Debris ejection tool bit assembly

Abstract

This invention relates to a blade assembly with external debris discharge. The cutting section has several spaced-apart hair storage grooves. The sidewalls of adjacent hair storage grooves combine with the outer surface of the moving blade to form hollow or solid moving blade teeth. At least the upper end face and two side faces of the cutting section of the moving blade are in contact with the bottom end face and two side faces of the trimming section, respectively, so that the hair storage grooves and the inner wall of the trimming section enclose a space for placing debris. This space communicates with the outside via a hair inlet groove. The beneficial effect of this invention is that, due to the restriction of the contact between the two side faces of the cutting section and the two side faces of the trimming section, the debris placement space is physically isolated from the inside of the blade assembly, preventing debris from entering the blade assembly. After trimming hair such as beards, the user does not need to disassemble the blade assembly from the trimming tool body. Furthermore, the debris can only be discharged directly from the hair storage grooves through the hair inlet grooves to the outside of the stationary blade, ensuring the connection strength and assembly accuracy between the blade assembly and the trimming tool body, and guaranteeing the hair trimming performance of the blade assembly.

Description

Technical Field

[0001] This invention relates to a hair trimming device, and more specifically to a clipping head assembly, primarily used in the field of hair trimming tools such as razors or hair clippers. Background Technology

[0002] The existing blade assembly mainly consists of a stationary blade and a moving blade that oscillates back and forth along the stationary blade. When the hair to be trimmed, such as beard hair, enters the stationary blade and is cut by the moving blade, the hair clippings will fall directly into the blade assembly for temporary storage. The blade assembly will be rinsed and cleaned after the user finishes using it.

[0003] However, because the inside of the blade assembly is relatively enclosed, not all hair clippings can be removed even after rinsing. This causes hair clippings and other dirt to accumulate inside the blade assembly, which not only affects the operational stability of the moving blades inside the blade assembly and reduces the hair trimming performance of the blade assembly, but also allows bacteria to grow inside the blade assembly because the hair clippings cannot be cleaned in time, thus reducing the hygiene and safety of the blade assembly. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a blade assembly with external debris discharge capability. This blade assembly allows the debris cut by the passive blade to be discharged directly to the outside without entering the blade assembly, preventing the accumulation of debris inside the blade assembly from affecting its trimming performance, and avoiding bacterial growth inside the blade assembly, thereby improving the hygiene and safety of the blade assembly.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is a chip removal blade assembly, including a stationary blade and a moving blade placed below the stationary blade. The stationary blade has at least a trimming section, and the moving blade has at least a shearing section. The trimming section has several spaced-apart strip-shaped feed grooves that penetrate the stationary blade, with stationary blade teeth formed between adjacent feed grooves. The shearing section has several spaced-apart clipping grooves, with two adjacent sidewalls of adjacent clipping grooves combining with the outer surface of the moving blade to form hollow or solid moving blade teeth.

[0006] At least the upper end face and two sides of the shearing part of the moving blade are in contact with the bottom end face and two sides of the trimming part, respectively, keeping the upper end face of the moving blade tooth in contact with the bottom end face of the stationary blade tooth. The clipping groove and the inner wall of the trimming part enclose a space for placing debris. This space is connected to the outside through the clipping groove and is isolated from the inside of the blade head assembly by the restriction of the two sides of the shearing part being in contact with the two sides of the trimming part.

[0007] Preferably, when the upper end face of the moving cutter tooth is in contact with the bottom end face of the stationary cutter tooth, the bottom surface of the wool storage groove is flush with the bottom surfaces of both ends of the wool inlet groove and is connected to the outside through the wool inlet groove; or,

[0008] The bottom surface of the wool storage trough is higher than the bottom surfaces of both ends of the wool inlet trough, and it is connected to the outside through the wool inlet trough.

[0009] Preferably, when viewed from the orthographic projection direction of either end of the stationary or moving blade, the two sides of the shearing part and the two sides of the trimming part are in contact to form a fitting gap X, wherein the fitting gap X is: 0 ≤ X ≤ 0.05 mm.

[0010] Preferably, when viewed from the orthographic projection direction of either end of the stationary blade, the cross-section of the stationary blade is n-shaped, and the upper end of the n-shape is provided with several hair inlet grooves and the stationary blade teeth between adjacent hair inlet grooves constitute the trimming section;

[0011] The shearing part of the moving blade is a solid body whose cross-section is adapted to the cross-section of the trimming part, and solid moving blade teeth are formed between the hair storage groove and the adjacent hair storage groove;

[0012] When the upper end face of the moving cutter tooth is in contact with the bottom end face of the stationary cutter tooth under the action of external force, the depth L1 of the wool storage groove is less than the depth L2 of the wool inlet groove, so that the bottom surface of the wool storage groove is level with or higher than the bottom surfaces of the two ends of the wool inlet groove, and is connected to the outside through the wool inlet groove.

[0013] Preferably, when viewed from the orthographic projection direction of either end of the stationary blade, the stationary blade is in the shape of a hollow ring. The upper semicircle of the hollow ring forms the trimming part, and the hair inlet groove is arc-shaped, so that two hair inlet groove bottom surfaces are formed on the outer peripheral surface of the trimming part, and arc-shaped stationary blade teeth are formed between adjacent hair inlet grooves.

[0014] The moving blade is a cylinder, with at least the upper semicircle being a solid body forming the shearing part. The hair storage groove is set inside the shearing part. The two adjacent side walls of the adjacent hair storage grooves and the outer peripheral surface are combined to form solid moving blade teeth. The depth L1 of the hair storage groove is less than the radius of the semicircular shearing part to form the bottom surface of the hair storage groove.

[0015] Under the action of external force, the outer surface of the semi-circular shearing part and the inner surface of the semi-circular trimming part are in contact, so that the outer surface of the moving blade tooth and the inner surface of the stationary blade tooth are always in contact, and the bottom surface of the hair storage groove is level with or higher than the bottom surface of the two ends of the hair inlet groove, and is connected to the outside through the hair inlet groove.

[0016] Preferably, a guide rail is provided in the stationary tool and a guide groove is provided in the moving tool. The guide rail is placed in the guide groove so that the moving tool is radially limited relative to the stationary tool and can be axially displaced in the stationary tool.

[0017] Preferably, the moving cutter is provided with an elastic element that drives the outer surface of the moving cutter teeth to always maintain contact with the inner surface of the stationary cutter teeth.

[0018] Preferably, a ball bearing is provided between the outer surface of the moving blade and the inner surface of the stationary blade, and an elastic element is provided at the bottom of the ball bearing, with the elastic element placed inside the moving blade.

[0019] Preferably, the stationary blade comprises two separate, semi-circular arc-shaped blades that can be combined into a hollow ring. The trimming section includes an upper trimming section formed by the upper arc-shaped blade and a lower trimming section formed by the lower arc-shaped blade. At least one of the upper and lower trimming sections has a plurality of spaced-apart feed grooves that penetrate the upper and lower arc-shaped blades, and stationary blade teeth are formed between adjacent feed grooves.

[0020] The upper trimming part and the lower trimming part are connected as one unit by screws or snap-fit ​​structures; or, one side of the upper trimming part and the lower trimming part can be hinged and fixed to each other, while the other side is connected as one unit by screws or snap-fit ​​structures.

[0021] Preferably, the moving blade is a solid cylinder with several spaced-apart wool storage grooves on its relatively outer peripheral surfaces, and solid moving blade teeth are formed between adjacent wool storage grooves.

[0022] The cylindrical moving blade is placed between the upper trimming section and the lower trimming section. When the connection between the upper trimming section and the lower trimming section is adjusted by external force, the fitting clearance X between the outer circumferential surface of the moving blade and the upper trimming section and the lower trimming section can be increased or decreased, and the fitting clearance X is: 0 ≤ X ≤ 0.05mm.

[0023] The beneficial effect of this invention is that at least the upper end face and two sides of the cutting section of the moving blade are in contact with the bottom end face and two sides of the trimming section, respectively. This allows the bottom end face and two sides of the hair storage groove and the bottom end face and two sides of the trimming section to form a debris placement space based on the hair storage groove. Due to the restriction of the contact between the two sides of the cutting section and the two sides of the trimming section, the debris placement space is physically isolated from the inside of the blade assembly, preventing debris from entering the blade assembly. After trimming hair such as beards, the user does not need to disassemble the blade assembly from the trimming tool body, ensuring the connection strength and assembly accuracy between the blade assembly and the trimming tool body, and guaranteeing the hair trimming performance of the blade assembly. Simultaneously, due to the restriction of the contact between the two sides of the cutting section and the two sides of the trimming section, debris cannot enter the blade assembly, nor can it accumulate inside. The debris can only be discharged directly from the hair storage groove through the hair inlet groove, ensuring the stability of the moving blade operation while preventing bacterial growth and odor caused by debris accumulation inside the blade assembly, thus improving the hygiene and safety of the blade assembly. Attached Figure Description

[0024] Figure 1 A partial sectional view of a first embodiment of a chip removal tool assembly.

[0025] Figure 2 This is a plan view of the bottom surface of the wool storage tank and the bottom surfaces of the two ends of the wool inlet tank in the embodiment.

[0026] Figure 3 This is a cross-sectional view of the wool storage tank bottom surface being higher than the bottom surfaces of both ends of the wool inlet tank in the embodiment.

[0027] Figure 4 A three-dimensional structural diagram of the moving blade in the first embodiment of the chip removal tool assembly.

[0028] Figure 5 A partial sectional view of a second embodiment of a chip removal tool assembly.

[0029] Figure 6 Axial plan sectional view of a second embodiment of a chip-discharging cutter head assembly.

[0030] Figure 7 A radial plan sectional view of a second embodiment of a chip-discharging cutter head assembly.

[0031] Figure 8 A three-dimensional structural diagram of the moving blade in the second embodiment of the chip removal tool assembly.

[0032] Figure 9 A cross-sectional view of the assembly of the cutter head for external debris discharge, with the addition of an elastic element and balls.

[0033] Figure 10 A perspective view of the first embodiment of the third embodiment of the chip removal tool assembly.

[0034] Figure 11 Cross-sectional view of the first embodiment of the third embodiment of the chip removal cutter head assembly.

[0035] Figure 12 Exploded view of the first embodiment of the third embodiment of the chip removal tool assembly.

[0036] Figure 13 A perspective view of the second embodiment of the third embodiment of the chip removal tool assembly.

[0037] Figure 14 Cross-sectional view of the second embodiment of the third embodiment of the chip removal cutter head assembly.

[0038] Reference numerals: 1. Stationary blade; 11. Trimming section; 111. Panel; 112. Side plate; 113. Upper trimming section; 114. Lower trimming section; 12. Mounting section; 13. Infeed groove; 14. Stationary blade teeth; 15. Bottom surfaces of both end grooves; 16. Guide rail; 2. Moving blade; 21. Shearing section; 22. Drive section; 23. Wool storage groove; 24. Moving blade teeth; 25. Groove bottom surface; 26. Guide groove; 3. Elastic element; 31. Ball bearing; 32. Countersunk hole; 4. Screw; X. Fit clearance; L1. Wool storage groove depth; L2. Infeed groove depth; L3. Wool storage groove width; L4. Infeed groove width; L5. Moving blade tooth width; L6. Stationary blade tooth width. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-14Further explanation of the embodiments of the present invention:

[0040] This invention provides a blade assembly for externally discharging debris, wherein the debris refers to chopped beard hairs, fine hairs, or skin flakes detached from the skin surface. To achieve this external debris discharge, the blade assembly includes a stationary blade 1 and a moving blade 2 positioned below the stationary blade 1. The stationary blade 1 has at least a trimming section 11. For ease of assembly, a mounting section 12 may also be provided in the stationary blade 1 for assembly and fixation. To quickly guide the hair to be trimmed into the stationary blade 1, the trimming section 11 has several spaced-apart strip-shaped hair inlet grooves 13 that penetrate the stationary blade 1. Stationary blade teeth 14 are formed between adjacent hair inlet grooves 13. During use, the hair to be trimmed can be inserted into the stationary blade 1 through the hair inlet grooves 13, thus enabling hair introduction into the stationary blade 1.

[0041] In specific implementation, to improve the hair-feeding efficiency of the stationary blade 1, the hair-feeding groove 13 is strip-shaped. This strip can be S-shaped or rectangular. Regardless of whether it's S-shaped or rectangular, it significantly increases the cross-sectional area of ​​the hair-feeding groove 13, facilitating the insertion of curly hairs such as beard hairs into the stationary blade 1, thus improving the hair-feeding efficiency of the stationary blade 1. A curly shape refers to the curling of beard hairs or other hairs due to external factors such as skin oil or static electricity when they are relatively long (e.g., greater than 10mm). Correspondingly, the cross-sectional area of ​​curly hairs entering the stationary blade 1 inevitably increases. Therefore, the strip-shaped hair-feeding groove 13 is the preferred implementation.

[0042] To cut the hair, such as beard hair, that is inserted into the stationary blade 1, the moving blade 2 has at least a cutting section 21. The cutting section 21 has several spaced-apart hair storage grooves 23. The two adjacent sidewalls of adjacent hair storage grooves 23 combine with the outer surface of the moving blade 2 to form hollow or solid moving blade teeth 24. Whether hollow or solid, the moving blade teeth 24 are sufficient to cut the hair, such as beard hair, inserted into the hair storage grooves 13 of the stationary blade 1. In specific implementations, to achieve relative movement of the moving blade 2 along the stationary blade 1 (relative movement can be reciprocating linear motion, reciprocating rotary motion, or rotary motion) using the cooperation of the moving blade teeth 24 and the stationary blade teeth 14 to cut the hair, a driving section 22 can also be provided in the moving blade 2. The driving section 22 can be directly connected to the driving mechanism (not shown in the figure) or indirectly connected to the driving mechanism through a connecting component (not shown in the figure). Whether directly or indirectly connected, it is sufficient to ensure that the moving blade 2 can move relative to the stationary blade 1.

[0043] Because the existing cutter head assembly primarily uses an internal discharge method for the sheared hair clippings cut by the passive blades 24—meaning the clippings fall directly into the cutter head assembly—users must disassemble the assembly and rinse it or the machine body after use. This internal discharge method not only requires frequent disassembly of the cutter head assembly, affecting the connection and fit between the assembly and the trimmer body, but also, due to the relatively enclosed structure inside the assembly, not all clippings can be completely removed after rinsing. This leads to the accumulation of clippings and other dirt inside the assembly, affecting the operational stability of the moving blades 2 and reducing its hair trimming performance. Furthermore, the inability to promptly remove clippings can cause bacterial growth or unpleasant odors, reducing the hygiene and safety of the cutter head assembly.

[0044] Based on this, at least the upper end face and the two sides of the shearing part 21 of the moving blade 2 are in contact with the bottom end face and the two sides of the trimming part 11, respectively. When the upper end face of the shearing part 21 is in contact with the bottom end face of the trimming part 11, the upper end face of the moving blade tooth 24 and the bottom end face of the stationary blade tooth 14 always remain in contact to form a shearing force, ensuring the cutting sharpness of the blade assembly and improving the trimming performance of beards and other hairs.

[0045] When the two sides of the shearing section 21 contact the two sides of the trimming section 11, the bottom and two sides of the hair storage groove 23 and the bottom and two sides of the trimming section 11 can form a debris placement space based on the hair storage groove 23. Due to the restriction of the two sides of the shearing section 21 contacting the two sides of the trimming section 11, the debris placement space is physically isolated from the inside of the cutter head assembly, and the debris cannot enter the inside of the cutter head assembly. Secondly, the hollow or solid moving blade teeth 24 isolate adjacent hair storage grooves 23 so that they are not connected to each other, preventing the debris cut by the passive blade teeth 24 from moving around in adjacent hair storage grooves 23; and since the hair inlet groove 13 is connected to the outside, and the hair storage groove is connected to the hair inlet groove, when it is necessary to discharge the debris in the space, the user can invert or sideways the cutter head assembly or use water to rinse it, and the debris can be discharged from the space based on the hair storage groove 23 through the hair inlet groove 13 to the outside of the stationary blade 1, realizing the external discharge of debris from the cutter head assembly.

[0046] By employing an external debris discharge method, users do not need to disassemble the blade assembly from the trimmer body, ensuring the strong connection and assembly precision between the blade assembly and the trimmer body (not shown in the figure), and guaranteeing the hair trimming performance of the blade assembly. Simultaneously, with the cutting section 21 and trimming section 11 in contact on both sides, debris cannot enter or accumulate inside the blade assembly. This ensures the operational stability of the moving blade 2 and prevents bacterial growth and odor caused by debris accumulation inside the blade assembly, improving the hygiene and safety of the blade assembly.

[0047] When the upper surface of the moving blade 24 and the lower surface of the stationary blade 14 are in contact to cut the hair such as beard that has entered the hair inlet groove 13, in order to facilitate the convenient removal of debris and improve the efficiency of removal, the bottom surface 25 of the hair storage groove 23 is flush with the bottom surfaces 15 of the two ends of the hair inlet groove 13 and is connected to the outside through the hair inlet groove 13; with the bottom surface 25 of the hair storage groove 23 flush with the bottom surfaces 15 of the two ends of the hair inlet groove 13, the user only needs to invert, place on the side or rinse the blade assembly with water, and the debris cut by the passive blade 2 can smoothly slide out of the stationary blade 1 from the hair storage groove 23, improving the convenience and smoothness of debris removal. Of course, in specific embodiments, such as Figure 3 As shown, the bottom surface 25 of the wool storage trough 23 can also be set higher than the bottom surfaces 15 at both ends of the wool inlet trough 13, and connected to the outside through the wool inlet trough 13. When the bottom surface 25 of the wool storage trough 23 is higher than the bottom surfaces 15 at both ends of the wool inlet trough 13, the side walls at both ends of the wool inlet trough 13 will not form an obstruction, and the debris cut by the passive blade 2 can also be smoothly discharged from the wool storage trough 23 through the wool inlet trough 13 to the outside of the stationary blade 1. The specific structure adopted is not further limited in this embodiment.

[0048] The diameter of hairs such as beards growing on the surface of human skin varies depending on the location of growth, but its average diameter is between 0.05mm and 0.15mm. To prevent debris from entering the blade assembly, when viewed from the orthographic projection direction of either end of the stationary blade 1 or the moving blade 2, the two sides of the cutting part 21 and the two sides of the trimming part 11 are in contact to form a fitting gap X. The fitting gap X is: 0 ≤ Xmax ≤ 0.05mm, and the maximum fitting gap X is preferably 0.05mm. Setting the fitting gap X to 0.05mm makes the two sides of the cutting part 21 and the two sides of the trimming part 11 form a smooth surface fit. This not only reduces the frictional resistance when the moving blade 2 moves relative to the stationary blade 1, but also reduces the surface temperature rise of the moving blade 2 and the stationary blade 1, preventing the surface of the stationary blade 1 from getting hot due to friction and causing a burning sensation on the user's skin, thus improving the comfort of using the blade assembly. Simultaneously, it prevents debris from entering the cutter head assembly through the mating gap X, ensuring the operational stability of the moving cutter 2, and avoiding bacterial growth or odor caused by debris accumulation, thus improving the hygiene and safety of the cutter head assembly. Of course, if the processing equipment has higher precision, the mating gap Xmin can also be set to 0mm, but due to the limitations of processing equipment precision and production costs, setting the maximum mating gap X to 0.05mm is the optimal implementation method.

[0049] Based on the overall concept of debris removal described above, and to meet the assembly and usage requirements of trimming tools, this application proposes the following different embodiments according to the different shapes and structures of trimming tools:

[0050] Example 1

[0051] As shown in the figure, from stationary blades 1 to 4, viewed from the orthographic projection direction of either end, stationary blade 1 has an n-shaped cross-section, including a flat or arc-shaped panel 111. The panel 111 is attached to the skin and slides along the skin surface. A side plate 112 is provided on each side of the panel 111. During production, a cutting blade is used to cut downwards along the panel 111 to form a hair inlet groove 13. The hair inlet groove 13 penetrates at least partially through the two side plates 112, so that the bottom surfaces 15 of the two end grooves of the hair inlet groove 13 are formed in the two side plates 112 respectively. The upper end of the n-shape constitutes the trimming part 11, and the two side plates 112 at the lower end serve as mounting parts 12 for assembling and fixing the stationary blade 1 or the blade head assembly.

[0052] To improve the working strength of the moving blade teeth 24 in the shearing section 21, at least the shearing section 21 of the moving blade 2 is a solid body, and its cross-section is adapted to the cross-section of the trimming section 11. Solid moving blade teeth 24 are formed between the hair storage groove 23 and adjacent hair storage grooves 23. Although the cutting sharpness of hollow moving blade teeth 24 is not bad, they are prone to deformation under force. Therefore, using solid moving blade teeth 24 is a preferred embodiment. In specific implementation, the moving blade 2 is also provided with a driving section 22. The driving section 22 can be directly connected to the driving mechanism or indirectly connected to the driving mechanism through a connecting component (not shown in the figure). Furthermore, the driving section 22 can be a solid body to improve the working strength of the moving blade 2. However, a hollow body can also be used to reduce the material cost of the moving blade 2.

[0053] like Figures 2-3 As shown, to achieve debris discharge, when the upper end face of the moving cutter tooth 24 is driven by external force to fit against the bottom end face of the stationary cutter tooth 14, the depth L1 of the wool storage groove is less than the depth L2 of the wool inlet groove. This makes the bottom surface 25 of the wool storage groove 23 level with or higher than the bottom surfaces 15 at both ends of the wool inlet groove 13, and connects to the outside through the wool inlet groove 13. By making the depth L1 of the wool storage groove less than the depth L2 of the wool inlet groove, when the upper end face of the moving cutter tooth 24 is fitted against the bottom end face of the stationary cutter tooth 14, the bottom surface 25 of the wool storage groove 23 can be level with or higher than the bottom surfaces 15 at both ends of the wool inlet groove 13. Assuming the bottom surface 25 of the wool storage tank 23 is flush with the bottom surfaces 15 of both ends of the wool inlet tank 13, the user only needs to invert, place on the side, or rinse the blade assembly with water during or after use. The debris cut by the passive blade 2 can smoothly slide out of the stationary blade 1 from the wool storage tank 23, improving the convenience and smoothness of debris discharge. When the bottom surface 25 of the wool storage tank 23 is higher than the bottom surfaces 15 of both ends of the wool inlet tank 13, the side walls at both ends of the wool inlet tank 13 will not form an obstruction, and the debris cut by the passive blade 2 can also smoothly exit from the wool storage tank 23 through the wool inlet tank 13 and out of the stationary blade 1, improving the convenience and smoothness of debris discharge. This embodiment does not further limit which structure is adopted.

[0054] Example 2

[0055] like Figures 5-9 As shown, viewed from either end of the stationary blade 1 via orthographic projection, the stationary blade 1 is a hollow ring. The upper semicircle of the hollow ring constitutes the trimming part 11. During assembly, the lower semicircle can serve as the mounting part 12 to fix the stationary blade 1. During production, a cutting blade can be used to cut along the outer circumferential surface of the semicircular trimming part 11 to form a hair inlet groove 13. The corresponding cross-section of the hair inlet groove 13 is arc-shaped. When the trimming part 11 slides along the skin surface, the semicircular trimming part 11 moves more smoothly, resulting in a more comfortable skin feel for the user.

[0056] In practical implementation, considering the working strength of the stationary blade teeth 14 between adjacent hair inlet grooves 13, the cutting depth of the cutting blade along the outer peripheral surface of the trimming section 11 can be reduced, thereby reducing the arc length of the hair inlet groove 13 to be less than the arc length of the trimming section 11. This results in the formation of two end surfaces 15 of the hair inlet grooves 13 on the outer peripheral surface of the trimming section 11. When the arc length of the hair inlet groove 13 is relatively short, the working strength of the stationary blade teeth 14 between adjacent hair inlet grooves 13 is higher, minimizing the bending and deformation of the stationary blade teeth 14 due to skin pressure, and improving the working stability of the stationary blade 1.

[0057] Of course, to increase the cross-sectional area of ​​the hair inlet groove 13, the cutting depth of the cutting blade can be increased to increase the arc length of the hair inlet groove 13. Similarly, two hair inlet grooves 13g with end bottom surfaces 15 can be formed on the outer peripheral surface of the trimming part 11. When the arc length of the hair inlet groove 13 increases, the cross-sectional area of ​​the hair inlet groove 13 also increases accordingly, which is more conducive to the insertion of curly hairs such as beards into the stationary blade 1, thereby improving the hair inlet efficiency of the stationary blade 1.

[0058] like Figure 8 As shown, the moving blade 2 is a cylinder, with at least the upper semicircle being solid, forming the shearing section 21. A wool storage groove 23 is disposed within the shearing section 21. The two adjacent sidewalls and outer peripheral surfaces of adjacent wool storage grooves 23 combine to form solid moving blade teeth 24. Although hollow moving blade teeth 24 ensure cutting sharpness, they are prone to deformation under stress. Therefore, the moving blade 2 is designed as a cylinder, with the upper semicircle of the cylindrical moving blade 2 being solid. During production, the wool storage groove 23 is formed by cutting along the upper semicircle of the cylindrical moving blade 2, and solid moving blade teeth 24 are formed between adjacent wool storage grooves 23. This prevents the moving blade teeth 24 from deforming under stress, improving their working strength and cutting sharpness.

[0059] In some specific embodiments, the lower semicircle of the moving blade 2 is directly or indirectly connected to the driving mechanism (not shown in the figure) to form the driving part 22. Therefore, the upper semicircular shearing part 21 and the lower semicircular driving part 22 of the moving blade 2 can be an integral structure or a separate structure. The lower semicircle can be a solid body or a hollow body, as long as it ensures that the moving blade 2 can move relative to the stationary blade 1 under the drive of the driving mechanism (i.e., rotational motion, reciprocating rotational motion, or reciprocating linear motion). However, for cost considerations, in actual implementation, the driving part 22 of the lower semicircle of the moving blade 2 can be made into a hollow structure to reduce material costs. If for work strength considerations, the driving part 22 of the lower semicircle can be made into a solid structure.

[0060] The depth L1 of the wool storage groove is set to be less than the radius of the semi-circular shearing section 21 to form the bottom surface 25 of the wool storage groove 23. This relatively reduces the arc length of the moving blade 24. The shorter the arc length, the higher the bending strength of the moving blade 24, preventing deformation of the moving blade 24 and improving its working strength. Secondly, the depth L1 of the wool storage groove is mainly set with the bottom surfaces 15 at both ends of the wool inlet groove 13 as a reference. That is, the bottom surface 25 of the wool storage groove 23 is not lower than the bottom surfaces 15 at both ends of the wool inlet groove 13. To avoid the side walls of the trimming section 11 obstructing the discharge of debris in the wool storage groove 23, setting the depth L1 of the wool storage groove to be less than the radius of the semi-circular shearing section 21 is a preferred embodiment.

[0061] When the outer peripheral sidewalls on both sides of the shearing section 21 come into contact with the outer peripheral sidewalls on both sides of the semi-circular trimming section 11 in the stationary blade 1, the hair storage groove 23 forms a physical isolation with the inside of the blade assembly. The debris cut by the passive blade teeth 24 cannot enter the inside of the blade assembly, thus avoiding the impact of debris on the operational stability of the moving blade 2, as well as the growth of bacteria or the generation of odors inside the blade assembly, ensuring the working stability and hygienic safety of the blade assembly.

[0062] The bottom surface 25 of the wool storage trough 23 is level with or higher than the bottom surfaces 15 at both ends of the wool inlet trough 13, and is connected to the outside via the wool inlet trough 13. When the bottom surface 25 of the wool storage trough 23 is level with the bottom surfaces 15 at both ends of the wool inlet trough 13, the user only needs to invert, place on the side, or rinse the cutter head assembly with water during or after use. The debris cut by the passive blade 2 can smoothly slide out of the stationary blade 1 from the wool storage trough 23, improving the convenience and smoothness of debris discharge. When the bottom surface 25 of the wool storage trough 23 is higher than the bottom surfaces 15 at both ends of the wool inlet trough 13, the side walls at both ends of the wool inlet trough 13 will not form an obstruction, and the debris cut by the passive blade 2 can also smoothly flow out of the stationary blade 1 from the wool storage trough 23 via the wool inlet trough 13, improving the convenience and smoothness of debris discharge. This embodiment does not further limit which structure is adopted.

[0063] The shearing part 21 of the moving blade 2 comes into contact with the trimming part 11 of the stationary blade 1. This contact can be caused by an external force generated by a support spring installed between the moving blade 2 and the stationary blade 1, or by an external force generated by the drive mechanism supporting the moving blade 2 (not shown in the figure). The specific force can be set according to actual needs.

[0064] In some specific embodiments, such as Figure 7 As shown, to ensure the matching accuracy between the moving blade 24 and the stationary blade 14 and improve the hair trimming performance of the blade assembly, a guide rail 16 is provided in the stationary blade 1, and a guide groove 26 is provided in the moving blade 2. The guide rail 16 is placed in the guide groove 26 so that the moving blade 2 is radially limited and axially displaced relative to the stationary blade 1. By setting the guide rail 16 and the guide groove 26 in the stationary blade 1 and the moving blade 2 respectively, when the moving blade 2 moves relative to the stationary blade 1 under the drive of the drive mechanism, the mutual restraint of the guide rail 16 and the guide groove 26 prevents the misalignment or deflection of the moving blade 2 from affecting the matching accuracy between the moving blade 24 and the stationary blade 14, thus ensuring the cutting sharpness of the moving blade 24 and the stationary blade 14. Of course, to reduce the frictional resistance when the moving blade 2 moves relative to the stationary blade 1, such as Figure 7 As shown in the enlarged view, the guide groove 26 and the guide rail 16 do not directly contact each other. The ball bearings 31 or needle rollers set in the guide rail 16 or the guide groove 26 are used to reduce frictional resistance and improve the smoothness of the operation of the moving cutter 2.

[0065] like Figure 9 As shown, to improve the fit between the outer surface of the moving cutter tooth 24 and the inner surface of the stationary cutter tooth 14, and to increase the shearing force between the moving cutter tooth 24 and the stationary cutter tooth 14, an elastic element 3 is provided inside the moving cutter 2 to keep the outer surface of the moving cutter tooth 24 in contact with the inner surface of the stationary cutter tooth 14 at all times. To ensure that the shearing force formed between the two ends of the moving cutter 2 and the two ends of the stationary cutter 1 is consistent, elastic elements 3 are provided at both ends of the moving cutter 2 and the stationary cutter 1. If the stationary cutter 1 is n-shaped, two elastic elements 3 are provided at the bottom of the moving cutter 2, and these elastic elements 3 are springs. When the stationary cutter 1 is a hollow ring and the moving cutter 2 is cylindrical, the elastic elements 3 are springs and are provided on both sides below the moving cutter 2. The spring force is inclined towards the center of the cylindrical moving cutter 2, supporting the stationary cutter 1 and the moving cutter 2 respectively. To improve the smoothness of the movement of the moving blade 2 along the stationary blade 1, a ball bearing 31 is added to the end of the spring that contacts the stationary blade 1. The contact between the ball bearing 31 and the stationary blade 1 not only utilizes the spring force to ensure the engagement of the moving blade teeth 24 and the stationary blade teeth 14, increasing the shearing force, but also reduces the frictional resistance of the moving blade 2 as it moves along the stationary blade 1, thus improving the smoothness of its operation. In actual production, a countersunk hole 32 is provided inside the moving blade 2, and the spring and ball bearing 31 are placed within the countersunk hole 32. This ensures the reliability of the spring and ball bearing 31 and improves the working stability of the cutter head assembly.

[0066] Unlike the hollow annular stationary knife 1 with an integral structure described above, this application also proposes an embodiment of a split-structure stationary knife 1:

[0067] Example 3

[0068] like Figures 10-14 As shown, the stationary blade 1 includes two separate, semi-circular arc-shaped pieces that can be combined to form a hollow ring. The trimming part 11 includes an upper trimming part 113 composed of an upper arc-shaped piece and a lower trimming part 114 composed of a lower arc-shaped piece. At least one of the upper trimming part 113 and the lower trimming part 114 has a plurality of spaced-apart feed grooves 13 that penetrate the upper and lower arc-shaped pieces, and stationary blade teeth 14 are formed between adjacent feed grooves 13. Of course, in specific implementation, a plurality of spaced-apart feed grooves 13 that penetrate the arc-shaped pieces can be respectively provided in the upper trimming part 113 and / or the lower trimming part 114, so that stationary blade teeth 14 are formed between adjacent feed grooves 13. Making the stationary blade 1 separate not only facilitates the production of the stationary blade 1 and improves production efficiency, but also reduces the production precision of the stationary blade 1 or the moving blade 2. The gap between the moving blade 2 and the stationary blade 1 can be dynamically adjusted by using the tension of the arc-shaped pieces connecting the two separate pieces, resulting in higher production and assembly efficiency.

[0069] Since the stationary blade 1 is a separate unit, two assembly and fixing methods are proposed in this embodiment to facilitate its assembly and fixing. First, the upper trimming part 113 and the lower trimming part 114 are connected together at both ends using screws 4 or snap-fit ​​structures. Second, the upper trimming part 113 and the lower trimming part 114 are fixed by forming a hinge-like structure on one side. In this case, the upper trimming part 113 or the lower trimming part 114 can be rotated open or closed relative to the other, and then the other side is connected together using screws 4 or snap-fit ​​structures. Both assembly and fixing methods can achieve rapid installation of the separate stationary blade 1, improving assembly efficiency. The appropriate method can be chosen for specific implementation.

[0070] When the stationary knife 1 adopts the above-mentioned split structure, the moving knife 2 can adopt a corresponding split structure or an integral structure. Since the moving knife 2 adopts a split structure, an assembly process is added. Therefore, when the stationary knife 1 is split, the moving knife 2 is preferably an integral structure to reduce assembly processes and lower assembly costs.

[0071] When a hair inlet groove 13 is provided in the upper trimming part 113 of the split stationary blade 1, a number of spaced hair storage grooves 23 are provided at the corresponding positions of the moving blade 2, so that the moving blade teeth 24 formed between adjacent hair storage grooves 23 cooperate with the stationary blade teeth 14 to cut off the hair such as beards that extend into the hair inlet groove 13, thereby realizing the hair trimming performance of the blade assembly.

[0072] like Figure 12As shown, when the upper trimming part 113 and the lower trimming part 114 of the split stationary blade 1 are respectively provided with a number of spaced hair inlet grooves 13, hair storage grooves 23 can also be provided at the corresponding positions of the moving blade 2, and the moving blade teeth 24 formed between the adjacent hair storage grooves 23 can cooperate with the stationary blade teeth 14 in the upper trimming part 113 and the lower trimming part 114 to cut off the beard and other hair.

[0073] To ensure the shearing force generated by the engagement of the moving blade teeth 24 in the moving blade 2 and the stationary blade teeth 14 in the stationary blade 1, and to prevent debris from falling into the blade head assembly through the joint between the moving blade 2 and the stationary blade 1, thus affecting the operational stability of the moving blade 2 or causing bacterial growth and odor within the blade head assembly, the cylindrical moving blade 2 is positioned between the upper trimming section 113 and the lower trimming section 114. Screws 4 are added to one or both sides of the upper trimming section 113 and the lower trimming section 114. During assembly, the tightness of the screws 4 can be manually tightened to control the fit clearance X between the upper trimming section 113 or the lower trimming section 114 and the outer peripheral surface of the moving blade 2. The fit clearance X between the outer peripheral surface of the moving blade 2 and the upper trimming section 113 or the lower trimming section 114 can increase or decrease with changes in the tightness of the screws 4, achieving dynamic adjustment. Considering the average diameter of human hair such as beard hair, the fit clearance X is generally between 0 and Xmax. The thickness is ≤0.05mm, which prevents debris from entering the cutter head assembly. This ensures the stability of the moving cutter 2 while preventing bacteria or odor from growing inside the cutter head assembly due to debris, thus improving the user comfort and hygiene safety of the cutter head assembly.

[0074] In some specific embodiments, such as when the upper trimming part 113 and the lower trimming part 114 in the stationary blade 1 and the moving blade 2 have high machining accuracy, a smooth surface fit is formed. In this case, the fit clearance X between the outer peripheral surface of the moving blade 2 and the upper trimming part 113 and the lower trimming part 114 can be appropriately reduced, and the fit clearance X can be set to 0.02mm or 0.03mm, etc.

[0075] If the machining accuracy of the upper trimming part 113 and the lower trimming part 114 in the stationary cutter 1, as well as the moving cutter 2, is relatively low, the fitting clearance X between the moving cutter 2 and the upper trimming part 113 and the lower trimming part 114 can be appropriately increased, and the fitting clearance X can be set to 0.05mm or 0.04mm, etc.

[0076] Secondly, as the user's usage time increases, the wear on the outer peripheral surface of the moving blade 2 or the inner surfaces of the upper trimming part 113 and the lower trimming part 114 causes the mating clearance X to increase. The user can reduce the mating clearance X by adjusting the tightness of the screw 4, so that the blade assembly will not become unusable due to wear, thus reducing the user's usage and maintenance costs.

[0077] Because the blade assembly in this application adopts an external debris discharge method, the debris cut by the passive blade 2 cannot enter the blade assembly through the moving blade 2. To avoid the hair storage groove 23 being unable to support the trimming of beards and other hairs due to insufficient space, the width L3 of the hair storage groove in the moving blade 2 is greater than the width L4 of the hair inlet groove in the stationary blade 1. By increasing the width L3 of the hair storage groove in the moving blade 2, in actual use, the width L3 of the hair storage groove is greater than or equal to the width L4 of the hair inlet groove and the width L6 of an adjacent stationary blade tooth. When the moving blade 2 swings back and forth along the stationary blade 1 under the drive of the drive mechanism, the beards cut by the blades on both sides of the stationary blade tooth 14 and the moving blade tooth 24 fall into the two adjacent hair storage grooves 23. This can achieve the diversion and storage of debris, prevent the hair storage groove 23 from being insufficient in space, and prevent debris from adhering to the skin surface and causing user discomfort, thereby improving the user experience.

[0078] Secondly, to prevent the debris cut by the passive blade 2 from being discharged randomly, the width L5 of the moving blade tooth is smaller than the width L6 of the stationary blade tooth, so that the inner surface of the stationary blade tooth 14 forms a certain obstruction to the hair storage groove 23, minimizing the discharge of debris from the hair storage groove 23 without human control, preventing the debris from falling in a disorderly manner, and facilitating the user's collection and cleaning of the debris.

[0079] In the above embodiments, the solid moving blade 2 can be made of metal or plastic. If all metal is used, the material cost of the moving blade 2 will be relatively higher. For cost considerations, the moving blade 2 can be made of lower-cost plastic. A metal moving blade cover or a ceramic moving blade cover can be placed over the plastic moving blade teeth 24. This can still work with the stationary blade teeth 14 to cut hair such as beards, thus achieving the hair trimming performance of the blade assembly.

[0080] The above embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A chip removal cutter assembly, comprising a stationary cutter (1) and a moving cutter (2) positioned below the stationary cutter (1), characterized in that... The stationary blade (1) has at least a trimming section (11), and the moving blade (2) has at least a shearing section (21); the trimming section (11) has several spaced-apart strip-shaped feed grooves (13) that penetrate the stationary blade (1), and stationary blade teeth (14) are formed between adjacent feed grooves (13); the shearing section (21) has several spaced-apart storage grooves (23), and the two adjacent sidewalls of adjacent storage grooves (23) combine with the outer surface of the moving blade (2) to form hollow or solid moving blade teeth (24); wherein, At least the upper end face of the shearing part (21) and the two sides of the shearing part (21) in the moving blade (2) are in contact with the bottom end face of the trimming part (11) and the two sides of the trimming part (11), respectively, so that the upper end face of the moving blade tooth (24) and the bottom end face of the stationary blade tooth (14) are always in contact, and the hair storage groove (23) and the inner wall of the trimming part (11) are enclosed to form a space for placing debris. This space is connected to the outside through the hair inlet groove (13) and is isolated from the inside of the blade head assembly under the restriction that the two sides of the shearing part (21) are in contact with the two sides of the trimming part (11).

2. The chip removal tool assembly according to claim 1, characterized in that... When the upper end face of the moving cutter tooth (24) is in contact with the bottom end face of the stationary cutter tooth (14), the bottom surface (25) of the wool storage groove (23) is flush with the bottom surfaces (15) of both ends of the wool inlet groove (13) and is connected to the outside through the wool inlet groove (13); or, The bottom surface (25) of the wool storage trough (23) is higher than the bottom surfaces (15) of both ends of the wool inlet trough (13), and is connected to the outside through the wool inlet trough (13).

3. The chip removal tool assembly according to claim 1, characterized in that... Viewed from either end of the stationary blade (1) or the moving blade (2) via the orthographic projection direction, the two sides of the shearing part (21) and the two sides of the trimming part (11) are in contact to form a fitting gap X, wherein the fitting gap X is: 0 ≤ X ≤ 0.05 mm.

4. The chip removal tool assembly according to claim 1, characterized in that... Viewed from the orthographic projection direction of either end of the stationary blade (1), the cross section of the stationary blade (1) is n-shaped. The upper end of the n-shape is provided with several hair inlet grooves (13) and the stationary blade teeth (14) between adjacent hair inlet grooves (13) constitute the trimming part (11). The shearing part (21) in the moving blade (2) is a solid body and its cross section is adapted to the cross section of the trimming part (11). Solid moving blade teeth (24) are formed between the hair storage groove (23) and the adjacent hair storage groove (23). When the upper end face of the moving cutter tooth (24) is in contact with the bottom end face of the stationary cutter tooth (14) under the action of external force, the depth L1 of the wool storage groove is less than the depth L2 of the wool inlet groove, so that the bottom surface (25) of the wool storage groove (23) is level with or higher than the bottom surfaces (15) of the two ends of the wool inlet groove (13), and is connected to the outside through the wool inlet groove (13).

5. The chip-discharging cutter head assembly according to claim 1, characterized in that... Viewed from the orthographic projection direction of either end of the stationary blade (1), the stationary blade (1) is a hollow ring. The upper half of the hollow ring forms the trimming part (11), and the hair inlet groove (13) is arc-shaped, so that the bottom surfaces (15) of the two hair inlet grooves (13) are formed on the outer circumferential surface of the trimming part (11), and arc-shaped stationary blade teeth (14) are formed between adjacent hair inlet grooves (13). The moving blade (2) is a cylinder, with at least the upper half circle being a solid body forming the shearing part (21). The hair storage groove (23) is set inside the shearing part (21). The two adjacent side walls of the adjacent hair storage groove (23) and the outer peripheral surface are combined to form a solid moving blade tooth (24). The depth L1 of the hair storage groove is less than the radius of the semi-circular shearing part (21) to form the bottom surface (25) of the hair storage groove (23). Under the action of external force, the outer surface of the semi-circular shearing part (21) and the inner surface of the semi-circular trimming part (11) are in contact, so that the outer surface of the moving blade tooth (24) and the inner surface of the stationary blade tooth (14) are always in contact, and the bottom surface (25) of the hair storage groove (23) is level with or higher than the bottom surface (15) of the two ends of the hair inlet groove (13), and is connected to the outside through the hair inlet groove (13).

6. The chip removal tool assembly according to claim 1, characterized in that... A guide rail (16) is provided in the stationary cutter (1), and a guide groove (26) is provided in the moving cutter (2). The guide rail (16) is placed in the guide groove (26) so that the moving cutter (2) is radially limited relative to the stationary cutter (1) and can be axially displaced in the stationary cutter (1).

7. The chip removal tool assembly according to claim 1, characterized in that... An elastic element (3) is provided inside the moving cutter (2) to keep the outer surface of the moving cutter tooth (24) in contact with the inner surface of the stationary cutter tooth (14).

8. The chip removal tool assembly according to claim 1, characterized in that... A ball (31) is provided between the outer surface of the moving blade (2) and the inner surface of the stationary blade (1). An elastic element (3) is provided at the bottom of the ball (31) and is placed inside the moving blade (2).

9. The chip removal tool assembly according to claim 1, characterized in that... The stationary blade (1) comprises two separate, combinable, hollow ring-shaped semi-circular blades. The trimming section (11) comprises an upper trimming section (113) formed by the upper arc blade and a lower trimming section (114) formed by the lower arc blade. At least one of the upper trimming section (113) and the lower trimming section (114) is provided with a plurality of spaced-apart feed grooves (13) that penetrate the upper and lower arc blades. Stationary blade teeth (14) are formed between adjacent feed grooves (13). The upper trimming part (113) and the lower trimming part (114) are connected as one unit by screws (4) or snap-fit ​​structure respectively; or, one side of the upper trimming part (113) and the lower trimming part (114) can be hinged and fixed to each other by flipping, and the other side is connected as one unit by screws (4) or snap-fit ​​structure.

10. The chip-discharging cutter head assembly according to claim 8, characterized in that... The moving blade (2) is a solid cylinder and has several spaced wool storage grooves (23) on its relatively outer peripheral surface. Solid moving blade teeth (24) are formed between adjacent wool storage grooves (23). The cylindrical moving blade (2) is placed between the upper trimming part (113) and the lower trimming part (114). When the connection between the upper trimming part (113) and the lower trimming part (114) is adjusted by external force, the fitting clearance X between the outer peripheral surface of the moving blade (2) and the upper trimming part (113) and the lower trimming part (114) can be increased or decreased, and the fitting clearance X is: 0 ≤ X ≤ 0.05 mm.

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