A cutting head structure for a nasal hair trimmer

Abstract

The utility model relates to a kind of nose hair trimmer's cutter head structure, including relatively rotatable inner cutter and outer cutter, positioning member is equipped between the inner cutter and outer cutter, the positioning member has coaxially arranged outer ring and inner ring, when the outer ring and inner ring of positioning member are fixed or integrated, its outer ring is connected with outer cutter tight fit, inner ring is rotatably connected with inner cutter;When the outer ring and inner ring of positioning member are rotatably connected, its outer ring is connected with outer cutter tight fit, inner ring is connected with inner cutter tight fit.The coaxial positioning effect of the inner cutter and outer cutter of the product is good, thereby effectively avoiding the friction, heat and noise problems caused by poor coaxiality in traditional assembly mode.

Description

Technical Field

[0001] This utility model relates to the field of personal care device technology, specifically to a blade structure for a nose hair trimmer. Background Technology

[0002] As a common personal care tool, nose hair trimmers require the inner blade to rotate at high speed relative to the outer blade to cut nose hairs. In existing technology, the inner and outer blades are typically mounted on separate carriers before being assembled. This assembly method makes it difficult to ensure coaxiality between the two, causing friction between the inner and outer blades during high-speed rotation. This generates significant heat and noise, affecting the user experience and potentially posing safety hazards due to overheating. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art by providing a blade structure for a nose hair trimmer, with good coaxial positioning between the inner and outer blades.

[0004] The technical solution of this utility model is as follows: A blade structure for a nose hair trimmer includes an inner blade and an outer blade that can rotate relative to each other. A positioning member is provided between the inner blade and the outer blade, and the positioning member has an outer ring and an inner ring arranged coaxially.

[0005] When the outer ring and inner ring of the positioning component are fixed or integrated, the outer ring is tightly connected to the outer tool and the inner ring is rotatably connected to the inner tool.

[0006] When the outer and inner rings of the positioning component rotate and engage, the outer ring is tightly fitted with the outer tool and the inner ring is tightly fitted with the inner tool.

[0007] By adopting the above technical solution, the inner and outer tool parts are precisely coaxially positioned and assembled through positioning components, thereby effectively avoiding the friction, heat and noise problems caused by poor coaxiality in traditional assembly methods.

[0008] In the first assembly method, the outer ring of the positioning component is tightly connected to the outer blade, ensuring a stable connection between the outer blade and the outer ring. Simultaneously, the inner ring and the inner blade form a rotational fit, allowing the inner blade to rotate smoothly during shearing, thus improving the coaxiality of the cutter head structure. The inner ring and inner blade form a rotational clearance, while the inner blade and outer blade form a cutting clearance, simultaneously meeting the requirements of a smaller rotational clearance and a slightly larger cutting clearance. The smaller rotational clearance design better ensures the coaxiality of the inner and outer blades; the slightly larger cutting clearance design allows for the smooth entry and effective trimming of nose hairs. If the inner and outer blades directly rotate, a clearance that is too small will hinder the entry of nose hairs into the cutting area, resulting in poor cutting performance; a clearance that is too large will compromise the coaxiality of the inner and outer blades, and nose hairs will easily fall into the clearance, leading to hair accumulation, affecting equipment lifespan, and increasing cleaning difficulty.

[0009] In the second assembly method, the outer and inner rings of the positioning component are rotated together, while the outer ring is tightly fitted to the outer cutting tool and the inner ring is tightly fitted to the inner cutting tool, which further enhances the overall stability of the cutting head and improves the coaxiality of the cutting head structure.

[0010] In summary, this utility model, through its innovative blade structure design, effectively solves the problem of poor coaxiality in existing nose hair trimmer blades, thereby improving the user experience and safety of the product.

[0011] A further feature of this invention is that the positioning element is a bearing structure in which the outer ring and the inner ring rotate in a rotatable manner.

[0012] By adopting the above-mentioned further configuration, the inner and outer cutting tools are modularly installed as a whole using bearings, which can better ensure coaxiality and facilitate subsequent installation of the cutting head structure; and by utilizing the high precision characteristics of the bearings themselves, the smoothness of rotation of the inner and outer cutting tools is further optimized.

[0013] A further feature of this invention is that the positioning element is a bushing structure consisting of an outer ring and an inner ring.

[0014] By adopting the above-mentioned further settings, the connection between the inner and outer cutting tools is made more stable through the design of the bushing structure, while also further enhancing the overall coaxiality of the cutting head and making the production and assembly process simpler and faster.

[0015] A further feature of this invention is that when the inner ring and the inner tool are rotated together, an axial positioning structure is provided between the inner tool and the outer tool.

[0016] By adopting the above-mentioned further settings, through the axial positioning structure, the axial displacement of the inner tool is avoided, and the inner and outer tool components are modularly installed as a whole, which can better ensure coaxiality and facilitate the subsequent installation of the tool head structure.

[0017] A further feature of this invention is that the axial positioning structure includes an upper and lower stepped surface on the outer periphery of the inner tool, and a stop surface on the inner wall of the outer tool. The upper stepped surface of the inner tool is stopped and limited by the stop surface, and the lower stepped surface is stopped and limited by the positioning component, so that the inner tool and the outer tool are axially positioned.

[0018] With the further configuration described above, the upper and lower stepped surfaces of the inner tool abut against the stop surface and positioning element of the outer tool, respectively. This design not only enhances the connection stability between the inner and outer tool pieces but also ensures their axial positioning accuracy. The relative positions of the inner and outer tool pieces remain unchanged, resulting in a stable connection structure that is easy to disassemble.

[0019] A further feature of this invention: the inner tooling includes a tool shaft with an inner blade at the head of the tool shaft; the outer tooling includes a tool sleeve with an outer blade at the head of the tool sleeve; and the positioning element is located between the tail of the tool shaft and the tail of the tool sleeve.

[0020] By adopting the above further settings, the cutting gap between the inner and outer blades on the head is set reasonably, ensuring the cutting effect of nose hairs, while avoiding the problem of nose hairs falling into the gap.

[0021] In particular, when the inner ring of the positioning component rotates with the inner blade, the inner ring and the tail of the cutter shaft form a rotational clearance, while the inner blade at the head of the cutter shaft and the outer blade at the head of the cutter sleeve form a cutting clearance. Because the distance between the head and tail ends of the component is relatively large, it is convenient to design the cutting clearance and rotational clearance to be of different sizes.

[0022] A further feature of this invention is that the tail of the cutter shaft is provided with a transmission shaft, and the outer diameter of the transmission shaft is smaller than that of the cutter shaft to form a stepped structure, and the positioning component is sleeved on the outside of the transmission shaft.

[0023] With the above-mentioned further design, since the outer diameter of the drive shaft is smaller than that of the cutter shaft, it is easier to install the positioning components. After installation, the overall cutter head structure is compact and has a small outer diameter, making it easier to enter the nasal cavity.

[0024] A further feature of this invention is that a power shaft is threaded through the transmission shaft.

[0025] With the above-mentioned further configuration, the driving force can be stably transmitted to the transmission shaft through the power shaft, thereby driving the cutter shaft and inner cutter to rotate, thus realizing the function of trimming nose hairs. Attached Figure Description

[0026] Figure 1 This is a structural diagram of a specific embodiment of the present utility model;

[0027] Figure 2 This is a cross-sectional view of a specific embodiment of the present utility model;

[0028] Figure 3 This is a structural diagram of the outer blade component according to a specific embodiment of the present utility model;

[0029] Figure 4 This is a cross-sectional view of the outer blade of a specific embodiment of the present utility model;

[0030] Figure 5 This is a structural diagram of the inner blade component according to a specific embodiment of the present utility model;

[0031] Figure 6 This is a structural diagram of the positioning component according to a specific embodiment of the present utility model. Detailed Implementation

[0032] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] like Figure 1-6 As shown, the blade structure of a nose hair trimmer according to this utility model includes an inner blade 1 and an outer blade 2 that can rotate relative to each other. A positioning member 3 is provided between the inner blade 1 and the outer blade 2. The positioning member 3 has an outer ring 31 and an inner ring 32 that are coaxially arranged.

[0034] When the outer ring 31 and inner ring 32 of the positioning component 3 are fixed or integrated, the outer ring 31 is tightly connected to the outer tool 2, and the inner ring 32 is rotatably connected to the inner tool 1. The positioning component 3 is a bushing structure in which the outer ring 31 and inner ring 32 are integrated. An axial positioning structure is provided between the inner tool 1 and the outer tool 2. The axial positioning structure includes an upper stepped surface 1A and a lower stepped surface 1B on the outer periphery of the inner tool 1. A stop surface 2A is provided on the inner wall of the outer tool 2. The upper stepped surface 1A of the inner tool 1 is abutted and limited by the stop surface 2A, and the lower stepped surface 1B is abutted and limited by the positioning component 3, so that the inner tool 1 and the outer tool 2 are axially positioned.

[0035] When the outer ring 31 and inner ring 32 of the positioning component 3 are rotated together, the outer ring 31 is tightly connected to the outer cutting tool 2, and the inner ring 32 is tightly connected to the inner cutting tool 1. The positioning component 3 is a bearing structure in which the outer and inner rings rotate together.

[0036] The above-mentioned tight-fit connection prevents relative rotation between the two parts, and fixation is achieved by means such as interference fit.

[0037] Specifically, the inner cutting tool 1 includes a cutting shaft 11, with an inner blade 12 fixedly or integrally provided at the head of the cutting shaft 11. The outer cutting tool 2 includes a cutting sleeve 21, with an outer blade 22 fixedly or integrally provided at the head of the cutting sleeve 21. The positioning member 3 is located between the tail of the cutting shaft 11 and the tail of the cutting sleeve 21. The tail of the cutting shaft 11 is fixedly or integrally provided with a drive shaft 13, and the outer diameter of the drive shaft 13 is smaller than that of the cutting shaft 11, forming a stepped structure. The positioning member 3 is sleeved on the drive shaft 13, and the outer diameter of the cutting shaft 11 is larger than that of the drive shaft 13, forming the lower stepped surface 1B. A power shaft 14 passes through the drive shaft 13, which is connected to the moving tool bracket or directly connected to the output shaft of the drive device. Alternatively, the drive shaft 13 can be connected to the moving tool bracket or the output shaft of the drive device.

[0038] The first type of cutter head assembly: the positioning component 3 adopts a bearing structure. First, the inner ring 32 of the bearing is tightly fitted onto the drive shaft 13, and the blade sleeve 21 of the outer blade 2 is tightly fitted onto the outer ring 31 of the positioning component 3, thus completing the assembly of the inner blade 1 and the outer blade 2 through the positioning component 3; then, the assembled cutter head structure is installed onto the main body of the nose hair trimmer, specifically, the outer blade is mounted on the outer blade housing, and the inner blade is mounted on the moving blade bracket (the power shaft 14 passes through the drive shaft 13 and is connected to the moving blade bracket), thereby completing the assembly of the entire nose hair trimmer cutter head. The assembly process is simple and convenient, improving production efficiency.

[0039] The working principle of the above-mentioned blade head structure is as follows: When the drive device of the trimmer is started, it drives the moving blade bracket to rotate, which in turn drives the transmission shaft 13 to rotate via the power shaft 14, thereby driving the blade shaft 11 to rotate. Since the positioning component 3 adopts a bearing structure, the coaxiality of the inner blade 1 and the outer blade 2 is ensured. The inner blade 12 can rotate stably relative to the outer blade 22 to trim the nose hairs entering the blade head. Throughout the process, the high-precision rotation of the bearings ensures that the inner blade 1 rotates smoothly, effectively reducing noise and heat generation, and ensuring the effect of nose hair trimming.

[0040] The second type of cutter head assembly: The positioning component 3 adopts a bushing structure. First, the drive shaft 13 of the inner cutter 1 is installed into the inner ring 32 of the positioning component 3 to form a rotational fit. The outer ring 31 of the positioning component 3 is tightly connected to the cutter sleeve 21. The upper and lower stepped surfaces of the inner cutter abut against the stop surface of the outer cutter and the positioning component, respectively, to achieve axial positioning of the inner cutter. Then, the entire cutter head structure is installed on the trimmer body, specifically, the outer cutter is installed on the outer cutter shell and the inner cutter is installed on the moving cutter bracket (the power shaft 14 passes through the drive shaft 13 and is connected to the moving cutter bracket), thus completing the assembly of the entire nose hair trimmer cutter head. The assembly process is simple and convenient, improving production efficiency.

[0041] The working principle of the above-mentioned blade head structure is as follows: When the trimmer's drive device is activated, it drives the moving blade bracket to rotate, which in turn drives the transmission shaft 13 to rotate via the power shaft 14, thereby driving the blade shaft 11 to rotate. Due to the role of the positioning component 3, the coaxiality of the inner blade 1 and the outer blade 2 is ensured, and the inner blade 12 rotates stably relative to the outer blade 22 to perform nose hair trimming. During operation, this structure can effectively reduce the friction caused by the misalignment between the inner blade 1 and the outer blade 2, extending the service life of the blade head.

[0042] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "installation" 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 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A blade structure for a nose hair trimmer, comprising an inner blade (1) and an outer blade (2) capable of relative rotation, characterized in that: A positioning element (3) is provided between the inner tool (1) and the outer tool (2), and the positioning element (3) has an outer ring (31) and an inner ring (32) arranged coaxially. When the outer ring (31) and inner ring (32) of the positioning part (3) are fixed or integrated, the outer ring (31) is tightly connected with the outer tool (2), and the inner ring (32) is rotatably connected with the inner tool (1); When the outer ring (31) and inner ring (32) of the positioning part (3) rotate and engage, the outer ring (31) is tightly connected to the outer tool (2), and the inner ring (32) is tightly connected to the inner tool (1).

2. The cutter head structure according to claim 1, characterized in that, The positioning element (3) is a bearing structure in which the outer ring and the inner ring rotate together.

3. The cutter head structure according to claim 1, characterized in that, The positioning element (3) is a bushing structure consisting of an outer ring (31) and an inner ring (32).

4. The cutter head structure according to claim 1 or 3, characterized in that, When the inner ring (32) rotates and engages with the inner tool (1), an axial positioning structure is provided between the inner tool (1) and the outer tool (2).

5. The cutter head structure according to claim 4, characterized in that, The axial positioning structure includes an upper stepped surface (1A) and a lower stepped surface (1B) on the outer periphery of the inner tool (1), and a stop surface (2A) on the inner wall of the outer tool (2). The upper stepped surface (1A) of the inner tool (1) is abutted and limited by the stop surface (2A), and the lower stepped surface (1B) is abutted and limited by the positioning member (3), so that the inner tool (1) and the outer tool (2) form an axial positioning.

6. The cutter head structure according to claim 1, 2, or 3, characterized in that, The inner cutting tool (1) includes a cutting shaft (11) with an inner blade (12) at the head of the cutting shaft (11). The outer cutting tool (2) includes a cutting sleeve (21) with an outer blade (22) at the head of the cutting sleeve (21). The positioning member (3) is located between the tail of the cutting shaft (11) and the tail of the cutting sleeve (21).

7. The cutter head structure according to claim 6, characterized in that, The tail of the cutter shaft (11) is provided with a transmission shaft (13), and the outer diameter of the transmission shaft (13) is smaller than that of the cutter shaft (11) to form a stepped structure. The positioning member (3) is sleeved on the outside of the transmission shaft (13).

8. The cutter head structure according to claim 7, characterized in that: A power shaft (14) is mounted on the drive shaft (13).

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