Double-layered circular knife structure and shaver

Abstract

The utility model discloses a double -deck round knife structure and safety razor, double -deck round knife structure includes first rotating disc, second rotating disc and knife shaft, and first rotating disc has the integrative cutting of multiple inner ring horizontal knives and multiple middle circle horizontal knives with it, and second rotating disc has the integrative cutting of multiple outer ring horizontal knives with it, and the knife shaft is provided with the clamping slot along the circumferential, and the center hole of first rotating disc and second rotating disc is connected in clamping slot, to limit both in axial and radial, wherein, first rotating disc and second rotating disc are equipped with the connecting part and the coordination department of circumferential positioning cooperation respectively, are used in positioning, and the knife shaft injection molding is in the center hole of both, this scheme can limit first rotating disc and second rotating disc activity in axial and radial, and under the circumferential limit of connecting part and coordination department, effectively prevent first rotating disc and second rotating disc from producing the deviation, and service life greatly promotes. In addition, the double -deck round knife structure of this scheme has three circle blades, and the shaving efficiency is higher.

Description

Technical Field

[0001] This utility model belongs to the field of razor technology, and particularly relates to a double-layer circular blade structure and a razor. Background Technology

[0002] An electric shaver consists of a stainless steel mesh cover, inner blades, a miniature motor, and a housing. The mesh cover, which is the fixed outer blade, has many holes through which beard hairs can be inserted. The miniature motor is powered by electricity, which rotates the inner blades and uses a shearing principle to cut the beard hairs inserted into the holes.

[0003] Most rotary shavers currently use circular blades, which have several circumferentially distributed horizontal blades. These horizontal blades are mostly cut from a single layer of metal sheet, such as the double-ring circular blade structure disclosed in patent 201611005660.4. The layout of horizontal blades cut from this single layer of sheet is limited. If double or triple ring horizontal blades are to be arranged, the strength and number of blades will be greatly reduced.

[0004] The double-ring circular blade structure disclosed in patent 202421509324.3 forms three rings of horizontal blades by welding two layers of sheets together. However, due to differences in mass distribution and stress intensity, the two layers of sheets are prone to misalignment, leading to welding failure. Utility Model Content

[0005] The main purpose of this utility model is to propose a double-layer circular blade structure and razor, which aims to solve the technical problems of limited cross blade layout, low service life and shaving efficiency of single-layer sheet cutting, and easy connection failure after double-layer sheet welding.

[0006] To achieve the above objectives, this utility model proposes a double-layer circular knife structure, which includes:

[0007] The first rotating disk has multiple inner ring cross blades and multiple middle ring cross blades integrally cut and formed therewith;

[0008] The second rotating disk has multiple outer ring cross blades integrally cut into shape therewith and multiple reinforcing ribs extending circumferentially; and,

[0009] The cutter shaft has a groove along its circumference, and the center holes of the first rotating disk and the second rotating disk are both connected to the groove to limit both in the axial and radial directions.

[0010] The first rotating disk and the second rotating disk are respectively provided with a connecting part and a matching part for circumferential positioning, so that after the two are positioned, the cutter shaft is injection molded into the center hole of the two.

[0011] Optionally, the connecting part is a plurality of convex ribs formed circumferentially on the first rotating disk, and the matching part is a plurality of small holes arranged circumferentially on the first rotating disk.

[0012] Optionally, there are three connecting parts and three matching parts, which are evenly distributed along the circumference.

[0013] Optionally, the center holes of the first rotating disk and the second rotating disk are provided with a bayonet, the bayonet groove is annular, and the bayonet groove is provided with a protrusion that engages with the bayonet.

[0014] Optionally, the inner ring cross blade, the middle ring cross blade, and the outer ring cross blade are all evenly distributed circumferentially.

[0015] Optionally, the number of horizontal cutters in the inner circle is n, the number of horizontal cutters in the middle circle is 2n, and the number of horizontal cutters in the outer circle is 3n, where n is a positive integer.

[0016] Optionally, the number of horizontal cutters in the inner ring is 3, the number of horizontal cutters in the middle ring is 6, and the number of horizontal cutters in the outer ring is 9.

[0017] Optionally, the second rotating disk has three reinforcing ribs evenly distributed along the circumference.

[0018] Optionally, each of the reinforcing ribs is located on the outside of the first rotating disk and is disposed close to the outer periphery of the first rotating disk.

[0019] This utility model also proposes a razor, which includes the above-mentioned double-layer circular blade structure.

[0020] In this invention, the positioning connection is achieved through the connecting part and the matching part of the first and second rotating disks. The double-layered, three-ringed circular blade, after positioning and stacking, is then placed on a mold and injection-molded to form the blade shaft. This allows the central holes of the first and second rotating disks to engage with the grooves of the blade shaft, restricting their movement axially and radially. Simultaneously, the circumferential limiting effect of the connecting part and the matching part effectively prevents the first and second rotating disks from shifting, significantly extending their service life. Furthermore, the double-layered circular blade structure of this invention features three rings of blades, resulting in higher shaving efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1A three-dimensional structural diagram of an embodiment of the double-layer circular knife structure provided by this utility model;

[0023] Figure 2 for Figure 1 An exploded view from a one-way perspective;

[0024] Figure 3 for Figure 1 A bottom-view perspective;

[0025] Figure 4 A perspective structural diagram of an embodiment of the cutter head assembly provided by this utility model.

[0026] Labeling Explanation: Double-layer circular cutter structure - 100, First rotating disk - 1, Inner ring horizontal cutter - 11, Middle ring horizontal cutter - 12, Raised rib - 13, Second rotating disk - 2, Outer ring horizontal cutter - 21, Reinforcing rib - 22, Small hole - 23, Cutter shaft - 3, Slot - 31, Protrusion - 32, Center hole - 4, Bayonet - 41, Cutter head assembly - 200, Mesh cover - 201.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] To better describe and illustrate the embodiments of this application, reference may be made to one or more accompanying drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the utility model creation, the embodiments or preferred embodiments of this application, or the preferred methods described herein.

[0030] In the description of this utility model, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate that the device referred to must have a specific orientation or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0032] Most rotary shavers currently use circular blades with several circumferentially distributed transverse blades. These transverse blades are mostly cut from a single layer of metal sheet, such as the double-ring circular blade structure disclosed in patent 201611005660.4. This single-layer sheet cutting method limits the layout of transverse blades; if double or triple ring transverse blades are to be used, the strength and number of blades would be significantly reduced. The double-ring circular blade structure disclosed in patent 202421509324.3 forms three rings of transverse blades by welding two layers of sheet together, but due to differences in mass distribution and stress, misalignment can easily occur between the two layers, leading to weld failure.

[0033] Therefore, this utility model provides a double-layer circular knife structure. Figures 1-3 For an embodiment of the double-layer circular blade structure of the hair dryer provided by this utility model, please refer to [link / reference]. Figures 1-3 The double-layer circular cutter structure 100 includes a first rotating disk 1, a second rotating disk 2, and a cutter shaft 3.

[0034] Specifically, the first rotating disk 1 and the second rotating disk 2 are approximately circular in structure, both formed from metal sheets by milling. The diameter of the first rotating disk 1 is slightly smaller than that of the second rotating disk 2. Both the first rotating disk 1 and the second rotating disk 2 have a central hole 4 of the same size cut in their center. After the first rotating disk 1 and the second rotating disk 2 are stacked, their central holes 4 can be connected to the slots 31 of the cutter shaft 3. In this embodiment, the slots 31 are annularly formed on the outer wall of the cutter shaft 3, and their outlines are adapted to the central hole 4. By tightly fitting the slots 31 with the central holes 4 of the first rotating disk 1 and the second rotating disk 2 respectively, the axial and radial movements of the first rotating disk 1 and the second rotating disk 2 are restricted.

[0035] The first rotating disk 1 has a circular body that is machined with multiple horizontal blades, and then extruded inward to form multiple inner ring horizontal blades 11 and multiple middle ring horizontal blades 12. The second rotating disk 2 has a circular body that is machined and extruded to form multiple horizontal blades and multiple outer ring horizontal blades 21. It should be understood that the inner, middle, and outer ring horizontal blades 21 are located on the same side of both rotating disks and are distributed in three rings.

[0036] Please see Figure 2The first rotating disk 1 is provided with a connecting part, and the second rotating disk 2 is provided with a matching part. When the first rotating disk 1 and the second rotating disk 2 are stacked, the connecting part and the matching part can form a positioning fit to prevent relative rotation between the two. After positioning fit, the relative positions of each ring of cross blades are maintained in optimal distribution, so as to facilitate subsequent injection molding connection with the cutter shaft 3.

[0037] When the first rotating disk 1 and the second rotating disk 2 rotate coaxially, certain stresses are generated between the layers. If this stress is too concentrated (especially when there is uneven contact with the shaving blades), it will reduce the balance of the entire circular blade structure 100, resulting in poor shaving efficiency. Furthermore, the reduced balance will cause fluctuations in the outer edge of the first rotating disk 1 and the second rotating disk 2. These ripples, over time, will affect the strength of the second rotating disk 2, causing deformation and consequently affecting the shaving efficiency of the outer ring blades 21. Please refer to [link / reference]. Figure 1 and 2 In this embodiment, the surface of the second rotating disk 2 is processed with a plurality of arc-shaped reinforcing ribs 22 extending circumferentially. The reinforcing ribs 22 protrude outward in a generally axial direction to disperse the stress and wave force from the outer edge of the first rotating disk 1, effectively improving the strength of the second rotating disk 2 and the shaving efficiency of the outer ring blades 21.

[0038] Further, please refer to Figure 2 In a preferred embodiment of the present invention, the second rotating disk 2 is provided with three evenly distributed reinforcing ribs 22. The reinforcing ribs 22 are located on the outside of the first rotating disk 1 and are set close to the outer periphery of the first rotating disk 1, which can better reduce the wave force of the outer edge of the first rotating disk 1 on the second rotating disk 2 at this position.

[0039] In this embodiment, the positioning connection is achieved through the connecting part and the matching part of the first rotating disk 1 and the second rotating disk 2. Then, the double-layered three-ring circular blade, after positioning and stacking, is placed on a mold and injection molded to form the blade shaft 3. This allows the center holes 4 of the first rotating disk 1 and the second rotating disk 2 to engage with the grooves 31 of the blade shaft 3, restricting movement in the axial and radial directions. Simultaneously, the circumferential limiting by the connecting part and the matching part effectively prevents the first rotating disk 1 and the second rotating disk 2 from shifting, significantly improving their service life. Furthermore, the double-layered circular blade structure 100 of this solution has three rings of blades, resulting in higher shaving efficiency and higher blade strength than a single-layered three-ring blade structure.

[0040] To better prevent the first rotating disk 1 from rotating relative to the second rotating disk 2, please refer to [link / reference]. Figure 2 and 3In one embodiment of this utility model, the connecting part consists of three circumferentially formed ribs 13 on the first rotating disk 1, and the matching part consists of three circumferentially arranged small holes 23 on the first rotating disk 1. The ribs 13 and small holes 23 are evenly arranged and correspondingly positioned circumferentially. When the first rotating disk 1 and the second rotating disk 2 are stacked together, each rib 13 can be connected to the small hole 23 one by one, and then the shape of the cutter shaft 3 is injection molded on the mold. At this time, the cutter shaft 3 can be tightly fitted to the central hole 4 of the first rotating disk 1 and the second rotating disk 2.

[0041] Of course, in other embodiments, the positions of the rib 13 and the small hole 23 can be interchanged. In addition, the connecting part and the matching part are not limited to the matching relationship between the rib 13 and the small hole 23; for example, a locking block and a groove can also achieve circumferential positioning.

[0042] To prevent the first rotating disk 1 and the second rotating disk 2 from rotating relative to the cutter shaft 3, please refer to [link / reference needed]. Figure 2 In one embodiment of this utility model, the center hole 4 of the first rotating disk 1 and the second rotating disk 2 are each provided with three slots 41. The annular slot 31 of the cutter shaft 3 is provided with a protrusion 32 designed with the shape of the slot 41. When the cutter shaft 3 is injection molded in the center hole 4, the slots 41 and the protrusion 32 are engaged with each other, thereby limiting the first rotating disk 1 and the second rotating disk 2 in the circumferential direction relative to the cutter shaft 3.

[0043] Please see Figure 1 and 2 In one embodiment of this invention, the inner ring cross blade 11, the middle ring cross blade 12, and the outer ring cross blade 21 are all evenly distributed circumferentially. Furthermore, to improve sharpness during shaving, the blades of the cross blades 21 extend approximately radially, providing the greatest shearing force when the double-layer circular blade structure 100 rotates. Of course, in other embodiments, the blades may be offset radially or slightly curved to better receive and cut the beard.

[0044] Please see Figure 2 In one embodiment of this utility model, the number of horizontal blades 21 in the inner circle is n, the number of horizontal blades 21 in the middle circle is 2n, and the number of horizontal blades 21 in the outer circle is 3n, where n is a positive integer. This design ensures that all horizontal blades 21 are evenly distributed. In this embodiment, the number of horizontal blades 21 in the inner circle is 3, the number of horizontal blades 21 in the middle circle is 6, and the number of horizontal blades 21 in the outer circle is 9. Of course, the implementation of this utility model is not limited to this; the number of horizontal blades 21 in the inner circle can also be 4, the number of horizontal blades 21 in the middle circle can also be 8, and the number of horizontal blades 21 in the outer circle can also be 12, which will not be listed here.

[0045] This utility model also proposes a cutter head assembly. Figure 4 For an embodiment of the cutter head assembly provided by this utility model, please refer to [link / reference].Figure 4 The cutter head assembly 200 employs the double-layer circular cutter structure 100 of this embodiment. Furthermore, the cutter head assembly 200 also includes a mesh cover 201. In other embodiments of the cutter head assembly, multiple double-layer circular cutter structures 100 and multiple mesh covers, as well as mounting brackets for fixing the circular cutter structures and mesh covers, are included.

[0046] In addition, this utility model also proposes a razor that adopts the double-layer circular blade structure 100 of this embodiment, especially the aforementioned blade head assembly 200.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A double-layer circular knife structure, characterized in that, include: The first rotating disk has multiple inner ring cross blades and multiple middle ring cross blades integrally cut and formed therewith; The second rotating disk has multiple outer ring cross blades integrally cut and formed therewith, and multiple reinforcing ribs extending circumferentially; as well as, The cutter shaft has a groove along its circumference, and the center holes of the first rotating disk and the second rotating disk are both connected to the groove to limit both in the axial and radial directions. The first rotating disk and the second rotating disk are respectively provided with a connecting part and a matching part for circumferential positioning and fitting, so that after positioning, the cutter shaft is injection molded into the center hole of the two.

2. The double-layer circular knife structure as described in claim 1, characterized in that, The connecting part consists of multiple convex ribs formed circumferentially on the first rotating disk, and the matching part consists of multiple small holes arranged circumferentially on the first rotating disk.

3. The double-layer circular knife structure as described in claim 1, characterized in that, There are three connecting parts and three matching parts, which are evenly distributed along the circumference.

4. The double-layer circular knife structure as described in claim 1, characterized in that, Both the first rotating disk and the second rotating disk have a bayonet in the center hole. The bayonet groove is annular and has a protrusion that engages with the bayonet.

5. The double-layer circular knife structure as described in claim 1, characterized in that, The inner, middle, and outer ring cross blades are all evenly distributed circumferentially.

6. The double-layer circular knife structure as described in claim 5, characterized in that, The number of horizontal cutters in the inner circle is n, the number of horizontal cutters in the middle circle is 2n, and the number of horizontal cutters in the outer circle is 3n, where n is a positive integer.

7. The double-layer circular knife structure as described in claim 6, characterized in that, The number of horizontal cuts in the inner circle is 3, the number of horizontal cuts in the middle circle is 6, and the number of horizontal cuts in the outer circle is 9.

8. The double-layer circular knife structure as described in claim 1, characterized in that, The second rotating disk has three reinforcing ribs evenly distributed along the circumference.

9. The double-layer circular knife structure as described in claim 1, characterized in that, Each of the reinforcing ribs is located on the outside of the first rotating disk and is disposed close to the outer periphery of the first rotating disk.

10. A razor, characterized in that, The razor includes the double-layer circular blade structure as described in any one of claims 1-9.

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