Hollow stationary knife, knife head structure and hair trimmer

Abstract

The utility model relates to the field of hair trimmers, and discloses a hollow stationary knife, a knife head structure and a hair trimmer, the hollow stationary knife comprises a stationary knife body, a hollow part is arranged in the stationary knife body, and the hollow part is filled with cooling liquid. The stationary knife body is provided with the hollow part filled with the cooling liquid, the cooling liquid can efficiently absorb heat generated by friction between the movable knife and the stationary knife, and the temperature of the stationary knife is remarkably reduced; thermal fatigue of materials is reduced through efficient cooling, the aging process of the fixed cutter is delayed, and the durability of the cutter head is improved; by reducing the temperature rise of the fixed cutter, the scalding risk caused by high temperature is effectively avoided, and more comfortable use experience is provided; the hollow structure of the stationary knife base reduces the overall mass of the stationary knife, and improves the operation flexibility of the trimmer.

Description

TECHNICAL FIELD

[0001] The utility model relates to hair trimmer technical field, specifically, hollow fixed knife, cutter head structure and hair trimmer. BACKGROUND

[0002] The fixed knife of hair trimmer generally adopts solid design. In operation, the fixed knife and the moving knife work cooperatively to complete the cutting task of hair through moving back and forth. However, the interaction will generate friction, resulting in significant temperature rise of the fixed knife. If the temperature of the fixed knife is too high, not only there is the risk of scalding the skin, but also the fixed knife may be accelerated to age, shortening its service life. SUMMARY

[0003] To solve at least one aspect of the above problems, the utility model first provides a hollow fixed knife, which comprises a fixed knife body, a hollow part is arranged inside the fixed knife body, and the hollow part is filled with cooling liquid.

[0004] Optionally, the fixed knife body is provided with a through hole, the hollow part is communicated with the outside through the through hole, and the through hole is provided with a sealing plug.

[0005] Optionally, the sealing plug is detachably connected with the through hole.

[0006] Optionally, the through hole is arranged on the left side surface and / or the right side surface of the fixed knife body.

[0007] Optionally, the fixed knife body is a metal piece, and the sealing plug is a rubber piece.

[0008] Optionally, the fixed knife body comprises a first metal sheet and a second metal sheet, the first metal sheet is sealingly connected with the second metal sheet and forms the hollow part.

[0009] Optionally, the first metal sheet and the second metal sheet are sealingly connected with each other through a welding process after being formed through stamping.

[0010] Optionally, the front end of the first metal sheet is provided with a plurality of first teeth arranged in an array, the front end of the second metal sheet is provided with a plurality of second teeth arranged in an array, and the edges of the first teeth and the edges of the second teeth are sealingly connected.

[0011] The hollow fixed knife in the utility model, the hollow part filled with cooling liquid is arranged in the fixed knife body, the cooling liquid can efficiently absorb the heat generated by the friction between the moving knife and the fixed knife, and the temperature of the fixed knife is obviously reduced; the efficient cooling reduces the thermal fatigue of the material, delays the aging process of the fixed knife, and improves the durability of the knife head; by reducing the temperature rise of the fixed knife, the risk of burns caused by high temperature is effectively avoided, and more comfortable use experience is provided; the hollow structure of the fixed knife reduces the overall quality of the fixed knife, and improves the operation flexibility of the trimmer.

[0012] In addition, the utility model provides a knife head structure, including moving knife and hollow fixed knife as described above, moving knife and fixed knife reciprocating movement connection.

[0013] The knife head structure of the utility model has the same advantages as the hollow fixed knife described above with respect to the prior art, and details are not repeated here.

[0014] In addition, the utility model provides a hair trimmer, including hollow fixed knife as described above.

[0015] The hair trimmer of the utility model has the same advantages as the hollow fixed knife described above with respect to the prior art, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure diagram of the hollow fixed knife of the embodiment of the utility model;

[0017] Figure 2 It is the partial structure diagram of the hollow fixed knife of the embodiment of the utility model;

[0018] Figure 3 It is the sectional view of the hollow fixed knife of the embodiment of the utility model;

[0019] Figure 4 It is the structure diagram of the knife head structure of the embodiment of the utility model.

[0020] BRIEF DESCRIPTION OF DRAWINGS:

[0021] 1, fixed knife body; 11, hollow part; 12, through hole; 13, first metal sheet; 131, first tooth; 14, second metal sheet; 141, second tooth; 2, sealing plug; 3, moving knife. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings.

[0023] In the description of the utility model, it is understood that the terms "upper", "lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship when the product is normally used.

[0024] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included at least one feature. The drawings of the embodiments of the utility model are provided with a coordinate axis X, wherein the positive direction of the X axis represents the left direction, and the reverse direction of the X axis represents the right direction.

[0025] The utility model discloses a hollow fixed knife, combining Figure 1 , Figure 2 , Figure 3 It is shown that the fixed knife body 1 is internally provided with a hollow part 11, and the hollow part 11 is filled with cooling liquid.

[0026] Among them, the fixed knife body 1 is made of material with excellent heat conduction performance, such as stainless steel, aluminum alloy or other alloy materials with high strength and heat dissipation performance; the hollow part 11 can be formed inside the fixed knife body 1 through precision machining process, and at the same time of ensuring the strength of the fixed knife, realizing lightweight and accommodating cooling liquid function; the cavity sealing property is ensured through high-precision machining and packaging technology, preventing cooling liquid leakage; the cooling liquid selects liquid with good heat conduction performance, strong thermal stability and environmental protection, such as silicone oil, glycol-based cooling liquid or nano heat conduction liquid; the filling ratio of the cooling liquid is appropriate to ensure that the liquid still maintains good performance after thermal expansion or long-term use.

[0027] The hollow fixed knife in the embodiment sets the hollow part 11 filled with cooling liquid in the fixed knife body 1, and the cooling liquid can efficiently absorb the heat generated by the friction between the moving knife 3 and the fixed knife, significantly reducing the temperature of the fixed knife; the efficient cooling reduces the thermal fatigue of the material, delays the aging process of the fixed knife, and improves the durability of the knife head; by reducing the temperature rise of the fixed knife, the risk of burns caused by high temperature is effectively avoided, and a more comfortable use experience is provided; the hollow structure of the fixed knife body reduces the overall quality of the fixed knife, improves the operation flexibility of the trimmer.

[0028] Optionally, combining Figure 1 , Figure 2 It is shown that the fixed knife body 1 is provided with a through hole 12, the hollow part 11 is communicated with the outside through the through hole 12, and the through hole 12 is provided with a sealing plug 2.

[0029] The through hole 12 is arranged at a hidden position of the fixed knife body 1, such as a side edge or a bottom, which does not affect the normal function of the fixed knife and is convenient for processing and later maintenance; the through hole 12 can be circular or other shapes suitable for the installation of the sealing plug 2, the hole diameter is matched with the sealing plug 2 to ensure the sealing performance; the sealing plug 2 is made of high sealing material, such as silicone rubber, heat-resistant plastic or metal sealing components, which has good temperature resistance and anti-leakage performance; through the through hole 12, the cooling liquid in the hollow part 11 can be supplemented or replaced to ensure the long-term effective operation of the cooling system.

[0030] Optionally, as shown in Figure 1 , Figure 2 , the sealing plug 2 is detachably connected with the through hole 12.

[0031] The sealing plug 2 is made of flexible sealing material, such as silicone or rubber, which is pressed into the through hole 12 through interference fit and relies on friction and elasticity to achieve tight sealing and can be easily detached; the outer wall of the sealing plug 2 can also be designed as a threaded structure matched with the threads on the inner wall of the through hole 12 to achieve firm detachable connection through screwing; through detachable connection, the user can quickly complete the supplement, replacement and internal cleaning of the cooling liquid, greatly improving the maintenance efficiency.

[0032] Optionally, as shown in Figure 1 , Figure 2 , the through hole 12 is arranged on the left side and / or right side of the fixed knife body 1. The through hole 12 is arranged on the left side and / or right side of the fixed knife body 1, avoiding the contact area and reciprocating track of the moving knife 3 and the fixed knife, ensuring that it does not affect the normal operation of the trimmer, and the user can quickly add cooling liquid without disassembling the trimmer.

[0033] Optionally, the fixed knife body 1 is a metal piece, and the sealing plug 2 is a rubber piece. The fixed knife body 1 is made of metal material with good heat conduction performance and high strength, such as stainless steel, aluminum alloy or other lightweight metal alloy, which can quickly transfer the heat generated by friction to the cooling liquid in the hollow part 11, thereby accelerating the heat dissipation speed; the sealing plug 2 is made of rubber material with good elasticity, high temperature resistance and good corrosion resistance, such as silicone rubber or fluororubber, which has good sealing performance and can effectively prevent the leakage of cooling liquid, and provides sufficient flexibility and operation convenience during disassembly and installation.

[0034] Optionally, as shown in Figure 3 , the fixed knife body 1 includes a first metal sheet 13 and a second metal sheet 14, and the first metal sheet 13 is sealingly connected with the second metal sheet 14 to form the hollow part 11.

[0035] The first metal sheet 13 and the second metal sheet 14 are both made of high-thermal-conductivity material, such as stainless steel or aluminum alloy, to improve the heat conduction and heat dissipation performance; the material thickness of the first metal sheet 13 and the second metal sheet 14 is optimized to ensure the strength and durability and reduce the weight to improve the operation flexibility of the trimmer; before being connected, the inner surfaces of the two metal sheets can be coated with an anticorrosive coating to protect the metal from corrosion by the cooling liquid, and the overall structure is simple.

[0036] Optionally, the first metal sheet 13 and the second metal sheet 14 are connected to each other by a welding process after being formed by stamping.

[0037] The first metal sheet 13 is formed into the cutting surface of the fixed knife by a stamping process, and the required hollow cavity profile is also processed at the same time, the stamping process ensures the accuracy of the cutting edge and the flatness of the joint with the second metal sheet 14; the second metal sheet 14 is formed into a cover matched with the first metal sheet 13 by a stamping process, the shape and profile of the second metal sheet 14 are consistent with the structure of the hollow cavity to ensure that the two are closely fitted during subsequent welding; the welding ensures the sealing between the first metal sheet 13 and the second metal sheet 14, the combination of stamping and welding process is suitable for mass production, which reduces the production cost and shortens the manufacturing cycle.

[0038] Optionally, as shown in Figure 1 , Figure 2 , Figure 3 , the front end of the first metal sheet 13 is provided with a plurality of first teeth 131 arranged in an array, and the front end of the second metal sheet 14 is provided with a plurality of second teeth 141 arranged in an array, and the edges of the first teeth 131 and the edges of the second teeth 141 are connected in a sealed manner.

[0039] The first metal sheet 13 is provided with a plurality of first teeth 131 arranged in an array at the front end, the size, shape and spacing of the first teeth 131 are designed to meet the cutting performance requirements, such as sawtooth or triangular teeth; the second metal sheet 14 is provided with second teeth 141 corresponding in shape and arrangement to the first teeth 131 to ensure that the two can be accurately aligned; the edges of the first teeth 131 and the second teeth 141 are connected by a sealing process to form an overall cutting structure, while ensuring the sealing of the front end of the hollow cavity; through the sealed connection of the first teeth 131 and the second teeth 141, the fixed knife forms an integrated tooth structure as a whole, and the cutting is more accurate and efficient.

[0040] Another embodiment of the utility model provides a tool bit structure, which, as shown in Figure 4 , comprises a moving knife 3 and a hollow fixed knife as described above, and the moving knife 3 is connected to the fixed knife in a reciprocating manner.

[0041] The cutter head structure in the embodiment sets the fixed cutter body 1 with the hollow part 11 filled with cooling liquid, the cooling liquid can efficiently absorb the heat generated by the friction between the moving cutter 3 and the fixed cutter, significantly reduces the temperature of the fixed cutter, efficiently cools down, reduces the thermal fatigue of the material, delays the aging process of the fixed cutter, improves the durability of the cutter head, reduces the temperature rise of the fixed cutter, effectively avoids the risk of burns caused by high temperature, provides a more comfortable use experience, and the hollow structure of the fixed cutter reduces the overall quality of the fixed cutter, improves the operation flexibility of the trimmer.

[0042] Another embodiment of the utility model provides a hair trimmer, including the hollow fixed cutter as described above.

[0043] The hair trimmer in the embodiment sets the fixed cutter body 1 with the hollow part 11 filled with cooling liquid, the cooling liquid can efficiently absorb the heat generated by the friction between the moving cutter 3 and the fixed cutter, significantly reduces the temperature of the fixed cutter, efficiently cools down, reduces the thermal fatigue of the material, delays the aging process of the fixed cutter, improves the durability of the cutter head, reduces the temperature rise of the fixed cutter, effectively avoids the risk of burns caused by high temperature, provides a more comfortable use experience, and the hollow structure of the fixed cutter reduces the overall quality of the fixed cutter, improves the operation flexibility of the trimmer.

[0044] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A hollow fixed blade, characterized in that, The device includes a fixed blade body (1), which has a hollow part (11) inside. The hollow part (11) is filled with coolant. The fixed blade body (1) has a through hole (12). The hollow part (11) is connected to the outside through the through hole (12). A sealing plug (2) is installed in the through hole (12). The sealing plug (2) is detachably connected to the through hole (12).

2. The hollow fixed blade according to claim 1, characterized in that, The through hole (12) is provided on the left side and / or right side of the fixed blade body (1).

3. The hollow fixed blade according to claim 1, characterized in that, The fixed blade body (1) is a metal part, and the sealing plug (2) is a rubber part.

4. The hollow fixed blade according to any one of claims 1-3, characterized in that, The fixed blade body (1) includes a first metal sheet (13) and a second metal sheet (14), the first metal sheet (13) and the second metal sheet (14) are sealed together to form the hollow part (11).

5. The hollow fixed blade according to claim 4, characterized in that, The first metal sheet (13) and the second metal sheet (14) are stamped and then sealed together by welding.

6. The hollow fixed blade according to claim 4, characterized in that, The front end of the first metal sheet (13) is provided with a plurality of first teeth (131) arranged in a row, and the front end of the second metal sheet (14) is provided with a plurality of second teeth (141) arranged in a row. The edges of the first teeth (131) and the edges of the second teeth (141) are sealed together.

7. A cutting head structure, characterized in that, It includes a movable blade (3) and a hollow fixed blade as described in any one of claims 1-6, wherein the movable blade (3) is reciprocally connected to the fixed blade.

8. A hair trimmer, characterized in that, Includes the hollow fixed blade as described in any one of claims 1-6.

Images