Cutter head structure capable of cutting smoothly and hair trimmer

Abstract

The utility model relates to the technical field of hair trimmer, and discloses a tool bit structure capable of cutting smoothly and a hair trimmer, the tool bit structure capable of cutting smoothly comprises a fixed knife, a movable knife and an inlay piece, the inlay piece is embedded in one side of the fixed knife close to the movable knife, the movable knife is movably abutted against the inlay piece, one side of the inlay piece close to the movable knife is provided with a groove, and the inlay piece is arranged in the groove. And the contact area between the insert and the moving blade is reduced through the groove. The device is simple in structure and low in production cost; the contact area between the insert and the movable cutter is reduced through the groove, so that the area for forming negative pressure is reduced, the adsorption force between the insert and the movable cutter is reduced, the driving force needed when the movable cutter swings is reduced, the movable cutter swings more smoothly relative to the fixed cutter, and the power consumption is reduced; the inlay sheet is made of materials with low friction coefficient, such as ceramic, so that the friction force between the moving cutter and the inlay sheet is reduced, and the shearing smoothness of the moving cutter is further improved.

Description

Technical Field

[0001] This utility model relates to the field of hair trimmer technology, and more specifically, to a blade structure and hair trimmer that provides smooth cutting. Background Technology

[0002] Some existing hair trimmer products, such as electric clippers, have a blade structure that includes a fixed blade and a moving blade that reciprocates relative to the fixed blade. The moving blade is abutted against the fixed blade by elastic elements such as springs and spring sheets. When in use, the motor inside the hair trimmer drives the moving blade to swing back and forth, and the hair is trimmed by the cooperation of the fixed blade and the moving blade.

[0003] In some existing hair trimmers, the contact area between the moving and fixed blades is relatively smooth. When two smooth surfaces come into contact, a negative pressure phenomenon is created. This negative pressure, caused by atmospheric pressure, makes it difficult for the moving and fixed blades to move relative to each other. This increases the adhesion between the moving and fixed blades, making it difficult for the motor inside the hair trimmer to drive the moving blade to swing relative to the fixed blade. This affects the smoothness of the moving blade's swing and increases the driving force required by the motor to swing the blade, thus increasing power consumption. In addition, the moving blade will rub against the fixed blade during swing, resulting in excessive heat generation. This requires frequent application of lubricant to the contact area between the moving and fixed blades for lubrication and cooling, making it inconvenient to use. Utility Model Content

[0004] To address at least one of the aforementioned problems, this invention provides a smooth-cutting blade structure suitable for mounting on a hair trimmer. The smooth-cutting blade structure includes a fixed blade, a moving blade, and an insert plate. The insert plate is embedded in the fixed blade near the moving blade, and the moving blade movably abuts against the insert plate. A groove is provided on the side of the insert plate near the moving blade to reduce the contact area with the moving blade. This invention's smooth-cutting blade structure is simple in structure and has low production cost. The groove reduces the contact area with the moving blade, thereby reducing the area of ​​negative pressure and the adhesion between the insert plate and the moving blade. This reduces the driving force required for the moving blade to swing, resulting in smoother swinging of the moving blade compared to the fixed blade and reduced power consumption. The insert plate is made of a low-friction material such as ceramic, further reducing friction between the moving blade and the insert plate and improving the smoothness of the moving blade's cutting action.

[0005] Optionally, the groove is inclined.

[0006] Optionally, the groove includes a first groove group inclined at a first angle and a second groove group inclined at a second angle, the fixed blade has a central axis, and the first groove group and the second groove group are symmetrical or nearly symmetrical about the central axis.

[0007] Optionally, the first groove group includes a plurality of parallel first grooves, and the second groove group includes a plurality of parallel second grooves.

[0008] Optionally, the first groove forms a first angle with the central axis, and the second groove forms a second angle with the central axis. The size of the first angle is the same as or close to the size of the second angle, and the first angle is 35°-55°.

[0009] Optionally, the inlay is made of ceramic, and the fixed blade is made of stainless steel, aluminum alloy, or plastic.

[0010] Optionally, the fixed blade is provided with a mounting groove for mounting the insert piece, the fixed blade is provided with a first side surface on the side near the moving blade, and the insert piece is provided with a second side surface on the side near the moving blade, wherein the first side surface and the second side surface are flush or nearly flush.

[0011] Optionally, hot melt adhesive is provided between the insert and the fixed blade, the insert and the fixed blade are bonded by the hot melt adhesive, and the fixed blade is provided with a filling groove for filling the hot melt adhesive in an annular shape.

[0012] Optionally, the fixed blade is inlaid with an inlaid blade and has fixed blade teeth. The inlaid blade has inlaid blade teeth corresponding to the fixed blade teeth. The moving blade is provided with a first abutting part and a second abutting part. A clearance groove is formed between the first abutting part and the second abutting part. The first abutting part movably abuts against the inlaid blade, and the second abutting part movably abuts against the inlaid piece. The inlaid blade is made of ceramic material.

[0013] Compared to existing technologies, the shearing head structure of this invention is simple in structure and low in production cost. The insert plate reduces the contact area with the moving blade through grooves, thereby reducing the area where negative pressure is formed, and further reducing the adsorption force between the insert plate and the moving blade. This reduces the driving force required for the moving blade to swing, making the moving blade swing more smoothly than the fixed blade and reducing power consumption. The insert plate is made of a low-friction material such as ceramic, which reduces the friction between the moving blade and the insert plate, further improving the smoothness of the moving blade during shearing. The insert blade is a high-hardness, low-friction blade. During use, the high hardness of the insert blade facilitates the cutting of hair and improves the sharpness during trimming. The low friction coefficient of the insert blade reduces heat generation, resulting in a low temperature rise of both the fixed and moving blades during trimming. The insert teeth on the insert blade ensure the sharpness during trimming, allowing the fixed blade to be made of a lighter material, making the fixed blade lighter overall and easier to hold.

[0014] In addition, this utility model also provides a hair trimmer, including the above-mentioned smooth-cutting blade structure. This hair trimmer also has the beneficial effects of the above-mentioned smooth-cutting blade structure, which will not be described in detail here. Attached Figure Description

[0015] Figure 1 This is a perspective view of the blade head structure of the present invention, which provides smooth cutting.

[0016] Figure 2 This is an exploded view of the blade head structure for smooth shearing according to this utility model;

[0017] Figure 3 This is a schematic diagram of the central axis of the blade head structure for smooth shearing according to this utility model;

[0018] Figure 4 for Figure 3 Enlarged view of section C;

[0019] Figure 5 This is a schematic diagram of the blade head structure of the present invention, which allows for smooth shearing during the swinging of the moving blade.

[0020] Figure 6 for Figure 5 Enlarged view of section D in the middle;

[0021] Figure 7 This is a cross-sectional view of the blade head structure of this utility model that provides smooth cutting.

[0022] Figure 8 for Figure 7 Enlarged view of section E in the middle;

[0023] The component names corresponding to the various reference numerals in the figure are as follows: 1 is the fixed blade, 101 is the mounting groove, 102 is the first side surface, 103 is the filling groove, 104 is the fixed blade tooth, 2 is the moving blade, 201 is the first abutment part, 202 is the second abutment part, 203 is the clearance groove, 3 is the inlay piece, 301 is the groove, 3011 is the first groove, 3012 is the second groove, 3013 is the edge part, 3014 is the contact point, 302 is the second side surface, 4 is the inlaid blade, 401 is the inlaid blade tooth, L is the central axis, A is the first included angle, and B is the second included angle. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0027] See Figures 1-8 This utility model provides a smooth-cutting blade structure suitable for mounting on a hair clipper. In this embodiment, the hair clipper is an electric clipper. The smooth-cutting blade structure includes a fixed blade 1, a moving blade 2, and an insert plate 3. The insert plate 3 is embedded in the fixed blade 1 near the moving blade 2. The moving blade 2 and the insert plate 3 are in movable contact. The insert plate 3 has a groove 301 on the side near the moving blade 2. The groove 301 reduces the contact area between the insert plate 3 and the moving blade 2, thereby reducing the area of ​​negative pressure and reducing the adsorption effect. Furthermore, the groove 301 also reduces the contact area between the insert plate 3 and the moving blade 2. The friction area of ​​blade 2 reduces frictional heat generation, eliminating the need for frequent lubrication of the contact points between the moving and fixed blades. This invention features a smooth-cutting blade structure that is simple in design and low in production cost. The insert plate reduces the contact area with the moving blade through grooves, thereby reducing the area of ​​negative pressure and the adhesion force between the insert plate and the moving blade. This reduces the driving force required for the moving blade to swing, resulting in smoother swinging of the moving blade relative to the fixed blade and reduced power consumption. The insert plate is made of a low-friction coefficient material such as ceramic, further reducing friction between the moving blade and the insert plate and improving the smoothness of the moving blade's cutting.

[0028] See Figure 5 and Figure 6The groove 301 is inclined. When the moving blade 2 swings to one side, from left to right, it contacts the edge 3013 of one of the grooves 301, forming a contact point 3014. A contact surface 3015 is formed on the side of the edge 3013 away from the groove 301. As the moving blade 2 continues to swing, it makes surface contact with the contact surface 3015. During the swinging process of the moving blade, by inclining the groove 301, the contact area between the moving blade 2 and the insert 3 transitions from point contact to surface contact, resulting in a smoother transition. The edge 3013 of the groove 301 provides less resistance to the moving blade 2, leading to smoother shearing. If the groove 301 extends vertically, then... The contact between the moving blade 2 and the edge of one of the grooves transitions from line contact to surface contact. Line contact provides greater resistance to the moving blade than point contact, affecting the smoothness of the blade's swing. Furthermore, the inclined groove 301 facilitates the entry of air from the groove 301 or outside air into the contact surface between the moving blade 2 and the insert 3 during the shearing process, reducing the area of ​​negative pressure formation and thus improving the smoothness of the blade's swing. If the groove 301 is set to extend laterally, the contact area between the moving blade 2 and the insert 3 will always be in contact during shearing, which is not conducive to the entry of air from the groove 301 or outside air into the contact surface between the moving blade 2 and the insert 3, making it difficult to reduce the area of ​​negative pressure formation and affecting the smoothness of the blade's swing.

[0029] See Figures 1-4 The groove 301 includes a first groove group inclined at a first angle and a second groove group inclined at a second angle. The fixed blade 1 has a central axis L. The first groove group and the second groove group are symmetrical or nearly symmetrical about the central axis L. The symmetry between the first groove group and the second groove group makes the distribution of friction force points when the moving blade 2 reciprocates more symmetrical, thus improving the smoothness of sliding. The first groove group includes multiple parallel first grooves 3011, and the second groove group includes multiple parallel second grooves 3012. The multiple grooves further reduce the contact area between the moving blade 2 and the insert 3. The first groove 3011 forms a first included angle A with the central axis L, and the second groove 3012 forms a second included angle B with the central axis L. The size of the first included angle A is the same as or close to the size of the second included angle B. The first included angle A is 35°-55°, which is a moderate angle setting, so that the moving blade 2 slides smoothly. In this embodiment, both the first included angle A and the second included angle B are 45°.

[0030] See Figure 1 , Figure 2 , Figure 7 and Figure 8The insert 3 is made of ceramic, which has high hardness and low coefficient of friction. This results in low heat generation when the insert 3 rubs against the moving blade 2, reducing lubrication requirements and eliminating the need for frequent lubrication. The insert 3 can be made of traditional ceramic materials such as zirconium oxide and alumina, or newer ceramic materials such as cubic boron nitride. The fixed blade 1 is made of stainless steel, aluminum alloy, or plastic, or other lighter materials can be used to make the entire fixed blade 1 lighter, facilitating handheld operation, reducing the burden on the hand, and improving the user experience. The fixed blade 1 has a mounting groove 101 for installing the insert 3, which is embedded within the mounting groove 101. The fixed blade 1 has a first side surface 102 on the side closest to the moving blade 2, and the insert 3 has a second side surface 302 on the side closest to the moving blade 2. The first side surface 102 and the second side surface 302 are flush or nearly flush. This prevents the insert 3 from protruding too much or being recessed into the first side surface 103 of the fixed blade 1, avoiding interference with the moving blade 2 and ensuring smooth reciprocating movement of the moving blade 2.

[0031] See Figure 1 and Figure 2 Hot melt adhesive is applied between the insert 3 and the fixed blade 1, bonding them together. The fixed blade 1 has a ring-shaped filling groove 103 for filling the hot melt adhesive, ensuring a secure bond. The area where the hot melt adhesive is applied to the insert 3 is heated using an external hot air blower or similar tool until the adhesive reaches its melting point. Then, the insert 3 is removed from the fixed blade 1 using a suction cup or similar tool. Residual hot melt adhesive is cleaned off, new hot melt adhesive is applied, and a new insert 3 is installed for continued use. This facilitates replacement of the insert 3 if it breaks or is damaged, making maintenance convenient. The hot melt adhesive can be made of polyethylene. Ester-based hot melt adhesives, polyamide-based hot melt adhesives, or other hot melt adhesives capable of bonding ceramics; polyester-based hot melt adhesives possess excellent electrical insulation and good bonding strength, as well as good impact resistance, water resistance, cold resistance, media resistance, and elasticity. They exhibit good adhesion to various materials, including metals and ceramics; polyamide-based hot melt adhesives possess excellent heat resistance, cold resistance, oil resistance, and chemical resistance. They are odorless, colorless, and can cure quickly, making them suitable for bonding various metallic and non-metallic materials; the melting point of the hot melt adhesive can be selected from 80℃ to 150℃. The melting point of the hot melt adhesive is higher than that of the fixed blade 1 to prevent damage to the fixed blade 1 during heating.

[0032] See Figure 1 , Figure 2 , Figure 7 and Figure 8The fixed blade 1 has an embedded inlaid blade 4, and the fixed blade 1 has a fixed blade tooth 104. The inlaid blade 4 has an inlaid blade tooth 401 corresponding to the fixed blade tooth 104. The inlaid blade tooth 301 can cooperate with the moving blade 2 to cut hair. The moving blade 2 has a first abutting part 201 and a second abutting part 202. A clearance groove 203 is formed between the first abutting part 201 and the second abutting part 202, so that the part of the moving blade 2 with the clearance groove 203 will not come into contact with the fixed blade. During use, the moving blade 2 mainly abuts against the inlaid blade 3 and the inlaid piece 4. The frictional resistance is small and the heat generation is low when it swings. The first abutting part 201 abuts against the inlaid blade 4, and the second abutting part 202 abuts against the inlaid piece 3. The inlaid blade 4 is made of ceramic material. The inlaid blade 4 is a high-hardness, low-friction blade. During use, the high hardness of the inlaid blade 4 is to facilitate cutting hair and improve the sharpness during trimming. The low friction coefficient of the inlaid blade 4 is to reduce hair. The heat generated during trimming keeps the temperature rise of the fixed blade 1 and moving blade 2 low. The embedded teeth 401 on the embedded blade 4 ensure sharpness during trimming, allowing the fixed blade 1 to be made of a lighter material, making it lighter overall and easier to hold. The fixed blade 1 can be made of aluminum alloy, stainless steel, or plastic. Plastic materials have a higher melting point than hot melt adhesive; for example, plastics with a melting point above 170℃ are used to prevent the hot melt adhesive from melting and damaging the fixed blade 1, ensuring reliable use. The heating temperatures of the fixed blade 1 during trimming are as follows: When the fixed blade 1 is made of steel, the heating temperature is generally below 39℃; when the fixed blade 1 is made of aluminum, the heating temperature is generally below 35℃; when the fixed blade 1 is made of 925 silver, the heating temperature is generally below 32℃. The hot melt adhesive will not melt due to the heat generated by the fixed blade 1 during trimming, ensuring a firm bond between the fixed blade 1 and the embedded blade 3 during use, guaranteeing reliable operation.

[0033] The shearing head structure of this utility model is simple in structure and low in production cost. The insert plate reduces the contact area with the moving blade through grooves, thereby reducing the area where negative pressure is formed, and thus reducing the adsorption force between the insert plate and the moving blade. This reduces the driving force required for the moving blade to swing, making the moving blade swing more smoothly than the fixed blade and reducing power consumption. The insert plate is made of a low-friction material such as ceramic, which reduces the friction between the moving blade and the insert plate, further improving the smoothness of the moving blade during shearing. The insert blade is a high-hardness, low-friction blade. During use, the high hardness of the insert blade facilitates the cutting of hair and improves the sharpness during trimming. The low friction coefficient of the insert blade reduces heat generation, resulting in a low temperature rise of both the fixed and moving blades during trimming. The insert teeth on the insert blade ensure the sharpness during trimming, allowing the fixed blade to be made of a lighter material, making the fixed blade lighter overall and easier to hold.

[0034] In addition, this utility model also provides a hair trimmer, including the above-mentioned smooth-cutting blade structure. This hair trimmer also has the beneficial effects of the above-mentioned smooth-cutting blade structure, which will not be described in detail here.

[0035] In the description of this disclosure, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0038] In this disclosure, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first feature or in indirect contact with the first feature through an intermediate medium.

[0039] It should be noted that when a component is described as being "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is described as being "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A shear head structure for smooth cutting, characterized by, It includes a fixed blade (1), a movable blade (2), and an insert (3). The insert (3) is embedded in the fixed blade (1) on the side near the movable blade (2). The movable blade (2) and the insert (3) are in contact. The insert (3) has a groove (301) on the side near the movable blade (2). The insert (3) reduces the contact area with the movable blade (2) through the groove (301).

2. The shear gliding head structure according to claim 1, wherein The groove (301) is inclined.

3. The shear gliding head structure according to claim 1, wherein The groove (301) includes a first groove group inclined at a first angle and a second groove group inclined at a second angle. The fixed blade (1) has a central axis (L). The first groove group and the second groove group are symmetrical or nearly symmetrical about the central axis (L).

4. The shear gliding head structure according to claim 3, wherein The first groove group includes a plurality of parallel first grooves (3011), and the second groove group includes a plurality of parallel second grooves (3012).

5. The shear gliding head structure according to claim 4, wherein The first groove (3011) forms a first included angle (A) with the central axis (L), and the second groove (3012) forms a second included angle (B) with the central axis (L). The size of the first included angle (A) is the same as or close to the size of the second included angle (B), and the first included angle (A) is 35°-55°.

6. The shear gliding blade head structure of claim 1, wherein, The inlay piece (3) is made of ceramic, and the fixed blade (1) is made of stainless steel, aluminum alloy or plastic.

7. The shear gliding head structure according to claim 1, wherein The fixed blade (1) is provided with a mounting groove (101) for mounting the insert (3). The fixed blade (1) is provided with a first side surface (102) on the side near the moving blade (2), and the insert (3) is provided with a second side surface (302) on the side near the moving blade (2). The first side surface (102) and the second side surface (302) are flush or nearly flush.

8. The shear gliding blade head structure of claim 1, wherein, Hot melt adhesive is provided between the inlay piece (3) and the fixed blade (1), and the inlay piece (3) and the fixed blade (1) are bonded together by the hot melt adhesive. The fixed blade (1) is provided with a filling groove (103) for filling the hot melt adhesive in an annular shape.

9. The shearing-smooth cutting head structure according to any one of claims 1-8, characterized in that, The fixed blade (1) is inlaid with an inlaid blade (4), the fixed blade (1) is provided with a fixed blade tooth (104), the inlaid blade (4) is provided with an inlaid blade tooth (401) corresponding to the fixed blade tooth (104), the moving blade (2) is provided with a first abutting part (201) and a second abutting part (202), a clearance groove (203) is formed between the first abutting part (201) and the second abutting part (202), the first abutting part (201) is in movable contact with the inlaid blade (4), the second abutting part (202) is in movable contact with the inlaid piece (3), and the inlaid blade (4) is made of ceramic material.

10. A hair trimmer characterized by Includes the shearing head structure as described in any one of claims 1-9.

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