the inner arc angle The radius of R is smaller _than the radius of the outer arc angle R1. 8 . The fixed shaving knife according to claim 7 , wherein the radius of the inner arc angle R is greater than or equal to half of the thickness H of the tip of the blade teeth, and less than or equal to the thickness H of the tip of the blade teeth. 9 . 9 . The fixed hair shaving knife according to claim 8 , wherein the bending portion is bent toward the upper end face or the bottom end face of the blade teeth. 10 . 10. A hair shaver, characterized by comprising the hair shaving fixed knife according to any one of claims 1-9.

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