Multi-material combined blade capable of reducing cost

Abstract

The multi-material combined blade comprises a cutter tooth part and a cutter body part which are independent of each other, a plurality of cutter teeth arranged at intervals are arranged in the cutter tooth part, and a hair guide groove is formed between every two adjacent cutter teeth; wherein the cutter tooth part is a hard part, so that sharp cutting edges are formed at the edges of cutting teeth, and the cutter body part is a blade formed by connecting a non-metal part and the cutter tooth part into a whole; at least one wear-resistant body made of a material different from that of the cutter body part is arranged on the cutter body part, the wear-resistant body and the cutter body part are connected into a whole, and the surface of the wear-resistant body can be in contact with a matched part. The invention has the technical effects that the blades are designed into mutually independent split structures, so that different materials can be selected according to the functions or purposes of the cutter tooth part and the cutter body part. On the premise that the hair trimming performance is guaranteed, the overall material cost and the overall weight of the blade are reduced, the overall vibration sense, the working noise and the surface temperature rise of the blade in the using process are reduced, and the using comfort of the hair trimming tool is improved.

Description

Technical Field

[0001] The invention relates to a hair trimming device, and more particularly to a multi-material combined blade with reduced cost, which is mainly used in the field of personal care tools such as hair clippers, razors, and hair trimmers. Background Art

[0002] The existing blade assembly used in hair clippers, razors or shavers mainly includes a static blade and a dynamic blade. In order to trim hair, both the static blade and the dynamic blade need to have a high hardness so that the cutting teeth in the static blade and the dynamic blade can form a more durable and sharp edge. The hair to be trimmed will more or less adhere to sweat or oil secreted by the skin. After trimming is completed, the trimming blade is mostly cleaned and maintained with clean water. Under the combined action of sweat, oil and cleaning water, the corrosion resistance of the static blade and the dynamic blade is relatively higher.

[0003] The stationary blade and the movable blade in the existing blade head assembly are basically formed of a single material in one piece. However, when trimming hair, only the cutting teeth in the stationary blade and the movable blade play a major role, and the other parts are only used to assist the installation of the stationary blade or the movable blade. Therefore, if the stationary blade and the movable blade are all formed of the same material in one piece, not only the overall material cost of the stationary blade is greatly increased, resulting in a waste of materials; but also the weight of the blade head assembly itself is increased, resulting in increased vibration and noise during operation, which reduces the comfort of use. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a multi-material combination blade with reduced cost, which can not only ensure the cutting sharpness and corrosion resistance of key components, but also reduce the overall material cost and overall weight, reduce vibration and noise during operation, and improve comfort of use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is to reduce the cost of a multi-material combination blade, including a tooth portion and a body portion that are independent of each other, in which a plurality of teeth are arranged at intervals, and a hair guide groove is formed between adjacent teeth; wherein the tooth portion is a hard part so that a sharp cutting edge is formed at the edge of each cutting tooth, and the body portion is a non-metallic part connected to the tooth portion as a whole to form a blade; at least one wear-resistant body made of a different material from the body portion is provided on the body portion, and the wear-resistant body is connected to the body portion as a whole and its surface can contact with the mating component.

[0006] Preferably, the tooth portion is a metal or ceramic hard part, so that a sharp cutting edge is formed at the edge of each cutting tooth in the tooth portion.

[0007] Preferably, the blade body is a thermoplastic plastic part, and is integrally formed with the blade teeth by secondary injection molding; or, The blade body is a thermoplastic plastic part, which is formed by hot-melt injection molding and then integrated with the blade teeth by buckling, bonding, riveting or welding.

[0008] Preferably, the blade body is a wooden or bamboo piece, and is connected to the blade teeth portion as a whole by snapping, bonding, riveting or screws.

[0009] Preferably, the wear-resistant body is a ceramic piece and at least one piece is provided. A groove for installing the wear-resistant body is provided in the cutter body. The wear-resistant body is installed in the groove and its surface can contact with the matching blade.

[0010] Preferably, a protective layer connected to the tooth portion as a whole is provided outside the tooth portion, and the protective layer covers at least the outer surface of the tooth portion that contacts the skin.

[0011] Preferably, the tooth portion includes a tooth surface in contact with the skin and a tooth end face formed at the tooth end of each cutting tooth, and the protective layer at least covers the tooth surface and tooth end face in the tooth portion and is connected to the tooth surface and tooth end face as a whole.

[0012] Preferably, a cutting working surface is formed in the tooth portion, which is arranged opposite to the tooth surface in the tooth portion, and the protective layer at least covers the tooth tip of each cutting tooth in the tooth portion and forms a protrusion higher than the cutting working surface.

[0013] Preferably, the tooth end surface of each cutting tooth in the blade tooth portion is respectively provided with an anti-slip structure, and the protective layer is coated outside the anti-slip structure and connected to each cutting tooth as a whole.

[0014] Preferably, the protective layer is a thermoplastic plastic member that is flexible and elastically deformable.

[0015] The beneficial effects of the present invention are:

[0016] 1. By setting the blades as independent split structures, different materials can be selected according to the functions or uses of the teeth and the body. Under the premise of ensuring the hair trimming performance, the overall material cost and weight of the blades can be reduced, the overall vibration, working noise and surface temperature rise of the blades during use can be reduced, and the comfort of using hair trimming tools can be improved.

[0017] 2. The tooth part is a hard part, so that a sharp cutting edge is formed at the edge of each cutting tooth. Since the tooth part and the blade body are separate and independent, when selecting materials, materials with higher hardness and corrosion resistance can be selected in a targeted manner. Selecting a high-performance material for the tooth part alone will not significantly increase the overall material cost of the blade. At the same time, it can also significantly improve the cutting sharpness and corrosion resistance of each cutting tooth in the tooth part, improve the hair trimming performance of the tooth part and extend its service life.

[0018] 3. The blade body is only used to assist the assembly of the blade teeth and mainly serves as a connection. For cost considerations, it is not necessary to use the same material as the blade teeth. It can be made of low-cost non-metallic materials. This can not only greatly reduce the overall material cost of the blade, but also reduce the overall weight of the blade, reduce the vibration, working noise and surface temperature rise of the blade during use, and improve the overall comfort of the blade.

[0019] 4. Since the blade body is made of non-metallic materials, the non-metallic blade body is easily excessively worn when the blade for trimming hair is attached to the blade body and oscillates back and forth at a high frequency. By adding wear-resistant bodies of different materials to the blade body, the blade for trimming hair can directly contact the wear-resistant body during assembly, thus preventing the non-metallic blade body from being worn and extending the service life of the blade body.

[0020] 5. Adding a protective layer outside the blade teeth not only blocks the direct contact between the outer surface of the blade teeth and the skin, but also plays a heat-insulating role, avoiding skin burns and improving the comfort of using the blade; at the same time, it can also prevent the skin from being pierced when the cutting teeth are inserted into the hair, thus improving the safety of using the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional assembly diagram of the first embodiment of the multi-material combined blade for reducing the cost of the present invention

[0022] Figure 2 A three-dimensional structural diagram of the first embodiment of the multi-material combined blade for reducing the cost of the present invention

[0023] Figure 3 A perspective exploded view of the first embodiment of the multi-material combination blade for reducing the cost of the present invention

[0024] Figure 4 A three-dimensional assembly diagram of the second embodiment of the multi-material combined blade for reducing the cost of the present invention

[0025] Figure 5 A three-dimensional structural diagram of the second embodiment of the multi-material combined blade for reducing the cost of the present invention

[0026] Figure 6 The three-dimensional structure diagram of the blade teeth in the embodiment of the present invention

[0027] Figure 7 A three-dimensional diagram of the second anti-slip structure in the embodiment of the present invention

[0028] Figure 8 A cross-sectional structural diagram of a multi-material combined blade for reducing costs of the present invention DETAILED DESCRIPTION

[0029] The following is combined with Figures 1 to 8The embodiments of the present invention are further described as follows:

[0030] Since existing hair trimming blades are basically formed of metal materials in one piece, during the hair trimming process, only the blade body part of the blade is needed to trim the hair, while the other parts only play an auxiliary role to facilitate the overall assembly of the blade. Therefore, forming the blade in one piece with metal materials not only increases the overall material cost of the blade, but also increases the overall weight of the blade, and correspondingly increases the overall vibration, working noise and surface temperature rise of the blade head assembly during use.

[0031] In order to solve the above technical defects, the present invention provides a multi-material combined blade with reduced cost, including a tooth portion 1 and a body portion 2 that are independent of each other. By setting the blade as a separate structure that is independent of each other, different materials can be selected according to the functions or uses of the tooth portion 1 and the body portion 2. Under the premise of ensuring the hair trimming performance, the overall material cost and overall weight of the blade are reduced, the overall vibration, working noise and surface temperature rise of the blade during use are reduced, and the comfort of use of the hair trimming tool is improved.

[0032] To facilitate the introduction and trimming of hair, a plurality of cutting teeth 3 are arranged at intervals in the tooth portion 1, and hair guide grooves 4 are formed between adjacent cutting teeth 3; wherein the tooth portion 1 is a hard part so that a sharp cutting edge is formed at the edge of each cutting tooth 3, and the blade body portion 2 is a non-metallic part connected to the tooth portion 1 as a whole to form a blade.

[0033] Hard parts refer to parts made of hard materials. If the tooth part 1 is made of hard materials, the various performances of the tooth part 1 can be improved according to the function or purpose of the tooth part 1. For example, when the tooth part 1 is used to trim hair, it needs to frequently contact the skin and needs a sharper blade, and the oil secreted by the skin and the sweat discharged are corrosive to a certain extent. Therefore, there are higher requirements for the material hardness and corrosion resistance of the tooth part 1. When selecting materials, materials with higher hardness and corrosion resistance can be selected in a targeted manner. Since the tooth part 1 and the blade body part 2 are separate and independent of each other, when a higher performance material is selected for the tooth part 1 alone, the overall material cost of the blade will not be significantly increased. At the same time, it can also greatly improve the cutting sharpness and corrosion resistance of each cutting tooth 3, improve the hair trimming performance of the tooth part 1 and extend its service life.

[0034] The blade body 2 is only an auxiliary assembly of the blade tooth part 1 and mainly plays a connecting role. For cost considerations, it does not need to be made of the same material as the blade tooth part 1, and can be made of lower-cost non-metallic materials. This not only greatly reduces the overall material cost of the blade, but also reduces the overall weight of the blade, reduces the vibration, working noise and surface temperature rise of the blade during use, and improves the overall comfort of the blade.

[0035] Since the blade body 2 is made of non-metallic material, when the blade for trimming hair is attached to the blade body 2 and reciprocates at a high frequency, the non-metallic blade body 2 is easily excessively worn. In this regard, at least one wear-resistant body 5 made of a different material from the blade body 2 is provided on the blade body 2, and the wear-resistant body 5 is connected to the blade body 2 as a whole and its surface can contact with the matching component; by adding the wear-resistant body 5 to the blade body 2, during assembly, the blade for trimming hair can directly contact the wear-resistant body 5, so that the non-metallic blade body 2 will not be worn, and the service life of the blade body 2 is extended.

[0036] In order to ensure the hair trimming performance of the blade tooth portion 1, the blade tooth portion 1 is a metal or ceramic hard part, so that a sharp cutting edge is formed at the edge of each cutting tooth 3 in the blade tooth portion 1. The blade tooth portion 1 is made of metal or ceramic, which not only forms a sharp edge at the edge of each cutting tooth 3, but also ensures the hair trimming performance and corrosion resistance of the blade tooth portion 1. In the actual production process, whether to use metal or ceramic can be determined according to user needs, and this embodiment does not make further restrictions.

[0037] In order to reduce the overall cost of the blade and facilitate the production and assembly of the blade, the blade body 2 is a thermoplastic plastic part. The cost of plastic is much lower than that of metal, and the density of plastic is also lower than that of metal. Making the blade body 2 out of plastic can not only reduce the overall material cost of the blade, but also greatly reduce the overall weight of the blade, thereby reducing the overall vibration, working noise and surface temperature rise of the blade during use, and improving the comfort of using the blade.

[0038] During the production of the blade body 2, the blade teeth 1 can be integrally formed with the blade body 2 by secondary injection molding, which has relatively high production efficiency, but has the disadvantage of increasing the difficulty of making the injection mold and the production cost of the injection mold. Of course, the blade body 2 can also be directly injection molded by an injection molding machine, and then integrated by buckling, bonding, riveting or welding. For the purpose of fixed connection, other methods known to those skilled in the art can also be selected, which are not further limited in this embodiment.

[0039] In order to reduce the overall cost of the blade, the blade body 2 can also be made of wood or bamboo material, and then connected to the blade tooth part 1 by snapping, bonding, riveting or screwing. Since wood or bamboo materials will go moldy after being used for a period of time, it is a preferred embodiment to use plastic to make the blade body 2.

[0040] In order to reduce friction resistance, the wear-resistant body 5 is provided with at least one ceramic piece, and in actual production, the ceramic piece is provided with two pieces, so that the space and volume occupied by the wear-resistant body 5 can be reduced, and the overall weight of the blade can be reduced, while preventing the blade body 2 from being worn. In order to facilitate the installation of the wear-resistant body 5, a groove for installing the wear-resistant body 5 is provided in the blade body 2, and the wear-resistant body 5 is installed in the groove and its surface can contact the mating blade. Since the wear-resistant body 5 is made of ceramic, the surface of the wear-resistant body 5 is in contact with the mating blade, so that the friction resistance between the two can be effectively reduced, and the wear-resistant body 5 made of ceramic and the blade body 2 made of plastic can reduce the transfer of heat, thereby reducing the surface temperature rise of the blade during operation.

[0041] like Figures 4 to 8 As shown, in order to prevent the skin from being burned due to the high temperature rise on the surface of the toothed portion 1 caused by friction resistance when the toothed portion 1 cuts hair, and to prevent the tips of the cutting teeth 3 in the toothed portion 1 from being too sharp and piercing the skin, a protective layer 6 connected to the toothed portion 1 is provided outside the toothed portion 1, and the protective layer 6 covers at least the outer surface of the toothed portion 1 that contacts the skin. By providing the protective layer 6 in the toothed portion 1, not only is the direct contact between the outer surface of the toothed portion 1 and the skin blocked, which plays a role in heat insulation, prevents the skin from being burned, and improves the comfort of the blade; at the same time, it can also prevent the cutting teeth 3 from piercing the skin when inserted into the hair, and improve the safety of the blade.

[0042] In order to maximize the heat insulation and protection performance of the protective layer 6, the blade tooth portion 1 includes a tooth surface 11 in contact with the skin, and a tooth end face 12 formed at the tooth end of each cutting tooth 3. The protective layer 6 at least covers the tooth surface 11 and the tooth end face 12 in the blade tooth portion 1 and is connected to the tooth surface 11 and the tooth end face 12 as a whole. By covering the protective layer 6 on the tooth surface 11 of the blade tooth portion 1 and the tooth end face 12 of each cutting tooth 3, when in use, the tooth surface 11 is blocked by the protective layer 6, which can effectively prevent the surface temperature of the blade tooth portion 1 from radiating outward, thereby improving the heat insulation effect; and the tooth end face 12 of each cutting tooth 3 is also covered with the protective layer 6. When each cutting tooth 3 of the blade tooth portion 1 is inserted into the hair clump, the tooth end face 12 of the cutting tooth 3 can be prevented from directly contacting the skin, which not only plays a role in isolating heat, but also plays a protective effect, thereby ensuring the comfort and safety of the use of the blade tooth portion 1.

[0043] In order to reduce the friction resistance of the blade when it swings back and forth to cut hair, reduce the temperature rise of the tooth portion 1 and lower the surface temperature of the tooth portion 1, a cutting working surface 13 that fits the blade for shearing is also formed in the tooth portion 1. The cutting working surface 13 is arranged opposite to the tooth surface 11 in the tooth portion 1. The protective layer 6 at least covers the tooth tip of each cutting tooth 3 in the tooth portion 1 and forms a protrusion 61 higher than the cutting working surface 13. The length of the protrusion 61 is less than the length of the cutting tooth 3. In actual production, the protective layer 6 can be covered on the entire surface of the tooth portion 1 relative to the skin or the area cooperating with the relative blade, and then the grinding process is used to grind the entire plane or the area in contact with the mating blade to remove the protective layer 6, so that the cutting working surface 13 is formed on the tooth portion 1, and the distance between the edge of the tooth portion 1 and the grinding wheel can be controlled, so that a protrusion 61 higher than the cutting working surface 13 is formed at the edge of one side of each cutting tooth 3 in the tooth portion 1 (that is, the tooth tip of the cutting tooth 3). By using this protrusion 61, not only can the end of the cutting tooth 3 be blocked from directly contacting the skin, preventing the skin from being scalded, and improving the comfort of use; at the same time, the protrusion 61 can also play a protective role, avoiding the skin from being pierced by the excessively sharp tooth tip of the cutting tooth 3, thereby improving the safety of the tooth portion 1 when it contacts the skin; and the protrusion 61 can also isolate the cutting teeth 3 in the mating blade from contacting the skin, avoiding the cutting teeth 3 in the mating blade from cutting the skin. Secondly, by grinding the surface of the blade tooth portion 1 relative to the surface in contact with the skin to form a cutting working surface 13, the surface flatness of the cutting working surface 13 can be effectively improved, the friction resistance when cutting hair in reciprocating motion can be reduced, and the surface temperature rise of the blade tooth portion 1 can be effectively reduced, thereby achieving the purpose of reducing the surface temperature of the blade tooth portion 1.

[0044] In order to enhance the connection firmness between the protective layer 6 and the tooth portion 1, the tooth end face 12 of each cutting tooth 3 in the tooth portion 1 is provided with an anti-slip structure 7, the cross-sectional area of ​​the anti-slip structure 7 is smaller than the cross-sectional area of ​​the tooth end face 12 of each cutting tooth 3, and the protective layer 6 is coated on the anti-slip structure 7 and connected to each cutting tooth 3 as a whole. By setting the cross-sectional area of ​​the anti-slip structure 7 to be smaller than the cross-sectional area of ​​the tooth end face 12 of each cutting tooth 3, when the protective layer 6 is coated on the tooth end face 12 of each cutting tooth 3, the protective layer 6 can be flush with both sides of each cutting tooth 3, preventing the protective layer 6 from occupying the space at the opening of the hair guide groove 4 and affecting the introduction of hair. In actual production, the anti-slip structure 7 is in the shape of a step, or is in the shape of a sheet with an open groove, such as the attached Figures 6-7 As shown, the anti-slip structure 7 is provided to improve the connection firmness between the protective layer 6 and the blade tooth portion 1. The anti-slip structure 7 can be used as long as it can play the role of connection firmness. In this embodiment, only two structures that are easy to produce are given, which does not mean that only the attached structure can be used. Figures 6-7 The structure shown in the figure can be modified as necessary according to the actual product structure.

[0045] Under the premise of preventing skin from being scalded and stabbed, the protective layer 6 is a thermoplastic plastic part with flexibility and elastic deformation, preferably PP thermoplastic plastic. Of course, ABS, PA, PC, POM and PVC can also be used. The protective layer 6 is made of plastic with certain flexibility and elasticity. When the blade tooth part 1 contacts the skin and bears external force, the protective layer 6 with certain flexibility and elasticity can play a certain protective role on the skin, avoid scratching the skin and make the skin feel more comfortable, thereby improving the comfort of the blade. Secondly, PP also has certain high temperature resistance and corrosion resistance, which can not only block heat, but also prevent the surface temperature of the blade tooth part 1 from rising and scalding the skin, thereby improving the safety of the blade; at the same time, after the blade is used, the blade tooth part 1 will be cleaned with clean water. The good corrosion resistance can also prevent the protective layer 6 from being eroded by the oil or sweat secreted by the skin, thereby improving the hygienic safety of the blade tooth part 1 and extending the service life of the blade tooth part 1.

[0046] The above embodiments should not be regarded as limiting the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. Reduce the cost of multi-material combination blades, characterized by The invention comprises a tooth portion (1) and a body portion (2) which are independent of each other, wherein a plurality of cutting teeth (3) are arranged at intervals in the tooth portion (1), and hair guide grooves (4) are formed between adjacent cutting teeth (3); wherein the tooth portion (1) is a hard part so that a sharp cutting edge is formed at the edge of each cutting tooth (3), and the body portion (2) is a non-metallic part connected to the tooth portion (1) as a whole to form a blade; and wherein at least one wear-resistant body (5) made of a material different from that of the body portion (2) is provided on the body portion (2), and the wear-resistant body (5) is connected to the body portion (2) as a whole and its surface can contact with a matching component.

2. The multi-material combination blade with reduced cost according to claim 1, characterized in that The blade tooth portion (1) is a metal or ceramic hard part, so that a sharp cutting edge is formed at the edge of each cutting tooth (3) in the blade tooth portion (1).

3. The multi-material combination blade with reduced cost according to claim 1, characterized in that The blade body (2) is a thermoplastic plastic part, and is integrally formed with the blade tooth part (1) by secondary injection molding; or, The blade body (2) is a thermoplastic plastic part, which is formed by hot-melt injection molding and then integrated with the blade tooth part (1) by buckling, bonding, riveting or welding.

4. The multi-material combination blade with reduced cost according to claim 1, characterized in that The blade body (2) is a wooden or bamboo piece, and is connected to the blade tooth portion (1) as a whole by snapping, bonding, riveting or screws.

5. The multi-material combination blade with reduced cost according to claim 1, characterized in that The wear-resistant body (5) is a ceramic piece and is provided with at least one piece. A groove for installing the wear-resistant body (5) is provided in the blade body (2). The wear-resistant body (5) is installed in the groove and its surface can contact with the matching blade.

6. The multi-material combination blade with reduced cost according to claim 1, characterized in that A protective layer (6) connected to the blade tooth portion (1) is provided outside the blade tooth portion (1) and is integrally connected to the blade tooth portion (1). The protective layer (6) covers at least the outer surface of the blade tooth portion (1) that contacts the skin.

7. The multi-material combination blade with reduced cost according to claim 6, characterized in that The tooth portion (1) comprises a tooth surface (11) in contact with the skin, and a tooth end surface (12) formed at the tooth end of each cutting tooth (3); the protective layer (6) at least covers the tooth surface (11) and the tooth end surface (12) in the tooth portion (1) and is respectively connected to the tooth surface (11) and the tooth end surface (12) as a whole.

8. The multi-material combination blade with reduced cost according to claim 7, characterized in that A cutting working surface (13) is also formed in the tooth portion (1), and the cutting working surface (13) is arranged opposite to the tooth surface (11) in the tooth portion (1). The protective layer (6) at least covers the tooth tip of each cutting tooth (3) in the tooth portion (1) and forms a protrusion (61) higher than the cutting working surface (13).

9. The multi-material combination blade with reduced cost according to claim 6, characterized in that The tooth end surface (12) of each cutting tooth (3) in the blade tooth portion (1) is respectively provided with an anti-slip structure (7), and the protective layer (6) is coated outside the anti-slip structure (7) and connected to each cutting tooth (3) as a whole.

10. The multi-material combination blade with reduced cost according to claim 6, characterized in that The protective layer (6) is a thermoplastic plastic part that is flexible and elastically deformable.

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