A mounting structure for a hair trimmer

Abstract

This utility model provides an installation structure for a hair trimmer, including a housing and a blade head. The housing contains a charging component and a power component. The housing includes an upper shell and a lower shell. The lower shell includes a connecting part with a mounting hole. A copper nut is fitted into the mounting hole. The blade head includes a moving blade assembly, a fixed blade, and a spring. The spring is located on the lower shell. The fixed blade has a hole corresponding to the copper nut. A screw passes through the hole and screws the copper nut in, fixing the fixed blade to the lower shell. The moving blade assembly is clamped between the fixed blade and the spring. First, the moving blade assembly and the power component are connected via a transmission rod inserted into a drive slot. Then, the fixed blade is fixed to the copper nut on the lower shell by the screw, creating dynamic pressure on the moving blade assembly. Disassembly only requires removing the screw to remove the fixed blade, enabling quick blade head repair and replacement, avoiding complete disassembly; simplifying the assembly process and improving production line efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of hair trimmers, specifically relating to an installation structure for a hair trimmer. Background Technology

[0002] In daily life, hair trimmers are commonly used hairdressing and styling tools. In the traditional installation of hair trimmers, the blade assembly (moving blade and fixed blade) is usually pre-assembled as an integrated sub-unit before being assembled into the power unit. This structure has significant drawbacks: repairing or replacing the blade requires disassembling the entire sub-unit, which involves many parts and is prone to secondary damage; the pre-assembled structure means that local faults require overall handling, increasing time and labor costs; the blade is fixed by conventional nuts, and repeated disassembly and assembly can easily lead to thread wear or deformation of the outer shell holes, reducing its service life. Utility Model Content

[0003] (1) Technical problems to be solved This invention provides an installation structure for a hair trimmer, aiming to solve the problems of difficult disassembly and easy wear of the blade head.

[0004] (2) Technical solution This utility model provides an installation structure for a hair trimmer, including a housing and a blade head. The housing houses a charging component and a power component. The housing includes an upper shell and a lower shell, which are detachably connected. The lower shell includes a connecting portion with a mounting hole in which a copper nut is engaged. The blade head includes a moving blade assembly, a fixed blade, and a spring. The power component includes a transmission rod. The moving blade assembly has a drive groove adapted to the transmission rod. When the transmission rod is inserted into the drive groove, the power component drives the moving blade assembly to reciprocate. The spring is located on the lower shell. The fixed blade has a fixed blade hole corresponding to the copper nut. A screw passes through the fixed blade hole and screws the copper nut to fix the fixed blade to the lower shell. The moving blade assembly is clamped between the fixed blade and the spring.

[0005] Furthermore, the copper nut includes a cylindrical portion and a cubic portion, the cylindrical portion being adapted to the mounting hole, the cross-sectional area of ​​the cubic portion being S1, the cross-sectional area of ​​the cylindrical portion being S2, and S1>S2.

[0006] Furthermore, the cylindrical portion has a beveled end on the side away from the cubic portion.

[0007] Furthermore, the cylindrical portion has teeth on its outer surface near the cubic portion, and the mounting hole has friction parts that are adapted to the teeth.

[0008] Furthermore, the connecting part is also provided with a limiting groove that is adapted to the cubic part.

[0009] Furthermore, the spring includes a pressure foot and a spring body, with the tail end of the pressure foot bent.

[0010] Furthermore, the spring body includes a transverse connecting part, and the lower shell is provided with an outer exposed compartment. The outer exposed compartment includes a snap-fit ​​part, and the snap-fit ​​part is provided with a limiting hook adapted to the transverse connecting part. The transverse connecting part is snap-fitted to the limiting hook.

[0011] Furthermore, the spring body also includes a curved portion, and the exposed outer cavity is provided with a mounting groove adapted to the curved portion, the curved portion being engaged in the mounting groove.

[0012] Furthermore, the moving blade assembly includes a transmission seat and a moving blade. The top of the transmission seat is provided with an abutment groove, and the tail end of the pressure foot presses against the abutment groove and applies pressure to the transmission seat in the direction of the moving blade.

[0013] Furthermore, the transmission seat is provided with a positioning rod, and the moving blade is provided with an alignment hole that is adapted to the positioning rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. First, insert the moving blade assembly and the power assembly into the drive slot through the transmission rod. Then, fix the fixed blade to the copper nut on the lower shell with screw one, forming a dynamic clamping on the moving blade assembly. When disassembling, only screw one needs to be removed to remove the fixed blade, realizing quick maintenance and replacement of the blade head and avoiding overall disassembly; simplifying the assembly process and improving the efficiency of the production line.

[0015] 2. The cubic part of the copper nut is inserted into the limiting square groove to prevent the screw from rotating when it is screwed into the copper nut; at the same time, the toothed part on the copper nut forms a one-way mechanical self-locking with the friction part in the mounting hole, resisting loosening caused by vibration or axial force of the screw, and the ductility of copper reduces thread wear and supports repeated disassembly and assembly.

[0016] 3. During the installation of the fixed and moving blade components, the pressure from the spring gradually increases, making installation simple.

[0017] 4. The limiting hook and locking part are set on the lower shell, which provides more space, thickness and strength, ensuring the product's firmness and stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is an exploded view of the entire utility model.

[0020] Figure 3 This is an exploded view of the blade of this utility model.

[0021] Figure 4 This is an exploded view of the copper nut and lower shell of this utility model.

[0022] Figure 5 This is a schematic diagram of the copper nut structure of this utility model.

[0023] Figure 6 This is a schematic diagram comparing the areas of the cubic and cylindrical portions of this utility model.

[0024] Figure 7 This is a schematic diagram of the exposed lower shell compartment structure of this utility model.

[0025] Figure 8 This is a schematic diagram of the spring structure of this utility model.

[0026] Figure 9 This is an exploded view of the moving blade assembly of this utility model.

[0027] Figure 10 This is a schematic diagram showing the connection between the power component and the cutter head of this utility model.

[0028] Reference numerals: 1-Outer shell, 11-Upper shell, 12-Lower shell, 121-Connecting part, 1211-Mounting hole, 1212-Limiting square groove, 1213-Friction part, 122-Outer exposed chamber, 123-Snap-fit ​​part, 1231-Limiting hook, 124-Mounting groove, 13-Screw three, 2-Cutter head, 21-Moving blade assembly, 211-Transmission seat, 2111-Abutting groove, 2112-Positioning rod, 2113-Connecting hole three, 2114-Drive groove, 212-Moving blade, 2121-Alignment hole 2122-Connecting Hole II, 213-Guide Block, 2131-Connecting Hole I, 22-Fixed Blade, 221-Fixed Blade Hole, 222-Guide Groove, 23-Spring, 231-Pressure Foot, 232-Spring Body, 2321-Horizontal Connector, 2322-Bent Section, 24-Screw I, 25-Screw II, 3-Charging Component, 4-Power Component, 41-Transmission Rod, 5-Copper Nut, 51-Cylindrical Section, 511-Bevel, 512-Tooth Section, 52-Cube Section, 53-Internal Thread, 6-Battery Component. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] like Figure 1-10As shown, this utility model provides an installation structure for a hair trimmer, including a housing 1 and a blade head 2. The housing 1 is provided with a charging component 3 and a power component 4. The housing 1 includes an upper shell 11 and a lower shell 12, which are detachably connected. The lower shell 12 includes a connecting part 121, which has a mounting hole 1211. A copper nut 5 is provided in the mounting hole 1211, and the copper nut 5 has an internal thread 53. The blade head 2 includes a moving blade component 21, a fixed blade 22, and a spring 23. The fixed blade 22 has a fixed blade hole 221 corresponding to the copper nut 5, and also includes a screw 24 adapted to the internal thread 53. like Figure 3-4 As shown, during installation, the copper nut 5 is installed in the mounting hole 1211, the spring 23 is installed on the lower shell 12, and then the charging component 3 and the power component 4 are installed in the lower shell 12. Next, the drive groove 2114 of the assembled moving blade component 21 is aligned with the transmission rod 41 to assemble the moving blade component 21 and the power component 4. Finally, the screw 24 is screwed through the fixed blade hole 221 and fixed to the copper nut 5, and the fixed blade 22 is pressed tightly against the moving blade component 21 and fixedly connected to the lower shell 12. The moving blade component 21 is then clamped between the fixed blade 22 and the spring 23.

[0031] Existing technologies typically assemble the moving blade assembly 21 and the fixed blade 22 together, pre-assembling them as a single unit before connecting the moving blade assembly 21 to the power assembly 4. If repair or replacement of the blade head 2 is required, the entire subunit must be disassembled, potentially involving more components and increasing maintenance complexity. In contrast, this application assembles the moving blade assembly 21 first, connects it to the power assembly 4, and then secures the fixed blade 22 to the lower housing 12 using screw 24 and copper nut 5. This assembly method is simple; during disassembly, simply loosening screw 24 allows removal of the fixed blade 22, making maintenance and disassembly more convenient. Furthermore, the spring force of the spring 23 increases progressively as the screw 24 and copper nut 5 are tightened, preventing increased installation difficulty due to excessive spring force. This contrasts sharply with existing technologies that typically install the moving blade assembly 21 and fixed blade 22 first, which would otherwise face significantly increased installation difficulty due to excessive spring force.

[0032] Furthermore, such as Figure 2 As shown, a battery assembly 6 is also installed between the charging assembly 3 and the power assembly 4. The charging assembly 3, the battery assembly 6 and the power assembly 4 are all installed on the lower shell 12. The charging assembly 3 is used to connect to the power supply and store electrical energy in the battery assembly 6, so that the hair trimmer can still be used normally when the power is not connected.

[0033] Specifically, such as Figure 5-7 As shown, the copper nut 5 includes a cylindrical portion 51 and a cubic portion 52. The connecting portion 121 has a limiting square groove 1212 adapted to the cubic portion 52. The cylindrical portion 51 is adapted to the mounting hole 1211. The cross-sectional area of ​​the cubic portion 52 is S1, and the cross-sectional area of ​​the cylindrical portion 51 is S2, where S1 > S2. When the cylindrical portion 51 is inserted into the mounting hole 1211, the cubic portion 52 will be stuck outside the mounting hole 1211, and the plane of the cubic portion 52 will... The cuboid part 52 fits into the limiting square groove 1212 to prevent the copper nut 5 from rotating. Otherwise, when the screw 24 is screwed in, the copper nut 5 may rotate in the mounting hole 1211, which will affect the assembly efficiency. At the same time, when the screw 24 is tightened, the cuboid part 52 distributes the axial force generated by the screw 24 more evenly to the surface of the connecting part 121, avoiding stress concentration. This can prevent the outer shell 1 material around the mounting hole 1211 from cracking or deforming due to pressure, and improve the durability of the overall structure.

[0034] Preferably, copper is chosen because it has good ductility and wear resistance, can withstand repeated screw tightening operations, reduces thread wear, and extends service life. During maintenance, such as replacing the cutter head 2, screw 24 can be easily removed, while the copper nut 5 remains fixed on the lower shell 12, is not easily lost, and is convenient for repeated disassembly. At the same time, the copper material also reduces thread wear, ensuring reliable fixation after multiple assemblies.

[0035] Preferably, such as Figure 5 As shown, the cylindrical part 51 has a bevel 511 at the end away from the cubic part 52. The bevel 511 acts as a guide when pressed into the mounting hole 1211 to avoid edge jamming and improve the efficiency of automated assembly. At the same time, the bevel 511 reduces hard contact with the hole opening and prevents the plastic at the entrance of the mounting hole 1211 from cracking.

[0036] Furthermore, such as Figure 5 As shown, the cylindrical portion 51 has teeth 512 on its outer surface near the cubic portion 52, such as... Figure 7 As shown, the mounting hole 1211 is provided with a friction part 1213 that matches the toothed part 512. The toothed part 512 on the outer surface of the cylindrical part 51 engages with the friction part 1213 in the mounting hole 1211. When the cylindrical part 51 is pressed into the mounting hole 1211, the toothed part 512 is forced through the friction part 1213, and the elastic deformation of the plastic allows it to pass through; however, when pulled out in the opposite direction, the toothed part 512 hooks onto the friction part 1213 to form a mechanical self-locking mechanism, preventing the copper nut 5 from axially retracting even under vibration or screw tension.

[0037] Specifically, such as Figure 8As shown, the spring 23 includes a pressure foot 231 and a spring body 232. The tail end of the pressure foot 231 is bent. The moving blade assembly 21 includes a transmission seat 211 and a moving blade 212. The top of the transmission seat 211 is provided with an abutment groove 2111. The tail end of the pressure foot 231 presses against the abutment groove 2111 and applies pressure to the transmission seat 211 in the direction of the moving blade 212. Through the downward pressing of the spring 23, the transmission seat 211 and the moving blade 212 are kept in contact with the fixed blade 22. At the same time, when the moving blade assembly 21 reciprocates, the pressure foot 231 of the spring 23 will deform. Under the elastic action of the deformation of the pressure foot 231, the moving blade assembly 21 will move in the opposite direction to achieve rapid reset. During the reciprocating swing of the transmission seat 211, the contact point position between the transmission seat 211 and the pressure foot 231 will change relatively.

[0038] Furthermore, such as Figure 3 and Figure 8 As shown, the spring body 232 includes a transverse connecting part 2321, and the lower shell 12 is provided with an outer exposed chamber 122. The outer exposed chamber 122 includes a snap-fit ​​part 123, and the snap-fit ​​part 123 is provided with a limiting hook 1231 adapted to the transverse connecting part 2321. The transverse connecting part 2321 is snapped onto the limiting hook 1231 to form a main fixing point, which bears the tangential force when the spring 23 is working. The length direction of the transverse connecting part 2321 is parallel to the swing direction of the moving blade 212. The hook-shaped structure of the limiting hook 1231 achieves one-way locking to prevent the spring 23 from disengaging. It is worth noting that when the screw 24 and the copper nut 5 are tightened together, the pressure foot 2 The pressure applied to the fixed blade 22 is at its maximum at this time. At this time, the limit hook 1231 also bears the maximum elastic force of the cross joint 2321. Since the limit hook 1231 and the locking part 123 are set on the lower shell 12, the limit hook 1231 and the locking part 123 set on the lower shell 12 have a larger setting space, a larger setting thickness and greater strength, which ensures the product's firmness and stability. Compared with the prior art, which usually installs the moving blade assembly 21 and the fixed blade 22 first and sets the limit hook 1231 on the transmission seat 211, the limit hook 1231 set on the transmission seat 211 often breaks under the continuous elastic force of the spring 23.

[0039] Furthermore, such as Figure 8As shown, the spring body 232 also includes a bent portion 2322. The outer exposed chamber 122 is provided with a mounting groove 124 adapted to the bent portion 2322. The bent portion 2322 is engaged in the mounting groove 124. The structure of the bent portion 2322 and the mounting groove 124 form a surface contact constraint, which suppresses the torque generated by the swing of the moving blade 212 on the spring body 232, prevents the spring 23 from moving radially, and absorbs the impact load when the transmission seat 211 swings, extending the life of the moving blade assembly 21. At the same time, the bent portion 2322 undergoes micro-elastic deformation during vibration, reducing working noise and improving user comfort.

[0040] Specifically, such as Figure 9 As shown, the transmission seat 211 is provided with a positioning rod 2112, and the moving blade 212 is provided with an alignment hole 2121 adapted to the positioning rod 2112. When assembling the transmission seat 211 and the moving blade 212, the positioning rod 2112 is aligned with the alignment hole 2121 and inserted for preliminary positioning. The positioning rod 2112 is designed to facilitate the assembly of the moving blade assembly 21.

[0041] Specifically, the moving blade assembly 21 further includes a guide block 213, and the fixed blade 22 is provided with a guide groove 222 adapted to the guide block 213. In use, the moving blade assembly 21 performs a reciprocating swing motion under the action of the power assembly 4, so that the guide block 213 slides in the guide groove 222. By setting the guide block 213 and the guide groove 222, the movement of the moving blade assembly 21 is made stable.

[0042] Specifically, the guide block 213 is provided with a first connection hole 2131, the moving blade 212 is provided with a second connection hole 2122 corresponding to the first connection hole 2131, and the transmission seat 211 is provided with a third connection hole 2113 corresponding to the second connection hole 2122. During assembly, the guide block 213, the moving blade 212, and the transmission seat 211 are connected and fixed together by screws 25 passing through the third connection hole 2113, the second connection hole 2122, and the first connection hole 2131, so that the moving blade assembly 21 is assembled in place. This assembly method is simple, easy to disassemble and assemble, shortens the assembly time, and improves the assembly efficiency.

[0043] Specifically, such as Figure 10 As shown, the power assembly 4 includes a transmission rod 41, and the moving blade assembly 21 is provided with a drive groove 2114 that is adapted to the transmission rod 41. The transmission rod 41 is inserted into the drive groove 2114, and the transmission rod 41 reciprocates under the drive of the power assembly 4, thereby driving the moving blade assembly 21 to perform reciprocating oscillating motion.

[0044] Preferably, such as Figure 2As shown, the upper shell 11 and the lower shell 12 are connected by screws 13 to complete the overall assembly. This screw connection design facilitates disassembly and replacement of parts.

[0045] The following is a detailed explanation of the working principle of this utility model; During installation, first, install the copper nut 5 into the mounting hole 1211 of the lower shell 12, so that the cubic part 52 of the copper nut 5 engages with the limiting square groove 1212, and the toothed part 512 on the cylindrical part 51 of the copper nut 5 engages with the friction part 1213 on the mounting hole 1211 to form a mechanical interlock. Next, install the spring 23 onto the outer exposed compartment 122 of the lower shell 12, so that its transverse connecting part 2321 engages with the limiting hook 1231, and the bent part 2322 is embedded in the mounting groove 124. Then, install the charging component 3, battery component 6, and power component 4 onto the lower shell 12. Finally, install the assembled moving blade component 21. The drive slot 2114 is aligned with the transmission rod 41 of the power assembly 4. The end of the pressure foot 231 of the spring 23 is pressed into the abutment slot 2111 of the moving blade assembly 21, so that the transmission rod 41 is inserted into the drive slot 2114 to achieve the drive connection between the two. Finally, the fixed blade hole 221 of the fixed blade 22 is aligned with the copper nut 5 installed on the mounting hole 1211, and the screw 24 passes through the fixed blade hole 221 and is screwed to the copper nut 5. The moving blade assembly 21 is clamped between the fixed blade 22 and the spring 23. Finally, the upper shell 11 and the lower shell 12 are screwed and locked together by the screw 13 to complete the assembly of the hair trimmer.

[0046] The innovation of this utility model lies in firstly connecting the moving blade assembly and the power assembly separately via a transmission rod inserted into the drive slot; then, using screw one, the fixed blade is independently fixed to the copper nut on the lower shell, forming a dynamic clamping effect on the moving blade assembly. During disassembly, only screw one needs to be removed to remove the fixed blade, enabling quick maintenance and replacement of the blade head, avoiding overall disassembly, simplifying the assembly process, and improving production line efficiency. The cubic part of the copper nut is engaged in the limiting square groove, preventing the screw one from rotating when screwing into the copper nut; at the same time, the toothed part on the copper nut forms a one-way mechanical self-locking with the friction part in the mounting hole, resisting loosening caused by vibration or axial force of the screw, and the ductility of the copper material reduces thread wear, supporting repeated disassembly and assembly.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mounting structure for a hair trimmer, characterized in that, The device includes a housing (1) and a cutting head (2). The housing (1) contains a charging assembly (3) and a power assembly (4). The housing (1) includes an upper shell (11) and a lower shell (12). The upper shell (11) and the lower shell (12) are detachably connected. The lower shell (12) includes a connecting part (121) with a mounting hole (1211) and a copper nut (5) is fitted into the mounting hole (1211). The cutting head (2) includes a moving blade assembly (21), a fixed blade (22), and a spring (23). The power assembly (4) includes a transmission rod (41). The moving blade assembly (21) has a drive groove (2114) that matches the transmission rod (41). When the transmission rod (41) is inserted into the drive groove (2114), the power assembly (4) drives the moving blade assembly (21) to swing back and forth. The spring (23) is located on the lower shell (12). The fixed blade (22) is provided with a fixed blade hole (221) corresponding to the copper nut (5). A screw (24) passes through the fixed blade hole (221) and screws the copper nut (5) to fix the fixed blade (22) to the lower shell (12). The moving blade assembly (21) is clamped between the fixed blade (22) and the spring (23).

2. The mounting structure of a hair trimmer according to claim 1, characterized in that, The copper nut (5) includes a cylindrical part (51) and a cubic part (52). The cylindrical part (51) is adapted to the mounting hole (1211). The cross-sectional area of ​​the cubic part (52) is S1, and the cross-sectional area of ​​the cylindrical part (51) is S2, and S1>S2.

3. The mounting structure of a hair trimmer according to claim 2, characterized in that, The cylindrical portion (51) has a bevel (511) at the end away from the cubic portion (52).

4. The mounting structure of a hair trimmer according to claim 3, characterized in that, The cylindrical part (51) has a toothed part (512) on its outer surface near the cubic part (52), and the mounting hole (1211) has a friction part (1213) that is adapted to the toothed part (512).

5. The mounting structure of a hair trimmer according to claim 2, characterized in that, The connecting part (121) is also provided with a limiting groove (1212) that is adapted to the cubic part (52).

6. The mounting structure of a hair trimmer according to claim 1, characterized in that, The spring (23) includes a pressure foot (231) and a spring body (232), with the end of the pressure foot (231) bent.

7. The mounting structure of a hair trimmer according to claim 6, characterized in that, The spring body (232) includes a transverse connecting part (2321), and the lower shell (12) is provided with an outer exposed compartment (122). The outer exposed compartment (122) includes a snap-fit ​​part (123), and the snap-fit ​​part (123) is provided with a limiting hook (1231) that is adapted to the transverse connecting part (2321). The transverse connecting part (2321) is snapped onto the limiting hook (1231).

8. The mounting structure of a hair trimmer according to claim 7, characterized in that, The spring body (232) also includes a curved portion (2322), and the outer exposed compartment (122) is provided with a mounting groove (124) adapted to the curved portion (2322), and the curved portion (2322) is engaged in the mounting groove (124).

9. The mounting structure of a hair trimmer according to claim 6, characterized in that, The moving blade assembly (21) includes a transmission seat (211) and a moving blade (212). The transmission seat (211) has an abutment groove (2111) on its top. The tail end of the pressure foot (231) presses against the abutment groove (2111) and applies pressure to the transmission seat (211) in the direction of the moving blade (212).

10. The mounting structure of a hair trimmer according to claim 9, characterized in that, The transmission seat (211) is provided with a positioning rod (2112), and the moving blade (212) is provided with a positioning hole (2121) that is adapted to the positioning rod (2112).

Images