Trimming blade and hair trimming tool

Abstract

A trimming blade and a hair trimming tool. The trimming blade comprises a blade body (1) and an insert (2); the blade body is suitable for being mounted on a hair trimmer; the insert is connected to the blade body; the insert is suitable for being in frictional contact with a fixed blade or a movable blade; the insert is a ceramic member; one side of the blade body is provided with first blade teeth (11); one side of the insert is provided with second blade teeth (21); the second blade teeth correspond to the first blade teeth; the second blade teeth are suitable for cooperating with the fixed blade or the movable blade to trim hair. The insert is made of a plate-shaped boron carbide ceramic piece or cubic boron nitride piece, and is in direct contact with the fixed blade or the movable blade, thereby achieving lower frictional heating temperature, slow temperature rise, better sharpness and higher wear resistance; the insert performs the functions of contacting with the fixed blade or the movable blade and cutting hair, so that the material selection range for the blade body is wider, that is, a material having lower density can be selected to make the entire blade lighter in weight; the insert is not prone to breaking.

Description

A shaving blade and hair trimming tool Technical Field

[0001] This invention relates to the field of hair trimmer technology, and more specifically, to a trimmer blade and a hair trimming tool. Background Technology

[0002] Hair trimming is primarily accomplished through the interaction of a fixed blade and a moving blade on a hair trimming tool. The fixed blade has multiple fixed teeth spaced apart, and the moving blade has multiple moving teeth spaced apart. The fixed blade is fixed to the hair trimming tool, and the moving blade is in close contact with the fixed blade. Driven by the internal drive mechanism of the hair trimming tool, the moving blade can reciprocate or rotate relative to the fixed blade. At this time, the fixed teeth and moving teeth work together to trim the hair.

[0003] Because the moving and fixed cutting blades are in close contact, they generate heat due to friction as the moving blade moves relative to the fixed blade, causing their surfaces to heat up rapidly. Additionally, the cutting heads are typically made of heavy metal materials, making them quite heavy. Summary of the Invention

[0004] To address at least one of the aforementioned problems, the present invention first provides a trimming blade, comprising a blade body and an insert, wherein the blade body is adapted to be mounted on a hair trimmer, the insert is connected to the blade body, the insert is adapted to rub against a fixed blade or a movable blade, the insert is a ceramic part, a first cutting tooth is provided on one side of the blade body, a second cutting tooth is provided on one side of the insert, the second cutting tooth is correspondingly arranged with the first cutting tooth, and the second cutting tooth is adapted to cooperate with the fixed blade or the movable blade to trim hair.

[0005] Optionally, the insert is a boron carbide ceramic sheet, a cubic boron nitride sheet, or a zirconium oxide sheet.

[0006] Optionally, the thickness of the insert is 0.2mm-0.5mm.

[0007] Optionally, the blade body is made of steel, titanium alloy, silver, aluminum, or plastic.

[0008] Optionally, the second cutting tooth does not protrude beyond the tip of the first cutting tooth, so that when it falls, the tip of the first cutting tooth touches the ground.

[0009] Optionally, the blade body is provided with a mounting groove, and the insert is located in the mounting groove.

[0010] Optionally, the second cutting tooth is located in the mounting groove, the tip of the second cutting tooth is spaced apart from the tip of the first cutting tooth, and the upper surface of the first cutting tooth is in contact with the lower surface of the second cutting tooth.

[0011] Optionally, the tip of the first cutting tooth is fixedly provided with a protective protrusion, the protective protrusion extends toward the side where the insert is located, the second cutting tooth does not protrude from the mounting groove, and the tip of the second cutting tooth is spaced 0.2mm-0.5mm from the protective protrusion.

[0012] Optionally, the thickness at the tip of the first cutting tooth is 0.5mm-0.8mm, and the width at the tip of the first cutting tooth is 0.5mm-0.8mm.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0014] The insert itself has good wear resistance and a lower coefficient of friction than metal materials. Therefore, when trimming hair, the insert is in direct contact with the fixed or moving blade, which results in a lower temperature when the blade rubs. In addition, the lower coefficient of friction also makes the blade less dependent on lubricating oil and can be used normally in oil-free or low-oil conditions.

[0015] The inserts are made of boron carbide ceramic sheets, cubic boron nitride sheets, or zirconium oxide sheets, which have better sharpness and make hair cutting smoother. The boron carbide ceramic sheets, cubic boron nitride sheets, and zirconium oxide sheets can also be polished during friction, and still have good sharpness after long-term use. At the same time, the boron carbide ceramic sheets, cubic boron nitride sheets, and zirconium oxide sheets do not easily heat up after friction during the inserts.

[0016] Since the insert is responsible for contact with the fixed or moving blade and for cutting hair, the range of materials for the blade body is relatively wide. Compared to steel, when the blade body is made of silver, silver alloy, aluminum, or plastic, the blade body will be lighter, and the trimming tool with the blade will also be lighter.

[0017] The insert is also spaced apart from the trimming end of the blade body. When the blade falls, the trimming end of the blade body touches the ground, while the insert is less likely to directly contact the ground and break, thus improving the service life of the blade and trimming tool.

[0018] The protective protrusion will protect the other side of the insert. When the blade body falls from the side of the protective protrusion away from the bottom of the mounting groove and hits the ground, the protective protrusion will hit the ground. Since there is a certain distance between the second blade tooth and the protective protrusion, this distance can buffer and unload the stress generated during the fall, ensuring that the insert is not damaged during the fall.

[0019] The thickness and width of the first cutting tooth tip are both 0.5mm-0.8mm, which is thicker and stronger than the teeth on existing blades. When the blade body falls, the first cutting tooth is not easy to deform or break, which further improves the service life of the blade body.

[0020] In addition, the present invention provides a hair trimming tool, including the trimming blade as described above.

[0021] Compared to existing technologies, the hair trimming tool described in this invention has the same advantages as the existing technologies mentioned above, and will not be repeated here. Attached Figure Description

[0022] Figure 1 is a structural diagram of the blade body and the insert in an embodiment of the present invention;

[0023] Figure 2 is a top view of the blade body in an embodiment of the present invention;

[0024] Figure 3 is a side view of the blade body and the insert in the mating state in an embodiment of the present invention (the gap between the blade body and the insert in the figure represents the adhesive filling layer).

[0025] Figure 4 is an enlarged view of part A in Figure 3;

[0026] Figure 5 is a comparison of the temperature rise curves of the cutting head made of steel, aluminum, and 925 silver in this embodiment of the invention at 6000 rpm with those of the cutting head in the prior art.

[0027] Explanation of reference numerals in the attached drawings: 1. Blade body; 11. First cutting tooth; 12. Mounting groove; 13. Protective protrusion; 2. Insert; 21. Second cutting tooth. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present application will be further described in detail below with reference to the accompanying drawings 1-5.

[0029] The accompanying drawings of the embodiments of the present invention provide a coordinate system XYZ, wherein the positive direction of the X-axis represents the left, the negative direction of the X-axis represents the right, the positive direction of the Y-axis represents the front, the negative direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom.

[0030] In a first aspect, embodiments of the present invention provide a trimming blade. Referring to FIG1, the trimming blade includes a blade body 1 and an insert 2. The blade body 1 is adapted to be mounted on a hair trimmer, and the insert 2 is connected to the blade body 1. The insert 2 is adapted to rub against a fixed blade or a moving blade to reduce the heat generated during friction. The insert 2 is a ceramic part or a cubic boron nitride part. A first cutting tooth 11 is provided on one side of the blade body 1, and a second cutting tooth 21 is provided on one side of the insert 2. The second cutting tooth 21 corresponds to the first cutting tooth 11 and is adapted to cooperate with the fixed blade or the moving blade to trim hair.

[0031] Insert 2 can be a boron carbide ceramic sheet, a cubic boron nitride sheet, or a zirconia sheet. All three types of ceramics are ceramics. Boron carbide, cubic boron nitride, and zirconia sheets have high hardness and are more wear-resistant. Thinner versions of these materials offer better sharpness and a smoother cut for hair. They also have low coefficients of friction, resulting in lower frictional resistance and increased blade life. Compared to metal materials, they generate less heat after friction. During the reciprocating motion of the blade, the boron carbide, cubic boron nitride, and zirconia sheets are ground, giving the blade a self-sharpening function and ensuring sharpness even after prolonged use. In this embodiment, insert 2 is preferably a zirconia sheet, which is bonded to the blade body 1 with adhesive. In another embodiment, the insert 2 can be glass; in other embodiments, materials with high strength, low coefficient of friction and good sharpness can also be used as insert 2, such as alumina, silicon carbide, tungsten carbide, silicon nitride, aluminum nitride, and boron nitride.

[0032] The thickness of insert 2 is 0.2mm-0.5mm. In this embodiment, the thickness of insert 2 is preferably 0.2mm. Thus, insert 2 will be sharper while ensuring that the temperature rise is slow after friction, that it is more wear-resistant, and that the coefficient of friction is small. At the same time, it saves materials and reduces costs.

[0033] The blade body 1 can be made of steel, titanium alloy, silver, silver alloy, aluminum, or plastic. When the blade body 1 is made of steel, it has higher overall strength and is more wear-resistant. Compared to steel, when the blade body 1 is made of titanium alloy, it is lighter. When the blade body 1 is made of aluminum, it has better heat dissipation and is lighter. Compared to aluminum, when the blade body 1 is made of silver or silver alloy, its heat dissipation is relatively better, while also conveying a sense of prestige to the user. Compared to aluminum, when the blade body 1 is made of plastic, it is lighter and less expensive. In this embodiment, the blade body is preferably made of aluminum.

[0034] The blade body 1 can be a fixed blade or a moving blade. When the blade body 1 is a fixed blade, the insert 2 will rub against the moving blade; when the blade body 1 is a moving blade, the insert 2 will rub against the fixed blade. In this embodiment, the blade body 1 is preferably a fixed blade.

[0035] Referring to Figures 1 and 2, the end of the blade body 1 with the first cutting tooth 11 is the front end of the blade body 1, and the end of the insert 2 with the second cutting tooth 21 is the front end of the insert 2. The front end (tooth tip) of the second cutting tooth 21 does not protrude beyond the front end (tooth tip) of the first cutting tooth 11, and the front ends of the second cutting tooth 21 and the first cutting tooth 11 are spaced apart. When falling, the tooth tip of the first cutting tooth 11 can touch the ground first to protect the insert 2, making the insert 2 less likely to be damaged when the blade falls, thereby improving the service life of the blade body 1. In addition, two adjacent first cutting teeth 11 form a channel for hair to enter, which facilitates the movement of the blade and the second cutting tooth 21 to cut the hair.

[0036] Multiple first cutting teeth 11 are spaced apart; multiple second cutting teeth 21 are also spaced apart. The shape of the second cutting teeth 21 is adapted to the shape of the first cutting teeth 11, and the multiple second cutting teeth 21 correspond one-to-one with the multiple first cutting teeth 11. The upper surface of the first cutting teeth 11 and the lower surface of the second cutting teeth 21 are in contact with each other. This arrangement results in a lower temperature generated by the friction of the first cutting teeth 11.

[0037] Referring to Figures 3 and 4, let the thickness of the thinnest part of the first cutting tooth 11 (i.e., the tip of the first cutting tooth 11) be t; and let the width of the maximum width at the tip of the first cutting tooth 11 be d. Then, 0.5mm≤t≤0.8mm, 0.5mm≤d≤0.8mm. In this embodiment, t=0.6mm and d=0.6mm are preferred. This design makes the first cutting tooth 11 stronger than ordinary teeth, and the first cutting tooth 11 is not easy to deform and break after falling to the ground, thus making the service life of the blade body 1 longer.

[0038] Referring to Figures 3 and 4, and in conjunction with Figure 1, a mounting groove 12 is provided on the side of the blade body 1 near the moving blade. The mounting groove 12 covers the area of ​​multiple first cutting teeth 11, meaning that all the first cutting teeth 11 are located within the mounting groove 12. The insert 2 is bonded to the bottom of the mounting groove 12 with adhesive. Correspondingly, multiple second cutting teeth 21 are located within the mounting groove 12 and do not protrude from it. This ensures that the overall thickness of the blade body 1 after connection with the insert 2 is less different from the original thickness of the blade body 1, thus making it more compatible with existing hair trimming tools.

[0039] The mounting groove 12 extends through the blade body 1 perpendicular to the two side walls (i.e., left and right directions) at the front end of the blade plate 1, making the mounting groove 12 easier to process and providing more space for the insert 2 to be installed; thus, installation is more convenient. After the insert 2 is installed in place, the two sides of the insert 2 perpendicular to the trimming end are filled with flexible fixing adhesive, which forms flexible protection for the opposite sides of the insert 2, making the opposite sides of the insert 2 less likely to break due to collision.

[0040] Referring to Figures 3 and 4, in conjunction with Figure 1, a protective protrusion 13 is integrally formed on the side of the first cutting tooth 11 away from the blade body 1. The protective protrusion 13 is located at the opening of the mounting groove 12 and extends towards the side where the insert 2 is located. The distance from the protective protrusion 13 to the bottom of the mounting groove 12 is greater than the distance from the side of the second cutting tooth 21 away from the bottom of the mounting groove 12 to the bottom of the mounting groove 12; that is, the top surface of the protective protrusion 13 is higher than the thickness of the second cutting tooth 21. When the blade body 1 falls from the side of the protective protrusion 13 away from the bottom of the mounting groove 12 and hits the ground, the protective protrusion 13 will touch the ground to protect the second cutting tooth 21. In another embodiment, the height of the protective protrusion 13 is higher than the thickness of the tip of the cutting tooth on the moving blade, thereby preventing the moving cutting tooth from cutting the skin.

[0041] Furthermore, the end of the second cutting tooth 21 furthest from the insert 2 is spaced apart from the protective protrusion 13. Let the distance between the second cutting tooth 21 and the protective protrusion 13 be L, then 0.2mm ≤ L ≤ 0.5mm. In this embodiment, L = 0.3mm is preferred. Simultaneously, a flexible adhesive that solidifies will fill the space between the second cutting tooth 21 and the protective protrusion 13. This design can buffer and unload the stress generated when the blade body 1 falls, ensuring that the insert 2 is not damaged during the fall and improving the service life of the trimming blade.

[0042] The test results for the cutting head when insert 2 is a zirconia sheet and the blade body 1 is made of aluminum or iron are shown in the table below (cutting head A is when the blade body 1 is made of aluminum, and cutting head B is when the blade body 1 is made of iron):

[0043]

[0044] As shown in the table above, the sharpness of the blade meets the test standards. When the blade body 1 is made of aluminum, the highest temperature of the blade is lower than the highest temperature when the blade body 1 is made of iron.

[0045] The blade body 1 is made of aluminum; the insert 2 is a zirconia sheet. The sharpness and operating current over 1217 hours are shown in the table below:

[0046]

[0047] The blade body 1 is made of iron; the insert 2 is a zirconia sheet. The sharpness and operating current over 1217 hours are shown in the table below:

[0048]

[0049] The two tables above show the sharpness and current of cutter head A and cutter head B over 1217 hours, indicating that the cutter head with insert 2 has a relatively lower current and a longer operating time.

[0050] Referring to Figure 5, Figure 5 shows the temperature rise curve of the cutting head at 6000 rpm, when the blade body 1 is made of steel, aluminum, or 925 silver, and is equipped with a boron carbide ceramic insert 2. This is compared with the temperature rise curve of the cutting head in the prior art. The gray line represents the ambient temperature during the test; the purple line represents the cutting head in the prior art without insert 2; the green line represents the blade body 1 being made of steel; the magenta line represents the blade body 1 being made of aluminum; and the yellow line represents the blade body 1 being made of 925 silver.

[0051] As shown in Figure 5, the cutting head of the prior art heats up relatively quickly. As the working time of the cutting head increases, the temperature of the cutting head with boron carbide ceramic plates of the three different materials rises more slowly and gradually. At the same time, the temperature of the cutting head with boron carbide ceramic plates of the three different materials is lower than that of the cutting head in the prior art.

[0052] The implementation principle of a trimming blade according to an embodiment of this application is as follows: When trimming hair, the insert 2 is in direct contact with the fixed blade or the moving blade, resulting in a lower temperature during friction. The first cutting tooth 11 has high strength, and it is not easily deformed or broken during a fall, thus affecting its service life. At the same time, the tooth tip of the first cutting tooth 11 extends beyond the tooth tip of the second cutting tooth 21; the protective protrusion 13 protects the other side of the insert 2. When the blade body 1 falls from the side of the protective protrusion 13 away from the bottom of the mounting groove 12 and hits the ground, the protective protrusion 13 will touch the ground. Since there is a certain distance between the second cutting tooth 21 and the protective protrusion 13, this distance can buffer and unload the stress generated during the fall, ensuring that the insert 2 is not damaged during the fall, further improving the service life of the blade.

[0053] Secondly, another embodiment of the present invention provides a hair trimming tool, which is equipped with the trimming blades in the first aspect, resulting in a lower heating temperature, lighter weight, and less breakage of the inserts after a drop, thereby improving the service life of the hair trimming tool.

[0054] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0055] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure 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 disclosure.

[0056] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0058] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A pruning blade, characterized in that: The device includes a blade body (1) and an insert (2). The blade body (1) is adapted to be mounted on a hair trimmer. The insert (2) is connected to the blade body (1) and is adapted to rub against a fixed blade or a moving blade. The insert (2) is a ceramic part. A first tooth (11) is provided on one side of the blade body (1), and a second tooth (21) is provided on one side of the insert (2). The second tooth (21) is correspondingly arranged with the first tooth (11) and is adapted to cooperate with the fixed blade or the moving blade to trim hair.

2. The trimming blade according to claim 1, characterized in that: The insert (2) is a boron carbide ceramic sheet, a cubic boron nitride sheet, or a zirconium oxide sheet.

3. The trimming blade according to claim 1, characterized in that: The thickness of the insert (2) is 0.2mm-0.5mm.

4. The trimming blade according to claim 1, characterized in that: The blade body (1) is made of steel, titanium alloy, silver, silver alloy, aluminum, or plastic.

5. The trimming blade according to claim 1, characterized in that: The second cutting tooth (21) does not protrude beyond the tip of the first cutting tooth (11), and when it falls, the tip of the first cutting tooth (11) touches the ground.

6. The trimming blade according to any one of claims 1-5, characterized in that: The blade body (1) is provided with a mounting groove (12), and the insert (2) is located in the mounting groove (12).

7. The trimming blade according to claim 6, characterized in that: The second cutting tooth (21) is located in the mounting groove (12), and the tip of the second cutting tooth (21) is spaced apart from the tip of the first cutting tooth (11). The upper surface of the first cutting tooth (11) is in contact with the lower surface of the second cutting tooth (21).

8. The trimming blade according to claim 6, characterized in that: The tip of the first cutting tooth (11) is fixedly provided with a protective protrusion (13), the protective protrusion (13) extends toward the side where the insert (2) is located, the second cutting tooth (21) does not protrude from the mounting groove (12), and the tip of the second cutting tooth (21) is spaced 0.2mm-0.5mm from the protective protrusion (13).

9. The trimming blade according to claim 6, characterized in that: The thickness of the first cutting tooth (11) at the tip is 0.5mm-0.8mm, and the width of the first cutting tooth (11) at the tip is 0.5mm-0.8mm.

10. A hair trimming tool, characterized in that, Includes the trimming blade as described in any one of claims 1-9.

Images