Trimming blade and hair trimming tool

Abstract

The invention relates to the field of hair trimmers, and discloses a trimming blade and a hair trimming tool. The blade comprises a blade body and an insert, the blade body is suitable for being installed on the hair trimmer, the insert is connected with 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 piece, first cutter teeth are arranged on one side of the blade body, second cutter teeth are arranged on one side of the insert, and the second cutter teeth correspond to the first cutter teeth. The second cutter teeth are suitable for being matched with the fixed blade or the movable blade to trim hair. The insert is a boron carbide ceramic piece or a cubic boron nitride piece of a piece body and is in direct contact with the fixed blade or the movable blade, and during friction, the heating temperature is low, the temperature rise is slow, the sharpness is better, and the wear resistance is better; the insert plays a role in being in contact with the fixed blade or the movable blade and cutting hair, so that the selection range of materials of the blade body is wide, namely, the materials with low density can be selected, and the whole blade is lighter; and the insert is not easy to break.

Description

Technical Field

[0001] The present invention relates to the technical field of hair trimmers, and more particularly, to a trimming blade and a hair trimming tool. Background Art

[0002] When trimming hair, it is mainly completed by the cooperation of a fixed blade and a moving blade on a hair trimming tool. Multiple fixed cutter teeth are arranged at intervals on the fixed blade, and multiple moving cutter teeth are arranged at intervals on the moving blade; the fixed blade is fixedly arranged on the hair trimming tool, the moving blade is in close contact with the fixed blade, and the moving blade can reciprocally move or rotate relative to the fixed blade under the drive of a driving member inside the hair trimming tool. At this time, the fixed cutter teeth and the moving cutter teeth cooperate with each other to complete the trimming of hair.

[0003] Since the moving blade and the fixed blade are in close contact, during the movement of the moving blade relative to the fixed blade, the moving blade and the fixed blade will generate heat due to friction, resulting in a relatively rapid increase in the surface temperature of the moving blade and the fixed blade. In addition, the cutter head is mostly made of a heavy metal material and is relatively heavy. Summary of the Invention

[0004] To solve at least one of the above problems, the present invention first provides a trimming blade, including a blade body and an insert. The blade body is adapted to be installed on a hair trimmer, the insert is connected to the blade body, the insert is adapted to be in frictional contact with a fixed blade or a moving blade, the insert is a ceramic part, a first cutter tooth is provided on one side of the blade body, a second cutter tooth is provided on one side of the insert, the second cutter tooth is arranged corresponding to the first cutter tooth, and the second cutter tooth is adapted to cooperate with the fixed blade or the moving blade to trim hair.

[0005] Optionally, the insert is a sheet-shaped boron carbide ceramic sheet or cubic boron nitride sheet or zirconia sheet.

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

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

[0008] Optionally, the second cutter tooth does not protrude beyond the tip of the first cutter tooth. When dropped, the tip of the first cutter 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 cutter tooth is located in the mounting groove, the tip of the second cutter tooth is spaced from the tip of the first cutter tooth, and the upper surface of the first cutter tooth is in contact with the lower surface of the second cutter tooth.

[0011] Optionally, a protective bump is fixedly provided at the tip of the first cutting tooth. The protective bump extends toward the side where the insert is located. The second cutting tooth does not protrude from the mounting groove, and there is a gap of 0.2 mm - 0.5 mm between the tip of the second cutting tooth and the protective bump.

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

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

[0014] 1. The insert itself has good wear resistance, and at the same time, the friction coefficient is lower than that of metal materials. Therefore, when trimming hair, the insert directly contacts the fixed blade or the moving blade, so that the temperature rise due to friction of the blade is lower. In addition, the smaller friction coefficient also makes the blade less dependent on lubricating oil and can be used normally in a state of no oil or low oil.

[0015] 2. The insert is selected from a sheet of boron carbide ceramic, cubic boron nitride or zirconia. It has better sharpness and cuts hair more smoothly. The boron carbide ceramic sheet, cubic boron nitride sheet and zirconia sheet can also be ground during friction and still have good sharpness after long-term use. At the same time, the boron carbide ceramic sheet, cubic boron nitride sheet and zirconia sheet are not prone to heat generation after friction.

[0016] 3. Since the insert undertakes the contact with the fixed blade or the moving blade and the function of cutting hair, the material range of the blade body is relatively wide. Compared with the blade body made of steel material, when the blade body is made of silver material, silver alloy, aluminum material or plastic, the blade body will be lighter, and at the same time, the trimming tool equipped with the blade will also be lighter.

[0017] 4. The insert is also arranged at an interval from the trimming end of the blade body. When the blade falls, the trimming end of the blade body touches the ground, and the insert is not easily in direct contact with the ground and broken, which improves the service life of the blade and the trimming tool.

[0018] 5. The protective bump will protect the other side of the insert. When the blade body falls and touches the ground from the side of the protective bump away from the bottom of the mounting groove, the protective bump will touch the ground. Since there is a certain distance between the second cutting tooth and the protective bump, this distance can buffer and unload the stress generated during the fall, ensuring that the insert is not damaged during the fall.

[0019] 6. The thickness and width of the tip of the first cutting tooth are both 0.5 mm - 0.8 mm. Compared with the teeth on the existing blades, they are thicker and stronger. When the blade body falls, the first cutting tooth is not easily deformed or broken, further improving 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 with the prior art, the hair trimming tool of the present invention has the same advantages as those described above with respect to the prior art, which will not be elaborated here. Description of the Drawings

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

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

[0024] Figure 3 It is a side view of the blade body and the insert in the cooperating state in the embodiment of the present invention (the gap between the blade body and the insert in the figure represents the glue filling layer);

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

[0026] Figure 5 It is a comparison diagram of the temperature rise curves of the lower tool head of the blade body made of steel material, aluminum material, and 925 silver material at 6000 revolutions per minute in the embodiment of the present invention with that of the prior art.

[0027] Explanation of the reference numerals: 1. Blade body; 11. First cutting tooth; 12. Installation groove; 13. Protective convex block; 2. Insert; 21. Second cutting tooth. Detailed Embodiments

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following further elaborates on the present application Figures 1-5 with reference to the accompanying drawings.

[0029] In the drawings of the embodiments of the present invention, a coordinate system XYZ is provided, where 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 rear, the positive direction of the Z-axis represents the upper, and the negative direction of the Z-axis represents the lower.

[0030] In the first aspect, the embodiment of the present invention provides a trimming blade. Refer to Figure 1, the trimming blade includes a blade body 1 and an insert 2. The blade body 1 is adapted to be installed on a hair trimmer. The insert 2 is connected to the blade body 1, and the insert 2 is adapted to be in frictional contact with a stationary blade or a moving blade to reduce the heat generation temperature during friction. The insert 2 is a ceramic part or a cubic boron nitride part. A first cutter tooth 11 is provided on one side of the blade body 1, and a second cutter tooth 21 is provided on one side of the insert 2. The second cutter tooth 21 corresponds to the first cutter tooth 11, and the second cutter tooth 21 is adapted to cooperate with a stationary blade or a moving blade to trim hair.

[0031] The insert 2 can be a boron carbide ceramic sheet in the form of a sheet, or a cubic boron nitride sheet, or a zirconia sheet. Boron carbide ceramic sheets, cubic boron nitride sheets and zirconia sheets all belong to ceramics. Boron carbide ceramic sheets, cubic boron nitride sheets and zirconia sheets all have relatively high hardness and are more wear-resistant. The thin boron carbide ceramic sheets, cubic boron nitride sheets and zirconia sheets have better sharpness and smoother hair cutting. The friction coefficients of boron carbide ceramic sheets, cubic boron nitride sheets and zirconia sheets are all relatively low. Therefore, the frictional resistance will be smaller, improving the service life of the blade; compared with metal materials, the heat generation temperature after blade friction is lower. When the moving blade reciprocates, the boron carbide ceramic sheet, cubic boron nitride sheet and zirconia sheet can be ground, enabling the cutter head to have a self-grinding function and ensuring the sharpness of the cutter head after long-term use. In this embodiment, the insert 2 is preferably a zirconia sheet, and the insert 2 is adhesively bonded to the blade body 1 with a glue solution. In another embodiment, the insert 2 can be glass; in addition, in other embodiments, materials with high strength, small friction coefficient and good sharpness can also be used as the insert 2, such as alumina, silicon carbide, tungsten carbide, silicon nitride, aluminum nitride, boron nitride.

[0032] The thickness of the insert 2 is 0.2 mm - 0.5 mm. In this embodiment, the thickness of the insert 2 is preferably 0.2 mm. Further, the insert 2 is more sharp while ensuring slow temperature rise after friction, being relatively wear-resistant and having a small friction coefficient. At the same time, it saves materials and reduces costs.

[0033] The blade body 1 can be one of steel materials, titanium alloy materials, silver materials, silver alloys, aluminum materials or plastics. When the blade body 1 is made of steel material, the overall strength of the blade body 1 is higher and it is more wear-resistant; compared with steel materials, when the blade body 1 is made of titanium alloy material, the weight of the blade body 1 will be lighter. When the blade body 1 is made of aluminum material, the heat dissipation effect of the blade body 1 is better and it is more lightweight; compared with aluminum materials, when the blade body 1 is made of silver material or silver alloy, the heat dissipation effect of the blade body 1 will be relatively better, and at the same time, it can also reflect the dignity of the user. Compared with aluminum materials, when the blade body 1 is made of plastic, it is more lightweight and has a lower cost. In this embodiment, the blade body is preferably made of aluminum material.

[0034] The blade body 1 can be a fixed blade; it can also be a moving blade. When the blade body 1 is a fixed blade, the insert 2 will be in frictional contact with the moving blade; when the blade body 1 is a moving blade, the insert 2 will be in frictional contact with the fixed blade. In this embodiment, it is preferred that the blade body 1 is a fixed blade.

[0035] Referring to Figure 1 With Figure 2 , let the end of the blade body 1 where the first cutting teeth 11 are provided be the front end of the blade body 1, and the end of the insert 2 where the second cutting teeth 21 are provided be the front end of the insert 2. The front end (tooth tip) of the second cutting teeth 21 does not protrude beyond the front end (tooth tip) of the first cutting teeth 11, and the front ends of the second cutting teeth 21 and the first cutting teeth 11 are arranged at intervals. When dropping, the tooth tips of the first cutting teeth 11 can touch the ground first to protect the insert 2, so that the insert 2 is not easily damaged when the blade drops, thereby improving the service life of the blade body 1. In addition, adjacent two first cutting teeth 11 form a channel for hair to enter, which facilitates the cooperation between the moving blade and the second cutting teeth 21 to cut the hair.

[0036] A plurality of first cutting teeth 11 are provided at intervals; a plurality of second cutting teeth 21 are also provided at intervals. The shape of the second cutting teeth 21 is adapted to the shape of the first cutting teeth 11. The plurality of second cutting teeth 21 correspond to the plurality of first cutting teeth 11 one by one, and the upper surface of the first cutting teeth 11 is in mutual contact with the lower surface of the second cutting teeth 21. Such a setting makes the temperature generated after the first cutting teeth 11 are rubbed lower.

[0037] Referring to Figure 3 With Figure 4 , let the thickness of the thinnest position of the first cutting teeth 11 (i.e., the tooth tip of the first cutting teeth 11) be t; the width of the widest position at the tooth tip of the first cutting teeth 11 be d. Then 0.5mm ≤ t ≤ 0.8mm, 0.5mm ≤ d ≤ 0.8mm. In this embodiment, it is preferred that t = 0.6mm; d = 0.6mm. Such a design makes the first cutting teeth 11 have greater strength compared with ordinary teeth, and the first cutting teeth 11 are not easily deformed and broken after touching the ground when dropping, so that the service life of the blade body 1 is longer.

[0038] Combined with Figure 1 Referring to Figure 3 With Figure 4 , wherein, on the side of the blade body 1 close to the moving blade, an installation groove 12 is opened, and the installation groove 12 covers the range of a plurality of first cutting teeth 11, that is, a plurality of first cutting teeth 11 are all within the range of the installation groove 12. The insert 2 is adhesively bonded to the bottom of the installation groove 12 by glue. Correspondingly, a plurality of second cutting teeth 21 are all within the installation groove 12 and do not protrude from the installation groove 12. In this way, the overall thickness after the blade body 1 and the insert 2 are connected is less different from the original thickness of the blade body 1, and thus it is more adapted to the existing hair trimming tools.

[0039] The installation groove 12 runs through the blade body 1 perpendicular to the two side walls (i.e., the left - right direction) at the front end of the blade plate body 1, making it more convenient during processing and also providing a larger space for installing the insert 2; the installation is more convenient. After the insert 2 is installed in place, flexible fixing glue is filled on both sides of the insert 2 perpendicular to the trimming end, thereby forming flexible protection on the opposite sides of the insert 2, making it less likely for the opposite sides of the insert 2 to break due to collision.

[0040] Combined Figure 1 Refer to Figure 3 With Figure 4 , wherein, on one side of the first cutter tooth 11 away from the blade body 1, a protective convex block 13 is integrally formed. The protective convex block 13 is located at the notch of the installation groove 12 and extends towards the side where the insert 2 is located. The distance from the protective convex block 13 to the bottom of the installation groove 12 is greater than the distance from one side of the second cutter tooth 21 away from the bottom of the installation groove 12 to the bottom of the installation groove 12, that is, the top surface of the protective convex block 13 is higher than the thickness of the second cutter tooth 21. When the blade body 1 drops and touches the ground from the side of the protective convex block 13 away from the bottom of the installation groove 12, the protective convex block 13 will touch the ground to protect the second cutter tooth 21. In another embodiment, the height of the extension of the protective convex block 13 is higher than the thickness of the tip end of the cutter tooth on the moving blade, thereby preventing the moving cutter tooth from cutting the skin.

[0041] Furthermore, one end of the second cutter tooth 21 away from the insert 2 is spaced from the protective convex block 13. Let the distance between the second cutter tooth 21 and the protective convex block 13 be L, then 0.2mm ≤ L ≤ 0.5mm. In this embodiment, L = 0.3mm is preferably selected. At the same time, a glue liquid that becomes flexible after solidification is filled between the second cutter tooth 21 and the protective convex block 13. Such a design can play a role in buffering and unloading the stress generated when the blade body 1 drops, ensuring that the insert 2 is not damaged during the dropping process and improving the service life of the trimming blade.

[0042] The insert 2 is a zirconia sheet, and when the blade body 1 is made of aluminum material or iron material, the test results of the tool tip are as shown in the following table (tool tip A is when the blade body 1 is made of aluminum material, and tool tip B is when the blade body 1 is made of iron material):

[0043]

[0044] It can be seen from the above table that the sharpness of the tool tip meets the test standard, and when the blade body 1 is made of aluminum material, the maximum temperature of the tool tip is lower than that when the blade body 1 is made of iron material.

[0045] The blade body 1 is made of aluminum material; the insert 2 is a zirconia sheet, and the sharpness and working current within 1217 hours are as shown in the following table:

[0046]

[0047]

[0048] The blade body 1 is made of iron material; the insert 2 is a zirconia sheet, and the sharpness and working current within 1217 hours are shown in the following table:

[0049]

[0050]

[0051] From the two tables of the sharpness and current of the tool tip A and the tool tip B within 1217 hours above, it can be seen that the tool tip with the insert 2 set has a relatively low current during use and a longer service life.

[0052] Refer to Figure 5 , Figure 5 When the blade body 1 is made of steel material, aluminum material or 925 silver material, it is equipped with a boron carbide ceramic insert 2, and the temperature rise curve of the tool tip at 6000 revolutions compared with the tool tip of the prior art. The gray line is the ambient temperature during the test; the purple line represents the tool tip of the prior art without the insert 2 installed; the green line represents the blade body 1 made of steel material; the magenta line represents the blade body 1 made of aluminum material; the yellow line represents the blade body 1 made of 925 silver material.

[0053] Through Figure 5 It can be seen that the tool tip of the prior art heats up quickly. As the working time of the tool tip increases, the temperatures of the tool tips with boron carbide ceramic inserts made of three different materials rise relatively slowly and smoothly; at the same time, the temperatures of the tool tips with boron carbide ceramic inserts made of three different materials are all lower than the temperature of the tool tip in the prior art.

[0054] The implementation principle of a trimming blade in an embodiment of the present application is as follows: When trimming hair, the insert 2 is in direct contact with the fixed blade or the moving blade, so that the temperature generated by friction is relatively low. The strength of the first cutting tooth 11 is relatively large, and the first cutting tooth 11 is not easily deformed or broken during a fall, which affects the service life. At the same time, the tooth tip of the first cutting tooth 11 protrudes beyond the tooth tip of the second cutting tooth 21; the protective bump 13 will protect the other side of the insert 2. When the blade body 1 falls and touches the ground from the side of the protective bump 13 away from the bottom of the installation groove 12, the protective bump 13 will touch the ground. Since there is a certain distance between the second cutting tooth 21 and the protective bump 13, this distance can buffer and unload the stress generated during the fall, ensuring that the insert 2 is not damaged during the fall and further improving the service life of the blade.

[0055] In a second aspect, another embodiment of the present invention provides a hair trimming tool. The hair trimming tool is installed with the trimming blade in the first aspect, so that the hair trimming tool has a low heating temperature, is lighter in weight, and the insert is not easily broken after the hair trimming tool falls, thereby improving the service life of the hair trimming tool.

[0056] Similarly, the components included in the "components", "mechanisms", and "devices" of the present disclosure can also be flexibly combined, that is, modular production can be carried out according to the actual situation and assembled modularly as an independent module; they can also be assembled separately to form a module in the present device. The division of the above components in the present disclosure is only one embodiment for the convenience of reading, rather than a limitation on the protection scope of the present disclosure. As long as the above components are included and have the same function, it should be understood as an equivalent technical solution of the present disclosure.

[0057] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present disclosure.

[0058] In addition, terms such as "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] In the present disclosure, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0060] In this disclosure, unless otherwise clearly defined and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. A first feature being "under", "beneath" and "underneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to", "arranged on", "fixedly arranged on" or "mounted on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. Further, when an element is considered to be "fixedly connected to" another element, the two can be fixed in a detachable connection manner or a non-detachable connection manner, such as socket connection, snap connection, integral molding fixation, welding, etc., which can be achieved in the traditional technology and will not be elaborated here.

[0062] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0063] The above embodiments only express several implementation manners of the present disclosure, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present disclosure, several modifications and improvements can still be made, and these all belong to the protection scope of the present disclosure.

Claims

1. A pruning blade, characterized in that: It includes a blade body (1) and an insert (2). The blade body (1) is adapted to be installed on a hair trimmer. The insert (2) is connected to the blade body (1). The insert (2) is adapted to be in frictional contact with a stationary blade or a moving blade. The insert (2) is a ceramic part. One side of the blade body (1) is provided with first cutting teeth (11). One side of the insert (2) is provided with second cutting teeth (21). The second cutting teeth (21) are arranged corresponding to the first cutting teeth (11). The second cutting teeth (21) are adapted to cooperate with a stationary blade or a moving blade to trim hair.

2. The pruning blade according to claim 1, wherein: The insert (2) is a boron carbide ceramic sheet or a cubic boron nitride sheet or a zirconia sheet in the form of a sheet.

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

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

5. The pruning blade according to claim 1, wherein: The tips of the second cutting teeth (21) do not protrude beyond the tips of the first cutting teeth (11). When it falls, the tips of the first cutting teeth (11) touch the ground.

6. The pruning 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, wherein: The second cutting teeth (21) are located in the mounting groove (12). The tips of the second cutting teeth (21) are spaced from the tips of the first cutting teeth (11). The upper surface of the first cutting teeth (11) is in contact with the lower surface of the second cutting teeth (21).

8. The trimming blade according to claim 6, wherein: A protective bump (13) is fixedly provided at the tip of the first cutting teeth (11). The protective bump (13) extends towards the side where the insert (2) is located. The second cutting teeth (21) do not protrude beyond the mounting groove (12), and there is a gap of 0.2 mm - 0.5 mm between the tips of the second cutting teeth (21) and the protective bump (13).

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

10. A hair trimming tool, characterized in that, It includes a trimming blade according to any one of claims 1 - 9.

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