Cutter head assembly and hair trimmer

Abstract

The embodiment of the utility model discloses a tool bit assembly and a hair trimmer, the tool bit assembly comprises a long beard tool bit and two short beard tool bits, the long beard tool bit comprises a long-strip flat-plate-shaped fixed knife, a plurality of shearing teeth are arranged on the two sides, in the first direction, of the fixed knife at intervals in the second direction, and a shearing groove is formed between every two adjacent shearing teeth; the two short beard tool bits are arranged on the two opposite sides of the long beard tool bit respectively, the two short beard tool bits and the long beard tool bit are arranged at intervals, a hair inlet gap extending in the second direction is formed between the tail end of the shearing tooth and the long beard tool bit, and the shearing groove is communicated with the hair inlet gap so that the to-be-sheared object can enter the shearing groove through the hair inlet gap. According to the cutter head assembly, the cutting groove is communicated with the hair inlet gap, so that long beards can smoothly enter the cutting groove through the hair inlet gap, meanwhile, hair can enter the cutting groove in the thickness direction of the fixed cutter, the hair entering amount is increased, and the cutting efficiency of the hair trimmer is improved.

Description

Technical Field

[0001] The present application relates to the field of hair trimming, and in particular to a cutter head assembly and a hair trimmer. Background Art

[0002] As people's demands for more comfortable and efficient hair trimming have increased, multi-head hair trimmers have emerged, such as multi-head shavers, which provide a more thorough shave. Multi-head shavers typically consist of a long-beard head and short-beard heads flanking the long-beard head. In existing technology, the fixed blades of the long-beard head are relatively wide. To meet the requirements of a compact shaver that is comfortable to hold and store, the clearance between the short-beard and long-beard heads becomes smaller, making it difficult for longer beards to enter the long-beard head for cutting, resulting in low cutting efficiency.

[0003] The above content is only used to assist in understanding the technical solution of the utility model and does not constitute an admission that the above content is prior art. Utility Model Content

[0004] In view of the above problems, the present invention proposes a cutter head assembly, which aims to solve the technical problem of low shearing efficiency caused by the small hair feed gap between the short-hair cutter head and the long-hair cutter head.

[0005] To achieve the above objectives, the cutter head assembly proposed by the present invention includes:

[0006] A beard growing razor head, comprising a long flat plate-shaped fixed blade, wherein a plurality of shearing teeth are provided on both sides of the fixed blade in a first direction at intervals along a second direction, and a shearing groove is formed between two adjacent shearing teeth; and

[0007] Two short-beard blade heads, the two short-beard blade heads are respectively arranged on opposite sides of the long-beard blade head and are respectively spaced apart from the long-beard blade head, an approach gap extending along the second direction is formed between the ends of the shearing teeth and the long-beard blade head, the shearing groove is connected to the approach gap, so that the object to be sheared enters the shearing groove through the approach gap;

[0008] The first direction is a width direction of the fixed knife, and the second direction is a length direction of the fixed knife.

[0009] In one embodiment, the long-beard blade head further includes a fixed blade bracket, which is fixedly connected to the bottom side of the fixed blade, and the side panel of the fixed blade bracket facing the short-beard blade head is located on the side of the bottom wall of the shearing groove away from the short-beard blade head, and the advance gap is also formed between the side panel of the fixed blade bracket facing the short-beard blade head and the short-beard blade head.

[0010] In one embodiment, the bottom wall of the shear groove includes two arc surfaces and a connecting surface connected between the two arc surfaces, and the two arc surfaces are respectively connected to the two opposite side walls of the shear groove.

[0011] In one embodiment, the width of the shearing groove is gradually increased from inside to outside in the third direction; the third direction is the thickness direction of the fixed knife.

[0012] In one embodiment, at least parts of the two opposite side walls of the shear groove are inclined away from each other from the inside to the outside in the third direction.

[0013] In one embodiment, the side wall of the shear groove has a first section connected to the bottom wall of the shear groove and a second section connected to the first section on the side away from the bottom wall. The first section is inclined from the inside to the outside and away from each other along the third direction so that the second section bulges outward relative to the first section.

[0014] In one embodiment, the inner edges of the two opposite side walls of the shearing groove in the third direction respectively form shearing edges that cooperate with the movable knife for shearing, and the two shearing edges are arranged in parallel.

[0015] In one embodiment, the top wall of the shearing tooth smoothly transitions from the root to the tip and is tilted downward.

[0016] In one embodiment, the short beard razor head includes a fixed blade net, which is arranged side by side with the fixed blade. The top of the fixed blade net is arc-shaped, and the highest point of the fixed blade net is higher than or flush with the highest point of the fixed blade.

[0017] The present invention further provides a hair trimmer, comprising the above-mentioned cutter head assembly and a driving device, wherein the output shaft of the driving device is connected to the cutter head assembly.

[0018] The present invention's blade assembly utilizes two short-beard blades spaced apart on opposite sides of a long-beard blade, creating a clearance between the ends of the cutting teeth and the long-beard blade. Furthermore, the shear groove communicates with the clearance, allowing longer beards to pass smoothly through the clearance. Furthermore, hair can also enter the groove in the thickness direction of the fixed blade, increasing the amount of hair that can enter and improving the cutting efficiency of the hair trimmer. Furthermore, while the width of the short-beard blades and the blade assembly remain unchanged, the elongated, flat-plate-shaped fixed blade can be configured to have a smaller width. This increases the clearance between the short-beard blades and the long-beard blades, increasing the amount of hair that can enter and improving the cutting efficiency of the hair trimmer. Furthermore, the fixed blades of conventional long-beard blades are typically configured in a convex or concave shape, which increases the size of the fixed blades and, consequently, the volume of the hair trimmer. By configuring the fixed blade in a long, flat shape, the present invention reduces the size of the fixed blade while maintaining a certain width, thereby reducing the volume of the hair trimmer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic structural diagram of an embodiment of a cutter head assembly of the present invention is shown;

[0021] Figure 2 This is an exploded view of an embodiment of a cutter head assembly of the present invention;

[0022] Figure 3 for Figure 1 Cross-sectional view at PP in the middle;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 A schematic diagram of a fixed blade of a cutter head assembly of the present invention;

[0025] Figure 6 A schematic diagram of the fixed blade of the cutter head assembly of the present invention from another angle;

[0026] Description of Figure Numbers:

[0027] Label name Label name Label name 100 Cutting head assembly 110 Long beard blade 111 Fixed knife 112 shear teeth 1120 Shear groove 1121 bottom wall 1122 sidewall 1123 Top wall 1124 Arc surface 1125 Connection surface 1126 Paragraph 1 1127 Second paragraph 1128 roots 1129 End 113 Fixed knife bracket 1131 Side panels 114 First end cap 120 Short beard blade 121 Fixed knife net 122 Second end cap 130 Advance Gap 115 Cut Edge

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0032] The present invention provides a cutter head assembly 100 for a hair trimmer.

[0033] In the embodiment of this utility model, please refer to Figures 1 to 6 The cutter head assembly 100 includes a long beard cutter head 110 and two short beard cutter heads 120. The long beard cutter head 110 includes a fixed cutter 111 in the shape of a long flat plate. The fixed cutter 111 is provided with a plurality of shearing teeth 112 on both sides of the first direction along the second direction, and a shearing groove 1120 is formed between two adjacent shearing teeth 112; the two short beard cutter heads 120 are respectively arranged on opposite sides of the long beard cutter head 110, and are arranged on opposite sides of the long beard cutter head 110, and are respectively spaced apart from the long beard cutter head 110. An advance gap 130 extending along the second direction is formed between the end 1129 of the shearing teeth 112 and the long beard cutter head 110, and the shearing groove 1120 is connected to the advance gap 130 so that the object to be cut enters the shearing groove 1120 through the advance gap 130.

[0034] In this embodiment, the fixed blade 111 has a first direction, a second direction, and a third direction. The first direction is the width direction of the fixed blade 111, the second direction is the length direction of the fixed blade 111, and the third direction is the thickness direction of the fixed blade 111. The present invention forms an approach gap 130 between the distal ends 1129 of the shearing teeth 112 and the long-beard blade head 110 by disposing two short-beard blade heads 120 at intervals on opposite sides of the long-beard blade head 110. The approach gap 130 is in the shape of an elongated strip extending along the second direction. There is no other component blocking the distance between the shearing teeth 112 and the short-beard blade head 120, and the shearing groove 1120 is connected to the approach gap 130. This increases the width of the approach gap 130, allowing longer beards to pass through the approach gap 130 and enter the shearing groove 1120 smoothly. At the same time, hair can also enter the shearing groove 1120 in the thickness direction of the fixed blade 111, thereby increasing the amount of hair that enters and improving the cutting efficiency of the hair trimmer. Secondly, while the width of the short-beard blade head 120 and the width of the blade head assembly 100 remain unchanged, the elongated, flat-plate-shaped fixed blade 111 can be configured to have a smaller width. This increases the entry gap 130 between the short-beard blade head 120 and the long-beard blade head 110, increasing the amount of hair entering and improving the cutting efficiency of the hair trimmer. In the prior art, the fixed blade 111 of the long-beard blade head 110 is typically configured in a convex or concave shape, which increases the size of the fixed blade 111 and, consequently, the volume of the hair trimmer. By configuring the fixed blade 111 in an elongated, flat-plate shape, the present invention reduces the size of the fixed blade 111 while maintaining a certain width, thereby reducing the volume of the hair trimmer.

[0035] Furthermore, in one embodiment, the long-beard blade head 110 also includes a fixed blade bracket 113, which is fixedly connected to the bottom side of the fixed blade 111, and the side panel 1131 of the fixed blade bracket 113 facing the short-beard blade head 120 is located on the side of the bottom wall 1121 of the shearing groove 1120 away from the short-beard blade head 120, and an advance gap 130 is also formed between the side panel 1131 of the fixed blade bracket 113 facing the short-beard blade head 120 and the short-beard blade head 120.

[0036] Because the side plate 1131 of the fixed blade holder 113 facing the short-beard cutting head 120 is farther away from the short-beard cutting head 120 than the distal end 1129 of the shearing teeth 112, a hair entry gap 130 is formed between the side plate 1131 of the fixed blade holder 113 facing the short-beard cutting head 120 and the short-beard cutting head 120, thereby increasing the space in the hair entry gap 130. This allows more hair to enter the shearing groove 1120 through the hair entry gap 130, thereby increasing the amount of hair that can enter. The larger hair entry gap 130 allows more and longer hairs to enter the shearing groove 1120 smoothly, reducing hair blockage in the hair entry gap 130 and further improving cutting efficiency. Furthermore, the deeper and larger hair entry gap 130 formed between the side plate 1131 of the fixed blade holder 113 facing the short-beard cutting head 120 and the short-beard cutting head 120 allows hairs of different lengths to enter the hair entry gap 130, effectively processing a wide range of hair lengths.

[0037] Furthermore, in one embodiment, referring to Figure 1 、 Figure 2 and Figure 4 The long-beard cutter head 110 also includes two first end covers 114, which are respectively installed at the two ends of the fixed knife 111 in the second direction; the short-beard cutter head 120 is arranged side by side with the long-beard cutter head 110 along the first direction, and the short-beard cutter head 120 includes a second end cover 122 corresponding to the first end cover 114 and arranged at an interval.

[0038] In this embodiment, the first end cap 114 is shaped like a cube, and the second end cap 122 is shaped like a fan-shaped column. The top surfaces and edges of the first end cap 114 and the second end cap 122 are all rounded. The rounded top surface and edges are smoother, reducing scratching and irritation when the end caps come into contact with the skin during hair trimming. Users will feel more comfortable during use, and it is particularly friendly to sensitive skin. The smooth rounded top surface and edges reduce the possibility of hair getting stuck or tangled during trimming, ensuring that the cutter head assembly 100 slides freely along the facial contours, providing a smoother hair trimming experience and a cleaner hair trimming effect, thereby improving the operating efficiency of the cutter head assembly 100. Secondly, by having the first end cap 114 and the second end cap 122 adjacent to each other in the first direction and spaced apart, a certain distance is ensured between the short-beard cutter head 120 and the long-beard cutter head 110, increasing the width of the hair entry gap 130, thereby increasing the amount of hair entering and improving cutting efficiency.

[0039] Furthermore, in one embodiment, referring to Figure 5 and Figure 6The width of the shear groove 1120 is configured to gradually increase from the inside outward in the third direction. This gradual increase in the width of the shear groove 1120 makes it easier for hair to enter the groove, while also combing the hair. The wider entrance captures more hair, especially beards of different orientations and lengths, thereby increasing the amount of hair entering. This gradually increasing width allows hair to enter the groove 1120 from multiple angles along the thickness of the fixed blade 111, improving the shaver's ability to capture beards with different growth directions. Secondly, the shear groove 1120 is narrow at the bottom, effectively retaining hair within the groove 1120 and preventing it from escaping during the cutting process. This arrangement ensures that hair entering the groove 1120 is smoothly sheared, improving cutting efficiency. Because the hair is retained within the groove 1120, the shearing effect is cleaner and more thorough, reducing the amount of uncut hair remaining and improving the overall shaving effect.

[0040] Specifically, the two opposite side walls 1122 of the shearing groove 1120 respectively form shearing edges 115 at the inner edges in the third direction for cooperating with the movable knife for shearing, and the two shearing edges 115 are arranged in parallel.

[0041] In this embodiment, the two parallel shearing edges 115 provide symmetrical friction and resistance to the hair during the shearing process, ensuring that the lateral force exerted on the hair during the shearing process is evenly distributed, so that the hair remains in a fixed position, reducing the possibility of the hair falling out of the shearing groove 1120 due to lateral sliding, and improving the shearing efficiency of the hair trimmer 110.

[0042] Furthermore, the bottom wall 1121 of the shearing groove 1120 includes two arc surfaces 1124 and a connecting surface 1125 connected between the two arc surfaces 1124 . The two arc surfaces 1124 are respectively connected to the two opposite side walls 1122 of the shearing groove 1120 .

[0043] In this embodiment, the arcuate surface 1124 is tilted in the third direction, from the inside outward and away from the opening of the shear groove 1120. The connecting surface 1125 is located between and connected to the two arcuate surfaces 1124, increasing the width of the bottom wall 1121 of the shear groove 1120 at the top surface to guide more hair into the shear groove 1120. The connection between the arcuate surface 1124 and the side wall 1122 of the shear groove 1120 makes the corner of the bottom wall 1121 more rounded, reducing the sharp edge when the long-beard cutter head 110 contacts the skin, reducing skin irritation and providing a more comfortable hair trimming experience. The smooth corner design reduces scratches and potential scratches on the skin caused by the cutter head assembly 100 during use, thereby increasing the safety of the cutter head assembly 100.

[0044] Furthermore, in one embodiment, at least a portion of the two opposite side walls 1122 of the shear groove 1120 are inclined away from each other from the inside to the outside in the third direction.

[0045] In this embodiment, when the opposing side walls 1122 of the shearing groove 1120 are all inclined in a third direction, facing away from each other from the inside outward, they form an inverted trapezoidal structure that is wider at the top and narrower at the bottom. This makes the shearing teeth 112 resemble the teeth of a comb, eliminating the need for a separate comb structure. This simplifies the structure of the cutter head assembly 100 and increases the width of the entry gap 130. This design effectively combs hair, guiding it smoothly into the shearing groove 1120 and reducing the risk of hair getting stuck. When the side walls 1122 are partially inclined, forming convex portions, these convex portions provide a larger contact area with the skin, enhancing the comfort of hair cutting.

[0046] Specifically, in an embodiment of the present invention, the side wall 1122 of the shear groove 1120 has a first section 1126 and a second section 1127 connected to the bottom wall 1121 of the shear groove 1120, the second section 1127 is connected to the side of the first section 1126 away from the bottom wall 1121, and the first section 1126 is inclined from the inside to the outside and away from each other along the third direction, so that the second section 1127 bulges outward relative to the first section 1126.

[0047] The first section 1126 is tilted so that the second section 1127 protrudes outward relative to the first section 1126. This arrangement increases the area of the top wall 1123 at the distal end 1129 of the shearing teeth 112. The width of the top wall 1123 at the distal end 1129 is greater than the width of the top wall 1123 at the root 1128. This increases the contact area between the skin and the shearing teeth 112, more evenly distributing the pressure of the blade assembly 100 when in contact with the skin, reducing the pressure of the shearing teeth 112 on the skin and improving user comfort. The first section 1126 forms a trapezoidal structure that is narrow at the top and wide at the bottom, similar to the teeth of a comb. This eliminates the need for a separate comb structure, making the structure of the blade assembly 100 simpler and increasing the width of the entry gap 130.

[0048] Furthermore, in one embodiment, the top wall 1123 of the shearing tooth 112 smoothly transitions from the root 1128 to the tip 1129 thereof and is tilted downward.

[0049] In the prior art, the ends 1129 of the cutting teeth 112 are typically provided with upward-curved protective protrusions. These protrusions prevent the fixed blade 111 from closely fitting the skin surface, creating a certain gap. Due to the lack of close fit, beards or hair cannot be effectively pushed into the cutting gap of the fixed blade 111, making it difficult for the long-beard cutter head 110 to effectively cut long beards, thereby affecting the cutting effect. Furthermore, the upward-curved protective protrusions also reduce the amount of hair entering the cutting area, resulting in a decrease in the amount of hair cut each time and reduced cutting efficiency. These problems result in unsatisfactory cutting effects and a poor user experience when using existing hair trimmers, especially when dealing with longer hair. In this embodiment, the thickness of the ends 1129 of the cutting teeth 112 is less than that of the roots 1128. The top wall 1123 of the cutting teeth 112 smoothly transitions from the roots 1128 to the ends 1129 and is tilted downward, allowing the cutting teeth 112 to more closely fit the skin surface. This close fit can reduce the gap between the fixed blade 111 and the skin, ensuring that the hair can be effectively pushed into the shearing gap, thereby improving the accuracy and efficiency of shearing.

[0050] It should be noted that all edges and corners of the shearing teeth 112 are rounded, which reduces scratching and irritation to the skin during use and improves the comfort and safety of the trimming process.

[0051] Furthermore, the short-shaving razor head 120 includes a fixed blade net 121, which is arranged side by side with the fixed blade 111. The top of the fixed blade net 121 is arc-shaped, and the highest point of the fixed blade net 121 is higher than or flush with the highest point of the fixed blade 111. The highest point of the fixed blade net 121 is higher than or flush with the highest point of the fixed blade 111. This arrangement can more effectively conform to the skin, especially at the edges of facial contours, improving the precision and effectiveness of hair trimming. The closer fit of the fixed blade net 121 to the skin allows the shaver to more accurately capture and cut each hair. Even fine hairs at the edges of facial contours can be effectively trimmed, improving the overall effect and quality of trimming.

[0052] This utility model also provides a hair trimmer comprising a drive device and a cutter head assembly 100. The specific structure of the cutter head assembly 100 is similar to the above-described embodiments. Since this hair trimmer utilizes all the technical solutions of all of the above-described embodiments, it at least possesses all the beneficial effects brought about by the technical solutions of the above-described embodiments, and therefore will not be further elaborated here. The output shaft of the drive device is connected to the cutter head assembly 100. The hair trimmer may specifically be a shaver, hair clipper, trimmer, etc., without specific limitation herein.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cutter head assembly, characterized in that: include: A beard growing razor head, comprising a long flat plate-shaped fixed blade, wherein a plurality of shearing teeth are provided on both sides of the fixed blade in a first direction at intervals along a second direction, and a shearing groove is formed between two adjacent shearing teeth; and Two short-beard blade heads, the two short-beard blade heads are respectively arranged on opposite sides of the long-beard blade head and are respectively spaced apart from the long-beard blade head, an approach gap extending along the second direction is formed between the ends of the shearing teeth and the short-beard blade heads, the shearing groove is connected to the approach gap, so that the object to be sheared enters the shearing groove through the approach gap; The first direction is a width direction of the fixed knife, and the second direction is a length direction of the fixed knife.

2. The cutter head assembly according to claim 1, wherein: The long-beard razor head also includes a fixed blade bracket, which is fixedly connected to the bottom side of the fixed blade, and the side plate of the fixed blade bracket facing the short-beard razor head is located on the side of the bottom wall of the shearing groove away from the short-beard razor head, and the entry gap is also formed between the side plate of the fixed blade bracket facing the short-beard razor head and the short-beard razor head.

3. The cutter head assembly according to any one of claims 1 to 2, wherein: The bottom wall of the shearing groove includes two arc surfaces and a connecting surface connected between the two arc surfaces, and the two arc surfaces are respectively connected to the two opposite side walls of the shearing groove.

4. The cutter head assembly according to any one of claims 1 to 2, wherein: The width of the shearing groove is gradually increased from the inside to the outside in the third direction; the third direction is the thickness direction of the fixed knife.

5. The cutter head assembly according to claim 4, wherein: At least parts of the opposite side walls of the shear groove are arranged to be inclined away from each other from the inside to the outside in the third direction.

6. The cutter head assembly according to claim 5, wherein: The side wall of the shear groove has a first section connected to the bottom wall of the shear groove and a second section connected to the first section on the side away from the bottom wall. The first section is inclined from the inside to the outside and away from each other along the third direction so that the second section bulges outward relative to the first section.

7. The cutter head assembly according to claim 4, wherein: The inner edges of the two opposite side walls of the shearing groove in the third direction respectively form shearing edges that cooperate with the movable knife for shearing, and the two shearing edges are arranged in parallel.

8. The cutter head assembly according to any one of claims 1 to 2, wherein: The top wall of the shearing tooth smoothly transitions from the root to the tip and is tilted downward.

9. The cutter head assembly according to any one of claims 1 to 2, wherein: The short beard razor head includes a fixed blade net, which is arranged side by side with the fixed blade. The top of the fixed blade net is arc-shaped, and the highest point of the fixed blade net is higher than or flush with the highest point of the fixed blade.

10. A hair trimmer, characterized in that: It comprises a cutter head assembly and a driving device according to any one of claims 1 to 9, wherein the output shaft of the driving device is connected to the cutter head assembly.

Images