A multifunctional small rotary shaving assembly

Abstract

The present invention discloses a multifunctional small-sized rotary shaving assembly, comprising a blade cover and a movable blade assembly, the movable blade assembly comprising a movable blade and a bracket for holding the movable blade, the blade cover comprising a cover head and a cover body which are integrated with each other, the cover head comprising a cover top and a cover wall connected to the outer side of the cover top, the cover top and the cover wall forming a cutting chamber for the movable blade to rotate inside, a plurality of hair feeding grooves which are connected to the inside and outside of the cover head are arranged on the cover head along the circumferential direction, the hair feeding grooves span from the cover top to the cover wall and penetrate the cover top longitudinally and the cover wall laterally at the same time, a trumpet hair guiding port which corresponds to the hair feeding groove and is used for guiding hair into the hair feeding groove is arranged at the turning connection between the cover top and the cover wall, the multifunctional small-sized rotary shaving assembly has the characteristics of simple structure, good hair feeding effect, high hair shaving efficiency and safe shaving, and can be simultaneously applied to eyebrow trimming, nose hair trimming, head engraving and the like.

Description

Technical field

[0001] This invention relates to a multifunctional, compact rotary shaving assembly. [Background Technology]

[0002] The human body has body hair in many parts. With the diversification of people's pursuit of beauty nowadays, there are eyebrow trimming, nose hair trimming, and even carving words and patterns on the top of the head by shaving the hair. This has led to the development of a variety of shaving tools for shaving body hair in different parts of the body.

[0003] There are hand-operated eyebrow trimmers, such as the manual shaving type. When trimming eyebrows at home, you need to look in a mirror and shave. Because the skin surface is uneven and you need to use your hand to scrape, it's difficult to control the shaving area. If you don't control your hand well, you either shave too much or too little, or even cut your skin. After the manual eyebrow trimmer, small rotary automatic cutting eyebrow trimmers appeared. These trimmers have eyebrow trimming heads, as shown in the technical solution in application number CN201821817498, entitled "An Eyebrow Trimming Tool Head Device". A small-radius, easily shaped head cover covers the first and second blades. Multiple straight grooves are set on the head cover along the circumference to allow the eyebrow hairs to enter. A rotating shaft drives the first and second blades to rotate inside the head cover to cut the eyebrows. Because eyebrows have a certain length and are soft, they are usually inserted using a straight groove structure. At the same time, individual hair inlets can be set at the top to allow hair roots that have been cut to enter the cutting area after most of their length has been removed, such as the blade head cover structure in patent CN201821817498. However, since the straight groove structure is more likely to be squeezed into the skin, in order to ensure safety and avoid cutting the skin, the width of the straight groove structure needs to be made smaller. A small straight groove width results in a small hair inlet, making it difficult to insert hair, which leads to the extremely poor hair insertion efficiency of existing rotary automatic eyebrow trimmers.

[0004] Existing rotary automatic eyebrow trimmers, in order to ensure the blades inside the head cover adhere tightly to the inner wall of the head cover and guarantee cutting sharpness, as shown in patent CN201821817498, typically have a first and second blade movably mounted on a rotating shaft. A blade spring elastically pushes the first and second blades to the side, pressing them against the inner wall of the head cover. Furthermore, the head cover is usually designed with a conical structure, with cutting areas on both the top plane and the conical side. Over time, the blades experience varying degrees of wear between the top and side cutting edges. Through the lateral pressure of the blade spring and the upward pressure of the lifting spring, the wear on the top and side cutting edges of the blades is compensated, ensuring cutting sharpness. However, the connection and installation structure of the first blade, second blade, blade spring, rotating shaft, and cutter head cover is very complex. The first blade, second blade, blade spring, and rotating shaft need to be manufactured separately. Moreover, the fit structure between the first blade, second blade, blade spring, and rotating shaft is complex, and the production cost of molds is high. During assembly, the first blade, second blade, and blade spring need to be installed in the guide rail slots on the rotating shaft. The first blade and second blade need to be held by hand to prevent the blade spring from popping them out loosely before slowly inserting them into the cutter head cover. The production process is complex and inconvenient.

[0005] There are nose hair trimmers, which are small scissors, and small rotary automatic nose hair trimmers have also been developed. The nose hair trimmer's blade head is structurally similar to that of an eyebrow trimmer, both using a small-radius blade cover with a rotating cutting component inside. However, an eyebrow trimmer cannot be used to trim nose hairs because nose hairs grow along the inner wall of the nasal cavity, crisscrossing and extending into the nasal cavity. The eyebrow trimmer's blade cover cannot effectively allow nose hairs to enter this area. Therefore, the nose hair trimmer's blade cover needs a specific design, as shown in the technical solution described in application number CN200620131104.7, entitled "Nose Hair Trimmer". The nasal hair removal device typically consists of a small-radius, mesh-like blade that extends into the nasal cavity, also called a blade cover. Its top surface is formed by multiple bending units, which together create a nasal hair intake. Adjacent bending units form a slit-like slot that communicates with the intake. A movable, rotating blade is positioned inside each bending unit, cutting along the inner side wall of the blade cover. Because the slit-like slot is narrow, and to prevent meat from being squeezed in, the slot width cannot be too large. Therefore, the nasal hair enters primarily through the central nasal hair intake and then enters different slots for cutting. When inserted into the nostril, nasal hairs opposite the intake are more easily cut, while those extending laterally from the nostril's side into the intake are difficult to cut inside the blade cover, resulting in poor hair intake efficiency. Furthermore, the moving blade component of the nose hair trimmer usually adopts a similar structure as described in application number CN201821817498, which has a complex structure and assembly process and high manufacturing cost.

[0006] Because nasal hair trimmers only have a side cutting area and no cutting on the top surface, and have a large through-hole (nasal hair inlet), they are usually only used for shaving body hair in internal cavity areas such as the nasal cavity, in terms of both safety and cutting performance.

[0007] For engraving words and patterns on the head, a hair clipper is usually used. The biggest difference between a hair clipper and a regular hair scissors is the smaller blade width, allowing for smaller-area cutting and engraving. For example, the technical solution shown in application number CN201320724635.7, entitled "A Hair Clipper Engraving Blade Head," has a simple structure. However, because it cuts by oscillation, the cutting width is limited, unlike rotary nose hair trimmers or eyebrow trimmers. This restricts the lines of the engraved words or patterns, making it less suitable for most users. Furthermore, using a hair clipper requires pushing forward to shave, which is inconvenient for self-engraving and usually requires someone else to shave the hair.

[0008] As a result of the above, when consumers have shaving needs in multiple areas such as nose hair, eyebrows, and lettering, they need to buy different types of shaving tools. One type is expensive, and another type takes up a lot of living space and is not convenient. Moreover, although the concepts of various shaving tools are novel, their actual use is not good due to various defects, resulting in a poor social response and limited market promotion.

[0009] Our research focuses on a new design that can simultaneously meet the needs of nose hair, eyebrows, and head engraving, while also addressing the shortcomings of the aforementioned shaving tools—a multifunctional, small, rotating shaving assembly. [Summary of the invention]

[0010] The technical problem to be solved by the present invention is to provide a multifunctional small rotary shaving component, which has the characteristics of simple structure, good hair entry effect, high shaving efficiency, and safe shaving, and can also be applied to eyebrow trimming, nose hair trimming, head engraving, etc.

[0011] The present invention is achieved through the following technical solutions:

[0012] A multifunctional small rotary shaving assembly includes a shaving head cover and a moving blade assembly. The moving blade assembly includes a moving blade and a bracket for holding the moving blade. The shaving head cover includes an integrally formed head and body. The head includes a top and a wall connected to the outside of the top. The top and wall form a cutting cavity for the moving blade to rotate inside. The head has multiple hair inlet grooves along the circumferential direction, connecting the inside and outside of the head. The hair inlet grooves extend from the top to the wall and simultaneously penetrate the top and the wall. The turning point between the top and the wall has a flared hair guide port corresponding to the hair inlet grooves and used to guide hair into the grooves.

[0013] As described above, a multifunctional small rotary shaving assembly includes a moving blade body. A side blade is provided on the side of the moving blade body for laterally cutting hair in the hair inlet groove on the cover wall. An elastic arm is provided between the side blade and the moving blade body, fixing the side blade against the inner wall of the cover wall. The elastic arm and the side blade are located outside the support. An upward-facing top blade is provided on the moving blade body between the inner side of the side blade and the rotation center of the moving blade body. The top blade is separate from the side blade and the elastic arm, protruding above the support and used to cut hair in the hair inlet groove on the top of the cover.

[0014] As described above, in a multifunctional small rotary shaving assembly, the hair inlet groove forms a "7"-shaped structure through a top section on the top of the cover and a wall section on the wall of the cover. The horn-shaped hair guide opening is connected between the corresponding top section and wall section of the hair inlet groove. The side blade is located below the horn-shaped hair guide opening, and the top blade is located inside the horn-shaped hair guide opening. An avoidance opening is formed between the top blade and the side blade to avoid the horn-shaped hair guide opening.

[0015] As described above, in a multifunctional small rotary shaving assembly, the horn-shaped hair guide port is located outside the rotary cutting area S1 of the top blade, and the inner end of the hair inlet groove is located within the rotary cutting area S1 of the top blade; the horn-shaped hair guide port is located above the rotary cutting area S2 of the side blade, and the lower end of the hair inlet groove is located within the rotary cutting area S2 of the side blade.

[0016] As described above, in a multifunctional small rotary shaving assembly, the top blade, side blade, elastic arm, and moving blade body are integrally stamped, and the moving blade body and the bracket are integrally injection molded.

[0017] As described above, a multifunctional small rotary shaving assembly has two side blades, two flexible arms, and two top blades arranged around the rotation direction.

[0018] As described above, a multifunctional small rotary shaving assembly has a central positioning groove on the top of the bracket, which is coaxial with the rotation center of the bracket. The moving blade is provided with a slot corresponding to the central positioning groove so that the central positioning groove is exposed upwards. The center of the cover has a central positioning hole corresponding to the central positioning groove. The central positioning hole is isolated from the hair inlet groove. A positioning pin is fixed on the cover, which passes through the central positioning hole and is inserted into the central positioning groove. The positioning pin cooperates with the central positioning groove and restricts the lateral swing of the bracket, while allowing the bracket to rotate and float up and down relative to the positioning pin.

[0019] In the multifunctional small rotary shaving assembly described above, the positioning pin is located inside the area enclosed by the top section of a plurality of hair inlet grooves.

[0020] As described above, a multifunctional small rotary shaving assembly includes a moving blade body. The moving blade body has a side blade on its side for laterally cutting hair in the hair inlet groove on the cover wall. An elastic arm is provided between the side blade and the moving blade body to fix the two together and elastically press the side blade against the inner wall of the cover wall. The elastic arm and the side blade are located on the outside of the bracket.

[0021] As described above, a multifunctional small rotary shaving assembly has a conical casing, a side blade that is tilted at a certain angle relative to its rotation center so that its rotation path forms a conical region corresponding to the casing, and an elastic arm that is tilted and corresponds to the side blade.

[0022] As described above, in a multifunctional small rotary shaving assembly, the side blade has a side cutting edge, the side blade is inclined along the rotary cutting direction, and the angle α between the side cutting edge and the cover wall on the tangent is an acute angle.

[0023] As described above, a multifunctional small rotary shaving assembly includes a moving blade body with only an upward-facing top blade protruding above a support and used for rotary cutting of hair in the hair inlet groove on the top of the cover.

[0024] As described above, a multifunctional small rotary shaving assembly has a top cutting blade on the top blade, the top blade is inclined along the rotary cutting direction, and the angle b between the top cutting blade and the top cover is an acute angle.

[0025] As described above, a multifunctional small rotary shaving assembly has a bracket with multiple positioning posts along its circumference for rotating and positioning against the inner wall of the shaving head cover.

[0026] As described above, a multifunctional small rotary shaving assembly has a drive interface at the bottom of the bracket for connecting an external drive device, and a spring placement groove with an upwardly recessed design for placing a lifting spring on the inner side of the drive interface.

[0027] The multifunctional small rotary shaving assembly described above has a U-shaped elastic arm.

[0028] As described above, in a multifunctional small rotary shaving assembly, the horn-shaped hair guide opening is a V-shaped structure facing outwards and upwards, and forms a Y-shaped structure with the hair inlet groove located on the top of the cover and the hair inlet groove located on the wall of the cover, respectively.

[0029] As described above, in a multifunctional small rotary shaving assembly, the top cover is a flat-top structure or an outwardly convex spherical arc structure.

[0030] As described above, in a multifunctional small rotary shaving assembly, the hair inlet groove is opened radially along the shroud head.

[0031] As described above, in a multifunctional small rotary shaving assembly, multiple hair inlet grooves are evenly distributed along the circumferential direction on the head.

[0032] As described above, in a multifunctional small rotary shaving assembly, the shampoo head has a circular cross-section, and the shampoo wall has a cylindrical or conical structure.

[0033] As described above, in a multifunctional small rotary shaving assembly, when the cover wall is cylindrical, the outer diameter R1 of the cover head is less than 8 mm; when the cover wall is conical, the outer diameter R2 of the cover top is less than 6 mm, and the included angle D between the cover wall and the central axis is between 5° and 45°.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1. The small rotary shaving assembly of the present invention has a flared hair guide port at the turning connection between the top and the wall of the cover, which corresponds to the hair inlet groove and is used to guide hair into the hair inlet groove. Utilizing the width of two adjacent hair inlet grooves on the outer periphery of the top of the cover, while designing the hair inlet groove to have an appropriate width to ensure safety, the flared hair guide port can be set wider than the hair inlet groove. Since the flared hair guide port is located at the turning connection between the top and the wall of the cover, and the flared hair guide port is relatively large, it can guide hair into the hair inlet groove from the top, the side, or any inclined direction between the top and the side, resulting in high hair inlet efficiency, thereby improving the hair inlet groove's hair inlet efficiency. It can also be used simultaneously for eyebrow, nose hair, and shaved short hair, and combined with the moving blade assembly, it can achieve hair shaving in different body positions.

[0036] 2. The present invention has a top blade on the top of the moving blade body, and a side blade connected by an elastic arm. The top blade is separate from the side blade and the elastic arm. The elastic arm elastically presses the side blade against the inner wall of the cover, so that the small rotating shaving assembly has two cutting positions at the top and side. Based on the fact that the blade cover can well enter the hair from multiple positions such as eyebrows, nose hair and short hair, it integrates eyebrow trimming, nose hair trimming, head engraving and engraving, etc., to avoid buying different types of shaving tools in life, reduce living costs, save living space, and greatly facilitate people's lives.

[0037] 3. This invention separates the top blade and side blade, and uses an elastic arm to elastically press the side blade outward, thus compensating for wear and ensuring cutting sharpness. Wear compensation for the top blade is achieved by an external lifting spring that elastically presses the moving blade assembly upward. Therefore, the moving blade can be directly fixed to the bracket, simplifying the structure of the moving blade assembly. Furthermore, the top blade, side blade, elastic arm, and moving blade body are integrally stamped, and the moving blade body and bracket are integrally injection molded. The moving blade assembly consists of the moving blade and the bracket, resulting in fewer components, a simpler manufacturing process, and lower production costs. Furthermore, the assembly of the moving blade assembly and the blade head cover is simple and convenient, greatly improving production efficiency and reducing costs.

[0038] 4. This invention separates the top blade and side blade, thus avoiding the position of the flared hair guide opening. The flared hair guide opening is located outside the rotating cutting area S1 of the top blade, and above the rotating cutting area S2 of the side blade, protecting the skin. Furthermore, the inner end of the hair inlet groove is located within the rotating cutting area S1 of the top blade, meaning one section of the top blade is located inside the inner end of the hair inlet groove, protecting the top blade, while the other section is opposite the hair inlet groove to ensure effective cutting. The lower end of the hair inlet groove is located within the rotating cutting area S2 of the side blade, meaning one section of the side blade is located below the lower end of the hair inlet groove, protecting the side blade, while the other section is opposite the hair inlet groove to ensure effective cutting.

[0039] 5. In this invention, the cover wall is a conical structure. The side blades are tilted at a certain angle relative to their rotation center, and their rotation path forms a conical area corresponding to the cover wall. The elastic arm is tilted and corresponds to the side blades. The top of the conical cover head can be made smaller to allow for more precise trimming during shaving, and also to facilitate insertion into the nostril, allowing nasal hairs to enter from the conical slope and top surface. Moreover, when there are two or more side blades and elastic arms, the combination of the conical cover wall with the side blades and elastic arms allows the side blades to automatically compensate for wear and fit snugly against the cover wall, as well as automatically center.

Brief Description of the Drawings

[0040] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0041] Figure 1 This is a schematic diagram of one embodiment of the multifunctional small rotary shaving assembly of the present invention;

[0042] Figure 2 This is a side view of the tapered cutter head cover;

[0043] Figure 3 This is a top view of the tapered cutter head cover;

[0044] Figure 4 This is a schematic diagram of one embodiment of the moving blade assembly;

[0045] Figure 5 This is a schematic diagram of one embodiment of the moving blade;

[0046] Figure 6 This is the second schematic diagram of a structural embodiment of a cutting tool;

[0047] Figure 7 This is a bottom view of the tapered cutter head cover in conjunction with the moving cutter.

[0048] Figure 8 yes Figure 7 A cross-sectional view along the AA direction;

[0049] Figure 9 yes Figure 8 A cross-sectional view along the BB direction;

[0050] Figure 10 This is a bottom view of a multifunctional small rotary shaving assembly according to the present invention;

[0051] Figure 11 yes Figure 10 A cross-sectional view along the FF direction;

[0052] Figure 12 This is a schematic diagram of the structure of the second embodiment of the cutting tool;

[0053] Figure 13 This is a schematic diagram of the third embodiment of the cutting tool;

[0054] Figure 14 This is a side view of the cylindrical cutter head cover;

[0055] Figure 15 This is a schematic diagram of a multifunctional small rotary shaving assembly that uses a cylindrical blade cover.

[0056] Figure 16 This is a schematic diagram illustrating the machining principle of the burr inlet groove and the flared burr guide opening on the cutter head cover. [Specific implementation method]

[0057] The present invention will now be further described with reference to the accompanying drawings:

[0058] like Figures 1 to 15As shown, a multifunctional small rotary shaving assembly includes a shaving head cover 1 and a moving blade assembly 2. The moving blade assembly 2 includes a moving blade 3 and a bracket 4 for holding the moving blade 3. The shaving head cover 1 includes an integral cover head 11 and a cover body 12. The cover head 11 includes a cover top 111 and a cover wall 112 connected to the outside of the cover top 111. The cover top 111 and the cover wall 112 form a cutting cavity 110 for the moving blade 3 to rotate inside. The cover head 11 has multiple hair inlet grooves 13 connected to the inside and outside of the cover head 11 along the circumferential direction. The multiple hair inlet grooves 13 are independent of each other and not connected. The hair inlet grooves 13 extend from the cover top 111 across the cover wall 112 and simultaneously penetrate the cover top 111 longitudinally and the cover wall 112 laterally. The turning point between the cover top 111 and the cover wall 112 is provided with a flared hair guide port 14 corresponding to the hair inlet groove 13 and used to guide hair into the hair inlet groove 13. By utilizing the width of two adjacent hair inlet grooves 13 on the outer periphery of the top cover 111, while ensuring safety by designing the hair inlet grooves 13 with an appropriate width, the flared hair guide opening 14 can be set wider than the hair inlet grooves 13, for example, to more than 1.5 times or more than 2 times the width of the hair inlet grooves 13. Since the flared hair guide opening 14 is located at the turning connection between the top cover 111 and the cover wall 112, and the flared hair guide opening 14 is relatively large, it can guide hair into the hair inlet groove 13 from the top, from the side, or from any inclined direction between the top and the side, resulting in high hair inlet efficiency. This improves the hair inlet efficiency of the hair inlet groove 13, and it can also be used simultaneously for eyebrow, nose hair, and shaved short hair, achieving hair shaving in different body positions in combination with the moving blade assembly 2.

[0059] like Figures 4 to 11 As shown, in one embodiment of the moving blade 3, the moving blade 3 includes a moving blade body 31. The side of the moving blade body 31 is provided with a side blade 32 for laterally cutting the hair in the hair inlet groove 13 on the cover wall 112. An elastic arm 33 is provided between the side blade 32 and the moving blade body 31 to fix the side blade 32 to the inner wall of the cover wall 112. The elastic arm 33 and the side blade 32 are located outside the support 4. An upward-facing top blade 34 is provided on the moving blade body 31 between the inner side of the side blade 32 and the rotation center of the moving blade body 31. The top blade 34 is separated from the side blade 32 and the elastic arm 33. The top blade 34 is exposed above the support 4 and is used to cut the hair in the hair inlet groove 13 on the cover top 111. This small rotating shaving assembly has two cutting positions, one on the top and one on the side. It can achieve multi-position hair entry and integrates eyebrow trimming, nose hair trimming, and head engraving. It eliminates the need to buy different types of shaving tools, reduces living costs, saves living space, and greatly facilitates people's lives.

[0060] Furthermore, by separating the top blade 34 from the side blade 32 and elastically pressing the side blade 32 outwards via the elastic arm 33, wear compensation for the side blade 32 is achieved, ensuring cutting sharpness. Wear compensation for the top blade 34 is achieved by elastically pressing the moving blade assembly 2 upwards via an external lifting spring. Therefore, the moving blade 3 can be directly fixed to the bracket 4, simplifying the structure of the moving blade assembly 2. Preferably, the top blade 34, side blade 32, elastic arm 33, and moving blade body 31 are integrally stamped, and the moving blade body 31 and bracket 4 are integrally injection molded. The moving blade assembly 2 consists of the moving blade 3 and the bracket 4, resulting in fewer components, a simpler manufacturing process, and lower production costs. Moreover, the assembly and production of the moving blade assembly 2 and the blade cover 1 are simple and convenient, greatly improving production efficiency and reducing costs.

[0061] like Figure 5 As shown, in one embodiment of the elastic arm 33, the elastic arm 33 has a U-shaped structure to facilitate stamping.

[0062] The bottom of the bracket 4 is provided with a drive interface 43 for connecting an external drive device, and the inner side of the drive interface 43 is provided with a spring placement groove 44 that is recessed upward for placing the lifting spring.

[0063] like Figure 11 In the embodiment shown, the inlet groove 13 forms a "7"-shaped structure through a top section on the top of the cover and a wall section on the wall of the cover. The flared hair guide opening 14 is connected between the top section and the wall of the inlet groove 13. The side blade 32 is located below the flared hair guide opening 14, and the top blade 34 is located inside the flared hair guide opening 14. An avoidance opening 35 is formed between the top blade 34 and the side blade 32 to avoid cutting the skin squeezed in from the flared hair guide opening 14, thus ensuring good safety performance.

[0064] like Figure 7 and Figure 11 In the illustrated embodiment, the flared hair guide opening 14 is located outside the rotating cutting area S1 of the top blade 34 to protect the skin. The inner end 13a of the hair inlet groove 13 is located within the rotating cutting area S1 of the top blade 34. Thus, one section of the top blade 34 is located inside the inner end 13a of the hair inlet groove 13, which protects the top blade 34. The other section is opposite to the hair inlet groove 13 to ensure effective cutting. The flared hair guide opening 14 is located above the rotating cutting area S2 of the side blade 32 to protect the skin. The lower end 13b of the hair inlet groove 13 is located within the rotating cutting area S2 of the side blade 32. Thus, one section of the side blade 32 is located below the lower end 13b of the hair inlet groove 13, which protects the side blade 32. The other section is opposite to the hair inlet groove 13 to ensure effective cutting.

[0065] The side blade 32, elastic arm 33, and top blade 34 are arranged in twos around the rotation direction, which not only ensures the quantity and efficiency of cutting, but also allows them to be integrally formed by stamping.

[0066] The top of the bracket 4 is provided with a central positioning groove 41 coaxial with the rotation center of the bracket 4. The moving blade 3 is provided with a slot 36 corresponding to the position of the central positioning groove 41 so that the central positioning groove 41 is exposed upward. The center of the cover 111 is provided with a central positioning hole 15 corresponding to the central positioning groove 41. The central positioning hole 15 is isolated from the hair inlet groove 13. A positioning pin 5 is fixed on the cover 111, passing through the central positioning hole 15 and inserted into the central positioning groove 41. The positioning pin 5 cooperates with the central positioning groove 41 and restricts the lateral swing of the bracket 4. At the same time, it allows the bracket 4 to rotate and float up and down relative to the positioning pin 5. Through the cooperation of the positioning pin 5 and the central positioning groove 41, the moving blade assembly 2 can rotate more smoothly inside the blade cover 1.

[0067] like Figure 1 and Figure 15 In the embodiment shown, the positioning pin 5 is located inside the area enclosed by the top section of the multiple infeed grooves 13, to prevent the top cap of the positioning pin 5 from covering the infeed grooves 13 and affecting the infeed, and to avoid the pulling of the hair.

[0068] In order to better position the moving blade assembly 2 inside the blade head cover 1, the bracket 4 is provided with a plurality of positioning posts 42 along its circumference that can abut against the inner wall of the blade head cover 1 for rotational positioning.

[0069] To improve the precision of pruning, such as Figures 1 to 11 In the embodiment shown, the cover wall 112 is a conical structure, the side blade 32 is tilted at a certain angle relative to its rotation center and its rotation path forms a conical area corresponding to the cover wall 112, the elastic arm 33 is tilted and corresponds to the side blade 32, the top of the conical cover head 11 can be made relatively small, preferably, the outer diameter R2 of the cover top 111 is less than 6mm, preferably the outer diameter R2 < 4mm, and the included angle D between the cover wall 112 and the central axis is between 5° and 45°, preferably between 10° and 40°, of course, it can be further optimized to between 20° and 30° so that the trimming position is more accurate when shaving, and it is also convenient to insert into the nostril and allow the nose hair to enter from the conical inclined surface and the top surface.

[0070] In its natural state, the distance c between the side blade 32 and its rotation center is less than 5mm, preferably c<4mm. It is adjusted according to the inner diameter of the cover wall 112, and always ensures that there is pre-pressure between the side blade 32 and the cover wall 112 after the side blade 32 is installed in the cover wall 112.

[0071] Furthermore, when there are two or more side blades 32 and elastic arms 33, the combination of the tapered cover wall 112 with the side blades 32 and elastic arms 33 allows the side blades 32 to automatically compensate for wear and fit tightly against the cover wall 112, as well as automatically center.

[0072] Of course, if Figure 14 and Figure 15 As shown, in another embodiment of the blade cover 1, the cover 11 adopts a cylindrical structure, that is, the cover wall 112 is a cylindrical structure. The outer diameter R1 of the cover 11 is less than 8mm, preferably R1 < 6mm, and optimally R1 < 4mm, so as to accurately trim and shape, and insert into the nostril; in order to facilitate stamping and drafting, the cylindrical structure has a draft angle of 1° to 3°.

[0073] To improve the sharpness of side cuts, such as Figure 9 As shown, the side blade 32 is inclined along the rotational cutting direction, and the angle α between the side cutting edge 321 of the side blade 32 and the cover wall 112 on the tangent is an acute angle, with the angle α being between 20° and 80°, preferably between 40° and 60°.

[0074] To improve the sharpness of the top surface cut, such as Figure 8 As shown, the top blade 34 is inclined along the rotational cutting direction, and the angle b between the top cutting edge 341 of the top blade 34 and the top cover 111 is an acute angle, with the angle b between 20° and 80°, preferably between 40° and 60°.

[0075] like Figure 1 、 Figure 3 、 Figure 7 and Figure 15 In the illustrated embodiment, the horn-shaped guide opening 14 is an outwardly inclined V-shaped structure, forming a Y-shaped structure with the inlet groove 13 located on the top of the cover 111 and the inlet groove 13 located on the wall of the cover 112. This ensures that when the wool is fed from the top, the size decreases from the outside to the inside, while when the wool is fed from the side, the size decreases from top to bottom, thus ensuring good wool feeding effect on both the top and side surfaces. Moreover, it can be processed in one pass using a single grinding wheel, simplifying the manufacturing process.

[0076] Since the top cover 111 is relatively small, it adopts a flat top structure or an outwardly convex spherical arc structure, which is simple in structure and easy to manufacture.

[0077] The infeed groove 13 is opened radially along the cover head 11, and multiple infeed grooves 13 are evenly distributed on the cover head 11 in the circumferential direction. The structure is simple and easy to process.

[0078] like Figure 12As shown, as another embodiment of the moving blade 3, the moving blade 3 may only have side cutting. In this case, the moving blade 3 includes a moving blade body 31. The side of the moving blade body 31 is provided with a side blade 32 for side cutting the hair in the hair inlet groove 13 on the cover wall 112. An elastic arm 33 is provided between the side blade 32 and the moving blade body 31 to fix the two together and elastically press the side blade 32 against the inner wall of the cover wall 112. The elastic arm 33 and the side blade 32 are located on the outside of the bracket 4.

[0079] like Figure 13 As shown, as a third embodiment of the moving blade 3, the moving blade 3 may only have top surface cutting. In this case, the moving blade body 31 is provided with an upward-facing top blade 34 located between the inner side of the side blade 32 and the rotation center of the moving blade body 31. The top blade 34 is exposed above the support 4 and is used to cut the hair in the hair inlet groove 13 on the cover top 111.

[0080] like Figure 16 As shown, the processing principle of the burr inlet groove and the flared burr guide on a cutter head cover is as follows: After the cutter head cover body 10 with a lower opening is stamped out, a groove is cut between the top 111 and the wall 112 of the cover using a profile grinding wheel 6. The profile grinding wheel 6 includes an outer ring wheel 61 and an inner ring wheel 62 arranged coaxially. The inner ring wheel 62 is located inside the outer ring wheel 61, and the thickness of the inner ring wheel 62 is greater than the thickness of the outer ring wheel 61. A chamfer 63 is provided between the inner ring wheel 62 and the outer ring wheel 61 to facilitate a smooth transition between them. When cutting the burr inlet groove 13, the cutter head cover body 10 is positioned obliquely below the profile grinding wheel 6. The profile grinding wheel 6, which rotates relative to the cutter head cover body 10, is moved. During the feeding process, the burr is cut from the oblique top through the outer ring wheel 61. The process involves simultaneously cutting "7"-shaped feed grooves 13 on the top 111 and wall 112 of the cover. When the feed reaches the chamfer 63, a portion of the material on both sides of the feed groove 13 is removed at the junction between the top 111 and wall 112 via the chamfer 63, creating a flared guide opening 14. One feed groove 13 and its corresponding flared guide opening 14 are processed in one operation. The cutter head cover 10 is then withdrawn relative to the outer profile grinding wheel 6, rotated at an angle, and the cutting of the next feed groove 13 and flared guide opening 14 continues until all outer feed grooves 13 and outer flared guide openings 14 are completed. Finally, the outer surface edges of the feed grooves 13 and flared guide openings 14 are polished. This processing method is simple and highly efficient.

Claims

1. A multifunctional small rotary shaving assembly, characterized in that: The invention comprises a blade cover (1) and a movable blade assembly (2), wherein the movable blade assembly (2) comprises a movable blade (3) and a bracket (4) for holding the movable blade (3), wherein the blade cover (1) comprises a cover head (11) and a cover body (12) which are integrally formed from top to bottom, wherein the cover head (11) comprises a cover top (111) and a cover wall (112) connected to the outside of the cover top (111), wherein the cover top (111) and the cover wall (112) enclose a cutting chamber (110) for the movable blade (3) to rotate therein, and wherein a plurality of hair feed grooves (13) are provided on the cover head (11) along the circumferential direction and are connected to the inside and outside of the cover head (11), wherein the hair feed grooves (13) extend from the cover top (111) to the cover wall (112) and extend longitudinally. The cover top (111) is vertically penetrated and the cover wall (112) is horizontally penetrated. A horn hair guide opening (14) corresponding to the hair feed groove (13) and used for guiding hair into the hair feed groove (13) is provided at the turning point between the cover top (111) and the cover wall (112). The width of the horn hair guide opening (14) is greater than the width of the hair feed groove (13). The horn hair guide opening (14) is a V-shaped structure facing outward and obliquely upward, and forms a Y-shaped structure with the hair feed groove (13) located at the cover top (111) and the hair feed groove (13) located at the cover wall (112). The width of the horn hair guide opening (14) is greater than 1.5 times the width of the hair feed groove (13). The movable knife (3) includes a movable knife body The movable blade body (31) is provided with a side knife (32) on the side of the movable blade body (31) for cutting the hair in the hair feeding groove (13) on the cover wall (112) from the side, and a top knife (34) facing upward is provided on the movable blade body (31) between the inner side of the side knife (32) and the rotation center of the movable blade body (31), and the top knife (34) is exposed above the bracket (4) and is used for cutting the hair in the hair feeding groove (13) on the cover top (111), and the hair feeding groove (13) forms a "7"-shaped structure through the cover top section located on the cover top (111) and the cover wall section located on the cover wall (112), and the horn hair guide port (14) is connected to the hair feeding groove (13) located at the corresponding cover top. The side knife (32) is located between the cover wall section and the horn wall section, the side knife (32) is located below the speaker burr guide opening (14), the top knife (34) is located inside the speaker burr guide opening (14), an avoidance opening (35) for avoiding the speaker burr guide opening (14) is formed between the top knife (34) and the side knife (32), the speaker burr guide opening (14) is located outside the rotation cutting area S1 of the top knife (34), the inner end (13a) of the burr feed groove (13) is located in the rotation cutting area S1 of the top knife (34); the speaker burr guide opening (14) is located above the rotation cutting area S2 of the side knife (32), and the lower end (13b) of the burr feed groove (13) is located in the rotation cutting area S2 of the side knife (32).

2. A multifunctional small rotary shaving assembly according to claim 1, characterized in that: An elastic arm (33) is provided between the side knife (32) and the movable knife body (31) for fixedly connecting the two and elastically pressing the side knife (32) against the inner wall of the cover wall (112); the elastic arm (33) and the side knife (32) are located outside the bracket (4); the top knife (34) is separated from the side knife (32) and the elastic arm (33); and the top knife (34), the side knife (32), the elastic arm (33) and the movable knife body (31) are integrally stamped and formed.

3. A multifunctional small rotary shaving assembly according to claim 2, characterized in that: The movable blade body (31) and the bracket (4) are integrally injection molded.

4. A multifunctional small rotary shaving assembly according to claim 3, characterized in that: The side knife (32), the elastic arm (33) and the top knife (34) are respectively provided with two around the rotation direction.

5. A multifunctional small rotary shaving assembly according to claim 1, characterized in that: The cross section of the cover head (11) is circular, and the cover wall (112) is a cylindrical structure or a conical structure. When the cover wall (112) is a cylindrical structure, the outer diameter R1 of the cover head (11) is less than 8 mm; when the cover wall (112) is a conical structure, the outer diameter R2 of the cover top (111) is less than 6 mm, and the angle D between the cover wall (112) and the central axis is between 5° and 45°. The top of the bracket (4) is provided with a center positioning groove (41) coaxial with the rotation center of the bracket (4), and the movable knife (3) is provided with a center positioning groove (41) corresponding to the rotation center of the bracket (4). A slot (36) is arranged at the position of the groove (41) so that the central positioning groove (41) is exposed upwards; a central positioning hole (15) corresponding to the central positioning groove (41) is arranged at the center of the cover top (111); the central positioning hole (15) is isolated from the hair feeding groove (13); a positioning pin (5) is fixed on the cover top (111) and passes through the central positioning hole (15) and is inserted into the central positioning groove (41); the positioning pin (5) cooperates with the central positioning groove (41) and limits the lateral swing of the bracket (4), while allowing the bracket (4) to rotate relative to the positioning pin (5) and float up and down.

6. A multifunctional small rotary shaving assembly according to claim 5, characterized in that: The positioning pin (5) is located on the inner side of the area surrounded by the cover top sections of the plurality of hair inlet grooves (13).

7. A multifunctional small rotary shaving assembly according to any one of claims 2 to 6, characterized in that: The cover wall (112) is a conical structure, the side knife (32) is inclined at a certain angle relative to its rotation center so that its rotation path forms a conical area corresponding to the cover wall (112), and the elastic arm (33) is inclined and corresponds to the side knife (32).

8. A multifunctional small rotary shaving assembly according to claim 2, characterized in that: The side knife (32) has a side cutting edge (321), the side knife (32) is inclined along the rotational cutting direction, and the angle a between the side cutting edge (321) and the cover wall (112) on the tangent line is an acute angle.

9. A multifunctional small rotary shaving assembly according to claim 2, characterized in that: The top knife (34) is provided with a top cutting edge (341), the top knife (34) is inclined along the rotational cutting direction, and an angle b between the top cutting edge (341) and the cover top (111) is an acute angle.

10. A multifunctional small rotary shaving assembly according to claim 1, characterized in that: The bracket (4) is provided with a plurality of positioning posts (42) along its circumference for abutting against the inner wall of the cutter head cover (1) for rotational positioning.

11. A multifunctional small rotary shaving assembly according to claim 1, characterized in that: The bottom of the bracket (4) is provided with a driving interface (43) for connecting to an external driving device, and the inner side of the driving interface (43) is provided with a spring placement groove (44) which is concave upwards for placing a lifting spring.

12. A multifunctional small rotary shaving assembly according to claim 2, characterized in that: The elastic arm (33) is a U-shaped structure.

13. A multifunctional small rotary shaving assembly according to claim 1, characterized in that: The cover top (111) is a flat-top structure or an outwardly convex spherical arc structure.

14. A multifunctional small rotary shaving assembly according to claim 1, characterized in that: The hair inlet groove (13) is opened along the radial direction of the cover head (11).

15. The multifunctional small rotary shaving assembly according to claim 1, characterized in that: The plurality of hair feeding grooves (13) are evenly distributed along the circumferential direction on the cover head (11).

16. A multifunctional small rotary shaving assembly according to claim 1, characterized in that: The cross section of the cover head (11) is circular, and the cover wall (112) is a cylindrical structure or a conical structure.

17. A multifunctional small rotary shaving assembly according to claim 16, characterized in that: When the cover wall (112) is a cylindrical structure, the outer diameter R1 of the cover head (11) is less than 8 mm; when the cover wall (112) is a conical structure, the outer diameter R2 of the cover top (111) is less than 6 mm, and the angle D between the cover wall (112) and the central axis is between 5° and 45°.

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