Multi-material combined blade capable of reducing cost

Abstract

The utility model relates to a multi-material combined blade capable of reducing cost, which comprises a cutter tooth part and a cutter body part which are mutually independent, a plurality of cutter teeth which are 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 utility model 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 utility model relates to a hair trimming device, more particularly to a multi-material combined blade with reduced cost, mainly applied to the field of personal care tools such as hair clippers, shavers and epilators. BACKGROUND

[0002] The existing blade head assembly used in hair clippers, shavers or epilators mainly includes a static blade and a dynamic blade. In order to achieve hair trimming, the static blade and the dynamic blade need to have high hardness, so that the cutting teeth in the static blade and the dynamic blade can form a durable and sharp cutting edge. The hair to be trimmed may be more or less adhered with sweat or oil secreted by the skin. After trimming, the trimming blade is usually cleaned and maintained with water. Under the combined action of sweat, oil and cleaning water, the static blade and the dynamic blade are required to have higher corrosion resistance.

[0003] The static blade and the dynamic blade in the existing blade head assembly are basically integrally formed by a single material. However, only the cutting teeth in the static blade and the dynamic blade play a major role in trimming hair, and the other parts are only used to assist the installation of the static blade or the dynamic blade. Therefore, if the static blade and the dynamic blade are integrally formed by the same material, not only the overall material cost of the static blade is greatly increased, causing waste of materials, but also the self-weight of the blade head assembly is increased, resulting in increased vibration and noise during work, and reduced use comfort. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a multi-material combined 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 the vibration and noise during work, and improve the use comfort.

[0005] To solve the above technical problems, the utility model takes the technical scheme of a multi-material combined blade with reduced cost, which includes a blade tooth part and a blade body part that are independent of each other. A plurality of blade teeth are arranged at intervals in the blade tooth part, and a hair guide groove is formed between adjacent blade teeth. The blade tooth part is a hard part, so that a sharp cutting edge is formed at the edge of each cutting tooth. The blade body part is a non-metal part, which is connected with the blade tooth part to form a blade. At least one wear-resistant body made of a different material from the blade body part is arranged on the blade body part. The wear-resistant body is connected with the blade body part and its surface can be in contact with a matching component.

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

[0007] Preferably, the blade body part is a thermoplastic plastic part, which is integrally formed with the blade tooth part by secondary injection molding.

[0008] The cutter body part is a thermoplastic part, which is formed by hot melt injection molding and is integrated with the cutter tooth part by buckling, bonding, riveting or welding.

[0009] Preferably, the cutter body part is a wooden or bamboo part, which is integrated with the cutter tooth part by buckling, bonding, riveting or screwing.

[0010] Preferably, the wear-resistant body is a ceramic part and at least one wear-resistant body is provided in the cutter body part, and the wear-resistant body is installed in the groove and its surface can contact the matching blade.

[0011] Preferably, a protective layer is provided outside the cutter tooth part and is integrated with the cutter tooth part, and the protective layer covers at least the outer surface of the cutter tooth part in contact with the skin.

[0012] Preferably, the cutter tooth part includes a tooth surface in contact with the skin and a tooth end surface formed at the tooth end of each cutting tooth, and the protective layer covers at least the tooth surface and the tooth end surface of the cutter tooth part and is integrated with the tooth surface and the tooth end surface, respectively.

[0013] Preferably, a cutting working surface is further formed in the cutter tooth part, the cutting working surface is arranged opposite to the tooth surface of the cutter tooth part, the protective layer covers at least the tooth tip of each cutting tooth in the cutter tooth part and forms a protrusion higher than the cutting working surface.

[0014] Preferably, the tooth end surface of each cutting tooth in the cutter tooth part is provided with a anti-disengagement structure, and the protective layer covers the anti-disengagement structure outside and is integrated with each cutting tooth.

[0015] Preferably, the protective layer is a thermoplastic part with flexibility and elastic deformation.

[0016] The utility model discloses the beneficial effect is:

[0017] 1. By setting the blade as a separate split structure, different materials can be selected according to the functions or purposes of the cutter tooth part and the cutter body part. Under the premise of ensuring the hair trimming performance, the overall material cost and overall weight of the blade are reduced, the overall vibration feeling, working noise and surface temperature rise of the blade during use are reduced, and the use comfort of the hair trimming tool is improved.

[0018] 2. The cutter tooth part is a hard part, which forms a sharp cutting edge at the edge of each cutting tooth. Since the cutter tooth part and the cutter body part are separate and independent, the material with high hardness and corrosion resistance can be selected when selecting the material. When the cutter tooth part is selected with high performance material, the overall material cost of the blade is not significantly improved, and the cutting sharpness and corrosion resistance of each cutting tooth in the cutter tooth part are significantly improved, and the hair trimming performance and service life of the cutter tooth part are improved.

[0019] 3. The cutter body part is only auxiliary to the cutter tooth part for assembly, mainly for connection, and is not required to be made of the same material as the cutter tooth part for cost consideration, and can be made of non-metallic material with lower cost, so that the overall material cost of the cutter blade is greatly reduced, the overall weight of the cutter blade is reduced, vibration feeling, working noise and surface temperature rise of the cutter blade during use are reduced, and the overall use comfort of the cutter blade is improved.

[0020] 4. Since the cutter body part is made of non-metallic material, and the cutter blade for trimming hair directly contacts the wear-resistant body during combination with the cutter body part and high-frequency reciprocating swing, the cutter body part made of non-metallic material is easily excessively worn. When assembled, the cutter blade for trimming hair can directly contact the wear-resistant body, so that the cutter body part made of non-metallic material is not worn, and the service life of the cutter body part is prolonged.

[0021] 5. The protective layer additionally arranged outside the cutter tooth part not only blocks the direct contact of the outer surface of the cutter tooth part with the skin, plays a heat insulation role, avoids the skin from being scalded, and improves the use comfort of the cutter blade, but also prevents the skin from being pricked when the cutting teeth are inserted into the hair, and improves the use safety of the cutter blade. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a perspective assembly view of a first embodiment of a multi-material combined cutter blade for reducing cost of the utility model;

[0023] Figure 2 FIG. 2 is a perspective structure view of the first embodiment of the multi-material combined cutter blade for reducing cost of the utility model;

[0024] Figure 3 FIG. 3 is an exploded perspective view of the first embodiment of the multi-material combined cutter blade for reducing cost of the utility model;

[0025] Figure 4 FIG. 4 is a perspective assembly view of a second embodiment of the multi-material combined cutter blade for reducing cost of the utility model;

[0026] Figure 5 FIG. 5 is a perspective structure view of the second embodiment of the multi-material combined cutter blade for reducing cost of the utility model;

[0027] Figure 6 FIG. 6 is a perspective structure view of the cutter tooth part in the embodiment of the utility model;

[0028] Figure 7 FIG. 7 is a perspective view of the second anti-disengagement structure in the embodiment of the utility model;

[0029] Figure 8 FIG. 8 is a sectional structure view of the multi-material combined cutter blade for reducing cost of the utility model; DETAILED DESCRIPTION

[0030] The following will be described in combination with the drawingsFigures 1-8 Further description is made to the embodiments of the utility model:

[0031] Since the existing blade for hair trimming is basically integrally formed by metal material, and only the blade body part in the blade is needed to complete the trimming of hair in the process of trimming hair, and other parts only play an auxiliary role, facilitating the overall assembly of the blade. Therefore, the integrally formed blade by metal material not only increases the overall material cost of the blade, but also increases the overall weight of the blade, and accordingly increases the overall vibration feeling, working noise and surface temperature rise of the cutting head assembly during use.

[0032] To solve the above technical defects, the utility model provides a kind of multi-material combination blade of reducing cost, including mutually independent blade tooth part 1 and blade body part 2, by being equipped with mutually independent split structure, so different materials can be selected according to the function or use of blade tooth part 1 and blade body part 2. Under the premise of guaranteeing the hair trimming performance, reduce the overall material cost and overall weight of the blade, reduce the overall vibration feeling, working noise and surface temperature rise of the blade during use, improve the use comfort of hair trimming tool.

[0033] For the convenience of hair import and trimming, a plurality of cutting teeth 3 are arranged in the blade tooth part 1, and a hair guide groove 4 is formed between adjacent cutting teeth 3;Wherein, the blade tooth part 1 is a hard piece, so that the cutting edge of each cutting tooth 3 is formed, and the blade body part 2 is connected with the blade tooth part 1 to form a blade.

[0034] Hard piece refers to the part made of hard material, and the blade tooth part 1 is made of hard material, so the performance of the blade tooth part 1 can be targetedly improved according to its function or use. For example: when the blade tooth part 1 cooperates with the trimming of hair, it needs to frequently contact the skin and needs relatively sharp edge, and the oil and sweat secreted by the skin have certain corrosive property. Therefore, the material hardness and corrosion resistance of the blade tooth part 1 are required, and the material with high hardness and corrosion resistance can be selected. Since the blade tooth part 1 and the blade body part 2 are independent, the overall material cost of the blade will not be obviously improved when the blade tooth part 1 is selected with high performance material, and the cutting sharpness and corrosion resistance of each cutting tooth 3 can be greatly improved, and the hair trimming performance and service life of the blade tooth part 1 can be improved.

[0035] And the blade body part 2 only assists the assembly of the blade tooth part 1, mainly plays a connecting role, and considering the cost, it can be made of non-metallic material with lower cost, so that the overall material cost of the blade can be greatly reduced, the overall weight of the blade can be reduced, the vibration feeling, working noise and surface temperature rise of the blade during use can be reduced, and the overall use comfort of the blade can be improved.

[0036] Since the cutter body 2 is made of non-metallic material, the non-metallic cutter body 2 is easily over-worn when the blade for trimming hair is in contact with the cutter body 2 and reciprocates at high frequency. To this end, at least one wear-resistant body 5 made of different material from the cutter body 2 is arranged on the cutter body 2, the wear-resistant body 5 is connected with the cutter body 2 as a whole and the surface thereof can be in contact with the cooperating component; by arranging the wear-resistant body 5 on the cutter body 2, the blade for trimming hair can be directly in contact with the wear-resistant body 5 during assembly, so that the non-metallic cutter body 2 is not worn and the service life of the cutter body 2 is prolonged.

[0037] To ensure the hair trimming performance of the cutter tooth part 1, the cutter tooth part 1 is made of metal or ceramic hard material, so that the edges of each cutting tooth 3 in the cutter tooth part 1 form sharp cutting edges. The cutter tooth part 1 is made of metal or ceramic, which not only makes the edges of each cutting tooth 3 form sharp edges, but also ensures the hair trimming performance and corrosion resistance of the cutter tooth part 1. In actual production process, whether metal or ceramic is selected can be determined according to user demand, and the present embodiment is not limited further.

[0038] To reduce the overall cost of the blade and facilitate the production and assembly of the blade, the cutter body 2 is made of thermoplastic plastic material. The cost of plastic is much lower than that of metal, and the density of plastic is also smaller than that of metal. The cutter body 2 made of plastic not only reduces the overall material cost of the blade, but also greatly reduces the overall weight of the blade, thereby reducing the overall vibration feeling, working noise and surface temperature rise of the blade in use, and improving the use comfort of the blade.

[0039] In the production process of the cutter body 2, the cutter tooth part 1 can be integrally formed with the cutter body 2 by secondary injection molding, which has relatively high production efficiency, but has the disadvantages of increasing the manufacturing difficulty of the injection mold and improving the manufacturing cost of the injection mold. Of course, the cutter body 2 can also be directly molded by an injection molding machine, and then connected as a whole by buckling, bonding, riveting or welding. Other ways known to those skilled in the art can also be selected for fixed connection, and the present embodiment is not limited further.

[0040] To reduce the overall cost of the blade, the cutter body 2 can also be made of wood or bamboo material, and then connected with the cutter tooth part 1 as a whole by buckling, bonding, riveting or screwing. Since wood or bamboo material will mildew after a period of use, it is preferred to make the cutter body 2 of plastic.

[0041] In order to reduce the frictional resistance, the wear-resistant body 5 is at least provided with one piece of ceramic part, and in actual production, the ceramic part is provided with two pieces, so that the space and volume of the wear-resistant body 5 can be reduced, and the overall weight of the blade can be reduced. In order to facilitate the installation of the wear-resistant body 5, a groove for installing the wear-resistant body 5 is arranged in the blade body 2, and the wear-resistant body 5 is installed in the groove and the surface thereof can be in contact with the cooperating blade. Since the wear-resistant body 5 is made of ceramic, the surface of the wear-resistant body 5 is in contact with the cooperating blade, so that the frictional resistance between the two can be effectively reduced, and the ceramic wear-resistant body 5 and the plastic blade body 2 can reduce the heat transfer, thereby reducing the surface temperature rise of the blade during operation.

[0042] As shown in Figures 4-8 In order to avoid the high surface temperature rise of the blade tooth part 1 due to the frictional resistance when cutting hair, and to prevent the tooth tips of the cutting teeth 3 in the blade tooth part 1 from being too sharp to pierce the skin, a protective layer 6 connected with the blade tooth part 1 is arranged outside the blade tooth part 1, and the protective layer 6 covers at least the outer surface of the blade tooth part 1 in contact with the skin. By arranging the protective layer 6 in the blade tooth part 1, the direct contact between the outer surface of the blade tooth part 1 and the skin is blocked, the heat insulation effect is achieved, the skin is prevented from being scalded, and the use comfort of the blade is improved. At the same time, the skin is prevented from being pierced when the cutting teeth 3 are inserted into the hair, and the use safety of the blade is improved.

[0043] In order to maximize the heat insulation and protection performance of the protective layer 6, the blade tooth part 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, and the protective layer 6 at least covers the tooth surface 11 and the tooth end face 12 of the blade tooth part 1 and is connected with the tooth surface 11 and the tooth end face 12 integrally. By covering the tooth surface 11 of the blade tooth part 1 and the tooth end face 12 of each cutting tooth 3 with the protective layer 6, in use, the tooth surface 11 is blocked by the protective layer 6, which can effectively prevent the surface temperature of the blade tooth part 1 from being dissipated outward, and the heat insulation effect is improved. When the tooth end face 12 of each cutting tooth 3 is covered with the protective layer 6, when the cutting teeth 3 of the blade tooth part 1 are inserted into the hair, the tooth end face 12 of the cutting teeth 3 can be prevented from directly contacting the skin, which not only plays a role in isolating heat, but also has a protection effect, thereby ensuring the use comfort and safety of the blade tooth part 1.

[0044] In order to reduce the frictional resistance of the blade when reciprocating and swinging to cut the hair, reduce the temperature rise of the cutter tooth part 1 and reduce the surface temperature of the cutter tooth part 1, a cutting working surface 13 is further formed in the cutter tooth part 1 and is in contact with the cooperating blade. The cutting working surface 13 is arranged opposite to the tooth surface 11 in the cutter tooth part 1. The protective layer 6 covers at least the tooth tip of each cutting tooth 3 in the cutter tooth part 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 cutter tooth part 1 in contact with the skin or the area in contact with the cooperating blade, and then the protective layer 6 is removed by grinding the entire surface or the area in contact with the cooperating blade. In this way, the cutting working surface 13 is formed on the cutter tooth part 1, and the distance between the side of each cutting tooth 3 in the cutter tooth part 1 (i.e. the tooth tip of the cutting tooth 3) and the grinding wheel is controlled. The protrusion 61 higher than the cutting working surface 13 is formed at the side of each cutting tooth 3 in the cutter tooth part 1 (i.e. the tooth tip of the cutting tooth 3). By using the protrusion 61, the end of the cutting tooth 3 can be prevented from directly contacting the skin, so as to prevent the skin from being scalded and improve the comfort of use. At the same time, the protrusion 61 can also play a protective role, so as to prevent the skin from being pricked by the too sharp tooth tip of the cutting tooth 3 and improve the safety of use of the cutter tooth part 1 when contacting the skin. In addition, the protrusion 61 can also isolate the cutting tooth 3 in the cooperating blade from contacting the skin, so as to prevent the cutting tooth 3 in the cooperating blade from cutting the skin. Secondly, by grinding the cutter tooth part 1 to form the cutting working surface 13 relative to the surface in contact with the skin, the surface flatness of the cutting working surface 13 can be effectively improved, the frictional resistance when cutting the hair by reciprocating can be reduced, the surface temperature rise of the cutter tooth part 1 can be effectively reduced, and the surface temperature of the cutter tooth part 1 can be reduced.

[0045] In order to improve the connection firmness of the protective layer 6 and the cutter tooth part 1, a tooth end surface 12 of each cutting tooth 3 in the cutter tooth part 1 is provided with a anti-disengagement structure 7. The cross-sectional area of the anti-disengagement structure 7 is less than that of the tooth end surface 12 of each cutting tooth 3. The protective layer 6 is covered outside the anti-disengagement structure 7 and is connected with each cutting tooth 3 as a whole. By setting the cross-sectional area of the anti-disengagement structure 7 to be less than that of the tooth end surface 12 of each cutting tooth 3, when the protective layer 6 is covered on the tooth end surface 12 of each cutting tooth 3, the protective layer 6 can be flush with the two sides of each cutting tooth 3, so as to prevent the protective layer 6 from occupying the space of the opening of the hair guide groove 4 and affecting the introduction of the hair. In actual production, the anti-disengagement structure 7 is in a stepped shape or is provided in a sheet shape as an open groove, as shown in FIG. 6. The anti-disengagement structure 7 is used to improve the connection firmness of the protective layer 6 and the cutter tooth part 1. As long as the anti-disengagement structure 7 can play a role in connection firmness, any structure can be used. In the embodiment, only two structures easy to produce are given, and it is not meant that only the structure shown in FIG. 6 can be used. Necessary improvements can be made according to the actual product structure. Figures 6-7 Figures 6-7

[0046] ​​Under the premise of preventing scalding the skin and avoiding the skin being scratched, the protective layer 6 is a thermoplastic piece with flexibility and elastic deformation, preferably PP thermoplastic, and 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 cutter 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 have a more comfortable skin feeling, and improve the use comfort of the blade. Secondly, PP also has certain high-temperature resistance and corrosion resistance. It not only can play a role in blocking heat to prevent the surface temperature of the cutter tooth part 1 from rising and scalding the skin, and improve the use safety of the blade; at the same time, after the blade is used, water is often used to clean the cutter tooth part 1. Better corrosion resistance can also avoid the erosion of the protective layer 6 by the oil or sweat secreted by the skin, improve the sanitary safety of the cutter tooth part 1 and prolong the service life of the cutter tooth part 1.

[0047] The above embodiments should not be regarded as limiting the utility model, but any improvement based on the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. A cost-reduced multi-material composite blade, characterized by The cutting blade comprises a cutting tooth part (1) and a cutting body part (2) which are independent of each other, a plurality of cutting teeth (3) are arranged in the cutting tooth part (1), and a guide groove (4) is formed between adjacent cutting teeth (3); wherein the cutting tooth part (1) is a hard part so that sharp cutting edges are formed at edges of the cutting teeth (3), the cutting body part (2) is a non-metal part which is connected with the cutting tooth part (1) to form the cutting blade, and at least one wear-resistant body (5) which is made of a material different from that of the cutting body part (2) is arranged on the cutting body part (2) and is connected with the cutting body part (2) and can contact a matching part.

2. The reduced cost multi-material composite blade of claim 1, wherein The cutting tooth part (1) is a metal or ceramic hard part, so that sharp cutting edges are formed at edges of the cutting teeth (3) in the cutting tooth part (1).

3. The reduced cost multi-material composite blade of claim 1, wherein The cutting body part (2) is a thermoplastic part which is integrally formed with the cutting tooth part (1) by secondary injection molding. The cutting body part (2) is a thermoplastic part which is integrally formed with the cutting tooth part (1) by hot melt injection molding.

4. The reduced cost multi-material composite blade of claim 1, wherein The cutting body part (2) is a wooden or bamboo part which is integrally connected with the cutting tooth part (1) by buckling, bonding, riveting or screwing.

5. The reduced cost multi-material composite blade of claim 1, wherein The wear-resistant body (5) is a ceramic part which is arranged in a groove in the cutting body part (2) and can contact a matching cutting blade.

6. The reduced cost multi-material co-moulded blade of claim 1, wherein A protective layer (6) is arranged on the cutting tooth part (1) and is integrally connected with the cutting tooth part (1), and the protective layer (6) covers at least an outer surface of the cutting tooth part (1) which contacts the skin.

7. The reduced cost multi-material co-moulded blade of claim 6, wherein The cutting tooth part (1) comprises a tooth surface (11) which contacts the skin and a tooth end surface (12) which is formed at a tooth end of each cutting tooth (3), and the protective layer (6) covers and is integrally connected with at least the tooth surface (11) and the tooth end surface (12) in the cutting tooth part (1).

8. The reduced cost multi-material composite blade of claim 7, wherein A cutting working surface (13) is formed in the cutting tooth part (1) and is arranged opposite to the tooth surface (11) in the cutting tooth part (1), and the protective layer (6) covers and is integrally connected with at least a tooth tip of each cutting tooth (3) in the cutting tooth part (1) and forms a protrusion (61) which is higher than the cutting working surface (13).

9. The reduced cost multi-material composite blade of claim 6, wherein The tooth end surface (12) of each cutting tooth (3) in the cutting tooth part (1) is provided with an anti-disengagement structure (7), and the protective layer (6) covers and is integrally connected with each cutting tooth (3) outside the anti-disengagement structure (7).

10. The reduced cost multi-material co-moulded blade of claim 6, wherein The protective layer (6) is a thermoplastic part which has flexibility and can be elastically deformed.

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