Pruning blade capable of preventing tooth clamping and tool bit assembly

Abstract

The trimming blade and tool bit assembly is characterized in that the length L1 of a tooth groove set is smaller than the length L2 of a panel so that reinforcing pieces can be formed at the two ends of the panel respectively, and the tooth groove set comprises a trimming unit and limiting units arranged at the two ends of the trimming unit; wherein the two ends of each trimming groove in the trimming unit penetrate through the panel, at least one connecting rib which is coplanar with the inner surface of the panel is arranged in each trimming groove in the limiting unit, and the trimming grooves in the limiting unit are sequentially connected with the reinforcing sheet into a whole through the connecting ribs. The device has the beneficial effects that at least one connecting rib which is coplanar with the inner surface of the panel is additionally arranged in each trimming groove in the limiting unit, and when the movable blade swings back and forth along the inner surface of the panel and is warped, the two ends of the movable blade are always located under the limiting unit and blocked by the connecting ribs, so that the movable blade can be trimmed. The movable cutter teeth at the two ends of the movable blade cannot be clamped into the trimming grooves in the limiting units, and the continuous inertia of reciprocating swing of the movable blade and the trimming performance of hair such as beards are guaranteed.

Description

Technical Field

[0001] The present invention relates to a trimming blade for trimming hair such as beards, and more particularly to a trimming blade and a cutter head assembly that prevent tooth jamming, which are mainly applied to the fields of personal care tools such as razors and hair clippers. Background Art

[0002] There are mainly two types of stationary blades in existing reciprocating hair trimming tools. One is a flexible thin sheet, which is bent as a whole into a U shape, and several beard holes for beard entry are provided at the bent part of the thin sheet, as shown in Figure 1 Shown. Or, please refer to the Chinese patent with the publication number CN220051928U applied by the applicant.

[0003] The other is a hard sheet material bent into an inverted U shape, but it can also be divided into two types according to the different shapes of the beard holes: The first type is as shown in Figures 2 to 4 Shown (or it can also be referred to the Chinese patent, publication number: CN115139344A): In the stationary blade bent into an inverted U shape, several trimming grooves A1 are arranged at intervals, and trimming teeth A2 are formed between adjacent trimming grooves A1. Connecting ribs A3 are respectively arranged in the middle of all the trimming grooves A1 to divide each trimming groove A1 into two. Although the working strength of the stationary blade with this structure is relatively high, in actual trimming, affected by the connecting ribs A3, it not only hinders the entry of hair such as beards from the front of the stationary blade into the trimming grooves A1, especially curly long beards are more likely to be blocked and difficult to enter, reducing the beard entry efficiency. At the same time, due to the existence of the connecting ribs A3, the effective trimming area of the stationary blade is correspondingly occupied, reducing the actual available trimming area and lowering the hair trimming efficiency.

[0004] The second type is as shown in Figures 5 to 6 Shown (it can also be referred to the Chinese patent, publication number: CN108406859A). In the stationary blade, several trimming teeth B1 are arranged at intervals, and trimming grooves B2 are formed between adjacent trimming teeth B1. This structure is convenient for hair such as beards to slide in and out from the front or side of the stationary blade, improving the beard entry efficiency. And, no connecting ribs are added between the trimming grooves, so it will not occupy the effective trimming area of the stationary blade, ensuring the hair trimming efficiency of hair such as beards.

[0005] However, in actual use, there are also some technical defects. For example, the movable blade fits against the inner wall of the stationary blade under the action of the elastic member, and during the reciprocating swing trimming process along the stationary blade, its swinging process does not always maintain a horizontal movement state as expected in the design. Affected by factors such as the obstruction of beards and other hairs, a seesaw phenomenon will form at both ends of the movable blade, that is, one end of the movable blade will be obstructed by the beards and other hairs and will move downward, while the other end will tilt up. At this time, the movable blade teeth at the tilted end of the movable blade are very likely to get stuck in the trimming groove of the stationary blade during the reciprocating swing, resulting in a stuck tooth phenomenon, which affects the trimming performance of beards and other hairs and may even damage the trimming tool. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a trimming blade and a blade head assembly that can prevent teeth from getting stuck. The trimming blade can not only maximize the surface utilization rate of the static blade, but also facilitate beards and other hair to slide in and out from the front and side of the static blade, thereby improving the hair feeding efficiency; at the same time, it can also prevent the blade teeth in the dynamic blade from getting stuck in the trimming groove of the trimming blade, thereby ensuring the trimming performance of beards and other hair, and improving the safety of using the trimming tool.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is a trimming blade that prevents teeth from getting stuck, comprising a body and a side panel disposed on at least one side of a panel, the body having at least one panel in contact with the skin; a plurality of trimming grooves arranged side by side and spaced apart are disposed on the panel, and trimming teeth are formed between adjacent trimming grooves; the plurality of trimming grooves constitute a tooth groove group, the tooth groove group length L1 is less than the panel length L2 so that reinforcement sheets are formed at both ends of the panel, the tooth groove group comprises a trimming unit and a limiting unit disposed at both ends of the trimming unit; wherein, from the front projection direction of the panel, both ends of each trimming groove in the trimming unit pass through the panel, each trimming groove in the limiting unit has at least one connecting rib that forms a coplanar surface with the inner surface of the panel, and each trimming groove in the limiting unit is connected to the reinforcement sheet in turn through the connecting rib, so that the effective trimming cross-sectional area M1 of each trimming groove in the trimming unit is greater than the effective trimming cross-sectional area M2 of each trimming groove in the limiting unit; and when the movable blade swings back and forth along the panel, the two ends of the movable blade are always directly below the limiting unit, so that the two ends of the movable blade are limited perpendicular to the swinging direction through the connecting rib.

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

[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, a trimming tooth width W3 between adjacent trimming grooves in the limiting unit is greater than or equal to a trimming tooth width W4 between adjacent trimming grooves in the trimming unit.

[0011] Preferably, a connecting rib is respectively formed in each trimming groove of the limiting unit, and the connecting ribs in each trimming groove are arranged in a straight line or staggered with each other and connected to the reinforcing piece as a whole.

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

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

[0014] Preferably, side plates are respectively arranged on both sides of the panel, the panel is perpendicular or inclined to the side plates, and limiting grooves and buckle grooves are formed on each side plate.

[0015] Based on the above trimming blade, the applicant also proposes a technical solution for a cutter head assembly, including the above trimming blade for preventing tooth jamming, and a stationary knife seat, the trimming blade is detachably fixed on the stationary knife seat; a moving knife seat, which is placed in the stationary knife seat and is limited between the stationary knife seat and the trimming blade in a reciprocating swing manner to form an integral body that can be disassembled and assembled synchronously with the stationary knife seat and the trimming blade; a moving blade, which is installed on the moving knife seat and its outer surface always keeps in contact with the inner surface of the panel in the trimming blade under the action of an elastic member; and a plurality of moving knife teeth are arranged at intervals on the moving blade; Wherein, 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 always directly below the limiting unit in any state, and the connecting rib forms a limit perpendicular to the swing direction on both ends of the moving blade.

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

[0017] The beneficial effect of the present invention is that a trimming unit is arranged in the middle area of the panel, and limiting units are respectively arranged on both sides of the trimming unit. Among them, both ends of each trimming groove in the trimming unit penetrate through both sides of the panel, and at least one connecting rib coplanar with the inner surface of the panel is added in each trimming groove in the limiting unit. When the moving blade reciprocates and swings along the inner surface of the panel and a seesaw phenomenon occurs, both ends of the moving blade are always directly below the limiting unit. At this time, the connecting rib coplanar with the inner surface of the panel can form an axial limit on both ends of the moving blade (the axial direction refers to the direction perpendicular to the swing direction). Even if the moving blade has a seesaw phenomenon under the influence of beards and other hairs, due to the blocking of the connecting rib, the moving knife teeth at both ends of the moving blade cannot be stuck into the trimming groove in the limiting unit, ensuring the continuity of the reciprocating swing of the moving blade and the trimming performance of beards and other hairs. Description of the Drawings

[0018] Figure 1Stereoscopic structure diagram of the existing thin - sheet U - shaped stationary knife described in the background art

[0019] Figure 2 The first embodiment of the existing stationary knife with a hard sheet bent into a U - shape described in the background art

[0020] Figure 3 Cross - sectional assembly diagram of the first embodiment of the existing stationary knife with a hard sheet bent into a U - shape described in the background art

[0021] Figure 4 The second embodiment of the existing stationary knife with a hard sheet bent into a U - shape described in the background art

[0022] Figure 5 Stereoscopic structure diagram of the trimming blade for preventing tooth jamming in the embodiment of the present invention

[0023] Figure 6 Front - view structure diagram of the trimming blade for preventing tooth jamming in the embodiment of the present invention

[0024] Figure 7 Cross - sectional assembly structure diagram of the trimming blade for preventing tooth jamming in the embodiment of the present invention

[0025] Figure 8 For Figure 7 Cross - sectional structure diagram at A - A in

[0026] Figure 9 For Figure 7 Cross - sectional structure diagram at B - B in

[0027] Figure 10 The second embodiment of the trimming blade for preventing tooth jamming in the embodiment of the present invention

[0028] Figure 11 Stereoscopic assembly structure diagram of a cutter head assembly in the embodiment of the present invention

[0029] Figure 12 Stereoscopic cross - sectional assembly structure diagram of a cutter head assembly in the embodiment of the present invention Detailed implementation manners

[0030] The following further describes the embodiments of the present invention in conjunction with the appended Figures 5 to 12 drawings:

[0031] The present invention is a trimming blade for preventing teeth from getting stuck, comprising a body 1, wherein the body 1 is provided with at least one panel 11 in contact with the skin and a side panel 12 disposed on at least one side of the panel 11; a plurality of trimming grooves 3 arranged side by side and spaced apart are disposed on the panel 11, and trimming teeth 4 are formed between adjacent trimming grooves 3; the plurality of trimming grooves 3 constitute a tooth groove group 5, wherein a tooth groove group length L1 is less than a panel length L2, so that reinforcing sheets 111 are formed at both ends of the panel 11, and by controlling the tooth groove group length L1 in the panel 11, reinforcing sheets 111 are formed at both ends of the panel 11, respectively; during the hair trimming process, the reinforcing sheets 111 can effectively improve the overall working strength of the trimming blade, prevent the tooth groove group 5 in the trimming blade from being twisted and deformed, and ensure the hair trimming performance.

[0032] In order to improve the hair trimming efficiency of the trimming blade and prevent the moving blade teeth 81 of the moving blade 8 from getting stuck in the trimming groove 3 and causing a tooth jam, the tooth groove group 5 in the panel 11 is set to two types. This setting is also specially set according to the daily usage habits of most users, because most users basically use the middle area of ​​the panel 11 to aim at the area on the skin where the beard and other hair grow when trimming beards and other hair. Therefore, according to 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 respectively set on both sides of the trimming unit 51. Among them, from the front projection direction of the panel 11, the two ends of each trimming groove 3 in the trimming unit 51 pass through the panel 11 respectively, and the beard and other hair to be trimmed can enter the trimming groove 3 from the front or both sides of the panel 11. The hair entry efficiency of the beard and other hair is guaranteed.

[0033] When the movable blade 8 is reciprocatingly swung and cut along the panel 11, it is affected by the beard and other hairs, and a seesaw phenomenon will be formed at both ends of the movable blade 8, that is, the two ends of the movable blade 8 are alternately tilted, and in order to prevent the movable blade 8 from tilting at both ends, its movable blade teeth 81 are stuck in the trimming grooves 3 in the limiting unit 52 in the panel 11, resulting in the tooth-stuck phenomenon. Although the two sides of each trimming groove 3 in the limiting unit 52 pass through the two sides of the panel 11 respectively, at least one connecting rib 13 is provided in each trimming groove 3 in the limiting unit 52, and the bottom surface of the connecting rib 13 forms a coplanar surface with the inner surface of the panel 11. At least one connecting rib 13 coplanar with the inner surface of the panel 11 is provided in each trimming groove 3 in the limiting unit 52. When the movable blade 8 swings back and forth along the inner surface of the panel 11 and causes a seesaw phenomenon, the two ends of the movable 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 form an axial limit for the two ends of the movable blade 8 (the axial direction refers to the direction perpendicular to the swinging direction). Even if the movable blade 8 seesaws under the influence of beard and other hair, the movable blade teeth 81 at both ends of the movable blade 8 cannot be stuck in the trimming groove 3 in the limiting unit 52 due to the obstruction of the connecting rib 13, thereby ensuring the continuous inertia of the reciprocating swing of the movable blade 8 and the trimming performance of beard and other hair.

[0034] To reduce the production cost of the trimming blade and improve the hair trimming effect, the thickness of the panel 11 is less than 0.5 mm. The thinner the panel 11 is, the shorter the residual length of the stubble on the skin surface after the beard is cut, and the better the hair trimming effect. However, affected by the relatively thin thickness of the panel 11, the working intensity of the trimming teeth 4 between adjacent trimming grooves 3 will also decrease accordingly. When the moving blade 8 reciprocates along the panel 11 and exhibits a seesaw phenomenon, the moving teeth 81 of the moving blade 8 will collide or impact the trimming teeth 4 of the adjacent trimming grooves 3 in the limiting unit 52, resulting in deformation of the trimming teeth 4 in the limiting unit 52 and affecting the reciprocating swing of the moving blade 8. In response to this, at least one connecting rib 13 is sequentially arranged in each trimming groove 3 of the limiting unit 52 and connected integrally with the reinforcing piece 111. In this way, the connecting rib 13 not only serves to prevent the moving teeth 81 of the moving blade 8 from being caught in the trimming groove 3 of the limiting unit 52, preventing the occurrence of tooth jamming; at the same time, the connecting rib 13 can also enhance the working intensity of each trimming tooth 4 in the limiting unit 52, preventing the bending 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 hair trimming performance for beards and other hairs.

[0035] Secondly, since connecting ribs 13 are added to each trimming groove 3 of the limiting unit 52, and both ends of each trimming groove 3 in the trimming unit 51 penetrate through both sides of the panel 11, affected by the connecting ribs 13, when the moving blade 8 reciprocates along the panel 11, the effective trimming area M1 between the moving blade 8 and each trimming groove 3 in the trimming unit 51 is larger than the effective trimming cross-sectional area M2 between the moving blade 8 and each trimming groove 3 in the limiting unit 52.

[0036] By arranging the trimming unit 51 in the middle area of the area and making both ends of each trimming groove 3 in the trimming unit 51 penetrate through both 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, and the trimming efficiency and hair trimming performance of the trimming blade for beards and other hairs can be improved to the greatest extent.

[0037] By adding connecting ribs 13 to each trimming groove 3 in the limiting unit 52, under the condition of satisfying the introduction of beards and other hairs, the connecting ribs 13 can also play a role in restricting and blocking both ends of the moving blade 8 to prevent the occurrence of tooth jamming. Of course, trimming grooves 3 can also not be provided in the limiting unit 52, and it can be formed into a plate shape like the reinforcing piece 111. Although this can maximally avoid the occurrence of tooth jamming at both ends of the moving blade 8, relatively speaking, it reduces the utilization rate of the surface of the panel 11 and reduces the introduction area of beards and other hairs on the panel 11. Therefore, setting trimming grooves 3 with connecting ribs 13 in the limiting unit 52 is the preferred implementation method.

[0038] The above-mentioned effective trimming area refers to the area in the region where the outer surface of the moving cutter teeth 81 is in contact with the inner surface of the panel 11 and can be used for the introduction of beards and other hairs. Due to the addition of the connecting rib 13 in the limiting unit 52, the area where the connecting rib 13 is provided cannot be used for the introduction of hairs due to the occupation of the connecting rib 13, correspondingly reducing the trimming area between the limiting unit 52 and the moving cutter teeth 81, and reducing the effective trimming area M2 between the limiting unit 52 and the moving cutter teeth 81.

[0039] To improve the working strength of the trimming blade and avoid distortion during hair trimming, the length L3 of the reinforcing piece is greater than the length L4 of the limiting unit. Since the two ends of the moving blade 8 will have a seesaw phenomenon when reciprocatingly swinging along the inner surface of the panel 11, alternately tilting up and colliding or impacting the trimming teeth 4 in the limiting unit 52, by controlling the length L3 of the reinforcing piece, the working strength of each trimming groove 3 and trimming teeth 4 in the limiting unit 52 on the panel 11 can be maximally improved, effectively preventing the trimming grooves 3 or trimming teeth 4 in the limiting unit 52 from being distorted, and ensuring the smoothness, continuity and hair trimming performance of the reciprocating swing of the moving blade 8 along the inner surface of the panel 11.

[0040] When the moving blade 8 has a seesaw phenomenon during the reciprocating swing along the panel 11, 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. In this way, not only can it ensure the introduction of beards and other hairs into each trimming groove 3 of the limiting unit 52 and improve the surface utilization rate of the panel 11; at the same time, it can also improve the working strength of each trimming groove 3 and trimming teeth 4 in the limiting unit 52 and avoid the trimming teeth 4 or trimming grooves 3 in the limiting unit 52 from being distorted. Similarly, the width W3 of the trimming teeth 4 between adjacent trimming grooves 3 in the limiting unit 52 is greater than or equal to the width W4 of the trimming teeth 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 plays a role in increasing the working strength of the limiting unit 52, preventing distortion when the moving blade 8 reciprocatingly swings and collides or impacts the trimming teeth 4 in the limiting unit 52, and ensuring the smoothness of the reciprocating swing of the moving blade 8 and the hair trimming performance.

[0041] To ensure that while enhancing the working intensity of the lifting limit unit 52, the hair introduction efficiency of each trimming groove 3 in the limit unit 52 is maximally guaranteed, a connecting rib 13 is respectively formed in each trimming groove 3 of the limit unit 52. Moreover, the connecting ribs 13 in each trimming groove 3 are arranged in a straight line or staggered with each other and connected to the reinforcing piece 111 as a whole. Of course, multiple connecting ribs 13 can also be added in each trimming groove 3 of the limit unit 52, which will make the working intensity of each trimming groove 3 in the limit unit 52 higher. However, adding multiple connecting ribs 13 will undoubtedly occupy the surface area in the limit unit 52, reduce the introduction of beards and other hairs, and lower the hair trimming performance of the trimming blade. Therefore, setting one connecting rib 13 in each trimming groove 3 of the limit unit 52 is the optimal implementation method. As for whether the connecting ribs 13 are connected in a straight line in sequence or staggered with each other, it can be determined according to user requirements, and no further limitation is made in this specific embodiment.

[0042] In the actual implementation process, the limit unit 52 includes at least two adjacent trimming grooves 3. Of course, as for the number of trimming grooves 3 set, it mainly depends on the length of the moving blade 8. The specific requirement is that as long as the two ends of the moving blade 8 are always directly below the limit unit 52 during the reciprocating swing. If the length of the moving blade 8 is shorter, the number of trimming grooves 3 in the limit unit 52 can be appropriately increased. For example, three, four or more trimming grooves 3 can be set to ensure that at least one connecting rib 13 is used to block and limit the axial direction of the moving blade 8 in each adjacent trimming groove 3. However, in this embodiment, the length of the moving blade 8 is slightly larger than or matches the length of the tooth groove group 5. Therefore, setting two trimming grooves 3 in the limit unit 52 can prevent the moving blade 8 from getting stuck when the seesaw phenomenon occurs. Therefore, setting two trimming grooves 3 in the limit unit 52 is the preferred implementation method.

[0043] To improve the hair trimming efficiency of beards and other hairs, each trimming tooth 4 is in a misaligned vertical or inclined shape relative to the two side edges of the panel 11. The misaligned vertical shape means that the trimming tooth 4 is in two or three sections, and each section of the trimming tooth 4 is staggered by a certain distance in sequence. In this embodiment, the trimming tooth 4 is in a misaligned vertical shape relative to the two side edges of the panel 11, has two sections of vertical trimming teeth 4, and is staggered by one tooth width distance. By adopting this structure of the trimming tooth 4, not only can the sliding-out time of beards and other hairs entering the trimming groove 3 be delayed, which buys time for the swinging and cutting of the moving blade 8 and improves the hair trimming efficiency of beards and other hairs; at the same time, it can also make the moving cutter teeth 81 in the moving blade 8 always keep partial contact with the cutting edges in the trimming teeth 4, and use the misaligned trimming teeth 4 to block the moving cutter teeth 81 in the moving blade 8 to prevent the moving cutter 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 in an inclined shape, that is, the trimming teeth 4 form a certain inclination angle relative to the two side edges of the panel 11. In this embodiment, the inclination angle of the trimming teeth 4 is less than 30°. By using the inclined trimming teeth 4, it not only delays the hair from sliding out of the trimming groove 3 and always keeps part of it in contact with the moving cutter teeth 81 to play a blocking role to prevent the occurrence of tooth jamming; at the same time, the inclined trimming teeth 4 can also maintain a certain cutting angle with the moving cutter teeth 81 in the moving blade 8, improving the hair trimming performance.

[0045] For the convenience of the production and assembly of the trimming blade, side plates 12 are respectively provided on both sides of the panel 11. The panel 11 is perpendicular or inclined relative to the side plates 12, and a limiting groove 121 and a buckle groove 122 are formed on each side plate 12. By providing the side plates 12, during assembly, the limiting groove 121 and the buckle groove 122 provided on the side plates 12 can be used to form a detachable fixation with the stationary cutter base 6. In the actual implementation process, the panel 11 can be perpendicular or inclined relative to the side plates 12. For example, Figure 8 、 9 as shown in or 10. Whether to adopt a perpendicular shape or an inclined shape specifically can be determined according to the actual situation of the cutter head assembly, and this embodiment does not make further limitations.

[0046] As Figures 11 to 12 shown, on the basis of the above trimming blade, the applicant also proposes a technical solution for a cutter head assembly, including the above trimming blade for preventing tooth jamming, and the stationary cutter base 6. The limiting groove 121 and the buckle groove 122 on the side plate 12 of the trimming blade are detachably connected and fixed to the stationary cutter base 6;

[0047] The moving cutter base 7 is placed inside the stationary cutter base 6 and is limited to reciprocally swing between the stationary cutter base 6 and the trimming blade, forming an integral body that can be synchronously disassembled and assembled with the stationary cutter base 6 and the trimming blade; the so-called reciprocally swinging and being limited inside the stationary cutter base 6 means that the stationary cutter base 6 is a frame body connected in sequence around. When the trimming blade is detachably installed on the stationary cutter base 6, relatively, the upper end of the frame-shaped stationary cutter base 6 is closed. At the same time, two bridging plates 61 are provided at the lower end of the stationary cutter base 6. The distance between the two bridging plates 61 is less than the length of the moving cutter base 7 and blocks the lower end of the stationary cutter base 6. In this way, when the moving cutter base 7 is placed inside the stationary cutter base 6, restricted by the trimming blade and the bridging plates 61, the moving cutter base 7 can only reciprocally swing inside the stationary cutter base 6 and cannot be detached from the stationary cutter base 6. Only when the trimming blade is disassembled can the moving cutter base 7 be taken out of the stationary cutter base 6.

[0048] The movable blade 8 is mounted on the movable blade seat 7 and its outer surface is always kept in contact with the inner surface of the trimming blade middle panel 11 under the action of the elastic member 9; and a plurality of movable blade teeth 81 are arranged at intervals on the movable blade 8; wherein, the length L5 of the movable blade 8 is greater than or equal to the length L1 of the tooth groove group in the trimming blade, so that both ends of the movable blade 8 are directly below the limit unit 52 in any state, so that the connecting rib 13 forms a limit perpendicular to the swinging direction for the two ends of the movable blade 8.

[0049] In the actual production process, the bridge plate 61 is U-shaped and extends toward the outside of the bottom of the stationary knife seat 6, and the two ends of the U-shaped bridge plate 61 are connected to the bottom of the side walls of the stationary knife seat 6 to block the stationary knife seat 6, so that the movable knife seat 7 can only swing back and forth relative to the stationary knife seat 6 and cannot be separated from the stationary knife seat 6, which is convenient for the trimming blade, the movable blade 8, the movable knife seat 7 and the stationary knife seat 6 to form a whole for assembly and disassembly. Secondly, the bridge plate 61 extends toward the outside of the bottom end of the stationary knife seat 6, increasing the distance between the bridge plate 61 and the bottom of the movable knife seat 7, so that the length of the elastic member 9 can be increased, and the preset elastic force of the elastic member 9 can be increased, which not only effectively ensures that the movable blade 8 always fits the inner surface of the panel 11, but also the larger elastic force can form sufficient shear force between the movable blade 8 and the trimming blade, ensuring the trimming performance of beard and other hair, and can also minimize the seesaw phenomenon of the movable blade 8 during the reciprocating swing process.

[0050] In order to prevent the moving blade teeth 81 of the moving blade 8 from getting stuck in the trimming groove 3 in the upper limit unit 52 of the trimming blade, resulting in a tooth jam, the width W5 of at least one moving blade 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 blade tooth 81 at both ends of the moving blade 8, the moving blade teeth 81 at both ends of the moving blade 8 can be prevented from getting stuck in the trimming groove 3 in the limit unit 52 when the seesaw phenomenon occurs, thereby ensuring the running stability of the moving blade 8 and the trimming performance of beard and other hair.

[0051] The above embodiments should not be regarded as limiting 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 trimming blade for preventing teeth from getting stuck, comprising a body (1), the body (1) having at least one panel (11) in contact with the skin and a side panel (12) disposed on at least one side of the panel (11); a plurality of trimming grooves (3) arranged side by side and spaced apart are provided on the panel (11), and trimming teeth (4) are formed between adjacent trimming grooves (3); characterized in that A plurality of trimming grooves (3) form a tooth groove group (5); a length L1 of the tooth groove group (5) is less than a length L2 of the panel (11) so that reinforcement plates (111) are formed at both ends of the panel (11); the tooth groove group (5) comprises a trimming unit (51) and a limiting unit (52) disposed at both ends of the trimming unit (51); wherein, viewed from the front projection direction of the panel (11), both ends of each trimming groove (3) in the trimming unit (51) penetrate the panel (11), and each trimming groove (3) in the limiting unit (52) has at least one connecting line coplanar with the inner surface of the panel (11). The connecting ribs (13) are connected to the reinforcing sheet (111) in sequence, and each trimming groove (3) in the limiting unit (52) is connected to the reinforcing sheet (111) in sequence through the connecting ribs (13), 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 movable blade (8) reciprocates along the panel (11), the two ends of the movable blade (8) are always located directly below the limiting unit (52), so that the two ends of the movable blade (8) are limited perpendicular to the swinging direction by the connecting ribs (13).

2. The trimming blade for preventing teeth from getting stuck according to claim 1, characterized in that The length L3 of the reinforcing sheet (111) is greater than the length L4 of the limiting unit (52).

3. The trimming blade for preventing teeth from getting stuck 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 trimming blade for preventing teeth from getting stuck according to claim 1, characterized in that A width W3 of the trimming teeth (4) between adjacent trimming grooves (3) in the limiting unit (52) is greater than or equal to a width W4 of the trimming teeth (4) between adjacent trimming grooves (3) in the trimming unit (51).

5. The trimming blade for preventing teeth from getting stuck according to claim 1, characterized in that A connecting rib (13) is formed in each trimming groove (3) in the limiting unit (52), and the connecting ribs (13) in each trimming groove (3) are arranged in a straight line or staggered to be connected to the reinforcing plate (111) as a whole.

6. The trimming blade for preventing teeth from getting stuck according to claim 1, characterized in that The limiting unit (52) comprises at least two adjacent trimming grooves (3).

7. The trimming blade for preventing teeth from getting stuck according to claim 1, characterized in that Each trimming tooth (4) is in a vertical or inclined shape with respect to the edges on both sides of the panel (11).

8. The trimming blade for preventing teeth from getting stuck according to claim 1, characterized in that Side panels (12) are respectively provided on both sides of the panel (11); the panel (11) is vertical or inclined relative to the side panels (12); and a limiting groove (121) and a buckle groove (122) are formed on each side panel (12).

9. The cutter head assembly is characterized by A trimmer blade comprising the anti-jamming tooth according to any one of claims 1 to 8, and A stationary knife seat (6), on which the trimming blade is detachably fixed; The movable knife seat (7) is placed in the stationary knife seat (6) and can swing back and forth. It is limited to be located between the stationary knife seat (6) and the trimming blade, and forms a whole that can be synchronously disassembled and assembled with the stationary knife seat (6) and the trimming blade; A movable blade (8) is mounted on the movable blade seat (7) and its outer surface is always kept in contact with the inner surface of the trimming blade middle panel (11) under the action of the elastic member (9); and a plurality of movable blade teeth (81) are arranged at intervals on the movable blade (8); 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 located directly below the limiting unit (52) in any state, so that the connecting rib (13) forms a limit perpendicular to the swinging direction for both ends of the moving blade (8).

10. The cutter head assembly according to claim 9, characterized in that The width W5 of at least one moving blade 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).

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