Anti-jamming trimmer blade and head assembly

Abstract

The present application relates to the cutting blade and the cutter head assembly which prevent the tooth from being caught, characterized in that the length L1 of the tooth groove group is less than the length L2 of the face plate, the two ends of the face plate are formed with the reinforcing plates respectively, the tooth groove group comprises the trimming unit and the limiting unit arranged at the two ends of the trimming unit; wherein the two ends of each trimming groove in the trimming unit are through the face plate, each trimming groove in the limiting unit has at least one connecting rib which is coplanar with the inner surface of the face plate, and each trimming groove in the limiting unit is connected with the reinforcing plate through the connecting rib in sequence and is integrated. The beneficial effect of the present application is that at least one connecting rib which is coplanar with the inner surface of the face plate is arranged in each trimming groove in the limiting unit, when the moving blade reciprocates along the inner surface of the face plate and the plate warping phenomenon occurs, the two ends of the moving blade are always below the limiting unit, the moving blade teeth at the two ends are blocked by the connecting rib and cannot be caught in the trimming groove in the limiting unit, the continuity of the reciprocating movement of the moving blade and the trimming performance of the hair such as beard are ensured.

Description

Technical Field

[0001] This invention relates to a trimming blade for trimming hair such as beards, and more specifically to a trimming blade and blade head assembly that prevents the blade from getting stuck, mainly applicable to the field of personal care tools such as razors and hair trimmers. Background Technology

[0002] There are two main types of stationary blades in existing reciprocating hair trimming tools. One type is a flexible, thin blade that is curved into a U-shape. Several beard entry holes are located at the curve of the blade. Figure 1 As shown. Alternatively, please refer to Chinese Patent Application No. CN220051928U, filed by this applicant.

[0003] Secondly, rigid sheets are bent into an inverted U-shape, but can be further divided into two types based on the shape of the pores: the first type is as follows... Figures 2-4 As shown (or see Chinese Patent, Publication No.: CN115139344A): A stationary blade with an inverted U-shape has several spaced-apart trimming grooves A1, with trimming teeth A2 formed between adjacent trimming grooves A1. Connecting ribs A3 are provided in the middle of each trimming groove A1, dividing each groove A1 in two. While this type of stationary blade has high working strength, during actual trimming, the connecting ribs A3 not only hinder hair such as beards from entering the trimming grooves A1 from the front of the blade, especially long, curly beards, reducing the efficiency of hair entry, but also, due to the presence of the connecting ribs A3, it occupies the effective trimming area of ​​the blade, reducing the actual usable trimming area and lowering the efficiency of hair trimming.

[0004] The second type is as follows Figures 5-6 As shown (see also Chinese Patent, Publication No.: CN108406859A), a number of trimming teeth B1 are arranged at intervals in the stationary blade, and trimming grooves B2 are formed between adjacent trimming teeth B1. This structure facilitates the sliding of hair such as beards into and out of the stationary blade from the front or side, improving the efficiency of hair removal. Furthermore, the absence of connecting ribs between the trimming grooves does not occupy the effective trimming area of ​​the stationary blade, ensuring the trimming efficiency of hair such as beards.

[0005] However, some technical defects exist in actual use. For example, the moving blade is in contact with the inner wall of the stationary blade under the action of the elastic element. During the reciprocating trimming process along the stationary blade, the oscillation process does not always maintain a horizontal motion as designed. Affected by factors such as the obstruction of beard hair, a seesaw phenomenon will form at both ends of the moving blade. That is, one end of the moving blade will be obstructed by beard hair and will move downward, while the other end will be raised. At this time, the moving blade teeth of the raised end of the moving blade are very likely to get stuck in the trimming groove of the stationary blade during the reciprocating oscillation, resulting in tooth jamming, affecting the trimming performance of beard hair and even damaging the trimming tool. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a trimming blade and blade head assembly that prevents teeth from getting stuck. This trimming blade not only maximizes the surface utilization of the stationary blade, facilitating the sliding of hair such as beards into and out of the stationary blade from the front and sides, thus improving hair intake efficiency, but also prevents the teeth in the moving blade from getting stuck in the trimming groove of the trimming blade, ensuring the trimming performance of hair such as beards and improving the safety of using the trimming tool.

[0007] To solve the above technical problems, the present invention provides a trimming blade to prevent tooth jamming, comprising a body and a side plate placed on at least one side of a panel. The body has at least one panel that contacts the skin. The panel has several trimming grooves arranged side-by-side at intervals, with trimming teeth formed between adjacent grooves. The several trimming grooves form a tooth groove group, the length L1 of which is less than the panel length L2, so that reinforcing plates are formed at both ends of the panel. The tooth groove group includes trimming units and limiting units placed at both ends of the trimming units. From the front projection direction of the panel, each trimming groove in the trimming unit penetrates the panel at both ends. Each trimming groove in the limiting unit has at least one connecting rib that is coplanar with the inner surface of the panel. Each trimming groove in the limiting unit is sequentially connected to the reinforcing plate via the connecting rib, making the effective trimming cross-sectional area M1 of each trimming groove in the trimming unit greater than the effective trimming cross-sectional area M2 of each trimming groove in the limiting unit. When the moving blade swings back and forth along the panel, both ends of the moving blade are always directly below the limiting unit, thus limiting the two ends of the moving blade perpendicular to the swing direction through the connecting rib.

[0008] Preferably, the length of the reinforcing piece L3 is greater than the length of the limiting unit L4.

[0009] Preferably, the width W1 of the trimming groove in the limiting unit is less than or equal to the width W2 of each trimming groove in the trimming unit.

[0010] Preferably, the width W3 of the trimming teeth between adjacent trimming slots in the limiting unit is greater than or equal to the width W4 of the trimming teeth between adjacent trimming slots in the trimming unit.

[0011] Preferably, each trimming groove in the limiting unit has a connecting rib formed therein, and the connecting ribs in each trimming groove are arranged in a straight line or interlaced and connected to the reinforcing plate as a whole.

[0012] Preferably, the limiting unit includes at least two adjacent trimming slots.

[0013] Preferably, each trimming tooth is perpendicular or inclined to the two sides of the panel.

[0014] Preferably, side panels are provided on both sides of the panel, the panel is perpendicular or inclined to the side panels, and limit grooves and snap-fit ​​grooves are formed on each side panel.

[0015] Based on the aforementioned trimmer blade, the applicant also proposes a technical solution for a trimmer head assembly, including the aforementioned trimmer blade to prevent tooth jamming, and... The pruning blade is detachably fixed to the stationary blade holder; The moving blade holder, which is placed inside the stationary blade holder and can swing back and forth, is located between the stationary blade holder and the trimming blade, forming a whole that can be disassembled and assembled synchronously with the stationary blade holder and the trimming blade. The moving blade is mounted on the moving blade holder and its outer surface remains in contact with the inner surface of the cutting blade's central panel under the action of the elastic element; and the moving blade is provided with a number of spaced moving blade teeth. Among them, the length L5 of the moving blade is greater than or equal to the length L1 of the tooth groove group in the trimming blade, so that both ends of the moving blade are directly below the limiting unit in any state, and the connecting rib forms a limit on both ends of the moving blade perpendicular to the swing direction.

[0016] Preferably, at least one moving tooth width W5 at both ends of the moving blade is greater than the trimming groove width W1 in the upper limit unit of the panel of the trimming blade.

[0017] The beneficial effect of this invention is that a trimming unit is provided in the middle area of ​​the panel, and a limiting unit is provided on both sides of the trimming unit. Each trimming groove in the trimming unit has two ends that pass through both sides of the panel, and at least one connecting rib that is coplanar with the inner surface of the panel is added in each trimming groove of the limiting unit. When the moving blade swings back and forth along the inner surface of the panel and a warping phenomenon occurs, the two ends of the moving blade are always directly below the limiting unit. At this time, the connecting rib that is coplanar with the inner surface of the panel can axially limit the two ends of the moving blade (axial direction refers to the direction perpendicular to the swing direction). Even if the moving blade warps due to the influence of hair such as beard, the moving teeth at both ends of the moving blade cannot be stuck in the trimming groove in the limiting unit due to the obstruction of the connecting rib, thus ensuring the continuity of the reciprocating swing of the moving blade and the trimming performance of hair such as beard. Attached Figure Description

[0018] Figure 1This is a three-dimensional structural diagram of the existing thin-blade U-shaped static knife described in the background art.

[0019] Figure 2 The first embodiment of the existing stationary blade for bending rigid sheets into a U-shape as described in the background art.

[0020] Figure 3 This is a cross-sectional assembly drawing of the first embodiment of a stationary blade for bending rigid sheets into a U-shape, as described in the background art.

[0021] Figure 4 This is the second embodiment of the existing rigid sheet bending U-shaped static knife described in the background art.

[0022] Figure 5 This is a three-dimensional structural diagram of a trimmer blade designed to prevent tooth jamming according to an embodiment of the present invention.

[0023] Figure 6 This is a front view structural diagram of a trimmer blade designed to prevent tooth jamming according to an embodiment of the present invention.

[0024] Figure 7 This is a cross-sectional assembly diagram of the trimmer blade for preventing tooth jamming according to an embodiment of the present invention.

[0025] Figure 8 for Figure 7 Sectional view of the structure at point AA

[0026] Figure 9 for Figure 7 Sectional view of the middle BB section

[0027] Figure 10 This is a second embodiment of the trimmer blade for preventing tooth jamming according to the present invention.

[0028] Figure 11 This is a three-dimensional assembly structure diagram of a cutter head assembly according to an embodiment of the present invention.

[0029] Figure 12 This is a three-dimensional cross-sectional view of the assembly structure of a cutter head assembly according to an embodiment of the present invention. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 5-12 Further explanation of the embodiments of the present invention:

[0031] This invention relates to a trimming blade designed to prevent tooth jamming. It includes a body 1, which has at least one panel 11 in contact with the skin and a side plate 12 placed on at least one side of the panel 11. The panel 11 has several trimming grooves 3 arranged side-by-side at intervals, with trimming teeth 4 formed between adjacent grooves 3. The several trimming grooves 3 constitute a tooth groove group 5. The length L1 of the tooth groove group is less than the length L2 of the panel, causing reinforcing plates 111 to form at both ends of the panel 11. By controlling the length L1 of the tooth groove group in the control panel 11, reinforcing plates 111 are formed at both ends of the panel 11. During hair trimming, the reinforcing plates 111 effectively enhance the overall working strength of the trimming blade, preventing the tooth groove group 5 in the trimming blade from twisting and deforming, thus ensuring hair trimming performance.

[0032] To improve the hair trimming efficiency of the trimmer blades and prevent the moving teeth 81 of the moving blade 8 from getting stuck in the trimming groove 3, the tooth groove group 5 in the panel 11 is configured in two ways. This configuration is specifically designed based on the daily usage habits of most users. This is because most users, when trimming beards and other hair, generally use the middle area of ​​the panel 11 to align with the area of ​​the skin where beards and other hair grow. Therefore, based on the usage habits of most people, a trimming unit 51 is set in the middle area of ​​the panel 11, and limiting units 52 are set on both sides of the trimming unit 51. From the front projection direction of the panel 11, the two ends of each trimming groove 3 in the trimming unit 51 are respectively through the panel 11, so that the beards and other hair to be trimmed can enter the trimming groove 3 from either the front or the sides of the panel 11, ensuring the efficiency of hair entry.

[0033] As the moving blade 8 reciprocates and cuts along the panel 11, it is affected by hair such as beard, causing its two ends to form a seesaw effect, that is, the two ends of the moving blade 8 alternately lift up. To prevent the moving blade teeth 81 from getting stuck in the trimming grooves 3 in the limiting unit 52 inside the panel 11 when the two ends of the moving blade 8 lift up, thus preventing tooth jamming, each trimming groove 3 in the limiting unit 52, although its two sides respectively penetrate through both sides of the panel 11, is provided with at least one connecting rib 13 in each trimming groove 3 in the limiting unit 52, and the bottom surface of the connecting rib 13 is coplanar with the inner surface of the panel 11. At least one connecting rib 13 coplanar with the inner surface of the panel 11 is added to each trimming groove 3 in the limiting unit 52. When the moving blade 8 swings back and forth along the inner surface of the panel 11 and a rocking phenomenon occurs, both ends of the moving blade 8 are always directly below the limiting unit 52. At this time, the connecting rib 13 coplanar with the inner surface of the panel 11 can axially limit both ends of the moving blade 8 (axial direction refers to the direction perpendicular to the swing direction). Even if the moving blade 8 rocks due to the influence of hair such as beard, the moving teeth 81 at both ends of the moving blade 8 cannot be stuck into the trimming groove 3 in the limiting unit 52 due to the obstruction of the connecting rib 13, thus ensuring the continuity of the reciprocating swing of the moving blade 8 and the trimming performance of hair such as beard.

[0034] To reduce the production cost of the trimming blades and improve the hair trimming effect, the thickness of the panel 11 is less than 0.5mm. The thinner the panel 11, the shorter the stubble remaining on the skin surface after the beard is cut, resulting in a better hair trimming effect. However, due to the thinner panel 11, the working intensity of the trimming teeth 4 between adjacent trimming slots 3 is relatively reduced. When the moving blade 8 swings back and forth along the panel 11 and a rocking phenomenon occurs, the moving teeth 81 in the moving blade 8 will collide or impact with the trimming teeth 4 of the adjacent trimming slots 3 in the limiting unit 52, causing the trimming teeth 4 in the limiting unit 52 to deform and affecting the reciprocating swing of the moving blade 8. To address this, at least one connecting rib 13 is sequentially installed in each trimming groove 3 of the limiting unit 52 and connected to the reinforcing plate 111. In this way, the connecting rib 13 not only prevents the moving blade teeth 81 of the moving blade 8 from getting stuck in the trimming groove 3 of the limiting unit 52, thus preventing tooth jamming, but also enhances the working strength of each trimming tooth 4 in the limiting unit 52, preventing bending and deformation of each trimming tooth 4 in the limiting unit 52, and ensuring the working stability of the reciprocating swing of the moving blade 8 and the trimming performance of beards and other hairs.

[0035] Secondly, since each trimming groove 3 in the limiting unit 52 is equipped with a connecting rib 13, and each trimming groove 3 in the trimming unit 51 extends through both sides of the panel 11, due to the influence of the connecting rib 13, when the moving blade 8 swings back and forth along the panel 11, the effective trimming area M1 of the moving blade 8 and each trimming groove 3 in the trimming unit 51 is greater than the effective trimming cross-sectional area M2 of the moving blade 8 and each trimming groove 3 in the limiting unit 52.

[0036] By setting a trimming unit 51 in the middle area of ​​the area, and making the two ends of each trimming groove 3 in the trimming unit 51 pass through the two ends of the panel 11 respectively, the effective trimming cross-sectional area M1 of each trimming groove 3 in the trimming unit 51 can be maximized, thereby maximizing the trimming efficiency and hair trimming performance of the trimming blades for beards and other hairs.

[0037] By adding connecting ribs 13 to each trimming groove 3 in the limiting unit 52, while satisfying the requirement for introducing hair such as beards, the connecting ribs 13 can also restrict and block the two ends of the moving blade 8, preventing tooth jamming. Of course, the trimming grooves 3 can also be omitted in the limiting unit 52, forming a plate shape like the reinforcing plate 111. Although this can minimize the possibility of tooth jamming at the two ends of the moving blade 8, it relatively reduces the utilization rate of the panel 11 surface and reduces the area for introducing hair such as beards in the panel 11. Therefore, providing trimming grooves 3 with connecting ribs 13 in the limiting unit 52 is the preferred embodiment.

[0038] The aforementioned effective trimming area refers to the area in which the outer surface of the moving blade 81 and the inner surface of the panel 11 are in contact and can be used for introducing hair such as beards. Since a connecting rib 13 is added to the limiting unit 52, the area where the connecting rib 13 is set cannot be used for introducing hair due to the occupation of the connecting rib 13, which correspondingly reduces the trimming area between the limiting unit 52 and the moving blade 81, and reduces the effective trimming area M2 between the limiting unit 52 and the moving blade 81.

[0039] To enhance the working strength of the trimming blade and prevent twisting and deformation during hair trimming, the length of the reinforcing plate L3 is greater than the length of the limiting unit L4. Because the moving blade 8 experiences a rocker-like phenomenon at both ends when it reciprocates along the inner surface of the panel 11, alternately rocking up and colliding with or impacting the trimming teeth 4 in the limiting unit 52, controlling the length of the reinforcing plate L3 maximizes the working strength of each trimming groove 3 and trimming tooth 4 in the limiting unit 52 of the panel 11. This effectively prevents twisting and deformation of the trimming grooves 3 or trimming teeth 4 in the limiting unit 52, ensuring the stability, continuity, and hair trimming performance of the moving blade 8's reciprocating oscillation along the inner surface of the panel 11.

[0040] When the moving blade 8 swings back and forth along the panel 11, causing a rocker-like phenomenon, the two ends of the moving blade 8 will collide or impact the trimming teeth 4 in the limiting unit 52. To improve the working strength of each trimming tooth 4 in the limiting unit 52, the width W1 of the trimming groove 3 in the limiting unit 52 is less than or equal to the width W2 of each trimming groove 3 in the trimming unit 51. By controlling the width W1 of the trimming groove 3 in the limiting unit 52 to be less than the width W2 of each trimming groove 3 in the trimming unit 51, the distance between adjacent trimming grooves 3 in the limiting unit 52 is reduced. This not only ensures the introduction of hair such as beards into each trimming groove 3 of the limiting unit 52, improving the surface utilization of the panel 11, but also enhances the working strength of each trimming groove 3 and trimming tooth 4 in the limiting unit 52, preventing the trimming teeth 4 or trimming groove 3 in the limiting unit 52 from twisting or deforming. Similarly, the width W3 of the trimming tooth 4 between adjacent trimming grooves 3 in the limiting unit 52 is greater than or equal to the width W4 of the trimming tooth 4 between adjacent trimming grooves 3 in the trimming unit 51. Increasing the width W3 of each trimming tooth 4 in the limiting unit 52 also increases the working strength of the limiting unit 52, preventing the tearing deformation that occurs when the moving blade 8 swings back and forth and collides with or impacts the limiting unit 52 and the trimming tooth 4, thus ensuring the stability of the reciprocating swing of the moving blade 8 and the hair trimming performance.

[0041] To ensure the maximum hair introduction efficiency of each trimming groove 3 within the limiting unit 52 while simultaneously increasing its working strength, each trimming groove 3 in the limiting unit 52 has a connecting rib 13 formed therein. Furthermore, the connecting ribs 13 within each trimming groove 3 are arranged in a straight line or interlaced and connected to the reinforcing plate 111 as a single unit. While adding multiple connecting ribs 13 to each trimming groove 3 in the limiting unit 52 could increase its working strength, this would undoubtedly reduce the surface area of ​​the limiting unit 52, decreasing the introduction of hair such as beard hair and lowering the hair trimming performance of the trimming blade. Therefore, providing one connecting rib 13 in each trimming groove 3 of the limiting unit 52 is the optimal implementation. Whether the connecting ribs 13 are connected in a straight line or interlaced can be determined according to user needs; this embodiment does not impose further restrictions on the specific configuration.

[0042] In actual implementation, the limiting unit 52 includes at least two adjacent trimming grooves 3. The number of trimming grooves 3 depends primarily on the length of the moving blade 8. Specifically, the requirement is that both ends of the moving blade 8 remain directly below the limiting unit 52 during its reciprocating swing. If the moving blade 8 is short, the number of trimming grooves 3 in the limiting unit 52 can be appropriately increased, for example, three, four, or more trimming grooves 3, ensuring that each adjacent trimming groove 3 is blocked and limited axially by at least one connecting rib 13. However, in this embodiment, the length of the moving blade 8 is slightly greater than or matches the length of the toothed groove group 5. Therefore, providing two trimming grooves 3 in the limiting unit 52 is sufficient to prevent the moving blade 8 from jamming when a rocker plate appears. Therefore, providing two trimming grooves 3 in the limiting unit 52 is the preferred implementation.

[0043] To improve the efficiency of trimming beards and other hairs, each trimming tooth 4 is staggered vertically or inclined relative to the two sides of the panel 11. The staggered vertical shape means that the trimming tooth 4 is in two or three segments, with each segment of the trimming tooth 4 staggered by a certain distance. In this embodiment, the trimming tooth 4 is staggered vertically relative to the two sides of the panel 11, with two segments of vertical trimming teeth 4, staggered by a tooth width. This structure of the trimming tooth 4 can not only delay the time for beards and other hairs to slide out of the trimming groove 3, giving the moving blade 8 more time to swing and cut, thus improving the efficiency of trimming beards and other hairs; at the same time, it can also ensure that the moving blade teeth 81 in the moving blade 8 always maintain partial contact with the cutting edge in the trimming tooth 4, and the staggered trimming tooth 4 can block the moving blade teeth 81 in the moving blade 8, preventing the moving blade teeth 81 in the moving blade 8 from getting stuck in the trimming groove 3.

[0044] Of course, the trimming teeth 4 can also be inclined, that is, the trimming teeth 4 are inclined at a certain angle relative to the two sides of the panel 11. In this embodiment, the inclination angle of the trimming teeth 4 is less than 30°. The use of inclined trimming teeth 4 not only delays the hair from sliding out of the trimming groove 3, but also keeps part of it in contact with the moving blade teeth 81 to block it and prevent the teeth from getting stuck; at the same time, the inclined trimming teeth 4 can also maintain a certain cutting angle with the moving blade teeth 81 in the moving blade 8, thereby improving the hair trimming performance.

[0045] To facilitate the production and assembly of the trimming blade, side plates 12 are provided on both sides of the panel 11. The panel 11 is perpendicular or inclined relative to the side plates 12, and each side plate 12 has a limiting groove 121 and a snap-fit ​​groove 122. By providing the side plates 12, during assembly, the limiting groove 121 and snap-fit ​​groove 122 on the side plates 12 can be used to detachably fix it to the stationary blade holder 6. In actual embodiments, the panel 11 can be perpendicular or inclined relative to the side plates 12, such as... Figure 8 , 9 As shown in Figure 10, whether it is vertical or inclined can be determined according to the actual situation of the cutter head assembly, and this embodiment does not make further limitations.

[0046] like Figures 11-12 As shown, based on the above-mentioned trimming blade, the applicant also proposes a technical solution for a blade head assembly, including the above-mentioned trimming blade to prevent tooth jamming, and a stationary blade seat 6, wherein the limiting groove 121 and the snap-fit ​​groove 122 on the side plate 12 of the trimming blade are detachably connected and fixed to the stationary blade seat 6.

[0047] The movable blade holder 7, located within the stationary blade holder 6, is limited to reciprocating movement between the stationary blade holder 6 and the trimming blade, forming a unit that can be simultaneously disassembled and assembled. The reciprocating movement is limited to the stationary blade holder 6 because the stationary blade holder 6 is a frame-like structure with sequentially connected edges. When the trimming blade is detachably mounted on the stationary blade holder 6, it effectively seals off the upper part of the frame-like stationary blade holder 6. Simultaneously, two bridging plates 61 are provided at the lower end of the stationary blade holder 6, with the distance between the two bridging plates 61 being less than the length of the movable blade holder 7, thus blocking the lower end of the stationary blade holder 6. Therefore, when the movable blade holder 7 is placed within the stationary blade holder 6, it is restricted by the trimming blade and the bridging plates 61, and can only reciprocate within the stationary blade holder 6, but cannot detach from it. Only after the trimming blade is disassembled can the movable blade holder 7 be removed from the stationary blade holder 6.

[0048] The movable blade 8 is mounted on the movable blade holder 7 and its outer surface remains in contact with the inner surface of the panel 11 of the trimmer blade under the action of the elastic member 9. Furthermore, the movable blade 8 is provided with a number of spaced movable blade teeth 81. The length L5 of the movable blade 8 is greater than or equal to the length L1 of the tooth groove group in the trimmer blade, so that both ends of the movable blade 8 are directly below the limiting unit 52 in any state, and the connecting rib 13 forms a limit on both ends of the movable blade 8 perpendicular to the swing direction.

[0049] In actual production, the bridging plate 61 is U-shaped and extends outwards towards the bottom of the stationary blade holder 6. The two ends of the U-shaped bridging plate 61 connect to the bottom of the side walls of the stationary blade holder 6 to seal it, preventing the moving blade holder 7 from detaching from the stationary blade holder 6 and allowing it to swing back and forth relative to it. This facilitates the assembly and disassembly of the trimming blade, moving blade 8, moving blade holder 7, and stationary blade holder 6 as a single unit. Secondly, the extension of the bridging plate 61 outwards towards the bottom of the stationary blade holder 6 increases the distance between the bridging plate 61 and the bottom of the moving blade holder 7. This increases the length of the elastic element 9 and enhances its preset elastic force. This not only effectively ensures that the moving blade 8 remains in contact with the inner surface of the panel 11, but also allows for sufficient shearing force between the moving blade 8 and the trimming blade, ensuring the performance of trimming hair such as beards while minimizing the warping phenomenon that occurs during the reciprocating swing of the moving blade 8.

[0050] To prevent the moving teeth 81 in the moving blade 8 from getting stuck in the trimming groove 3 in the upper limit unit 52 of the trimming blade, thus causing a jamming phenomenon, the width W5 of at least one moving tooth 81 at both ends of the moving blade 8 is greater than the width W1 of the trimming groove 3 in the upper limit unit 52 of the trimming blade panel 11. By increasing the width W5 of at least one moving tooth 81 at both ends of the moving blade 8, the width difference can be used to prevent the moving teeth 81 at both ends of the moving blade 8 from getting stuck in the trimming groove 3 in the limit unit 52 when the blade tilts, thus ensuring the smooth operation of the moving blade 8 and the trimming performance of beards and other hairs.

[0051] 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 trimmer blade for preventing tooth jamming, comprising a body (1), the body (1) having at least one panel (11) in contact with skin and a side plate (12) disposed on at least one side of the panel (11); the panel (11) having a plurality of trimming grooves (3) arranged side by side at intervals, wherein trimming teeth (4) are formed between adjacent trimming grooves (3); characterized in that A plurality of trimming grooves (3) constitute a toothed groove group (5). The length L1 of the toothed groove group (5) is less than the length L2 of the panel (11), so that reinforcing plates (111) are formed at both ends of the panel (11). The toothed groove group (5) includes a trimming unit (51) and a limiting unit (52) placed at both ends of the trimming unit (51). In the view from the front projection direction of the panel (11), each trimming groove (3) in the trimming unit (51) penetrates the panel (11) at both ends. Each trimming groove (3) in the limiting unit (52) has at least one connecting line that is coplanar with the inner surface of the panel (11). The connecting rib (13) and the trimming groove (3) in the limiting unit (52) are connected to the reinforcing plate (111) in sequence through the connecting rib (13) to form a whole, so that the effective trimming cross-sectional area M1 of each trimming groove (3) in the trimming unit (51) is greater than the effective trimming cross-sectional area M2 of each trimming groove (3) in the limiting unit (52); and when the moving blade (8) swings back and forth along the panel (11), the two ends of the moving blade (8) are always directly below the limiting unit (52), so that the connecting rib (13) can form a limit perpendicular to the swing direction for the two ends of the moving blade (8).

2. The trimmer blade for preventing tooth jamming according to claim 1, characterized in that... The length L3 of the reinforcing plate (111) is greater than the length L4 of the limiting unit (52).

3. The trimmer blade for preventing tooth jamming according to claim 1, characterized in that... The width W1 of the trimming groove (3) in the limiting unit (52) is less than or equal to the width W2 of each trimming groove (3) in the trimming unit (51).

4. The trimmer blade for preventing tooth jamming according to claim 1, characterized in that... The width W3 of the trimming teeth (4) between adjacent trimming slots (3) in the limiting unit (52) is greater than or equal to the width W4 of the trimming teeth (4) between adjacent trimming slots (3) in the trimming unit (51).

5. The trimmer blade for preventing tooth jamming according to claim 1, characterized in that... Each trimming groove (3) in the limiting unit (52) has a connecting rib (13) formed therein. Furthermore, the connecting ribs (13) in each trimming groove (3) are arranged in a straight line or interlaced with each other and are connected to the reinforcing plate (111) as a whole.

6. The trimmer blade for preventing tooth jamming according to claim 1, characterized in that... The limiting unit (52) includes at least two adjacent trimming slots (3).

7. The trimmer blade for preventing tooth jamming according to claim 1, characterized in that... Each trimming tooth (4) is vertically or inclined relative to the two sides of the panel (11).

8. The trimmer blade for preventing tooth jamming according to claim 1, characterized in that... Side plates (12) are provided on both sides of the panel (11). The panel (11) is perpendicular or inclined to the side plates (12), and a limiting groove (121) and a snap-fit ​​groove (122) are formed on each side plate (12).

9. A cutter head assembly, characterized in that... The trimmer blade comprising the anti-jamming trimmer blade as described in any one of claims 1 to 8, and, Stationary blade holder (6), the trimming blade is detachably fixed on the stationary blade holder (6); The moving blade holder (7) is placed inside the stationary blade holder (6) and can swing back and forth. It is positioned between the stationary blade holder (6) and the trimming blade, forming a whole that can be disassembled and assembled synchronously with the stationary blade holder (6) and the trimming blade. The moving blade (8) is mounted on the moving blade holder (7) and its outer surface remains in contact with the inner surface of the trimming blade panel (11) under the action of the elastic member (9); and a number of spaced moving blade teeth (81) are provided on the moving blade (8). Among them, the length L5 of the moving blade (8) is greater than or equal to the length L1 of the tooth groove group (5) in the trimming blade, so that both ends of the moving blade (8) are directly below the limiting unit (52) in any state, so that the connecting rib (13) forms a limit perpendicular to the swing direction on both ends of the moving blade (8).

10. The cutter head assembly according to claim 9, characterized in that... At least one moving tooth (81) at both ends of the moving blade (8) has a width W5 greater than the width W1 of the trimming groove (3) in the upper limit unit (52) of the panel (11) of the trimming blade.

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