Tool bit structure and hair trimmer

Abstract

The utility model relates to the technical field of hair trimmers, and discloses a tool bit structure and a hair trimmer, the tool bit structure comprises a blade mounting rack and a gland which are connected with each other, the blade mounting rack is provided with a back side, the back side is provided with a back knife, and the back knife is abutted between the blade mounting rack and the gland for limiting. The tool bit structure and the hair trimmer are simple in structure and low in production cost; when the blade mounting frame and the gland are assembled, the back knife can be fixed, the back knife does not need to be fixed through additional parts such as aluminum sheets, the assembly steps are few, the assembly cost is reduced, and the production efficiency is improved; and the back knife is stably mounted and is not easy to loosen, and the use experience is good.

Description

Technical Field

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

[0002] Some hair trimmer products, such as razors, are equipped with trimming blades for shaving hair in areas such as sideburns or around the nose. These trimming blades are typically mounted at the rear (or back) of the blade holder and are also known as back blades.

[0003] Some existing blade head structures with back blades require the back blade to be fixedly installed on the blade mounting bracket using parts such as aluminum sheets. This structure is relatively complex, involves many assembly steps, and results in higher production costs. In addition, the aluminum sheets are prone to deformation and loosening during use, which can cause the back blade to loosen and affect normal use. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model provides a blade head structure suitable for mounting on a hair trimmer. The blade head structure includes a connected blade mounting bracket and a pressure cap. The blade mounting bracket has a back side, on which a back blade is disposed. The back blade abuts against the blade mounting bracket and the pressure cap for positioning. This utility model's blade head structure and hair trimmer are simple in structure and have low production costs. Simultaneously, the blade mounting bracket and pressure cap are assembled to fix the back blade, eliminating the need for additional aluminum sheets or other parts for fixation. This reduces assembly steps, lowers assembly costs, and improves production efficiency. The back blade is securely mounted, preventing loosening and providing a superior user experience.

[0005] Optionally, the back blade is provided with a cutting edge, and the pressure cap is provided with a relief groove corresponding to the cutting edge, with the cutting edge exposed in the relief groove.

[0006] Optionally, a first limiting part, a second limiting part, and a third limiting part are provided between the blade mounting bracket and the pressure cap. The first limiting part is used to limit the back blade in a first direction, the second limiting part is used to limit the back blade in a second direction, and the third limiting part is used to limit the back blade in a third direction. The first direction, the second direction, and the third direction are three mutually perpendicular directions in three-dimensional space.

[0007] Optionally, the first limiting part includes a first limiting surface and a second limiting surface disposed on the blade mounting bracket, and the back blade is placed between the first limiting surface and the second limiting surface.

[0008] Optionally, the second limiting part includes a third limiting surface and a fourth limiting surface disposed on the blade mounting bracket, and the back blade is placed between the third limiting surface and the fourth limiting surface.

[0009] Optionally, the back blade includes a blade body and a mounting block connected to the blade body, the mounting block abutting between the third limiting surface and the fourth limiting surface for limiting.

[0010] Optionally, the third limiting part includes a fifth limiting surface disposed on the blade mounting bracket and a sixth limiting surface disposed on the pressure cap, with the back blade positioned between the fifth limiting surface and the sixth limiting surface.

[0011] Optionally, the pressure cap is provided with a buckle, and the blade mounting bracket is provided with a slot corresponding to the buckle. When the blade mounting bracket and the pressure cap are assembled, the buckle and the slot engage.

[0012] Optionally, the pressure cap is provided with a positioning protrusion, and the blade mounting bracket is provided with a positioning groove corresponding to the positioning protrusion. When the blade mounting bracket and the pressure cap are assembled, the positioning protrusion is engaged in the positioning groove for positioning.

[0013] Optionally, the blade mounting bracket is provided with a protrusion, the positioning groove is provided on the protrusion, and the back blade abuts against the protrusion for limiting position.

[0014] Optionally, the blade mounting bracket is provided with a plurality of main blades, which abut against the blade mounting bracket and the pressure cap for limiting their position.

[0015] Compared to existing technologies, the blade head structure in this invention is simple in structure and has low production costs. The blade mounting bracket and the pressure cap are assembled simultaneously to fix the back blade, eliminating the need for additional aluminum sheets or other parts for fixation. This reduces assembly steps, lowers assembly costs, and improves production efficiency. The back blade is securely installed, preventing loosening and providing a superior user experience. The mounting block abuts against the third and fourth limiting surfaces for positioning, thereby limiting the back blade's position; the structural design is reasonable. The pressure cap is equipped with a latch, and the blade mounting bracket is equipped with a latch... The corresponding slots, gland, and blade mounting bracket are engaged via a snap-fit ​​mechanism, resulting in a simple structure. During assembly, the positioning protrusion engages with the positioning groove for positioning, preventing relative displacement between the blade mounting bracket and gland after assembly and ensuring stable back blade installation. The positioning groove on the protrusion positions the positioning protrusion and also limits the back blade, further enhancing the stability of the back blade installation. The assembly of the blade mounting bracket and gland simultaneously fixes the main blade and back blade, simplifying the assembly process, improving assembly efficiency, and thus reducing production costs.

[0016] In addition, this utility model also provides a hair trimmer, including the above-mentioned blade head structure. This hair trimmer also has the same beneficial effects as the above-mentioned blade head structure, which will not be described in detail here. Attached Figure Description

[0017] Figure 1 This is a perspective view of the blade structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the bottom of the cutter head structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the back side of the cutter head structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the first limiting surface of the cutter head structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the second limiting surface of the cutter head structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the blade head structure cap of this utility model;

[0023] Figure 7 This is a schematic diagram of the positioning groove of the cutter head structure of this utility model;

[0024] Figure 8 This is a schematic diagram of the back blade of the present invention.

[0025] The component names corresponding to the various labels in the figure are as follows: 1 is the blade mounting bracket, 101 is the back side, 103 is the slot, 104 is the positioning slot, 105 is the protrusion, 1051 is the abutment part, 2 is the pressure cover, 201 is the clearance slot, 202 is the buckle, 203 is the positioning protrusion, 3 is the back blade, 301 is the blade edge, 31 is the blade body, 32 is the mounting block, 41 is the first limiting surface, 42 is the second limiting surface, 43 is the third limiting surface, 44 is the fourth limiting surface, 45 is the fifth limiting surface, 46 is the sixth limiting surface, and 5 is the main blade. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See Figures 1-8 This utility model provides a blade head structure suitable for mounting on manual razors and other hair trimmers. The blade head structure includes a connected blade mounting bracket 1 and a pressure cap 2. The blade mounting bracket 1 has a back side 101, on which a back blade 3 is mounted. The back blade 3 abuts against the blade mounting bracket 1 and the pressure cap 2 for limiting its position. After being limited, the back blade 3 is not easily displaced, allowing the user to shave hair in areas such as sideburns or near the nose using the back blade 3. It should be noted that if the back blade 3 is not completely fixed due to production or assembly errors in the actual product, resulting in a small displacement of the back blade, and the displacement is within the normal use range, it should also be considered as falling within the protection scope of this utility model. The blade head structure and hair trimmer of this utility model have a simple structure and low production cost. The blade mounting bracket and the pressure cap are assembled simultaneously to fix the back blade, eliminating the need for additional aluminum sheets or other parts for fixing the back blade. This reduces assembly steps, lowers assembly costs, improves production efficiency, and makes the product more aesthetically pleasing and integrated. The back blade is securely mounted, not easily loosened, and provides a good user experience.

[0030] See Figure 2 , Figure 6 and Figure 8 The back blade 3 is equipped with a blade 301, and the pressure cap 2 is equipped with a relief groove 201 corresponding to the blade 301. The blade 301 is exposed in the relief groove 201 so that the user can shave hair using the blade 301. A first limiting part, a second limiting part, and a third limiting part are provided between the blade mounting bracket 1 and the pressure cap 2. The first limiting part is used to limit the back blade 3 in a first direction, the second limiting part is used to limit the back blade 3 in a second direction, and the third limiting part is used to limit the back blade 3 in a third direction, so that the back blade 3 is not easily displaced in the first direction, the second direction, and the third direction, and the back blade 3 is securely installed; see reference. Figure 3 The first direction, the second direction, and the third direction are three mutually perpendicular directions in three-dimensional space; the first direction is the length direction of the back blade 3, i.e., the X-axis direction; the second direction is the height direction of the back blade 3, i.e., the Z-axis direction; and the third direction is the thickness direction of the back blade 3, i.e., the Y-axis direction.

[0031] See Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8The first limiting part includes a first limiting surface 41 and a second limiting surface 42 disposed on the blade mounting bracket 1. The back blade 3 is placed between the first limiting surface 41 and the second limiting surface 42 to limit the back blade 3 in a first direction. The second limiting part includes a third limiting surface 43 and a fourth limiting surface 44 disposed on the blade mounting bracket 1. The back blade 3 is placed between the third limiting surface 43 and the fourth limiting surface 44 to limit the back blade 3 in a second direction. The back blade 3 includes a blade body 31 and a mounting block 32 connected to the blade body 31. The cutting edge 301 is disposed on the blade body 31. The blade body 31 and the mounting block 32 are fixed by integral connection or welding. The mounting block 32 abuts against the third limiting surface 43 and the fourth limiting surface 44. The limiting surfaces 44 limit the movement of the mounting block 32, thereby limiting the movement of the back blade 3. The structure is reasonably designed. When installing the back blade 3, the mounting block 32 is installed on the blade mounting bracket 1, and then the pressure cover 2 is assembled with the blade mounting bracket 1. The longitudinal section of the mounting block 32 is "n" shaped. The mounting block 32 includes a first plate 321, a second plate 322, and a third plate 323 integrally connected between the first plate 321 and the second plate 322. The first plate 321 abuts against the third limiting surface 43 for limiting, and the second plate 322 abuts against the fourth limiting surface 44 for limiting. After limiting, the mounting block 32 is not easy to move, thereby making the back blade 3 not easy to move, and the back blade 3 is installed stably.

[0032] See Figures 2-6 The third limiting part includes a fifth limiting surface 45 disposed on the blade mounting bracket 1 and a sixth limiting surface 46 disposed on the pressure cover 2. The back blade 3 is placed between the fifth limiting surface 45 and the sixth limiting surface 46 to limit the back blade 3 in a third direction. Each limiting surface can be a plane or a curved surface. In this embodiment, each limiting surface is a plane, which has a simple structure and is more stable when it comes into contact.

[0033] See Figure 2 , Figure 6 and Figure 7 The pressure cap 2 is provided with a buckle 202, and the blade mounting bracket 1 is provided with a corresponding slot 103. When the blade mounting bracket 1 and the pressure cap 2 are assembled, the buckle 202 and the slot 103 are engaged. The pressure cap 2 and the blade mounting bracket 1 are engaged through a snap-fit ​​mechanism, which is simple in structure and easy to assemble. The pressure cap 2 and the blade mounting bracket 1 can also be connected by means such as ultrasonic welding, glue, or tight fitting. The pressure cap 2 is provided with a positioning protrusion 203, and the blade mounting bracket 1 is provided with a positioning groove 104 corresponding to the positioning protrusion 203. When the blade mounting bracket 1 and the pressure cap 2 are assembled, the positioning protrusion 203 is engaged in the positioning groove 104 for positioning, so that the blade mounting bracket 1 and the pressure cap 2 are not prone to relative displacement after assembly, thus making the back knife 3 installed stably.

[0034] See Figure 2 , Figure 5, Figure 6 and Figure 7 The blade mounting bracket 1 is provided with a protrusion 105, and a positioning groove 104 is provided through the protrusion 105. The back blade 3 abuts against the protrusion 105 for limiting. The positioning groove 104 on the protrusion 105 positions the positioning protrusion 203, and the protrusion 105 can also limit the back blade 3, further improving the stability of the back blade 3 installation. The protrusion 105 is provided with an abutting part 1051 for abutting the back blade 3. The abutting part 1051 abuts and limits the middle part of the back blade 3, making it less likely for the middle part of the back blade 3 to deform in the second direction. The abutting part 1051 limits the back blade 3 in the second direction. The abutting part 1051 is an abutting plane, which abuts the back blade 3 firmly, making the back blade 3 installation more stable.

[0035] See Figure 1 , Figure 3 and Figure 6 The blade mounting bracket 1 is equipped with several main blades 5. The main blades 5 are positioned between the blade mounting bracket 1 and the pressure cap 2 for limiting their movement. After being limited, the main blades 5 are not easily displaced. The main blades 5 and the back blades 3 are fixed simultaneously through the assembly operation of the blade mounting bracket 1 and the pressure cap 2, which simplifies the assembly steps, improves assembly efficiency, and reduces production costs. During assembly, the main blades 5 and the back blades 3 are first installed on the blade mounting bracket 1, and then the pressure cap 2 is installed on the blade mounting bracket 1 to complete the assembly of this cutter head structure. The operation is simple and fast.

[0036] The blade head structure of this utility model is simple in structure and low in production cost. The blade mounting bracket and the pressure cap are assembled simultaneously to fix the back blade, eliminating the need for additional aluminum sheets or other parts for fixation. This reduces assembly steps, lowers assembly costs, and improves production efficiency. The back blade is securely installed, preventing loosening and providing a superior user experience. The mounting block abuts against the third and fourth limiting surfaces for positioning, thereby limiting the back blade's position. The structure is rationally designed. The pressure cap has a latch, and the blade mounting bracket has corresponding clips. The slot, gland, and blade mounting bracket are connected by a snap-fit ​​mechanism, resulting in a simple structure. During assembly, the positioning protrusion engages with the positioning slot to ensure stability, preventing relative displacement between the blade mounting bracket and gland after assembly. The positioning slot on the protrusion positions the positioning protrusion and also limits the back blade, further enhancing the stability of the back blade installation. The assembly of the blade mounting bracket and gland simultaneously fixes the main blade and back blade, simplifying the assembly process, improving assembly efficiency, and ultimately reducing production costs.

[0037] In addition, this utility model also provides a hair trimmer, including the above-mentioned blade head structure; compared with the prior art, this hair trimmer also has the same beneficial effects of the above-mentioned blade head structure, which will not be described in detail here.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A tool bit structure, characterized by The tool head structure comprises a connected blade mounting frame (1) and a gland (2), the blade mounting frame (1) has a back side (101) provided with a back knife (3) abutting between the blade mounting frame (1) and the gland (2) for limiting.

2. The tool bit structure according to claim 1, wherein The back knife (3) is provided with a blade edge (301), and the gland (2) is provided with a avoiding slot (201) corresponding to the blade edge (301), and the blade edge (301) is exposed to the avoiding slot (201).

3. The tool bit structure according to claim 1, wherein The first limiting part, the second limiting part and the third limiting part are arranged between the blade mounting frame (1) and the gland (2), the first limiting part is used for limiting the back knife (3) in the first direction, the second limiting part is used for limiting the back knife (3) in the second direction, and the third limiting part is used for limiting the back knife (3) in the third direction, and the first direction, the second direction and the third direction are three mutually perpendicular directions in three-dimensional space.

4. The tool bit structure according to claim 3, wherein The first limiting part comprises a first limiting surface (41) and a second limiting surface (42) arranged on the blade mounting frame (1), and the back knife (3) is arranged between the first limiting surface (41) and the second limiting surface (42).

5. The tool bit structure according to claim 3, wherein The second limiting part comprises a third limiting surface (43) and a fourth limiting surface (44) arranged on the blade mounting frame (1), and the back knife (3) is arranged between the third limiting surface (43) and the fourth limiting surface (44).

6. The tool bit structure according to claim 5, wherein The back knife (3) comprises a blade body (31) and a mounting block (32) connected with the blade body (31), and the mounting block (32) abuts between the third limiting surface (43) and the fourth limiting surface (44) for limiting.

7. The tool bit structure according to claim 3, wherein The third limiting part comprises a fifth limiting surface (45) arranged on the blade mounting frame (1) and a sixth limiting surface (46) arranged on the gland (2), and the back knife (3) is arranged between the fifth limiting surface (45) and the sixth limiting surface (46).

8. The tool bit structure according to Claim 1, wherein The gland (2) is provided with a buckle (202), and the blade mounting frame (1) is provided with a clamping groove (103) corresponding to the buckle (202), and when the blade mounting frame (1) and the gland (2) are assembled, the buckle (202) and the clamping groove (103) are clamped.

9. The tool bit structure according to Claim 1, wherein The gland (2) is provided with a positioning protrusion (203), and the blade mounting frame (1) is provided with a positioning groove (104) corresponding to the positioning protrusion (203), and when the blade mounting frame (1) and the gland (2) are assembled, the positioning protrusion (203) is clamped into the positioning groove (104) for positioning.

10. The tool bit structure according to claim 9, wherein The blade mounting frame (1) is provided with a protruding block (105), the positioning groove (104) is arranged on the protruding block (105), and the back knife (3) abuts on the protruding block (105) for limiting.

11. A tool bit structure according to any one of claims 1-10, characterized in that A plurality of main blades (5) are arranged on the blade mounting frame (1), and the main blades (5) are limited between the blade mounting frame (1) and the gland (2).

12. A hair trimmer characterized by The tool bit structure as claimed in any one of claims 1 to 11.

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