A knife tooth with a gradual sharp-angle blade and a pruning tool

Abstract

The present invention relates to a blade with a gradual sharp angle and a trimming tool, which is characterized in that a bevel extends from the front end of the blade body to the end of the blade body to form a blade front end and a blade end, the blade front end angle S1 is greater than the blade end angle S2, and the blade angle from the front end of the blade to the blade end is gradually reduced. The beneficial effect of the present invention is that the angle of the front end blade of the blade body is increased, so that the angle of the front end of the blade is close to a right angle, so that the front end angle of the blade of the front end of the blade body can be avoided without affecting the hair separation, and the skin can be pierced by the sharp front end angle of the blade of the front end of the blade body, thereby improving the safety of the trimming tool. At the same time, the blade angle on one side or both sides of the blade body is gradually reduced from the front end of the blade to the end of the blade to form a gradual smooth transition. After the hair enters through the front end of the blade, the closer to the end of the blade, the sharper the angle of the blade, and the higher the cutting sharpness, so that the trimming efficiency and trimming effect of the hair can be effectively guaranteed.

Description

Technical Field

[0001] The invention relates to a knife tooth, and more particularly to a knife tooth with a gradual sharp-angle blade. The knife tooth is mainly used on a trimming tool for trimming hair. Background Art

[0002] In order to facilitate hair trimming, a blade is provided on one or both sides of the blade teeth of the existing trimming tool, and the blade is formed by an acute angle formed between the inclined surface and the bottom working surface of the blade teeth. Figure 1 , Figure 2 As shown in the figure, the blade angles of the root and top of the cutter teeth are consistent, which can facilitate the production and processing of the blade, improve production efficiency, and ensure the trimming effect of the pruning tool. However, during use, the blade at the top of the cutter teeth is very easy to pierce the skin, causing injuries to the user, affecting the safety of the pruning tool. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a blade tooth and a trimming tool with a gradually sharp-angle blade. By increasing the angle of the front end of the blade on the side wall of the blade tooth, the front end of the blade can be effectively prevented from piercing the skin while facilitating the separation and introduction of hair, thereby improving the safety of the trimming tool. Secondly, the angle of the end of the blade is reduced to ensure the trimming efficiency and trimming effect of the hair.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is a tooth with a gradually sharp-angled blade, including a tooth body, and a bevel is provided on one side and / or both sides of the tooth body, and the bevel is combined with the working surface of the tooth body to form a blade with an acute-angled edge. The bevel extends from the front end of the tooth body to the end of the tooth body to form the front end and the end of the blade. The angle S1 at the front end of the blade is greater than the angle S2 at the end of the blade, and the blade angle from the front end of the blade to the end of the blade gradually decreases.

[0005] Preferably, the front end angle S1 of the blade is 70° to 90°.

[0006] Preferably, the blade tip angle S2 is 5° to 70°.

[0007] Preferably, the upper vertex M1 of the inclined surface at the front end of the blade is higher than the upper vertex M2 of the inclined surface at the rear end of the blade, and there is an arc transition between the upper vertex M1 of the inclined surface at the front end of the blade and the upper vertex M2 of the inclined surface at the rear end of the blade.

[0008] Preferably, the acute-angled cutting edge formed at the junction of the working surface of the tooth body and the bevel surface is arc-shaped so that the width W2 of the blade end is greater than the width W1 of the blade front end.

[0009] On the basis of the above technical solution, the applicant also provides a pruning tool, comprising a tool body, characterized in that a plurality of the above-mentioned teeth are arranged on the tool body.

[0010] The beneficial effects of the present invention are:

[0011] 1. Increase the angle of the front blade of the cutter body so that the angle of the front blade is close to a right angle. This can prevent the sharp angle of the front blade of the cutter body from hurting the skin without affecting the hair separation, thereby improving the safety of the trimming tool.

[0012] 2. The blade angle on one or both sides of the blade body is gradually reduced from the front end of the blade to the end of the blade to form a gradual and smooth transition. After the hair enters through the front end of the blade, the closer it is to the end of the blade, the sharper the angle of the blade is, and the higher the cutting sharpness is, which can effectively ensure the trimming efficiency and trimming effect of the hair.

[0013] 3. The blade angle from the front end to the end of the blade gradually becomes smaller to prevent the blade angle from suddenly changing significantly. This can effectively avoid the phenomenon of hair pulling when the tooth body cooperates with other teeth or the difficulty of blade production and processing due to sudden changes in the blade angle, thereby improving the production efficiency of the blade and the trimming efficiency of hair. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Enlarged diagram of the existing pruning tool teeth structure

[0015] Figure 2 This is an enlarged cross-sectional view of the existing pruning tool's teeth

[0016] Figure 3 A three-dimensional structural diagram of a trimming tool according to an embodiment of the present invention

[0017] Figure 4 This is an enlarged front view of a blade tooth with a gradually changing sharp-angle blade according to an embodiment of the present invention.

[0018] Figure 5 This is an enlarged top view of a blade tooth with a gradually changing sharp-angle blade according to an embodiment of the present invention.

[0019] Figure 6 A three-dimensional enlarged view of a blade tooth with a gradually changing sharp-angle blade according to an embodiment of the present invention DETAILED DESCRIPTION

[0020] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0021] like Figure 4-6As shown, the present invention is a tooth with a gradually sharp-angled blade, comprising a tooth body 1, a bevel 21 is provided on one side and / or both sides of the tooth body 1, the bevel 21 is engaged with the working surface of the tooth body 1 to form a blade 2 with an acute-angled edge 22, the bevel 21 extends from the front end of the tooth body 1 to the end of the tooth body 1 to form a blade front end 23 and a blade end 24, the angle S1 of the blade front end 23 is greater than the angle S2 of the blade end 24, and the angle of the blade 2 from the blade front end 23 to the blade end 24 is gradually reduced.

[0022] The angle and width of the blade 2 on the traditional cutter teeth are basically the same. After a long period of careful research and observation by the technical team of the applicant, it was found that the front end of the cutter tooth actually only plays the role of separating the hairs when in use, and the hair trimming is completed by using the blade 2 in a section from the middle of the cutter tooth to the end of the cutter tooth. Based on the above findings, the technical team of the applicant proposed to increase the angle of the front end blade 2 of the cutter tooth body 1 so that the angle S1 of the front end 23 of the blade is close to a right angle, which relatively reduces the sharpness of the blade 2. Without affecting the separation of hairs, it is also possible to avoid the cutting edge 22 of the front end 23 of the cutter tooth body 1 being too sharp and piercing the skin, thereby improving the safety of the trimming tool, especially the trimming tool used for trimming the hair of infants and young children.

[0023] In order to facilitate the production and processing of the blade 2 and ensure the trimming efficiency and trimming effect of hair, the angle of the blade 2 on one side or both sides of the blade body 1 gradually decreases from the blade front end 23 to the blade end 24 to form a gradual and smooth transition, so that the closer the angle of the blade 2 is to the blade end 24, the sharper its angle is. After the hair enters through the blade front end 23, the closer it is to the blade end 24, the sharper the angle of the blade 2 is, and the higher the cutting sharpness is, which can effectively ensure the trimming efficiency and trimming effect of hair; secondly, the angle of the blade 2 from the blade front end 23 to the blade end 24 becomes smaller and smaller in a gradual manner, preventing the angle of the blade 2 from suddenly changing greatly, which can effectively avoid the hair pulling phenomenon when the blade body 1 cooperates with other teeth or the difficulty of producing and processing the blade 2 due to the sudden change of the angle of the blade 2, thereby improving the production efficiency of the blade 2 and the trimming efficiency of hair.

[0024] In order to prevent the blade 2 at the front end of the blade body 1 from piercing the skin, the angle S1 of the front end 23 of the blade is 70° to 90°, preferably 75° to make the front end 23 of the blade closer to a right angle, so that the sharpness of the front end 23 of the blade can be reduced to the greatest extent. When in use, the blade body 1 can not only achieve the separation of hair, but also effectively prevent the front end 23 of the blade on one side or both sides of the blade body 1 from piercing the skin, thereby improving the safety of the trimming tool. As is known to all, the larger the angle of the blade 2, the worse its sharpness. In actual use, the angle S1 of the front end 23 of the blade can also be set to 80°, 85° or 90°, etc., as long as the sharpness of the front end 23 of the blade can be reduced. The specific angle setting can be determined in combination with the actual needs of the blade or user requirements.

[0025] In order to ensure the hair trimming effect of the blade teeth, the angle S2 of the blade end 24 is 5° to 70°, preferably 35°, which is gradually reduced from the angle S1 of the blade front end 23 of 75° to the angle S2 of the blade end 24 of 35°. When the hair enters through the blade front end 23, the angle of the blade 2 gradually decreases, and the sharpness of the blade 2 gradually increases, which can effectively ensure the hair trimming effect of the blade 2. Of course, the angle S2 of the blade end 24 can also be set to 10°, 15° or 20°, etc., but the angle of the angle S2 of the blade end 24 is set to be smaller. When the angle S1 of the blade front end 23 gradually transitions to the angle S2 of the blade end 24, the angle of the blade 2 will change greatly, which correspondingly increases the production difficulty of the blade 2 and is not conducive to the production and processing of the blade 2. In actual use, the angle of the angle S2 of the blade end 24 can also be determined according to the length of the tooth body 1. For example, the longer the length of the tooth body 1, the smaller the angle S2 of the blade end 24 can be set. In this way, while improving the sharpness of the blade 2 and improving the hair trimming efficiency and effect, it can also smoothly change the angle between the angle S1 at the front end 23 of the blade and the angle S2 at the blade end 24, thereby reducing the processing difficulty of the blade 2, improving the production efficiency of the tooth and the blade 2, and reducing the production cost.

[0026] To facilitate the production and processing of the blade 2, the top point M1 of the inclined surface of the front end 23 of the blade is higher than the top point M2 of the inclined surface of the end 24 of the blade, and there is an arc transition between the top point M1 of the inclined surface of the front end 23 of the blade and the top point M2 of the inclined surface of the end 24 of the blade. Since the transition from the front end 23 of the blade to the end 24 of the blade is gradual and gradually reduced, if the top point M2 of the inclined surface of the end 24 of the blade is higher than or equal to the top point M1 of the inclined surface of the front end 23 of the blade, the top point M2 of the inclined surface of the end 24 of the blade may be recessed into the side wall of the tooth body 1, making the structure of the blade 2 more complicated and difficult to produce and process. The top vertex M2 of the inclined surface of the blade end 24 is set at the top vertex M1 of the inclined surface of the blade front end 23. In this way, while ensuring that the angle of the blade 2 gradually decreases to improve the sharpness of the blade 2, the inclined surface 21 of the blade 2 can be located outside the side wall of the tooth body 1, and no concave structure will be generated on the side wall of the tooth body 1. During production, the teeth can be quickly produced through precision machining or integrated stamping and forming technology, thereby improving the production efficiency of the teeth.

[0027] In order to improve the hair trimming comfort of the blade, the sharp-angled edge 22 formed at the junction of the working surface of the blade body 1 and the inclined surface 21 is arc-shaped so that the width W2 of the blade end 24 is greater than the width W1 of the blade front end 23. The edge 22 from the blade front end 23 to the blade end 24 is set as an arc curved outward so that the width W1 of the blade front end 23 is smaller than the width W2 of the blade end 24. When the blade is in the swing trimming process, the hair enters between the blade teeth of the moving blade and the static blade of the trimming tool through the guide at the front end of the blade body 1. If too much hair enters, the hair entering the junction of the two blade teeth will be cut first, and the excess hair will be pushed out by the arc-shaped edge 22 (also called spitting hair), effectively preventing excessive hair from being concentrated and superimposed together, resulting in continuous trimming and causing hair pulling. While improving the hair trimming efficiency and trimming effect, it avoids skin pain and improves the comfort of using the trimming tool, especially the hair trimming tool for infants and young children. Of course, the cutting edge 22 can also be set to be a straight line or an inwardly concave arc. The inwardly concave arc-shaped cutting edge 22 can play a role in catching hair and prevent hair from slipping out between the two blade teeth. Such a cutting edge 22 of the cutting edge has a high requirement for the swing torque of the trimming tool. If the swing torque is small, it is very easy to cause excessive hair trimming and continuous cutting, resulting in the phenomenon of knife jumping (knife jumping refers to the gap between the working surfaces of the moving knife and the static knife, which makes it impossible to trim hair and causes hair to be pulled). The straight cutting edge 22 has a weaker hair-spitting effect than the arc-shaped cutting edge, resulting in hair pulling. Therefore, the implementation of this embodiment is the preferred implementation.

[0028] On the basis of the above-mentioned technical solution of blade teeth, the applicant also proposes a technical solution of a pruning tool, such as Figure 3 As shown, the trimming tool comprises a tool body 3, and a plurality of the aforementioned blade teeth are arranged on the tool body 3. The trimming tool can be a moving blade or a stationary blade of a hair clipper or a moving blade or a stationary blade of a side push clipper of a razor.

[0029] Special note: Hair pulling means that the hair is between the blades of the static knife and the dynamic knife of the trimming tool. Due to some internal or external factors such as the direction and angle of the hair or the trimming tool, the hair cannot be cut off in time, causing the hair to be pulled and causing pain to the skin.

[0030] 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 tooth having a gradually changing acute angle blade, comprising a tooth body (1), characterized in that A bevel (21) is provided on one side and / or both sides of the tooth body (1), the bevel (21) being joined with a working surface of the tooth body (1) to form a blade (2) with an acute-angled cutting edge (22), the bevel (21) extending from the front end of the tooth body (1) to the rear end of the tooth body (1) to form a blade front end (23) and a blade rear end (24), an angle S1 of the blade front end (23) being greater than an angle S2 of the blade rear end (24), and an angle of the blade (2) from the blade front end (23) to the blade rear end (24) gradually decreasing.

2. The blade having a gradually changing sharp-angle blade according to claim 1, characterized in that The included angle S1 of the front end of the blade (23) is 70° to 90°.

3. The blade having a gradually changing sharp-angle blade according to claim 1, characterized in that The included angle S2 of the blade end (24) is 5° to 70°.

4. The blade having a gradually changing sharp-angle blade according to claim 1, characterized in that The top vertex M1 of the inclined surface (21) at the front end (23) of the blade is higher than the top vertex M2 of the inclined surface (21) at the rear end (24) of the blade, and there is an arc transition between the top vertex M1 of the inclined surface (21) at the front end (23) of the blade and the top vertex M2 of the inclined surface (21) at the rear end (24) of the blade.

5. The blade tooth with a gradually sharp-angled blade according to claim 1, characterized in that The acute-angled cutting edge (22) formed at the junction of the working surface of the blade body (1) and the inclined surface (21) is arc-shaped so that the width W2 of the blade end (24) is greater than the width W1 of the blade front end (23).

6. A trimming tool, comprising a tool body (3), characterized in that A plurality of cutting teeth according to any one of claims 1 to 5 are arranged on the cutting tool body (3).

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