A hair trimmer
By embedding a transparent viewing window and designing a bracket to avoid obstructions in the upper shell of the hair trimmer, the problem of difficulty in observing the movement of the moving part is solved, enabling rapid fault diagnosis and improved mechanical movement, thereby enhancing user experience and product maintainability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN KEDE PRECISION MFG CO LTD
- Filing Date
- 2025-08-02
- Publication Date
- 2026-07-31
AI Technical Summary
In existing hair trimmers, the motion state of the linear motor's mover is difficult to observe, and traditional designs cannot showcase the aesthetic appeal of mechanical motion, affecting user experience and product sales.
The hair trimmer has mounting holes on its upper shell and a transparent viewing window embedded in them. The bracket is designed with a clearance part to match the viewing window, ensuring that the movement of the motor is visible, the bracket does not obstruct the view, and the shell is sealed.
It enables observation of the moving part's working status without disassembling the casing, facilitating fault diagnosis, enhancing user experience and the visual appeal of mechanical movements, and protecting motor components.
Smart Images
Figure CN224575738U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of hairdressing tools, specifically relating to a hair trimmer. Background Technology
[0002] Existing hair trimmers suffer from the following technical challenges: the linear motor's actuator is typically completely enclosed by a full-coverage bracket, preventing users from directly observing its movement, such as jamming, abnormal amplitude, or interference from foreign objects. Furthermore, fault diagnosis requires disassembling the casing, a cumbersome process that can easily damage the internal structure. Adding an observation window to traditional designs may compromise the casing's seal, allowing hair debris and moisture to penetrate the motor's core components, affecting its lifespan. Additionally, the bracket structure can obstruct the view, making it difficult to effectively observe the actuator's trajectory even with the window open. Hair trimmers utilize high-speed linear motors, whose high-speed linear reciprocating motion is highly visually appealing. Current technology cannot perfectly showcase this visual appeal, failing to meet consumer psychological needs and hindering product sales. Utility Model Content
[0003] (1) Technical problems to be solved
[0004] This invention provides a hair trimmer designed to solve the problem of difficulty in observing the movement of the moving parts.
[0005] (2) Technical solution
[0006] This utility model provides a hair trimmer, including a housing and a linear motor. The housing includes a detachably connected upper shell and a lower shell. The linear motor includes a bracket, a stator, a mover, and an elastic element. The mover is connected to the bracket through the elastic element and is suspended relative to the stator. The stator is fixedly connected to the bracket and drives the two movers to move back and forth alternately.
[0007] The upper shell has a mounting hole corresponding to the moving part, and a viewing window is fixedly installed in the mounting hole. The bracket includes a clearance part, which is adapted to the shape of the viewing window and does not obstruct the movement of the moving part. The movement state of the moving part can be easily observed through the viewing window and the clearance part of the bracket.
[0008] Furthermore, the perspective window is circular.
[0009] Furthermore, the recessed portion is arc-shaped to match the shape of the viewing window and is symmetrically designed along the central axis L1.
[0010] Furthermore, the viewing window includes a fixing ring and a transparent element. The upper shell has an annular groove around the mounting hole that is adapted to the transparent element. The transparent element is fixedly connected to the annular groove by the fixing ring.
[0011] Furthermore, the fixing ring includes a support leg, the annular groove is provided with a through hole adapted to the support leg, and the transparent part is provided with a through hole adapted to the support leg. The support leg passes through the through hole and the through hole in sequence to fix the transparent part to the annular groove.
[0012] Furthermore, the fixing ring includes a ring connecting block, and the transparent part is provided with an annular groove II adapted to the ring connecting block, and the height of the annular groove II is consistent with the height of the ring connecting block.
[0013] Furthermore, the upper shell is also provided with a lifting hole, and a button is provided in the lifting hole. The button includes a button and silicone, and the fastener fixes the silicone and the button to the upper shell.
[0014] Furthermore, the upper shell is provided with a second support leg extending toward the lower shell, and the fixing member is provided with a connection hole adapted to the second support leg.
[0015] Furthermore, the button includes a connecting rod and a circular ring. The fixing member has a through hole three that corresponds to the connecting rod, and the silicone has a through hole four that corresponds to the connecting rod. The through hole four corresponds vertically to the through hole three.
[0016] Furthermore, the bottom of the annular portion is also provided with an alignment rod extending toward the lower shell and arranged parallel to the connecting rod, and the silicone is provided with an alignment hole adapted to the alignment rod.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] Mounting holes are made in the upper shell and a transparent viewing window is embedded, allowing users to observe the working status of the mover without disassembling the shell. The bracket is equipped with a clearance part whose outline matches the shape of the viewing window, completely eliminating the obstruction of the view of the mover's movement trajectory by the bracket. This ensures that the entire path of the mover is exposed to the observation window, enabling rapid fault diagnosis such as jamming detection, improving product maintainability, maintaining the integrity of the shell, greatly enhancing the aesthetics of mechanical movement, and greatly satisfying consumers' psychological needs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0020] Figure 2 This is an exploded view of the entire utility model.
[0021] Figure 3 This is a schematic diagram of the linear motor structure of this utility model.
[0022] Figure 4This is an exploded view of the linear motor of this utility model.
[0023] Figure 5 This is an exploded view of the perspective window of this utility model.
[0024] Figure 6 This is a schematic diagram of the support structure of this utility model.
[0025] Figure 7 This is a schematic diagram showing the connection between the upper shell and the button of this utility model.
[0026] Figure 8 This is an exploded view of the button and the upper shell of this utility model.
[0027] Figure 9 This is a schematic diagram of the button connection of this utility model.
[0028] Figure 10 This is an exploded view of the button of this utility model.
[0029] Figure 11 This is a side sectional view of the upper shell and button of this utility model.
[0030] Figure 12 This is a front sectional view of the upper shell and button of this utility model.
[0031] Reference numerals: 1-Outer shell, 11-Upper shell, 111-Mounting hole, 112-Annular groove one, 1121-Through hole one, 113-Lifting hole, 114-Support leg two, 115-Protrusion, 1151-Annular groove three, 1152-Alignment block, 12-Lower shell, 13-Fastener, 2-Linear motor, 21-Bracket, 211-Allowing part, 212-Front bracket, 213-Rear bracket, 214-Abutting block, 22-Stator, 23-Motor, 24-Elastic element, 241-Elastic body one, 242-Elastic Body 2, 3-Transparent window, 31-Fixing ring, 311-Support leg 1, 312-Ring block, 32-Transparent part, 321-Perforation 2, 322-Annular groove 2, 4-Button, 41-Button, 411-Connecting rod, 412-Alignment rod, 413-Circular part, 42-Silicone, 421-Perforation 4, 422-Pressing part, 423-Connecting part, 424-Receiving cavity 1, 425-Alignment hole, 426-Notch, 43-Fixing part, 431-Connecting hole, 432-Perforation 3, 433-Receiving cavity 2. Detailed Implementation
[0032] 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.
[0033] like Figure 1-12As shown, this utility model provides a hair trimmer, including a housing 1 and a linear motor 2. The housing 1 includes a detachably connected upper shell 11 and a lower shell 12. The linear motor 2 is located in the internal accommodating space formed by the connection of the upper shell 11 and the lower shell 12. The upper shell 11 and the lower shell 12 are fixedly connected by fasteners 13. In this embodiment, the fasteners 13 are screws. The detachable connection of the upper shell 11 and the lower shell 12 facilitates the assembly and maintenance of the internal components.
[0034] like Figure 3-4 As shown, the linear motor 2 includes a bracket 21, a stator 22, a mover 23, and an elastic element 24. In this embodiment, there are two movers 23. The movers 23 are connected to the bracket 21 through the elastic element 24 and are suspended relative to the stator 22. The stator 22 is fixedly connected to the bracket 21 and drives the two movers 23 to move back and forth alternately. When in use, the stator 22 generates an alternating magnetic field after being energized, which drives the two movers 23 to move back and forth alternately in opposite directions under the constraint and reset action of their respective elastic elements 24. This avoids rigid contact friction, reduces noise and wear, and improves efficiency and lifespan.
[0035] Specifically, the support 21 includes a front support 212 and a rear support 213. The front support 212 and the rear support 213 are fixedly connected to form an internal space for accommodating the mover 23 and the stator 22. Both the front support 21 and the rear support 213 are provided with abutment blocks 214. The elastic element 24 includes an elastic body 1 241 and an elastic body 242. One end of the elastic body 242 is fixedly connected to the stator 22, and the other end is connected to the mover 23. One end of the elastic body 1 241 abuts against the abutment block 214, and the other end abuts against the mover 23, so that the two movers 23 move alternately and reciprocally in opposite directions under the constraint and reset action of the elastic body 242 and the elastic body 1 241.
[0036] Among them, such as Figure 5 As shown, in order to facilitate users or maintenance personnel to visually observe the working status of the internal mover 23 of the linear motor 2 without disassembling the outer casing 1, such as whether the linear motor 2 is stuck, whether the movement amplitude is normal, or whether there is any foreign object interference, so as to perform fault diagnosis or status confirmation, the upper casing 11 is provided with a mounting hole 111 corresponding to the movement of the mover 23. A viewing window 3 is fixedly installed in the mounting hole 111. The viewing window 3 is made of transparent material, and the user can observe the movement status of the internal linear motor 2 through the viewing window 3.
[0037] In traditional designs, the support 21 is typically designed as a fully enclosed structure, which extensively wraps around the mover 23 and stator 22. This design usually obstructs the view of the mover 23 during its movement, preventing the operator from observing its movement through the viewing window 3. Therefore, to better observe the movement of the mover 23, the support 21 includes a recess 211. The recess 211 is shaped to fit the viewing window 3 and does not obstruct the movement of the mover 23, ensuring that the support 21 itself does not obstruct the view of the mover 23's trajectory through the viewing window 3. The movement of the mover 23 can be easily observed through the viewing window 3 and the recess 211 of the support 21.
[0038] By embedding the mounting hole 111 of the viewing window 3 in the upper shell 11 and combining it with the corresponding clearance part 211 on the bracket 21, the working status of the key moving part 23 of the internal linear motor 2 is cleverly observed without affecting the sealing and protection performance of the outer shell 1. This greatly facilitates the use monitoring, fault diagnosis and maintenance of the product, and improves the user experience and maintainability of the product.
[0039] Furthermore, such as Figure 5-6 As shown, in this embodiment, the viewing window 3 is circular, and the avoidance part 211 is arc-shaped and symmetrically designed along the central axis L1. The arc-shaped contour of the avoidance part 211 is adapted to the edge shape of the circular viewing window 3. The design of the circular viewing window 3 enhances the overall aesthetics and maximizes the exposure range of the key areas of the movement path of the mover 23. This ensures that the entire reciprocating movement trajectory of the mover 23 can be clearly and unobstructedly observed through the center and surrounding areas of the circular viewing window 3. At the same time, the arc-shaped design, while ensuring sufficient avoidance space, can better maintain the local structural rigidity and strength of the support 21 compared to shapes such as rectangular notches, avoiding stress concentration or structural weakness caused by opening avoidance.
[0040] Preferably, the viewing window 3 can be designed into various shapes according to the shape of the outer shell 1, such as rectangular, polygonal, etc.
[0041] like Figure 5 As shown, the viewing window 3 includes a fixing ring 31 and a transparent element 32. The transparent element 32 can be made of transparent materials such as glass, PC, and acrylic, providing an observation channel. The fixing ring 31 is used to firmly and seal the transparent element 32 onto the upper shell 11.
[0042] Furthermore, the fixing ring 31 includes a ring block 312 and a plurality of legs 311 extending from the ring block 312 toward the transparent component 32. The upper shell 11 is provided with an annular groove 112 around the inner side of the mounting hole 111. The annular groove 112 is adapted to the shape of the transparent component 32 and is used to accommodate and position the transparent component 32.
[0043] Furthermore, the annular groove 112 is provided with a through hole 1121 adapted to the support leg 311, and the transparent part 32 is provided with a through hole 321 adapted to the support leg 311. During installation, the transparent part 32 is first placed in the annular groove 112, and the through hole 1121 and the through hole 321 correspond one-to-one. Then, the fixing ring 31 is placed above the transparent part 32, and the support leg 311 is aligned with the through hole 1121 and the through hole 321, so that the support leg 311 passes through the through hole 321 and the through hole 1121 in sequence to fix the transparent part 32 to the annular groove 112. After the support leg 311 passes through the through hole 1121, the part of its end away from the ring block 312 that extends below the annular groove 112 is fused, for example, by heat fusion.
[0044] After the molten plastic cools, a rivet head larger than the diameter of the perforation 1121 is formed, which firmly locks the retaining ring 31, the transparent part 32 and the annular groove 112 area of the upper shell 11 together, preventing the components from loosening. The fusion process allows the plastic material to be tightly fused or form a sealing ring around the perforation 1121, effectively blocking the channel through which the support leg 311 passes. Together with the annular groove 112, it forms a sealing barrier, significantly enhancing the sealing performance between the viewing window 3 and the upper shell 11. It reliably prevents hair debris, dust, moisture or cleaning liquids from seeping into the interior of the shell through the mounting hole 111, protecting the sensitive linear motor 2 assembly.
[0045] Furthermore, the transparent component 32 is provided with an annular groove 322 that is adapted to the annular block 312, and the height of the annular groove 322 is the same as the height of the annular block 312, so that the annular block 312 can be completely embedded in the annular groove 322, saving vertical space to the greatest extent. At the same time, this design is aesthetically pleasing, easy to position and assemble, and achieves a gapless fit.
[0046] like Figure 7-9As shown, the upper shell 11 is also provided with a lifting hole 113 and a protrusion 115. A button 4 is provided in the lifting hole 113 for starting and pausing the hair trimmer. The button 4 includes a button 41, silicone 42 and a fixing member 43. The silicone 42 is elastic and is the element that enables the button 41 to rebound and provide tactile feedback. The fixing member 43 fixes the silicone 42 to the upper shell 11. The silicone 42 includes a pressing part 422 and a connecting part 423. The fixing member 43 is provided with a second receiving cavity 433. The connecting part 423 of the silicone 42 is placed into the second receiving cavity 433 of the fixing member 43. The second receiving cavity 433 forms a precise wrapping and support for the connecting part 423 and the protrusion 115, and disperses the stress during pressing, preventing the silicone 42 from being excessively deformed or torn locally, thus improving durability.
[0047] Furthermore, such as Figure 8 As shown, the upper shell 11 is provided with a protrusion 115 around the lifting hole 113 in the direction of extension toward the lower shell 12. The protrusion 115 is provided with an annular groove 1151 that is adapted to the silicone 42. In use, the silicone 42 is aligned with the annular groove 1151 and pressed in to achieve the initial positioning of the silicone 42.
[0048] Furthermore, such as Figure 8-10 As shown, the silicone 42 has a notch 426, and the annular groove 3 1151 has an alignment block 1152 adapted to the notch 426. This design enables the silicone 42 to form an anti-rotation mechanism when it is inserted into the annular groove 3 1151.
[0049] Furthermore, the inner surface of the upper shell 11 is provided with a plurality of support legs 114 extending toward the lower shell 12. The fixing member 43 is provided with connection holes 431 that are adapted to the support legs 114. The position and number of support legs 114 correspond to the connection holes 431 on the fixing member 43. During installation, the connecting part 423 is first inserted into the annular groove 1151 and the notch 426 is aligned with the alignment block 1152 to achieve preliminary positioning while preventing the silicone 42 from rotating. Then, the connection hole 431 of the fixing member 43 is aligned with the support legs 114 and the support legs 114 are inserted into the connection hole 431. The connecting part 423 of the silicone 42 is placed into the receiving cavity 433 of the fixing member 43. The ends of the support legs 114 are fused to form a riveting head, thereby firmly and irreversibly locking the fixing member 43 onto the upper shell 11.
[0050] Furthermore, such as Figure 10-11As shown, the button 41 includes a connecting rod 411 and a ring portion 413. The connecting rod 411 and the ring portion 413 are integrally formed. The fixing member 43 is provided with a through hole 432 that is adapted to the connecting rod 411. The silicone 42 is provided with a through hole 421 that corresponds to the connecting rod 411. The through hole 421 and the through hole 432 are vertically aligned. During installation, the button 41 is moved through the lifting hole 113 and the connecting rod 411 is passed through the through hole 421 and the through hole 432 in sequence to achieve the initial positioning connection of the three. The end of the connecting rod 411 that passes through the through hole 432 and extends out of the through hole 432 is fused to achieve the fixed connection of the three.
[0051] Furthermore, such as Figure 10 As shown, the pressing part 422 is provided with a receiving cavity 424 adapted to the annular part 413 for receiving and positioning the annular part 413.
[0052] Preferably, such as Figure 12 As shown, the bottom of the annular portion 413 is also provided with an alignment rod 412 extending toward the lower shell 12 and arranged parallel to the connecting rod 411. The silicone 42 is provided with an alignment hole 425 that is adapted to the alignment rod 412. During installation, the alignment rod 412 of the button 41 is aligned and inserted into the alignment hole 425 of the silicone 42. The cooperation between the alignment rod 412 and the alignment hole 425 strictly restricts the circumferential rotation freedom of the button 41 relative to the silicone 42, ensuring that the button 41 will not twist under any pressing state, improving the stability and accuracy of the operation feel, and protecting the silicone 42 from damage by torsional load. This design also facilitates installation and saves installation time.
[0053] The following is a detailed explanation of the working principle of this utility model;
[0054] When the stator 22 is energized, it generates an alternating magnetic field, which drives the two movers 23 to move back and forth in opposite directions under the constraint and reset action of their respective elastic elements 24. The upper shell 11 is provided with mounting holes 111 corresponding to the moving parts of the movers 23. A viewing window 3 is fixedly installed in the mounting hole 111. The viewing window 3 is made of transparent material, and the user can observe the movement state of the linear motor 2 inside through the viewing window 3. The bracket 21 includes a clearance part 211. The clearance part 211 is adapted to the shape of the viewing window 3 and does not obstruct the movement of the movers 23, ensuring that the bracket 21 itself will not obstruct the line of sight for observing the movement trajectory of the movers 23 through the viewing window 3. The movement state of the movers 23 can be easily observed through the viewing window 3 and the clearance part 211 of the bracket 21.
[0055] The innovation of this utility model lies in the installation hole and the embedded transparent viewing window in the upper shell, which allows users to observe the working status of the mover without disassembling the shell. The bracket is equipped with a clearance part whose outline matches the shape of the viewing window, completely eliminating the obstruction of the view of the mover's movement trajectory by the bracket and ensuring that the mover's entire path is exposed to the observation window; enabling rapid fault diagnosis such as jam detection, improving product maintainability, and maintaining the integrity of the shell.
[0056] 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.
[0057] 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 hair trimmer, characterized in that, The device includes a housing (1) and a linear motor (2). The housing (1) includes a detachably connected upper shell (11) and a lower shell (12). The linear motor (2) includes a bracket (21), a stator (22), a mover (23), and an elastic element (24). The mover (23) is connected to the bracket (21) through the elastic element (24) and is suspended relative to the stator (22). The stator (22) is fixedly connected to the bracket (21) and drives the two movers (23) to move back and forth alternately. The upper shell (11) is provided with a mounting hole (111) corresponding to the moving part (23). A viewing window (3) is fixedly installed in the mounting hole (111). The bracket (21) includes a clearance part (211). The clearance part (211) is adapted to the shape of the viewing window (3) and does not obstruct the movement of the moving part (23). The movement state of the moving part (23) can be easily observed through the viewing window (3) and the clearance part (211) of the bracket (21).
2. The hair trimmer according to claim 1, characterized in that, The perspective window (3) is circular.
3. The hair trimmer according to claim 2, characterized in that, The recess (211) is arc-shaped to match the shape of the viewing window (3) and is symmetrically designed along the central axis L1.
4. The hair trimmer according to claim 3, characterized in that, The viewing window (3) includes a fixing ring (31) and a transparent part (32). The upper shell (11) is provided with an annular groove (112) around the mounting hole (111) that is adapted to the transparent part (32). The transparent part (32) is fixedly connected to the annular groove (112) by the fixing ring (31).
5. A hair trimmer according to claim 4, characterized in that, The fixing ring (31) includes a support leg (311), the annular groove (112) is provided with a through hole (1121) adapted to the support leg (311), and the transparent part (32) is provided with a through hole (321) adapted to the support leg (311). The support leg (311) passes through the through hole (321) and the through hole (1121) in sequence to fix the transparent part (32) to the annular groove (112).
6. A hair trimmer according to claim 5, characterized in that, The fixing ring (31) includes a ring connecting block (312), and the transparent part (32) is provided with an annular groove (322) adapted to the ring connecting block (312), and the height of the annular groove (322) is consistent with the height of the ring connecting block (312).
7. The hair trimmer according to claim 1, characterized in that, The upper shell (11) is also provided with a lifting hole (113), and a button (4) is provided in the lifting hole (113). The button (4) includes a button (41), silicone (42) and a fixing member (43). The fixing member (43) fixes the silicone (42) and the button (41) to the upper shell (11).
8. A hair trimmer according to claim 7, characterized in that, The upper shell (11) is provided with a second support leg (114) extending toward the lower shell (12), and the fixing member (43) is provided with a connecting hole (431) adapted to the second support leg (114).
9. A hair trimmer according to claim 8, characterized in that, The button (41) includes a connecting rod (411) and a ring (413). The fixing member (43) is provided with a three-hole (432) adapted to the connecting rod (411). The silicone (42) is provided with a four-hole (421) corresponding to the connecting rod (411). The four-hole (421) and the three-hole (432) are vertically aligned.
10. A hair trimmer according to claim 9, characterized in that, The bottom of the annular portion (413) is also provided with a positioning rod (412) extending toward the lower shell (12) and arranged parallel to the connecting rod (411), and the silicone (42) is provided with a positioning hole (425) adapted to the positioning rod (412).