A method for manufacturing a moving knife, the moving knife, a knife head assembly and a nasal hair trimmer

Abstract

The application relates to the field of hair trimmers, and provides a manufacturing method of a moving blade, the moving blade, a cutter head assembly and a nasal hair trimmer. The manufacturing method comprises the following steps: S100, punching a stainless steel sheet to obtain a first blank; S200, bending the first blank to form a second blank, wherein the second blank comprises a connecting body and a bent body with an included angle A; S300, punching the bent body to remove a first interference part on the bent body, thereby obtaining a third blank; and S400, bending the third blank to make the included angle between the connecting body and the bent body be B, and B is greater than A, thereby obtaining a fourth blank. The moving blade is manufactured by using the manufacturing method of the moving blade. The cutter head assembly comprises a mounting seat, a fixed blade and the moving blade. The nasal hair trimmer comprises the moving blade or the cutter head assembly. According to the application, the moving blade is bent twice, the sharpness of the moving blade is ensured, the blade edge has sufficient strength, the service life of the moving blade is ensured, the friction noise between the moving blade and the fixed blade is reduced, and the use experience is improved.

Description

Technical Field

[0001] This application relates to the field of hair trimmers, and in particular to a method for manufacturing a moving blade, the moving blade, a blade head assembly, and a nose hair trimmer. Background Technology

[0002] Nasal hair trimmers, especially rotary nasal hair trimmers, use an open slit to allow nasal hairs to enter a specific area of ​​a cylindrical fixed blade, which then trims the hairs in conjunction with a moving blade. However, conventional moving blades are formed through a series of processes: punching, forming (bending), and then punching again. If the bending angle of the blank is too small during forming, the moving blade's cutting edge will have a larger angle and lower sharpness after the second punching. Conversely, if the bending angle is increased, the strength of the moving blade's cutting edge will decrease after the second punching, affecting its lifespan. In addition to these issues, current nasal hair trimmers have a large contact area between the moving blade and the inner wall of the fixed blade, resulting in significant frictional noise during rotation, all of which severely impact the user experience. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a method for manufacturing a moving blade, the moving blade itself, a blade head assembly, and a nose hair trimmer. This method involves two bending operations on the blank, ensuring both the sharpness of the moving blade and sufficient strength of the cutting edge, thus extending its service life. It also reduces frictional noise between the moving and fixed blades, improving the user experience. Compared to traditional methods, this method only adds a second bending step, resulting in lower manufacturing costs, but significantly improves the blade's sharpness, reduces frictional noise, and greatly enhances the user experience. The technical solution adopted in this application is as follows:

[0004] A method for manufacturing a moving blade, the moving blade being used in a nose hair trimmer, comprising the steps of:

[0005] S100 stainless steel sheet is punched to obtain the first blank;

[0006] S200 bends the first blank to form a second blank, the second blank comprising a connecting body and a bent body at an angle A;

[0007] S300 punches the bent body to remove the first interference portion on the bent body and obtain a third blank;

[0008] S400 bends the third blank so that the angle between the connector and the bent body is B, and B is greater than A, to obtain the fourth blank.

[0009] This method of manufacturing moving blades involves bending the blank twice, ensuring both the sharpness of the moving blade and sufficient strength of its cutting edge, thus extending its service life. It also reduces frictional noise between the moving and stationary blades, improving the user experience. Compared to traditional methods, this method only adds a second bending step, resulting in lower production costs, but significantly improves the blade's sharpness, reduces frictional noise, and greatly enhances the user experience.

[0010] In some implementations, the range of A is 120°-180°.

[0011] The range of A is controlled between 120° and 180°, which facilitates the re-punching of the bent body in step S300, that is, it facilitates the removal of the first interference part. It also facilitates the bending of the third blank in step S400, that is, it facilitates the shaping of the third blank in step S400, so that the angle between the connecting body and the bent body changes from A to B.

[0012] In some implementations, the range of A is 140°-155°.

[0013] The larger A is, the easier it is to punch the bent body again in step S300, but it is not conducive to bending (shaping) the third blank in step S400. The difficulty of achieving the desired effect when bending the third blank increases. Controlling A within the range of 140°-155° not only makes the punching of the bent body in step S300 go smoothly, but also makes it easier to achieve the desired effect when bending the third blank.

[0014] In some implementations, B is 5°-25° larger than A, and B is not greater than 180°.

[0015] B is 5°-25° larger than A, which can ensure the sharpness of the moving blade while also giving the moving blade edge sufficient strength, thus ensuring the service life of the moving blade and reducing frictional noise between the moving blade and the stationary blade.

[0016] In some implementations, B is 8°-13° larger than A.

[0017] The greater the difference between B and A, the greater the risk of poor blade sharpness. The smaller the difference between B and A, the weaker the blade edge strength. When the angle between B and A is controlled between 8° and 13°, the risk of poor blade sharpness is small, and the blade edge strength is sufficient.

[0018] On the other hand, this application provides a moving blade for a nose hair trimmer, the moving blade being manufactured using the aforementioned moving blade manufacturing method.

[0019] On the other hand, this application also provides a blade assembly for a nose hair trimmer. The blade assembly includes a mounting base, a cylindrical fixed blade, and two aforementioned movable blades. The two movable blades are mounted on the mounting base, and the fixed blade is sleeved outside the movable blades. An elastic element is provided between the two movable blades so that the movable blades can move relative to the mounting base within a preset range. The movable blades can rotate with the mounting base to trim nose hairs.

[0020] In some embodiments, when the fixed blade is sleeved outside the movable blade, the inner wall of the fixed blade will push against the cutting edge of the movable blade along the radial direction of the fixed blade, and the pushing distance D is controlled between 0mm and 0.9mm.

[0021] The larger the pushing distance D, the greater the increase in motor current when the motor drives the mounting base to rotate, and the greater the risk of the moving blade jamming. The smaller the pushing distance D, the less the pushing force between the moving blade and the fixed blade will become as the blade assembly is used, and the stronger the pulling sensation on the hair when the moving blade is cutting it will be, and the greater the pain felt by the user. Controlling the pushing distance D between 0mm and 0.9mm allows the blade of the moving blade to contact the inner wall of the fixed blade, improving the cutting effect of the moving blade on the hair and reducing the risk of the moving blade jamming.

[0022] In some embodiments, the pushing distance D is controlled between 0.2 mm and 0.3 mm.

[0023] By controlling the pushing distance D within 0.2mm-0.3mm, the sharpness of the cutter head assembly can be ensured, while the probability of the moving cutter jamming is within the required range.

[0024] On the other hand, this application also provides a nose hair trimmer, including the aforementioned moving blade or blade head assembly.

[0025] The present application provides a method for manufacturing a moving blade, the moving blade itself, a blade assembly, and a nose hair trimmer, which have at least one of the following beneficial effects:

[0026] 1. This application provides a method for manufacturing a moving blade. This method involves bending the blank twice, ensuring both the sharpness of the moving blade and sufficient strength of its cutting edge, thus extending its service life, reducing frictional noise between the moving and fixed blades, and improving the user experience. Compared to traditional methods, this method only adds a second bending step, resulting in lower manufacturing costs, but significantly improves the sharpness of the moving blade, reduces frictional noise, and greatly enhances the user experience.

[0027] 2. The present application provides a method for manufacturing a moving blade, wherein the range of A is controlled within 120°-180°, which facilitates the re-punching of the bent body in step S300, that is, facilitates the removal of the first interference part, and also facilitates the bending of the third blank in step S400, that is, facilitates the shaping of the third blank in step S400, so that the included angle between the connecting body and the bent body changes from A to B;

[0028] 3. The manufacturing method of the moving blade provided in this application makes it easier to punch the bent body again in step S300, but it is not conducive to bending (shaping) the third blank in step S400. The difficulty of bending the third blank to achieve the expected effect increases. By controlling the range of A to 140°-155°, not only can the punching of the bent body be carried out smoothly in step S300, but it is also easier to achieve the expected effect of bending the third blank.

[0029] 4. The present application provides a method for manufacturing a moving blade, wherein B is 5°-25° larger than A, which can ensure the sharpness of the moving blade while also ensuring sufficient strength of the blade edge, thus guaranteeing the service life of the moving blade and reducing frictional noise between the moving blade and the fixed blade.

[0030] 5. The manufacturing method of the moving knife provided in this application is such that the greater the difference between B and A, the greater the risk of poor sharpness of the moving knife; the smaller the difference between B and A, the weaker the strength of the moving knife's cutting edge. When the angle between B and A is controlled between 8° and 13°, the risk of poor sharpness of the moving knife is small, and the strength of the moving knife's cutting edge is also sufficient.

[0031] 6. In the blade assembly provided in this application, the larger the pushing distance D, the greater the increase in motor current when the motor drives the mounting base to rotate, and the greater the risk of the moving blade jamming. The smaller the pushing distance D, the smaller the pushing force between the moving blade and the fixed blade will become as the blade assembly is used, and the stronger the pulling sensation on the hair when the moving blade cuts the hair, and the stronger the pain felt by the user. Controlling the pushing distance D to 0mm-0.9mm can make the blade of the moving blade abut against the inner wall of the fixed blade, improve the cutting effect of the moving blade on the hair, and reduce the risk of the moving blade jamming.

[0032] 7. The blade assembly provided in this application controls the pushing distance D to 0.2mm-0.3mm, which can make the blade assembly have good sharpness, while the probability of the blade jamming is within the required range. Attached Figure Description

[0033] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of a moving blade manufacturing method, the moving blade, the blade head assembly, and the nose hair trimmer:

[0034] Figure 1 This is a flowchart illustrating an embodiment of a method for manufacturing a moving blade according to this application;

[0035] Figure 2 This is a comparison diagram of cross-sectional view b of the cutter head assembly in the embodiment of this application and cross-sectional view a of the cutter head assembly in the prior art;

[0036] Figure 3 This is a comparison diagram of the state of the moving tool in each step of the moving tool manufacturing process in this application embodiment and the state of the moving tool in each step of the moving tool manufacturing process in the prior art;

[0037] Figure 4 These are the forms of each stage of the cutting process in the embodiments of this application;

[0038] Figure 5 This is a schematic diagram of the moving blade in an embodiment of this application;

[0039] Figure 6 This is a front view of the moving blade and mounting base assembled in an embodiment of this application;

[0040] Figure 7 This is a top view of the moving blade and the mounting base assembled in the embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the fixed blade in an embodiment of this application;

[0042] Figure 9 This is a cross-sectional view of the cutter head assembly in an embodiment of this application;

[0043] Explanation of icon numbers:

[0044] Moving blade 1, fixed blade 2, mounting base 3, stainless steel sheet 4, first blank 5, second blank 6, third blank 7, fourth blank 8, connecting body 9, bending body 10, cutting edge 11, first interference part 12, second interference part 13, angle A between connecting body and bending body after step S200, angle B between connecting body and bending body after step S400. Detailed Implementation

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0046] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0047] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0048] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] Current methods for manufacturing moving blades generally involve a first punching of a stainless steel sheet (or strip) to create the approximate shape of the moving blade 1, followed by bending (or forming), and then a second punching to remove the second interference portion 13, forming the cutting edge 11 of the moving blade 1. The manufacturing method provided in this application, however, refers to... Figure 1 , Figure 3 This method adds an extra step compared to existing technologies, involving two bending processes. The first bend is more pronounced, while the second bend is in the opposite direction, reducing the final bending degree of the moving blade 1. In the manufacturing method provided in this application, the first bend is more pronounced to remove the first interference portion 12 of the moving blade 1 after a second punching, thinning the side of the moving blade 1 closest to the fixed blade 2, resulting in a smaller cutting edge angle 11 of the moving blade 1 (compared to the cutting edge angle 11 of the moving blade 1 in existing technologies). (Reference) Figure 2 , Figure 3 In the manufacturing method provided in this application, the second bend is in the opposite direction of the first bend, which reduces the final bending degree of the moving knife 1. The purpose is to ensure the strength of the cutting edge 11 of the moving knife 1, and at the same time reduce the contact area (or friction area) between the cutting edge 11 of the moving knife 1 and the inner wall of the fixed knife 2 during the grinding stage or the use stage, thereby extending the service life of the moving knife 1 and reducing the friction noise between the moving knife 1 and the fixed knife 2.

[0051] The technical solution adopted in this application will be described in detail below:

[0052] refer to Figures 1-7 , Figure 9 This application provides a method for manufacturing a moving blade, the moving blade 1 being used in a nose hair trimmer, comprising the following steps:

[0053] S100 punched stainless steel sheet 4, to obtain the first blank 5;

[0054] S200 bends the first blank 5 to form the second blank 6, the second blank 6 including the connecting body 9 and the bending body 10 at an angle A;

[0055] S300 punches and bends the body 10 to remove the first interference portion 12 on the body 10 and obtains the third blank 7.

[0056] S400 bends the third blank 7 so that the angle between the connecting body 9 and the bent body 10 is B, and B is greater than A, to obtain the fourth blank 8.

[0057] Specifically, in order to highlight the advantages of the cutting tool manufacturing method in this application compared to existing technologies, the following is utilized: Figure 2 , Figure 3 For example, in the prior art, the angle between the connecting body 9 and the bent body 10 after the moving knife 1 is bent is B. This is consistent with the final angle B between the connecting body 9 and the bent body 10 in this application. Figure 2 , Figure 3 It is understood that, during use or grinding, the contact area between the cutting edge 11 of the moving knife 1 and the inner wall of the fixed knife 2, due to mutual wear between the moving knife 1 and the fixed knife 2, is smaller than that in the prior art. In other words, the frictional noise between the moving knife 1 and the fixed knife 2 manufactured by the method of this application is less than that between the moving knife 1 and the fixed knife 2 manufactured by the prior art. Furthermore, the cutting edge 11 of the moving knife 1 manufactured by the method of this application has a smaller cutting angle and better sharpness. Specifically, the fourth blank 8 can undergo some processing techniques, such as heat treatment or coating, to improve the finished quality of the moving knife 1.

[0058] In this embodiment, by bending the blank twice, the sharpness of the moving blade 1 is ensured, while also providing sufficient strength to the cutting edge 11, thus extending the service life of the moving blade 1, reducing frictional noise between the moving blade 1 and the fixed blade 2, and improving the user experience. Compared to traditional manufacturing methods, this moving blade manufacturing method only adds a second bending step, resulting in lower manufacturing costs, but significantly improves the sharpness of the moving blade 1, reduces frictional noise, and greatly enhances the user experience.

[0059] In one embodiment, A ranges from 120° to 180°.

[0060] In this embodiment, the range of A is controlled between 120° and 180°, which facilitates the re-punching of the bent body 10 in step S300, that is, facilitates the removal of the first interference part 12. It also facilitates the bending of the third blank 7 in step S400, that is, facilitates the shaping of the third blank 7 in step S400, so that the included angle between the connecting body 9 and the bent body 10 changes from A to B.

[0061] In one embodiment, A ranges from 140° to 155°.

[0062] In this embodiment, the larger A is, the easier it is to punch the bent body 10 again in step S300, but it is not conducive to bending (shaping) the third blank 7 in step S400. The difficulty of achieving the expected effect in bending the third blank 7 increases. Controlling the range of A to 140°-155° not only makes the punching of the bent body 10 in step S300 go smoothly, but also makes it easier to achieve the expected effect in bending the third blank 7.

[0063] In one embodiment, B is 5°-25° larger than A, and B is not greater than 180°.

[0064] In this embodiment, B is 5°-25° larger than A, which can ensure the sharpness of the moving blade 1 while also giving the cutting edge 11 of the moving blade 1 sufficient strength, thus ensuring the service life of the moving blade 1 and reducing the frictional noise between the moving blade 1 and the fixed blade 2.

[0065] In one embodiment, B is 8°-13° larger than A.

[0066] In this embodiment, the greater the difference between B and A, the greater the risk of poor sharpness of the moving blade 1; the smaller the difference between B and A, the weaker the strength of the cutting edge 11 of the moving blade 1. When the angle between B and A is controlled between 8° and 13°, the risk of poor sharpness of the moving blade 1 is small, and the strength of the cutting edge 11 of the moving blade 1 is also sufficient.

[0067] On the other hand, reference Figures 2-7 , Figure 9 This application provides a movable blade 1 for use in a nose hair trimmer, and the movable blade 1 is manufactured using the aforementioned method for manufacturing movable blade 1.

[0068] In this embodiment, since the moving knife 1 adopts the technical solution of the aforementioned embodiment, it has at least the beneficial effects brought about by the technical solution of the aforementioned embodiment, which will not be described in detail here.

[0069] On the other hand, reference Figures 5-9This application also provides a blade assembly for a nose hair trimmer. The blade assembly includes a mounting base 3, a cylindrical fixed blade 2, and two aforementioned movable blades 1. The two movable blades 1 are mounted on the mounting base 3, and the fixed blade 2 is sleeved outside the movable blades 1. An elastic element is provided between the two movable blades 1 so that the movable blades 1 can move relative to the mounting base 3 within a preset range. The movable blades 1 can rotate with the mounting base 3 to trim nose hairs.

[0070] In this embodiment, the specific structure of the moving blade 1 is the same as that in the previous embodiment. Since the blade assembly adopts the technical solution of the previous embodiment, it has at least the beneficial effects brought about by the technical solution of the previous embodiment, which will not be described in detail here.

[0071] refer to Figures 6-9 In one embodiment, when the fixed blade 2 is sleeved outside the movable blade 1, the inner wall of the fixed blade 2 will push against the blade of the movable blade 1 along the radial direction of the fixed blade 2, and the pushing distance D is controlled between 0mm and 0.9mm.

[0072] Specifically, before the fixed blade 2 is fitted onto the integral assembly of the moving blade 1 and the mounting base 3, the outer contour of the integral assembly of the moving blade 1 and the mounting base 3 is larger than that of the integral assembly after the fixed blade 2 is fitted onto the integral assembly of the moving blade 1 and the mounting base 3. In other words, when the fixed blade 2 is fitted onto the integral assembly of the moving blade 1 and the mounting base 3, the fixed blade 2 will compress the moving blade 1, causing the moving blade 1 to shift and the elastic element to undergo elastic deformation. The radial displacement of the moving blade 1 under the compression of the fixed blade 2 is the pushing distance D.

[0073] It is worth noting that the larger the pushing distance D, the greater the increase in motor current when the motor drives the mounting base 3 to rotate, and the greater the risk of the moving blade 1 getting stuck. The smaller the pushing distance D, the less the pushing force between the moving blade 1 and the fixed blade 2 will become as the blade assembly is used, and the stronger the pulling sensation on the hair when the moving blade 1 is cutting will be, and the greater the pain felt by the user. Controlling the pushing distance D between 0mm and 0.9mm allows the blade of the moving blade 1 to contact the inner wall of the fixed blade 2, improving the cutting effect of the moving blade 1 on the hair, and reducing the risk of the moving blade 1 getting stuck.

[0074] In one embodiment, the pushing distance D is controlled between 0.2mm and 0.3mm.

[0075] It is understandable that controlling the pushing distance D within 0.2mm-0.3mm can ensure good sharpness of the cutter head assembly, while keeping the probability of jamming of the moving cutter 1 within the required range.

[0076] On the other hand, this application also provides a nose hair trimmer, including the aforementioned moving blade 1 or blade assembly.

[0077] It is understood that the specific structure of the moving blade 1 or the blade assembly refers to the foregoing embodiment. Since the nose hair trimmer adopts the technical solution of the foregoing embodiment, it has at least the beneficial effects brought by the technical solution of the foregoing embodiment, which will not be described in detail here.

[0078] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for manufacturing a moving blade, said moving blade being used in a nose hair trimmer, characterized in that, Including the following steps: S100 stainless steel sheet is punched to obtain the first blank; S200 bends the first blank to form a second blank, the second blank including a connecting body and a bent body at an angle A, wherein A is not less than 120°; S300 punches the bent body to remove the first interference portion on the bent body and obtains a third blank; S400 bends the third blank so that the angle between the connector and the bent body is B, and B is greater than A, to obtain the fourth blank, wherein B is not greater than 180°.

2. The method for manufacturing a moving blade according to claim 1, characterized in that, The range of A is 140°-155°.

3. A method for manufacturing a moving blade according to any one of claims 1-2, characterized in that, B is 5°-25° larger than A.

4. The method for manufacturing a moving blade according to claim 3, characterized in that, B is 8°-13° larger than A.

5. A movable blade used in a nose hair trimmer, characterized in that, The moving blade is manufactured using the moving blade manufacturing method described in any one of claims 1-4.

6. A blade assembly for a nose hair trimmer, characterized in that, The device includes a mounting base, a cylindrical fixed blade, and two movable blades as described in claim 5; the two movable blades are mounted on the mounting base, the fixed blade is sleeved outside the movable blades, and an elastic element is provided between the two movable blades to allow the movable blades to move relative to the mounting base within a preset range; the movable blades can rotate with the mounting base to trim nose hairs.

7. A cutter head assembly according to claim 6, characterized in that, When the fixed blade is sleeved outside the moving blade, the inner wall of the fixed blade will push against the cutting edge of the moving blade along the radial direction of the fixed blade, and the pushing distance D is controlled between 0mm and 0.9mm.

8. A cutter head assembly according to claim 7, characterized in that, The pushing distance D is controlled between 0.2mm and 0.3mm.

9. A nose hair trimmer, characterized in that, It includes the moving blade as described in claim 5 or the blade assembly as described in any one of claims 6-8.

Images