Fixed blade of nose hair trimmer and its cutter head, and nose hair trimmer

Abstract

The nose hair trimmer's fixed blade (1) includes a fixed blade body (11) with cutting teeth (12) spaced apart along the circumferential direction. The cutting teeth surround a cutting chamber (13) within which the movable blade assembly moves. A nose hair entrance (14) is formed between the cutting teeth. The nose hair entrance includes a narrow hole (141) and a wide opening (142) wider than the narrow hole. A nose hair trimmer cutter head is also disclosed, which includes a housing (20) for mounting the fixed blade and a movable blade assembly. A top net (15) is provided on the top of the fixed blade, and a centering structure is provided between the top net and the movable blade assembly for centering the movable blade assembly as it rotates. The cutter head has a simple structure, a large nose hair capacity, good stability during rotation, reduced noise, clogging, and other problems, and improved cutting sharpness. A nose hair trimmer is also disclosed.

Description

[Technical Field]

[0001] The present invention relates to a fixed blade and a cutter head for a nose hair trimmer, and to a nose hair trimmer. [Background technology]

[0002] In a conventional nose hair trimmer, the nose hair trimmer head usually has one fixed blade and an inner blade assembly working together, the fixed blade covers the inner blade assembly inside, and the fixed blade has slits to allow nose hairs to enter and be cut.

[0003] For example, there is a built-in rotary nose hair trimmer disclosed in Publication No. CN202162825U. However, because nose hairs grow in various directions in the nostrils, when inserting a nose hair trimmer head into the nostrils to trim the nose hairs, it is difficult for the nose hairs to enter the slit and be cut. It often takes a long time to rotate the nose hair trimmer head multiple times before the nose hairs enter the slit and are cut. Furthermore, the fixed blade is usually tubular and has a certain taper, with a small upper portion and a large lower portion. When inserting the nose hair trimmer head into the nostrils, the large lower portion of the fixed blade is stopped at the entrance of the nostril, affecting the range of rotation of the nose hair trimmer head in the nostril and the ability of the nose hairs to enter the slit.

[0004] Furthermore, conventional movable blade assemblies include a movable blade holder, blades, and a spring. The spring elastically expands the blades and presses them against the inner wall of the fixed blade. The transmission structure of the movable blade holder is located at the lower end. When the lower end of the movable blade holder is connected to the transmission output shaft of the motor and rotates, the movable blade holder rotates eccentrically. However, the two upper blades are elastically supported on the sides of the fixed blade and are elastically expandable and contractible. As a result, when the entire movable blade assembly rotates at high speed, the upper part is prone to various movement situations such as protruding or swinging rotation. Furthermore, when the blades rotate in close contact with the inner wall of the fixed blade, they are unstable, and are prone to problems such as noise, clogging, and poor shearing sharpness.

[0005] The present invention has been made based on these circumstances. Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem to be solved by the present invention is to provide a fixed blade of a nose hair trimmer that has a simple structure and is capable of trapping a large amount of nose hair.

[0007] Another object of the present invention is to provide a cutter head in which the fixed blade is used, the movable blade assembly operates stably, noise, clogging is reduced, and sharpness during shearing is improved.

[0008] A third object of the present invention is to provide a nose hair trimmer that uses the cutter head, has a simple structure, and has good hair cutting performance.

[0009] In order to solve the above technical problems, the present invention provides the following technical means. [Means for solving the problem]

[0010] The fixed blade for a nose hair trimmer includes a fixed blade body, and cutting teeth are provided at intervals along the circumferential direction on the fixed blade body, the cutting teeth surround and form a cutting chamber in which the movable blade assembly moves, and a nose hair entrance is formed between the cutting teeth, and the nose hair entrance includes a narrow narrow hole located at the bottom and a wide opening located at the top that is wider than the narrow hole.

[0011] In the fixed blade of the nose hair trimmer as described above, the cutting teeth include long teeth and short teeth, a plurality of short teeth are provided between two adjacent long teeth, the heads of the short teeth are free ends, the nose hair entrance is formed between two adjacent long teeth, the short teeth form the narrow hole on both the left and right sides with the adjacent long tooth or the short tooth, and the two long teeth form a wide opening at the top of the short teeth.

[0012] In the fixed blade of the nose hair trimmer as described above, the long blade is characterized in that the upper end of the long blade is bent toward the center, thereby dividing the fixed blade into a side segment and a top segment.

[0013] In the fixed blade of the present invention, the fixed blade top segments are connected via a top net.

[0014] In the fixed blade of the present invention, the width of the short teeth is greater than the width of the long teeth.

[0015] In the fixed blade of the present invention, the fixed blade top segment is recessed downward relative to the fixed blade side segment.

[0016] In the fixed blade of the present invention, the short blade teeth are lower than the fixed blade side segments.

[0017] In the fixed blade of the present invention, the heads of the short cutting teeth face inward.

[0018] The fixed blade of the present invention is small in the upper and lower parts and large in the middle part.

[0019] In the fixed blade of the present invention, the central portion of the outer wall of the fixed blade body is a waist portion that is recessed inward.

[0020] In the fixed blade of the present invention, the cutting teeth are provided with sharp cutting edges.

[0021] The fixed blade of the present invention is formed by powder metallurgy.

[0022] The nose hair trimmer cutter head comprises any one of the fixed blades, a housing for mounting the fixed blade, and a movable blade assembly located within the fixed blade, wherein a top net is provided on the top of the fixed blade, and a centering structure is provided between the top net and the movable blade assembly for centering the movable blade assembly when it rotates.

[0023] In the nose hair trimmer cutter head as described above, the movable blade assembly includes a movable blade holder and a blade attached to the movable blade holder, the blade is in close contact with the inner wall of the fixed blade and cooperates with the cutting teeth to cut nose hairs that have entered the narrow hole when rotating, and the central positioning structure includes a central positioning hole and a positioning post that are arranged between the top net and the movable blade holder and cooperate with each other.

[0024] The cutter head of the nose hair trimmer as described above is characterized in that the positioning pillar is provided downward on the top net and the central positioning hole is provided on the movable blade holder, or the central positioning hole is provided on the top net and the positioning pillar is provided upward on the movable blade holder.

[0025] In the cutter head of the nose hair trimmer as described above, the middle and upper portions of the fixed blade are exposed above the housing, and the middle portion of the fixed blade is larger than the upper portion of the housing.

[0026] In the cutter head of the nose hair trimmer as described above, the lower end of the fixed blade is provided with an attachment part with a locking hole and a positioning groove, the upper end of the housing is provided with a slot for inserting the attachment part from top to bottom, and the slot is provided with a protruding locking part that locks into the locking hole and a positioning bar that is inserted into the positioning groove.

[0027] In the nose hair trimmer cutter head as described above, the fixed blade body has an outer wall with a central portion recessed inward, and the cutting chamber is a straight hole that penetrates downward, or a hole that is small at the top and large at the bottom. The fixed blade body has an attachment part at the bottom end, and the housing has an upper end with a slot for inserting the attachment part from top to bottom, and the attachment part is inserted into the slot and fixed.

[0028] In the nose hair trimmer cutter head as described above, the cutting teeth include long teeth and short teeth, a plurality of short teeth are provided between two adjacent long teeth, the upper ends of the long teeth are connected to a top net, and the heads of the short teeth are free ends, the nose hair entrance is formed between two adjacent long teeth, the short teeth form narrow holes on both the left and right sides with the adjacent long teeth or short teeth, and the two long teeth form wide openings at the top of the short teeth.

[0029] The nose hair trimmer is characterized in that it includes a cutter head of any one of the above nose hair trimmers and a main body provided with a movable blade assembly located within a fixed blade, and the movable blade assembly cooperates with the cutting tooth portion corresponding to the narrowed hole to cut the nose hair that has entered the narrowed hole. [Effects of the Invention]

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. In the present invention, the nose hair entrance is divided into two parts: a wide opening at the top and a narrow narrow hole at the bottom. The position of the narrow hole corresponds to the blade that rotates inside to cut the nose hair. The cooperation between the narrow hole and the blade improves the safety of cutting. The fixed blade rotates, swings, and / or moves in and out inside the nostril, but is not limited to these. The wide opening helps the nose hair to enter, and after the nose hair enters the wide opening, it is easier for it to enter the narrow hole from the wide opening, thereby improving the probability of it entering the cutting position and being cut.

[0032] 2. The combination of long and short blades ensures that the narrow hole has an appropriate width, and the wide mouth can be wider than the narrow hole. One wide mouth can simultaneously accommodate two or more narrow holes, increasing the amount of nose hair that can enter the narrow hole through the wide mouth, improving hair cutting efficiency.

[0033] 3. The fixed blade top segments are connected via a top net, which improves the structural strength of the long blades and makes the long blades thinner, helping to increase the amount of nose hair that can be removed. The width of the short blades is larger than that of the long blades, which improves the strength of the short blades.

[0034] 4. The top segment of the fixed blade is recessed downward relative to the side segments of the fixed blade, so that the long blade teeth are relatively higher at the connection points between the side segments of the fixed blade and the top segment of the fixed blade, which helps to guide nose hairs into the wide opening.

[0035] 5. The fixed blade has small upper and lower portions and a large middle portion, which allows the fixed blade to better stir at multiple angles inside the nostril after being inserted, helping to better insert and cut nose hairs into the narrowed nostril. Furthermore, the fixed blade has a waist portion that is recessed inward in the middle of its outer wall, which makes it easier to rotate the fixed blade. The increased outer diameter below the waist portion of the fixed blade helps to position the mounting portion on the outside, preventing the hole diameter at the position corresponding to the mounting portion in the inner chamber from becoming too small. Therefore, even if the outer diameter of the waist portion and the portion above the waist of the fixed blade remains unchanged, the hole diameter of the inner chamber will not be too small, which will prevent the movable blade assembly from being affected.

[0036] 6. Providing a sharp cutting edge on the cutting teeth improves the sharpness of cutting. The powder metallurgy molding process helps to form a sharp cutting edge. In addition, by providing the cutting chamber as a straight hole or a tapered hole with a smaller upper part and a larger lower part, the processing difficulty of powder metallurgy molding can be reduced.

[0037] 7. In the present invention, a positioning structure is provided between the top net and the movable blade assembly to center the movable blade assembly when it rotates, thereby improving the stability of the movable blade assembly when it rotates, reducing problems such as noise, clogging, and improving the cutting quality during shearing. [Brief explanation of the drawings]

[0038] [Figure 1]1 is a schematic diagram of a nose hair trimmer according to the present invention; [Figure 2] 1 is a schematic diagram illustrating a first embodiment of the present invention in which a fixed blade has long blade teeth and short blade teeth. [Figure 3] FIG. 10 is a schematic diagram of a second embodiment of the fixed blade of the present invention having long blade teeth and short blade teeth. [Figure 4] FIG. 10 is a schematic diagram illustrating an embodiment of the fixed blade of the present invention in which the upper ends of the long blade teeth are free ends. [Figure 5] FIG. 10 is a schematic diagram of an embodiment in which two short teeth are provided between two long teeth. [Figure 6] FIG. 10 is a schematic diagram of an embodiment in which a nose hair entrance is formed using only two incisors. [Figure 7] FIG. 10 is a schematic diagram of an embodiment in which a nose hair entrance is formed using only two incisors. [Figure 8] FIG. 10 is a schematic diagram illustrating a configuration in which the cutting edge of the fixed blade is acute-angled. [Figure 9] FIG. 9 is a schematic cross-sectional view taken along the line AA in FIG. 8. [Figure 10] 10 is a schematic diagram of the cooperation of the movable blade assembly and the fixed blade; [Figure 11] 1 is a schematic diagram of a cutter head in which a fixed blade having an inwardly recessed waist portion and a housing are assembled. FIG. [Figure 12] FIG. 12 is a schematic cross-sectional view taken along the line BB in FIG. 11. [Figure 13] FIG. 2 is a schematic diagram of an embodiment of a cutter head. [Figure 14] FIG. 2 is an exploded structural view of an embodiment of a cutter head. [Figure 15] FIG. 2 is a cross-sectional view of the centering structure of the cutter head of the present invention. [Figure 16] FIG. 10 is a cross-sectional view of another centering structure of the cutter head of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0039] The present invention will now be further described with reference to the drawings.

[0040] As shown in FIGS. 1 to 10 , the fixed blade 1 of the nose hair trimmer includes a fixed blade body 11, which has cutting teeth 12 spaced apart along its circumference. The cutting teeth 12 surround and define a cutting chamber 13 within which the movable blade assembly moves. A nose hair entrance 14 is formed between the cutting teeth 12. The nose hair entrance 14 includes a narrow constricted hole 141 located at a lower portion and a wide opening 142 located at an upper portion and wider than the constricted hole 141. The position of the constricted hole 141 corresponds to the blade that rotates therein to cut nose hairs. Cooperation between the constricted hole 141 and the blade improves cutting safety. The fixed blade 1 rotates, swings, and / or moves in and out of the nostril, but is not limited to this. The wide opening 142 helps nose hairs to enter, and after entering the wide opening 142, it is easier for the nose hair to enter the constricted hole 141 from the wide opening 142, thereby improving the probability of it entering the cutting position and being cut.

[0041] As shown in FIGS. 2 to 5, one embodiment of the incisor teeth 12 includes long teeth 121 and short teeth 122, and a plurality of short teeth 122 are provided between two adjacent long teeth 121. The heads of the short teeth 122 are free ends, and the nose hair entrance 14 is formed between two adjacent long teeth 121. The short teeth 122 form narrow holes 141 on both the left and right sides with the adjacent long teeth 121 or short teeth 122, and the two long teeth 121 form wide openings 142 at the top of the short teeth 122.

[0042] The combination of the long and short blade teeth ensures that the narrow hole 141 has an appropriate width, and the wide opening 142 can have a width larger than that of the narrow hole 141. One wide opening 142 can accommodate two or more narrow holes 141 at the same time, which increases the amount of nose hair that enters the narrow hole 141 from the wide opening 142, improving hair cutting efficiency.

[0043] 2 to 4, one short tooth 122 is provided between two adjacent long teeth 121, one wide opening 142 corresponds to two narrow holes 141 at the same time, and the width of the wide opening 142 is at least twice the width of the narrow holes 141. In the embodiment shown in FIG. 5, two short teeth 122 are provided between two adjacent long teeth 121, one wide opening 142 corresponds to three narrow holes 141 at the same time, and the wide opening 142 is larger than , and the width of the wide opening 142 is at least three times the width of the narrow holes 141.

[0044] The long blade 121 is divided into a fixed blade side segment 1211 and a fixed blade top segment 1212 by bending the upper end toward the center.

[0045] 2 and 3, the fixed blade top segments 1212 are connected via the top net 15, which improves the structural strength of the long teeth 121 and helps make the long teeth 121 thinner, thereby increasing the amount of nose hair that can be removed. The width of the short teeth 122 is greater than that of the long teeth 121, which improves the strength of the short teeth 122. Of course, as shown in FIG. 4, the long teeth 121 may have fixed lower ends and free upper ends, and multiple fixed blade top segments 1212 may surround a single notch at their tops, which communicates with the wide opening 142, making it easier to remove nose hairs.

[0046] As shown in Figures 2 to 4, the fixed blade top segment 1212 is recessed downward relative to the fixed blade side segment 1211, and the top net 15 is recessed downward from the top of the fixed blade 1, so that the long blade tooth 121 is relatively high at the point where the fixed blade side segment 1211 and the fixed blade top segment 1212 are turned and connected, which helps to guide nose hair into the wide opening 142.

[0047] As shown in Figures 2 to 4, the short blade teeth 122 are lower than the fixed blade side segments 1211, and the range of the wide opening 142 covers the upper part of the fixed blade side segments 1211, the turning connection point between the fixed blade side segments 1211 and the fixed blade top segment 1212, and the fixed blade top segment 1212, thereby helping to put nose hairs into the wide opening 142 when the fixed blade enters the nostril or when the fixed blade stirs into the nostril.

[0048] The fixed blade has small upper and lower portions and a large middle portion, which helps the fixed blade to better stir the nostrils at multiple angles after being inserted into the nostrils, and to better guide the nose hairs into the narrow hole 141 for cutting.

[0049] The heads of the short teeth 122 facing inward can better protect the movable blade assembly from the inside and can better prevent the ends of the short teeth 122 from hitting the inner wall of the nostril when inserted obliquely into the nostril.

[0050] In the embodiment shown in Fig. 3, the fixed blade side segment 1211 includes a straight segment 1201 and a deflecting segment 1202 deflecting inward relative to the straight segment 1201, and the short blade tooth 122 includes a corresponding straight segment 1201, and the straight segment 1201 of the short blade tooth 122 has an inwardly deflecting head at its upper end. Alternatively, in the embodiment shown in Fig. 2, the fixed blade side segment 1211 and the short blade tooth 122 are arc-shaped, and the upper end of the short blade tooth 122 deflects inward.

[0051] As a second embodiment of the incisor 12, as shown in Figures 6 and 7, the incisor 12 includes an upper thin segment 123, a lower thick segment 124, and an inclined segment 125 that slopes diagonally from the thin segment 123 to the thick segment 124. The two incisors 12 form a wide opening 142 between the thin segments 123 and a narrow hole 141 between the thick segments 124, resulting in a small number of teeth, a simple structure, and easy manufacturing. As shown in Figure 6, the narrow hole 141 may be located below the center of the wide opening 142, or of course, as shown in Figure 7, the narrow hole 141 may be located below one side of the wide opening 142.

[0052] As shown in FIG. 7, the cutting teeth 12 of the fixed blade 1 may be a combination of the first and second embodiments.

[0053] In one preferred embodiment of the present invention, as shown in Figures 8 and 9, the cutting teeth 12 are provided with sharp cutting edges 120, with an angle R of 85° or less, which helps to improve the sharpness during cutting. Furthermore, to facilitate the formation of the sharp cutting edges, the fixed blade 1 is preferably formed by powder metallurgy, and its cutting chamber 13 may be integrally formed by powder metallurgy, or may be formed by turning or milling after the fixed blade 1 is formed by powder metallurgy.

[0054] As shown in Figures 11 and 12, in order to enable the fixed blade 1 to better penetrate the nostril at multiple angles, the middle part of the outer wall of the fixed blade body 11 is a waist part 19 that is concave inward, and its inner chamber is a straight hole that penetrates downward, or a hole that is smaller at the top and larger at the bottom, which is convenient for injection molding, wheel forming, or milling in the powder metallurgy process. A mounting part 18 is provided at the lower end of the fixed blade body 11, and the outer diameter of the part below the waist part 19 is larger, which is convenient for the mounting part 18 to be provided on the outside, which prevents the hole diameter at the position of the inner chamber corresponding to the mounting part 18 from being too small. Therefore, even if the outer diameter of the waist part and above of the fixed blade remains unchanged, the hole diameter of the inner chamber will not be too small, which will affect the manufacturing and assembly of the movable blade assembly, for example.

[0055] As shown in Figures 1 to 16, the cutter head of the nose hair trimmer includes any one of the fixed blades 1 described above, a housing 20 for mounting the fixed blade 1, and a movable blade assembly located within the fixed blade 1, the fixed blade 1 including a fixed blade body 11, the fixed blade body 11 having cutting teeth 12 spaced apart along the circumferential direction, the cutting teeth 12 surrounding and forming a cutting chamber 13 within which the movable blade assembly moves, and a nose hair entrance 14 formed between the cutting teeth 12, the nose hair entrance 14 including a narrow narrow hole 141 located at the bottom and a wide opening 142 located at the top that is wider than the narrow hole 141. The position of the narrow hole 141 corresponds to the blade that rotates inside to cut the nose hair, and the cooperation between the narrow hole 141 and the blade improves the safety of cutting, and the fixed blade 1 rotates, swings and / or moves in and out inside the nostril, but is not limited to this, and the wide opening 142 helps the nose hair to enter, and after the nose hair enters the wide opening 142, it is easier for it to enter the narrow hole 141 from the wide opening 142, thereby improving the probability of it entering the cutting position and being cut.

[0056] 10, 14, and 15, one embodiment of the movable blade assembly includes a plastic holder or movable blade holder 3, a pair of blades 4 mounted on the plastic holder or movable blade holder 3, each pair having two blades, one on the left and one on the right, and an elastic structure between the blades 4 that presses each blade 4 sideways and elastically spreads the blades 4 to bring them into close contact with the inner walls of the cutting teeth 12, thereby improving the sharpness of shearing, and the elastic structure is preferably a spring 5. Preferably, the cutting edge of the blade 4 and the narrow hole 141 form an included angle of more than 10°, which not only improves shearing performance but also prevents the blade 4 from getting caught in the narrow hole 141 due to the action of the spring 5.

[0057] In order to restrict the movable blade assembly within the housing 20, a locking member 6 may be provided within the housing 20 as shown in FIG. 14, thereby restricting the movable blade holder 3 from falling out of the housing 20.

[0058] A top net 15 is provided at the top of the fixed blade 1, and a centering structure is provided between the top net 15 and the movable blade assembly to center the movable blade assembly when it rotates, thereby improving the stability of the movable blade assembly when it rotates, reducing problems such as noise, clogging, and improving the sharpness of the shearing.

[0059] In a preferred embodiment of the center positioning structure, the center positioning structure includes a central positioning hole 30 and a positioning post 10 that cooperate with each other and are provided between the top net 15 and the movable blade holder 3. Specifically, as shown in Figures 14 and 15, the top net 15 is provided with a downward-facing positioning post 10, and the movable blade holder 3 is provided with a central positioning hole 30, with the central positioning hole 30 and positioning post 10 hidden inside, resulting in a simple structure; alternatively, in an embodiment shown in Figure 16, the top net 15 is provided with a central positioning hole 30, and the movable blade holder 3 is provided with an upward-facing positioning post 10.

[0060] Preferably, the upper and lower portions of the fixed blade 1 are small and the middle portion is large, and preferably, as shown in Figures 13 to 16, the middle and upper portions of the fixed blade 1 are exposed above the housing 20, and the middle portion of the fixed blade 1 is larger than the upper portion of the housing 20, so that a narrow neck is formed below the front end of the cutter head of the nose hair trimmer, and when the front end of the cutter head of the nose hair trimmer with fixed blade is inserted into the nostril, the narrow neck is located at the entrance of the nostril, which helps the fixed blade to better stir at multiple angles inside the nostril after insertion and better insert the nose hair into the narrowed hole 141 to cut it.

[0061] In one embodiment of the fixed blade 1, the mounting portion 18 of the fixed blade 1 is provided with a locking hole 16 and a positioning groove 17, and the upper end of the housing 20 is provided with a slot 21 for inserting the mounting portion 18 from top to bottom, and the slot 21 is provided with a protruding locking portion 22 that locks into the locking hole 16 and a positioning bar 23 that is inserted into the positioning groove 17. As shown in Figures 11 and 12, the outer wall of the fixed blade 1 is preferably provided with a waist portion 19 that is recessed inward, and the waist portion 19 is located above the mounting portion 18, allowing the fixed blade 1 to easily rotate and operate within the nostril and helping to connect the fixed blade 1 to the housing 20 or main body 2, without affecting the movable blade assembly.

[0062] The nose hair trimmer shown in FIG. 1 includes a main body 2 provided with a fixed blade 1 of any one of the above-mentioned nose hair trimmers and a movable blade assembly located within the fixed blade 1, and the movable blade assembly cooperates with the portion of the cutting teeth 12 corresponding to the narrowed hole 141 to cut nose hairs that have entered the narrowed hole 141.

[0063] A power supply, a motor, and a motor output shaft are provided inside the main body 2, and the motor output shaft is connected to the plastic holder 3 and drives the plastic holder 3 to rotate the blade 4.

Claims

1. The blade includes a fixed blade body (11), and cutting teeth (12) are provided at intervals along the circumferential direction of the fixed blade body (11), and the cutting teeth (12) surround and form a cutting chamber (13) in which a movable blade assembly moves, and a nose hair entrance (14) is formed between the cutting teeth (12), and the nose hair entrance (14) includes a narrow narrow hole (141) located at a lower part and a wide opening (142) located at an upper part and wider than the narrow hole (141). Fixed blade of nose hair trimmer (1).

2. The cutting teeth (12) include long teeth (121) and short teeth (122), a plurality of short teeth (122) are provided between two adjacent long teeth (121), the heads of the short teeth (122) are free ends, the nose hair entrance (14) is formed between two adjacent long teeth (121), the short teeth (122) form the narrow hole (141) on both the left and right sides with the adjacent long teeth (121) or the short teeth (122), and the two long teeth (121) form a wide opening (142) at the top of the short teeth (122). The fixed blade (1) of a nose hair trimmer according to claim 1.

3. The long blade (121) is characterized in that its upper end is bent toward the center, thereby dividing it into a fixed blade side segment (1211) and a fixed blade top segment (1212). The fixed blade (1) of a nose hair trimmer according to claim 2.

4. The fixed blade top segments (1212) are connected via a top net (15), The fixed blade (1) of a nose hair trimmer according to claim 3.

5. The width of the short teeth (122) is greater than the width of the long teeth (121). The fixed blade (1) of a nose hair trimmer according to claim 4.

6. The fixed blade top segment (1212) is recessed downward relative to the fixed blade side segment (1211). The fixed blade (1) of a nose hair trimmer according to claim 3.

7. The short blade teeth (122) are lower than the fixed blade side segments (1211), The fixed blade (1) of a nose hair trimmer according to claim 3.

8. The heads of the short teeth (122) are directed inward. The fixed blade (1) of a nose hair trimmer according to claim 7.

9. It is characterized by small upper and lower parts and a large middle part. The fixed blade (1) of a nose hair trimmer according to claim 1.

10. The central part of the outer wall of the fixed blade body (11) is a waist part (19) that is recessed inward. The fixed blade (1) of a nose hair trimmer according to claim 1.

11. The cutting teeth (12) are provided with sharp cutting edges (120), The fixed blade (1) of a nose hair trimmer according to claim 1.

12. Characterized in that it is formed by powder metallurgy. The fixed blade (1) of a nose hair trimmer according to claim 10.

13. The present invention relates to a cutting tool including a fixed blade (1) according to claim 1, a housing (20) for mounting the fixed blade (1), and a movable blade assembly located within the fixed blade (1), characterized in that a top net (15) is provided on the top of the fixed blade (1), and a centering structure is provided between the top net (15) and the movable blade assembly for centering the movable blade assembly when it rotates. Nose hair trimmer cutter head.

14. The movable blade assembly includes a movable blade holder (3) and a blade (4) attached to the movable blade holder (3), the blade (4) is in close contact with the inner wall of the fixed blade (1) and cooperates with the cutting teeth (12) to cut nose hairs that have entered the narrow hole (141) when rotating, and the central positioning structure includes a central positioning hole (30) and a positioning post (10) that are provided between the top net (15) and the movable blade holder (3) and cooperate with each other. A cutter head for a nose hair trimmer according to claim 13.

15. The top net (15) is provided with the positioning posts (10) facing downward, and the movable blade holder (3) is provided with the central positioning hole (30), or the top net (15) is provided with the central positioning hole (30), and the movable blade holder (3) is provided with the positioning posts (10) facing upward. A cutter head for a nose hair trimmer according to claim 14.

16. The fixed blade (1) has a middle and an upper part exposed above the housing (20), and the middle part of the fixed blade (1) is larger than the upper part of the housing (20). A cutter head for a nose hair trimmer according to claim 13.

17. The fixed blade (1) is provided at its lower end with a mounting part (18) having a locking hole (16) and a positioning groove (17), and the housing (20) is provided at its upper end with a slot (21) for inserting the mounting part (18) from top to bottom, and the slot (21) is provided with a protruding locking part (22) that locks into the locking hole (16) and a positioning bar (23) that is inserted into the positioning groove (17). A cutter head for a nose hair trimmer according to claim 16.

18. The fixed blade body (11) has an outer wall with a central portion formed as a waist portion (19) recessed inward, and the cutting chamber (13) is a straight hole penetrating downward or a hole with a small upper portion and a large lower portion, and the fixed blade body (11) has an attachment portion (18) at its lower end, and the housing (20) has an upper end with a slot (21) for inserting the attachment portion (18) from top to bottom, and the attachment portion (18) is inserted into the slot (21) and fixed. A cutter head for a nose hair trimmer according to claim 13.

19. The cutting teeth (12) include long teeth (121) and short teeth (122), and a plurality of short teeth (122) are provided between two adjacent long teeth (121), the upper ends of the long teeth (121) are connected to the top net (15), and the heads of the short teeth (122) are free ends, the nose hair entrance (14) is formed between two adjacent long teeth (121), and the short teeth (122) form narrow holes (141) on both the left and right sides with the adjacent long teeth (121) or the short teeth (122), and the two long teeth (121) form wide openings (142) at the top of the short teeth (122). A cutter head for a nose hair trimmer according to claim 13.

20. The nose hair trimmer cutter head according to claim 13 is provided with a body (2) having a movable blade assembly located within a fixed blade (1), and the movable blade assembly cooperates with a portion of the cutting teeth (12) corresponding to the narrowed hole (141) to cut nose hairs that have entered the narrowed hole (141). Nose hair trimmer.

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