Fixed blade for a hair cutting device and hair cutting device

Abstract

The application discloses a static blade of a hair cutter and the hair cutter. The static blade cooperates with a moving blade to cut hair. The static blade has at least one static blade cutting part. The static blade has a first surface facing the skin and a second surface opposite to the first surface. The static blade has a local concave area formed on the first surface or the second surface. The local concave area at least partially overlaps with the area where the static blade cutting part is located. The static blade provided with the local concave area can meet the functional requirement of cutting short hair, avoid the bending deformation caused by insufficient strength of the blade, avoid the wear between the moving blade and the static blade caused by micro deformation, effectively reduce the temperature rise, reduce the element design required for increasing the strength of the moving blade in the traditional blade assembly, reduce the assembly difficulty, avoid the time consumption of the multi-element mold design, and correspondingly reduce the raw material cost.

Description

Technical Field

[0001] This invention relates to a stationary blade and a hair cutter using such a stationary blade. Background Technology

[0002] Patent application number 201520235738.6 discloses a method for fixing a blade and a blade assembly, as detailed in the attached document. Figure 1 The fixed blade is configured to move in a moving direction through hair to cut it, including a first wall portion configured to face the skin wall during operation, a second wall portion offset from the first wall portion such that the first and second wall portions define a guide groove therebetween for receiving a movable cutting blade, at least one toothed leading edge formed by the first and second wall portions together, wherein the at least one toothed leading edge includes a plurality of teeth, wherein the first and second wall portions are connected at the frontal end of the at least one leading edge, thereby forming the tips of the teeth, wherein the fixed blade is an integrally formed metal-plastic composite fixed blade, wherein the first wall portion is at least partially made of metal material, and wherein the second wall portion is at least partially made of plastic material. In the above patent, in order to ensure the strength of the stationary blade, the second wall portion is provided to reinforce the strength of the first wall portion. The second wall portion used for reinforcement is also provided to be at least partially made of plastic material. Although this configuration can meet the strength required for a thinner stationary blade to a certain extent, the molding process and cost are relatively high. In addition to the above, existing blade assemblies, in order to cut shorter hairs for better cutting results, require a support structure (fixed blade holder) to increase the strength of the fixed blade and prevent the moving blade from shaking or skipping during use due to bending deformation of the fixed blade in the direction perpendicular to the moving blade's movement. Generally, another type of blade assembly uses a support structure to support the stationary blade. This support structure has a wall along the moving blade's movement direction, which supports the wall of the moving blade. While this design also strengthens the stationary blade to some extent, the increased support structure effectively increases the thickness of the entire stationary blade teeth. Therefore, this design is not suitable for cutting shorter hairs, or the cutting effect is unsatisfactory when cutting shorter hairs.

[0003] Because razors require extremely high precision in their cutting action, the fit between the various components of the razor blade assembly is also critical. Even a difference of a fraction of a millimeter in precision can result in hair not being cut, fuzzing, or blade skipping. Furthermore, adding each additional component increases the mold-making cost and manufacturing complexity several times over. Therefore, as the above description of existing technologies shows, current razor blade assemblies cannot simultaneously address the issues of razor strength, cutting effectiveness, and manufacturing process. Summary of the Invention

[0004] In view of this, the present invention provides a static blade for a hair cutter and a hair cutter.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A stationary blade of a hair cutter, which cooperates with a moving blade to cut hair in the direction of movement of the moving blade, the stationary blade having at least one stationary cutting section forming stationary blade teeth, a cutting groove being formed between two adjacent stationary blade teeth, the stationary blade having a first surface facing the skin, a second surface opposite to the first surface, and a partially concave region formed on the first or second surface, the partially concave region at least partially overlapping the region where the stationary blade cutting section is located.

[0007] Specifically, the stationary shearing section extends along the moving direction of the moving blade, and the locally recessed area covers the area where the stationary shearing section is located.

[0008] Specifically, the stationary blade includes a stationary blade body, the stationary blade body includes a flat portion and two beveled portions extending from both sides of the flat portion, the stationary blade shearing portion is formed on the flat portion or the beveled portion, or at the connection between the flat portion and the corresponding beveled portion, and the local concave region is formed in at least one of the flat portion or the beveled portion.

[0009] Specifically, the stationary blade includes a stationary blade body, which includes a flat portion and two beveled portions extending from both sides of the flat portion. An arc-shaped portion is formed between the flat portion and the beveled portions. The stationary blade shearing portion is formed on the flat portion, the beveled portion, or the arc-shaped portion, or at the connection between the arc-shaped portion and the corresponding flat portion or beveled portion. The local concave region is formed in at least one of the flat portion, the beveled portion, or the arc-shaped portion.

[0010] Specifically, the stationary blade includes a stationary blade body, which includes a first planar portion, two second planar portions extending from both sides of the first planar portion, and two curved portions extending from the second planar portions. The first planar portion and the corresponding second planar portion transition to form an arcuate portion. The stationary blade shearing portion is disposed in the first planar portion, the second planar portion, and the arcuate portion, and the local concave region is formed in at least one of the first planar portion, the second planar portion, or the arcuate portion.

[0011] Specifically, the stationary blade includes two connecting walls, which are arranged opposite to each other, and the two connecting walls are provided with a positioning structure for positioning the stationary blade.

[0012] Specifically, the stationary knife also includes a stationary knife fixing seat, which is provided with an auxiliary positioning structure that cooperates with the positioning structure. The positioning structure and the auxiliary positioning structure are positioned by means of a pin or a thin shaft.

[0013] Specifically, the stationary knife holder has two opposing stationary knife retaining walls, the stationary knife has two ends in the moving knife movement direction, and the stationary knife retaining walls are arranged together on the outer sides of the two ends.

[0014] Specifically, the stationary knife also includes a stationary knife fixing seat, which has two supporting walls. The stationary knife forms an insertion groove around the stationary knife. The stationary knife forms groove openings at both ends of the insertion groove along the moving knife's direction. The stationary knife fixing seat is inserted into the stationary knife through the groove openings of the insertion groove and cooperates with the stationary knife. The supporting walls support the portions of the stationary knife corresponding to the insertion grooves on both sides.

[0015] Specifically, the local concave area is located at the stationary blade teeth on both sides of the stationary blade.

[0016] The present invention also discloses a hair cutter, including the above-mentioned stationary blade and a movable blade that cooperates with the stationary blade. The movable blade is provided with a movable blade tooth portion that cooperates with the cutting part of the stationary blade, and the movable blade tooth portion forms movable blade teeth.

[0017] Specifically, the hair cutter also includes a moving blade holder, which is connected to the moving blade to drive the moving blade to reciprocate. An elastic element is provided between the moving blade holder and the stationary blade fixing seat. The elastic element has an elastic force perpendicular to the moving direction of the moving blade to push the moving blade toward the stationary blade.

[0018] Specifically, the hair cutter also includes a moving blade support and an elastic element. The moving blade support is connected to the moving blade, and the elastic element has an elastic force perpendicular to the moving direction of the moving blade. One end of the elastic element is limited by the stationary blade fixing seat, and the other end of the elastic element presses against the moving blade.

[0019] Specifically, the hair cutter further includes a moving blade support, an elastic element, and a fixing element support. The moving blade support is connected to the moving blade, and the fixing element support is connected to the stationary blade fixing seat. The elastic element has an elastic force perpendicular to the moving direction of the moving blade. One end of the elastic element is limited by the fixing element support, and the other end of the elastic element presses against the moving blade.

[0020] Specifically, the fixing bracket is provided with a connecting structure that connects to the stationary knife fixing seat, and the stationary knife fixing seat is provided with an auxiliary connecting structure that cooperates with the connecting structure. The connecting structure and the auxiliary connecting structure are connected by plugging or snapping.

[0021] Specifically, the hair cutter also includes a moving blade limiting member, which is fixed relative to the moving blade and has a guide structure to guide and limit the movement of the moving blade.

[0022] Specifically, the moving blade limiting member is connected to the elastic member or the stationary blade fixing seat.

[0023] The beneficial effects of the present invention are as follows: The stationary blade of the present invention has a locally recessed area, which can not only meet the functional needs of cutting short hair, but also avoid bending deformation caused by insufficient blade strength, avoid wear between the moving and stationary blades caused by micro-deformation, and effectively reduce temperature rise. This type of stationary blade reduces the design of components that need to increase the strength of the moving blade in the transmission blade assembly, reduces the difficulty of assembly, avoids the time spent on multi-component mold design, and correspondingly reduces the cost of raw materials. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Appendix Figure 1 The figure shown is an exploded view of a hair cutter in one embodiment of the present invention;

[0026] Appendix Figure 2 The attached image shows... Figure 1 Another exploded view from a different angle;

[0027] Appendix Figure 3 The diagram shown is an exploded view of the hair cutter in another variation of the present invention;

[0028] Appendix Figure 4 The attached image shows... Figure 2 Another exploded view from a different angle;

[0029] Appendix Figure 5 The diagram shown is an exploded view of the hair cutter in another variation of the present invention;

[0030] Appendix Figure 6 The diagram shown is an exploded view of the hair cutter in another variation of the present invention;

[0031] Appendix Figure 7 The diagram shown is an exploded view of the hair cutter in another variation of the present invention;

[0032] Appendix Figure 8 The diagram shown is an exploded view of the hair cutter in another variation of the present invention;

[0033] Appendix Figure 9 The diagram shown is an exploded view of the hair cutter in another variation of the present invention;

[0034] Appendix Figure 10 The diagram shown is an exploded view of the hair cutter in another variation of the present invention;

[0035] Appendix Figure 11 The diagram shown is an exploded view of the hair cutter in another variation of the present invention, which is approximately the same as the attached diagram. Figure 6 A schematic diagram of an embodiment;

[0036] Appendix Figure 12 For the appendix Figure 11 Enlarged view of point A.

[0037] Figure label:

[0038] 1. Stationary blade; 2. Moving blade; 3. Stationary blade shearing section; 4. Stationary blade teeth; 5. Shearing groove; 6. Moving blade teeth; 7. Moving blade teeth; 8. First surface; 9. Second surface; 10. Partially recessed area; 11. Stationary blade body; 12. Flat surface; 13. Beveled surface; 14. Arc-shaped surface; 15. First flat surface; 16. Second flat surface; 17. Curved surface; 18. Stationary blade fixing seat; 19. Connecting wall; 20. Positioning structure; 21. Auxiliary positioning structure; 22. Mating groove; 23. 24. Stationary knife retaining wall; 25. Seat body; 26. End; 27. Insertion groove; 28. Groove opening; 29. ​​Support wall; 30. Bottom surface; 31. Side surface; 32. Moving knife holder; 33. Elastic element; 34. Groove hole; 35. Support part; 36. Elastic preload part; 37. Arc section; 38. Moving knife bracket; 39. Fixing component bracket; 40. Connecting structure; 41. Auxiliary connecting structure; 42. Bracket wall; 43. Groove body; 44. Moving knife limiting element; 45. Guide structure; 46. Hair removal port. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The core of this invention lies in providing a stationary blade for a razor and a hair cutter using the stationary blade, so as to simultaneously solve the problems of razor strength, cutting effect and manufacturing process.

[0041] The present invention will now be further described with reference to the accompanying drawings.

[0042] This invention provides the following technical solution:

[0043] As attached Figures 1-12 As shown, this invention discloses a stationary blade for a hair cutter, and a hair cutter using the stationary blade. The hair cutter includes a stationary blade 1 and a movable blade 2 that cooperates with the stationary blade 1. The stationary blade 1 and the movable blade are configured to move relative to each other, typically cutting hair in the direction of movement of the movable blade 2. The stationary blade 1 has at least one stationary cutting portion 3, which forms stationary blade teeth 4, and a cutting groove 5 is formed between two adjacent stationary blade teeth 4. The movable blade 2 has a movable blade tooth portion 6 that cooperates with the stationary blade cutting portion 3, and the movable blade tooth portion 6 forms movable blade teeth 7. The stationary blade 1 has a first surface 8 facing the skin and a second surface 9 opposite to the first surface 8. The stationary blade 1 also has a partially recessed region 10, which is formed on either the first surface 8 or the second surface 9. When the hair cutter is in operation, its first surface 8 contacts the skin. The partially recessed region 10 at least partially overlaps with the area where the stationary blade cutting portion 3 is located.

[0044] With attachment Figure 1 , 2For example: The partially recessed area 10 is formed on the first surface 8. Specifically, the stationary blade 1 includes a stationary blade body 11, which includes a flat portion 12 and two beveled portions 13 extending from both sides of the flat portion 12. An arc-shaped portion 14 is formed between the flat portion 12 and the beveled portions 13. Preferably, the two beveled portions 13 are symmetrically arranged about the center line of the flat portion. The stationary blade 1 is provided with two stationary blade shearing portions 3, which are formed at the connection between the arc-shaped portion 14 and the corresponding flat portion 12 and beveled portion 13. The two stationary blade shearing portions 3 are arranged parallel to each other and both extend along the moving direction of the moving blade. The partially recessed area 10 extends along the stationary blade shearing portions 3. Preferably, the stationary blade 1 is formed in the form of a pre-fabricated sheet by bending or other means to form a stationary blade body 11 with a flat portion 12, beveled portion 13 and arc-shaped portion 14. The material of the stationary blade body 11 can be metal or other alloy materials with good welding performance. "The concave region 10 at least partially overlaps with the region where the static blade shearing section 3 is located." For details, refer to... Figure 1 , 2 As shown, the partially recessed region 10 is formed on the planar portion 12 of the stationary blade shearing section 3 and covers the planar portion 12 of the stationary blade shearing section 3 along its length. In the illustration, the partially recessed region 10 is provided on the planar portions 12 of both stationary blade shearing sections 3. In actual implementation, the partially recessed region 10 can be provided on only one of the planar portions 12, and the length of the partially recessed region 10 does not necessarily need to cover the length of the stationary blade shearing section 3. That is, the partially recessed region 10 of the stationary blade shearing section 3 can be provided on a certain segment along the length of the stationary blade shearing section 3.

[0045] It is understandable that, in order to maintain the strength of the stationary blade 1 while ensuring that the blade teeth are thin enough to cut shorter hairs, in specific implementations, depending on actual needs, the stationary blade cutting section 3 may also be formed on one of the planar section 12, the beveled section 13, or the curved section 14. Correspondingly, at least one of the planar section 12, the beveled section 13, or the curved section 14 may form the locally recessed region 10. For example... Figure 3 , 4 As shown is another embodiment of the present invention. Specifically, the arrangement of the stationary blade body 11 is the same as... Figure 1Similarly, the stationary blade shearing section 3 extends along the moving direction of the moving blade 2, but the difference lies in that the partially recessed area 10 covers all areas where the stationary blade shearing section 3 is located. This configuration creates a rectangular, opposing protrusion at the center of the blade body. The partially recessed area can be located at the stationary blade teeth 4 on both sides of the stationary blade 1. The stationary blade 1 of this invention, with the partially recessed area 10, satisfies the functional requirement of cutting short hairs while avoiding bending deformation caused by insufficient blade strength, preventing wear between the moving and stationary blades due to microscopic deformation, and effectively reducing temperature rise. This type of stationary blade 1 reduces the need for components that increase the strength of the moving blade in traditional blade assemblies, lowers assembly difficulty, avoids the time spent on multi-component mold design, and correspondingly reduces material costs.

[0046] like Figure 5 As shown, this is another embodiment of the present invention described above. Specifically, the arrangement of the stationary blade body 11 is the same as... Figure 1 , 3 Similarly, the stationary shearing section 3 extends along the moving direction of the moving blade 2, but the difference is that the stationary blade body 11 is provided with three stationary shearing sections 3, that is, relative to the attached blade 2. Figure 1 , 2 , attached Figure 5 The design also includes an independent stationary blade shearing section 3 formed on the planar portion. Correspondingly, the locally recessed region 10 covers the stationary blade shearing section 3 of the planar portion 12. Of course, the locally recessed region 10 of the planar portion 12 may only cover a portion of the stationary blade shearing section 3. The arrangement of three stationary blade shearing sections 3 and the corresponding locally recessed regions 10 for each stationary blade shearing section 3 is equivalent to forming a thickness reinforcement zone between each pair of stationary blade shearing sections 3. This arrangement can also increase the strength of the stationary blade 1. The thickness reinforcement zone can be two parallel reinforcement sections, or it can form a square, rectangle, or other frame shape depending on the position and shape of the locally recessed region 10, which will not be listed in this application.

[0047] Of course, the stationary blade body 11 may be configured to include only one flat portion 12 and two beveled portions 13 extending from both sides of the flat portion 12. The stationary blade shearing portion 3 is formed on the flat portion 12 or the beveled portion 13, or at the connection between the flat portion 12 and the corresponding beveled portion 13. Similarly, the local recessed area 10 is formed in at least one of the flat portion 12 or the beveled portion 13.

[0048] Specifically, such as Figure 11 , 12As shown, the stationary blade body 11 can also be configured to include a first planar portion 15, two second planar portions 16 extending from both sides of the first planar portion 15, and two curved portions 17 extending from the second planar portions 16. An arcuate portion 14 is formed between the first planar portion 15 and the corresponding second planar portion 16. The stationary blade shearing portion 3 is disposed on the first planar portion 15, the second planar portion 16, and the arcuate portion 14, or it can be disposed on the first planar portion 15, the second planar portion 16, the arcuate portion 14, and a portion of the curved portion 17. At least one of the first planar portion 15, the second planar portion 16, the arcuate portion 14, or the curved portion 17 forms the local concave region 10. With this configuration, the stationary blade body 11, through the curved portion 17, can have a pre-compression elastic force during assembly. This pre-compression elastic force has a component perpendicular to the moving direction of the moving blade 2, effectively preventing microscopic deformation of the stationary blade body 11. Because razors require extremely high precision when cutting, the fit between the various components is also very important. Even a difference of a fraction of a millimeter in the required precision can result in hair not being cut, pulling, or the razor skipping.

[0049] Further reference Figures 1-6 As shown, specifically, the stationary blade 1 further includes a stationary blade fixing seat 18, and the stationary blade body 11 further includes two connecting walls 19, which are arranged opposite to each other. Specifically, the two connecting walls 19 are formed by corresponding inclined surfaces 13 or curved surfaces 17 extending toward the stationary blade fixing seat 18, and the two connecting walls 19 are provided with positioning structures 20 for positioning the stationary blade 1. The stationary blade fixing seat 18 can be as follows: Figure 1 The overall form shown can also be as follows: Figure 5 The image shows the split configuration. The stationary knife holder 18 is equipped with an auxiliary positioning structure 21 that cooperates with the positioning structure 20. The positioning structure 20 and the auxiliary positioning structure 21 are positioned by means of snap-fit, riveting, insertion pins, or thin shafts.

[0050] by Figure 1 Taking the stationary knife 1 and the stationary knife fixing seat 18 as an example, the specific structural forms and connection methods between them will be described in detail: In this figure, the two connecting walls 19 are parallel to each other, and a mating groove 22 is formed between them to cooperate with the stationary knife fixing seat 18. The positioning structure 20 is a groove formed at both ends of the two connecting walls 19. The groove can be as shown in the attached figure. Figure 1 The closed-form groove shown can also be as attached. Figure 3The diagram shows a groove with an opening formed at the end of the connecting wall 19. It should be noted that the terms "closed" and "open" are relative and should not be used to infer or limit the form of the groove. Preferably, in the disclosed embodiment, the auxiliary positioning structure 21 is a mating groove 22 or mating hole formed in the stationary tool holder 18, corresponding to the position of the groove on the connecting wall 19, and the two are connected by the formation of a pin (shaft). The "pin" refers to a very thin shaft connecting the two in the actual implementation, which is limited by the limited installation space on the stationary tool and the stationary tool holder 18. With this configuration, when the stationary blade 1 and the stationary blade fixing seat 18 are assembled, the mating groove 22 between the two connecting walls 19 does not need to be temporarily expanded to accommodate the protruding structure on the stationary blade fixing seat 18. The stationary blade body is very thin, generally only a few micrometers. This expansion of the connecting wall 19 caused by temporary external force during installation will generally cause microscopic deformation of the stationary blade body. Since the hair cutter requires very high precision during cutting, the matching degree of each component in the hair cutter blade assembly is also very high. Even a difference of a few tenths of a micrometer in the required precision may result in the hair not being cut, or the hair being pulled or the blade jumping. This microscopic deformation will inevitably affect the mutual matching of the entire blade assembly, affect the cutting effect, and also cause the pulling phenomenon, thus affecting the cutting comfort. The embodiments disclosed in this invention can effectively avoid the above-mentioned defects.

[0051] Specifically, the stationary tool holder 18 has two opposing stationary tool retaining walls 23. It is easy to understand that when the stationary tool holder 18 is... Figures 1-4 In the overall form described, the stationary knife holder 18 has a base body 24 connecting two stationary knife holding walls 23. The stationary knife 1 has two ends 25 in the direction of movement of the moving knife 2, and the stationary knife holding walls 23 are provided corresponding to the two ends 25 of the stationary knife 1. (See attached...) Figures 1-5 In this configuration, the stationary knife retaining wall 23 is disposed on the outer sides of the two ends 25 in contact with each other. "In contact" means that the stationary knife retaining wall 23 is in contact with both ends of the stationary knife 1 to form a protective barrier for the stationary knife 1.

[0052] The stationary knife holder 18 can also be as follows: Figure 6-10 The structure shown specifically includes a stationary knife holder 18 with two support walls 28. Similarly, the stationary knife holder 18 can be a single unit or a modular unit, such as... Figure 6-10The stationary blade holder 18 shown is an integral unit, having a base body 24 connecting two support walls 28. The stationary blade body 11 forms an insertion groove 26 around its perimeter, with slots 27 at both ends of the stationary blade body 11 along the moving direction of the moving blade 1. The stationary blade holder 18 is inserted into the stationary blade 1 through the slots 27 of the insertion grooves 26, engaging with the stationary blade 1. The support walls 28 support the portions of the stationary blade 1 corresponding to the slots 26 on both sides; that is, the support walls 28 support the portions of the stationary blade 1 corresponding to the slots 27 of the insertion grooves 26. More specifically, at least a portion of the support wall 05 supports the first flat portion 15. The first flat portion 15 is attached to the... Figures 1-5 The planar portions are identical; both the first planar portion 15 and the planar portion 12 are configured as planes opposite to the stationary blade holder 18. When assembling the stationary blade body 11 and the stationary blade holder 18, the stationary blade holder 18 extends into the insertion groove 26 through the opening of the insertion groove 26 from one end where the support wall 28 is located. That is, during assembly, the support wall 28 faces the opening of the groove. Figure 6Taking the direction shown as an example, the cross-section of the support wall 28 along the moving direction of the moving blade 1 is the same as the cross-section of the slot. After assembly, the bottom surface 29 and the two side surfaces 30 of the support wall 28 all support the stationary blade body 11 at the slot position. That is, the bottom surface 29 of the support wall 28 supports the stationary blade body 11, and the two side surfaces 30, depending on the shape of the stationary blade body 11, at least support the inclined surface 13 of the stationary blade body 11. During the assembly of the stationary blade body 11 and the stationary blade fixing seat 18, the flat portion 12 of the stationary blade body 11 is prone to bending deformation as shown in the figure under the action of the inclined portion 13. During the assembly process of the support wall 28 with the stationary blade body 11, the support wall 28 contacts the stationary blade, and the support wall 28 and the seat body 24 of the stationary blade fixing seat 18 form an arch-like or "∩"-like structure. Under the constraint of this structure, the stationary blade fixing seat 18 is prone to bending deformation along the "∩". The deformation formed under this deformation force intersects with the deformation formed by the stationary blade body 11. In other words, the arrangement of the stationary blade fixing seat 18 suppresses and cancels the micro-deformation of the stationary blade body 11, and similarly, the stationary blade body 11 also suppresses and cancels the micro-deformation that the stationary blade fixing seat 18 is prone to produce. Therefore, this arrangement of the stationary blade 1 ensures high overall stability, better meeting the high-precision matching requirements of various components in the shaver during operation. It avoids wear between the moving and stationary blades caused by microscopic deformation, effectively reducing temperature rise. Simultaneously, maintaining the shape of the stationary blade 1 ensures that the shearing force generated between the stationary blade teeth 4 and the moving blade teeth 6 during cutting does not cause hair pulling, further improving user comfort. Since there are no other supporting elements between the stationary blade teeth 4 and the moving blade teeth 6, compared to the existing structural design with supporting elements between them, the overall thickness of the stationary blade teeth 4 is reduced, making it more suitable for cutting shorter hairs.

[0053] Specifically, the hair cutter also includes a movable blade holder 31, which is connected to the movable blade 2 and used to drive the movable blade 2 to reciprocate. The movable blade 2 and the movable blade holder 31 are set to be relatively fixed, and the two can be fixed together by means of snapping, gluing, welding, etc. Typically, the movable blade holder 31 is connected to a power source, and the power source has the force to drive the movable blade holder 31 to reciprocate.

[0054] For further details, please refer to the appendix. Figures 6-10 The support walls 28 of the stationary blade holder 18 are all perpendicular to the moving direction of the moving blade 2. In actual implementation, the support walls 28 can also be set to be inclined to the moving direction of the moving blade 2. The support walls 28, except for... Figure 6Besides the shape shown, it can also be further configured as a rectangle, triangle, arch, U-shape, or convex shape. The support wall 28 can simply be configured so that its bottom surface 29 supports the flat portion 12 at the slot, without the necessity for both sides 30 to support the stationary blade body 11 at the slot position. That is to say, the cross-sectional shape of the support wall 28 is not necessarily limited to being the same as or matching the slot. When the support wall 28 is configured as a rectangle, triangle, arch, U-shape, or convex shape, a hair removal opening 45 can be further formed at the support wall 28 and the slot, which makes it easier to clean out the hair that has entered the insertion slot 26.

[0055] like Figure 1 As shown, an elastic element 32 is provided between the moving blade holder 31 and the stationary blade fixing seat 18. The elastic element 32 is a spring 32 installed between the moving blade holder 31 and the stationary blade fixing seat 18. The elastic element 32 has an elastic force perpendicular to the moving blade's direction of movement, pushing the moving blade 2 towards the stationary blade 1. After this arrangement, the stationary blade teeth 4 and the moving blade teeth 6 are closely fitted together, enabling the cutting of shorter hairs and improving the overall stability of the blade assembly. Specifically, the stationary blade fixing seat 18 is provided with a slot 33, and the upper part of the moving blade holder 31 extends into the slot 33 to connect with the power source. The stationary blade fixing seat 18 has an attached... Figure 1 The center has a recessed area facing the stationary blade body 11. This design reduces the height of the stationary blade fixing seat 18, thereby reducing the overall assembly space of the hair trimmer. While improving the structural stability of the hair trimmer, the overall size design is more compact, making it easier to carry and store.

[0056] Specifically, such as Figure 6 As shown, the hair cutter can also be configured to include a moving blade support 37 and an elastic element 32. The moving blade support 37 is connected to the moving blade 2, and the elastic element 32 has an elastic force perpendicular to the moving direction of the moving blade 2. Figure 1 The difference lies in that one end of the elastic element 32 is limited by the stationary knife fixing seat 18, while the other end of the elastic element 32 presses against the moving knife 2. Specifically, the elastic element 32 has a support portion 34 and two elastic pre-compression portions 35 extending from both sides of the support portion 34, each elastic pre-compression portion 35 having an arc-shaped segment 36 that pre-compresses the moving knife 2. The support portion 34 is connected to the stationary knife fixing seat 18. Specifically, the stationary knife fixing seat 18 has a slot 33, and the support portion 34 extends into the slot 33 and interlocks with it, thereby forming a relatively fixed connection between the elastic element 32 and the stationary knife fixing seat 18.

[0057] Specifically, such as Figure 5As shown, the hair cutter can also be configured to include a moving blade support 37, an elastic element 32, and a fixing element support 38. The moving blade support 37 is connected to the moving blade 2, and the fixing element support 38 is connected to the stationary blade fixing seat 18. The elastic element 32 has an elastic force perpendicular to the moving direction of the moving blade 2. One end of the elastic element 32 is limited by the fixing element support 38, and the other end of the elastic element 32 presses against the moving blade 2. Specifically, the elastic element 32 and... Figure 6 The elastic element 32 is the same as that in the previous example. The fixing bracket 38 is provided with a connecting structure 39 that connects to the stationary knife fixing seat 18. The stationary knife fixing seat 18 is provided with an auxiliary connecting structure 40 that cooperates with the connecting structure 39. Specifically, the connecting structure 39 is a connecting groove provided at both ends of the fixing bracket 38, and the auxiliary connecting structure 40 is a protrusion provided in the stationary knife fixing seat 18. The two protrusions extend into the corresponding connecting grooves to fix the fixing bracket 38 and the stationary knife fixing seat 18 relative to each other. The connecting structure 39 and the auxiliary connecting structure 40 are connected by plugging or snapping. Similar connection methods that can be conceived by those skilled in the art will not be listed here. The moving knife bracket 37 has two bracket wall portions 41 that connect to the moving knife 2. Both the fixing bracket 38 and the elastic element 32 are provided with grooves 42 through which the bracket wall portions 41 pass. The grooves 42 can be set to extend along the moving direction of the moving knife 2. After this setting, the displacement of the moving knife bracket 37 can be further limited by the grooves 42.

[0058] Specifically, the hair cutter also includes a moving blade limiting member 43, which is fixed relative to the moving blade 2. The moving blade limiting member 43 can be connected to the elastic member 32 or the stationary blade fixing seat 18. The moving blade limiting member 43 is simply fixed relative to the elastic member 32 or the stationary blade fixing seat 18. Specifically, the connection between the moving blade limiting member 43 and the elastic member 32 or the stationary blade fixing seat 18 can be a fixed connection such as welding (spot welding or butt welding), secondary forming fixing, or a detachable connection such as a snap-fit. The moving blade limiting member 43 is provided with a guide structure 44 to guide and limit the movement of the moving blade 2.

[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stationary blade of a hair cutter, wherein the stationary blade cooperates with a moving blade to cut hair in the direction of movement of the moving blade, characterized in that: The stationary blade has at least one stationary blade shearing section, which forms stationary blade teeth. A shearing groove is formed between two adjacent stationary blade teeth. The stationary blade has a first surface facing the skin and a second surface opposite to the first surface. The stationary blade has a partially recessed area formed on the first or second surface. The partially recessed area at least partially overlaps with the area where the stationary blade shearing section is located. The stationary blade includes a stationary blade body and a stationary blade fixing seat. The stationary blade fixing seat has two support walls. The stationary blade body forms an insertion groove around the blade body. The stationary blade body forms slots for the insertion groove at both ends along the moving direction of the blade. The stationary blade fixing seat has a seat body connecting the two support walls. The support walls and the seat body of the stationary blade fixing seat form an arch or "∩" structure. The bottom surface of the support walls provides support for the stationary blade body at the slot position.

2. The stationary blade of the hair cutter according to claim 1, characterized in that: The stationary shearing section extends along the moving direction of the moving blade, and the locally recessed area covers the area where the stationary shearing section is located.

3. The stationary blade of the hair cutter according to claim 1, characterized in that: The stationary blade body includes a flat portion and two beveled portions extending from both sides of the flat portion. The stationary blade shearing portion is formed on the flat portion or the beveled portion, or at the connection between the flat portion and the corresponding beveled portion. The local recessed area is formed in at least one of the flat portion or the beveled portion.

4. The stationary blade of the hair cutter according to claim 1, characterized in that: The stationary blade body includes a flat portion and two beveled portions extending from both sides of the flat portion. An arc-shaped portion is formed between the flat portion and the beveled portions. The stationary blade shearing portion is formed on the flat portion, the beveled portion, or the arc-shaped portion, or at the connection between the arc-shaped portion and the corresponding flat portion or beveled portion. The local concave region is formed in at least one of the flat portion, the beveled portion, or the arc-shaped portion.

5. The stationary blade of the hair cutter according to claim 1, characterized in that: The stationary blade body includes a first planar portion, two second planar portions extending from both sides of the first planar portion, and two curved portions extending from the second planar portions. The first planar portion and the corresponding second planar portion transition to form an arcuate portion. The stationary blade shearing portion is disposed in the first planar portion, the second planar portion, and the arcuate portion, and the local concave region is formed in at least one of the first planar portion, the second planar portion, or the arcuate portion.

6. The stationary blade of the hair cutter according to any one of claims 1 to 5, characterized in that: The stationary blade includes two connecting walls, which are arranged opposite to each other, and the two connecting walls are provided with a positioning structure for positioning the stationary blade.

7. The stationary blade of the hair cutter according to claim 6, characterized in that: The stationary blade also includes a stationary blade fixing seat, which is provided with an auxiliary positioning structure that cooperates with the positioning structure. The positioning structure and the auxiliary positioning structure are positioned by inserting a thin shaft.

8. The stationary blade of the hair cutter according to claim 6, characterized in that: The stationary knife holder has two opposing stationary knife holding walls. The stationary knife has two ends in the moving knife movement direction, and the stationary knife holding walls are connected to each other on the outer sides of the two ends.

9. The stationary blade of the hair cutter according to any one of claims 1 to 5, characterized in that: The stationary knife also includes a stationary knife fixing seat, which has two support walls. The stationary knife forms an insertion groove around the stationary knife. The stationary knife forms groove openings at both ends of the insertion groove along the moving knife's direction. The stationary knife fixing seat is inserted into the stationary knife through the groove openings of the insertion groove and cooperates with the stationary knife. The support walls support the portions of the stationary knife corresponding to the insertion grooves on both sides.

10. The stationary blade of the hair cutter according to claim 1, characterized in that: The localized concave area is located at the stationary blade teeth on both sides of the stationary blade.

11. A hair cutter, characterized in that: It includes the stationary blade as described in claims 1 to 10 and the moving blade that cooperates with the stationary blade, wherein the moving blade is provided with a moving blade tooth portion that cooperates with the shearing portion of the stationary blade, and the moving blade tooth portion forms moving blade teeth.

12. The hair cutter according to claim 11, characterized in that: The hair cutter also includes a moving blade holder, which is connected to the moving blade to drive the moving blade to reciprocate. An elastic element is provided between the moving blade holder and the stationary blade fixing seat. The elastic element has an elastic force perpendicular to the moving blade's direction of movement to push the moving blade toward the stationary blade.

13. The hair cutter according to claim 11, characterized in that: The hair cutter also includes a moving blade support and an elastic element. The moving blade support is connected to the moving blade, and the elastic element has an elastic force perpendicular to the moving direction of the moving blade. One end of the elastic element is limited by the stationary blade fixing seat, and the other end of the elastic element presses against the moving blade.

14. The hair cutter according to claim 11, characterized in that: The hair cutter also includes a moving blade support, an elastic element, and a fixing element support. The moving blade support is connected to the moving blade, and the fixing element support is connected to the stationary blade fixing seat. The elastic element has an elastic force perpendicular to the moving direction of the moving blade. One end of the elastic element is limited by the fixing element support, and the other end of the elastic element presses against the moving blade.

15. The hair cutter according to claim 14, characterized in that: The fixing bracket is provided with a connecting structure that connects to the stationary knife fixing seat, and the stationary knife fixing seat is provided with an auxiliary connecting structure that cooperates with the connecting structure. The connecting structure and the auxiliary connecting structure are connected by plugging or snapping.

16. The hair cutter according to any one of claims 11 to 15, characterized in that: The hair cutter also includes a moving blade limiting member, which is fixed relative to the moving blade and has a guide structure to guide and limit the movement of the moving blade.

17. The hair cutter according to claim 16, characterized in that: The moving blade limiting component is connected to the elastic component or the stationary blade fixing seat.

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