Magnetic drive structure for a hair cutting device

Abstract

A magnetic drive structure for a hair cutting device includes a split injection port on the outer mold. The split injection port is located at the position where the elastic element and the swing arm meet. After the liquid required for molding the elastic element is injected from the corresponding split injection port, the two liquid streams flow along the mold channel and converge. This design incorporates a reinforcing structure on the elastic element. The distances from both sides of the reinforcing structure to the two positions where the elastic element and the swing arm meet are equal. The purpose of adding the reinforcing structure is to change the convergence point of the two liquid streams to the reinforcing structure, preventing them from converging at any point on the side wall of the elastic element. This prevents weld lines from forming on the elastic element. This design ensures that the two liquid streams can be evenly and fully fused when they converge, avoiding weld lines forming on the main structure of the elastic element. Furthermore, due to the reinforcing structure, even if weld lines are formed, they will be located on the reinforcing structure, not on the main body of the elastic element.

Description

Technical Field

[0001] This utility model relates to the field of hair trimming technology, specifically to a magnetic drive structure applied to a hair cutting device. Background Technology

[0002] In the prior art, during the molding process, the elastic component of the magnetically driven hair cutting device forms a weld line due to the convergence of two liquid materials. As a result, the elastic component is prone to breakage at the weld line due to external forces during long-term use, especially during high-frequency hair cutting operations, thus affecting the stability and service life of the magnetic drive structure. Summary of the Invention

[0003] In view of this, the present invention provides a magnetic drive structure for use in hair cutting devices.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A magnetic drive structure for a hair cutting device includes a drive unit and a drive assembly. The drive assembly is disposed on the drive unit. A swing gap is formed on the drive unit, which divides the upper part of the drive unit into at least two moving parts. Each moving part has a swing arm formed on both sides. An elastic part is provided on the outer side of the two swing arms on the same side to connect them and form a linkage. The two ends of the elastic part are connected to the corresponding swing arms as a whole, and they merge in the middle to form a whole. A reinforcing structure is provided at a position equidistant from the joint of the elastic part and the swing arms at both ends. The volume of the reinforcing structure is larger than the cross-sectional area of ​​the joint of the elastic parts in the middle.

[0006] Preferably, the elastic element is arranged in a ring structure, and the sum of the cross-sectional area of ​​the middle confluence of the elastic element and the cross-sectional area between the reinforcing structures is greater than 5 mm².

[0007] Preferably, at least one elastic element is provided, and the reinforcing structure is provided on the inner wall of the elastic element. The reinforcing structure has an elastic element connecting portion and a reinforcing portion, and the two ends of the elastic element connecting portion are respectively connected to the inner wall of the elastic element and the reinforcing portion.

[0008] Preferably, the reinforcing part has a concave arc-shaped surface, and planar structures are provided on both sides of the arc-shaped surface.

[0009] Preferably, two elastic elements are provided, including an inner ring elastic element and an outer ring elastic element. The inner ring elastic element is disposed inside the outer ring elastic element. The reinforcing structure includes an inner ring reinforcing structure disposed on the inner wall of the inner ring elastic element near the moving part and an outer ring reinforcing structure disposed on the side wall of the outer ring elastic element away from the moving part. The inner ring reinforcing structure and the outer ring reinforcing structure are respectively provided with corresponding middle confluence points of the inner ring elastic element and the middle confluence points of the outer ring elastic element.

[0010] Preferably, the cross-sectional area between the inner ring reinforcing structure and the inner ring elastic element is greater than 5 mm².

[0011] Preferably, the sum of the cross-sectional area between the inner ring reinforcing structure and the inner ring elastic element and the cross-sectional area between the outer ring reinforcing structure and the outer ring elastic element is greater than the sum of the cross-sectional areas at the midpoint of the inner ring elastic element and the midpoint of the outer ring elastic element.

[0012] Preferably, the drive assembly includes a mounting base, a coil frame, a magnet body, and a magnet. A mounting groove is formed between the moving parts. Fixed parts connecting the two moving parts are provided on the opposite side walls of the mounting groove. The mounting base is connected to the fixed parts. The coil frame, the magnet body, and the magnet are all disposed in the mounting groove. The magnet is connected to the moving part. The coil frame is disposed on the magnet body.

[0013] The beneficial effects of this invention are as follows: After the molten material required for molding the elastic component is injected from the corresponding branch injection port, the two streams of molten material flow along the mold channel and converge. This design incorporates a reinforcing structure on the elastic component, with equal distances between the two sides of the reinforcing structure and the two points where the elastic component connects to the swing arm. The purpose of adding the reinforcing structure is to relocate the convergence point of the two streams of molten material to the reinforcing structure, preventing them from converging at any point on the side wall of the elastic component. This prevents weld lines from forming on the elastic component. The equal distance ensures that the convergence point of the two streams of molten material must be on the reinforcing structure. If the distances are unequal, the convergence point will form on any outer side wall of the elastic component. This design ensures that the two streams of molten material can be uniformly and fully fused when they converge, preventing weld lines from forming on the main structure of the elastic component. Furthermore, due to the reinforcing structure, even if weld lines form, they will be located on the reinforcing structure, not on the main body of the elastic component. The weld lines resulting from the mixing of the liquid and material are transferred to the reinforcing structure, preventing them from appearing on the main body of the elastic component. This improves the overall strength and durability of the elastic component and reduces the risk of breakage. Furthermore, the reinforcing structure enhances the stability of the elastic component under external forces, allowing it to better maintain its shape and elasticity, thereby improving the reliability and service life of the entire magnetic drive structure. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Appendix Figure 2 This is a schematic diagram of the driving substructure;

[0017] Appendix Figure 3 This is a schematic diagram showing the connection between the driver and the driver component in another embodiment;

[0018] Appendix Figure 4 For the appendix Figure 3 Schematic diagram of the driving force in the middle;

[0019] Appendix Figure 5 For the appendix Figure 2 Top view;

[0020] Appendix Figure 6 For the appendix Figure 5 Sectional view at point AA;

[0021] Appendix Figure 7 For the appendix Figure 4 Top view;

[0022] Appendix Figure 8 For the appendix Figure 7 Sectional view at point BB. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] This utility model provides the following technical solution:

[0026] As attached Figure 1-8As shown, this utility model discloses a magnetic drive structure for a hair cutting device, including a drive element 1 and a drive assembly 2. The drive assembly 2 is disposed on the drive element 1. The drive element 1 has a swing gap 3, which divides the upper part of the drive element 1 into at least two moving parts 4. Each moving part 4 has a swing arm 5 formed on both sides. On the outer side of the two swing arms 5 on the same side, there is an elastic member 6 that connects them to form a linkage. The two ends of the elastic member 6 are connected to the corresponding swing arm 5 as a whole, and they merge in the middle to form a whole. A reinforcing structure 7 is provided at a position where the two ends of the elastic member 6 are equidistant from the joint of the swing arm 5. The volume of the reinforcing structure 7 is larger than the cross-sectional area of ​​the joint of the elastic member in the middle (i.e., the location of the weld line). Specifically, in this design, the external mold has a branch injection port (not shown in the figure). The branch injection port is located at the position where the elastic element and the rocker arm of the mold meet. After the liquid required for molding the elastic element is injected from the corresponding branch injection port, the two liquids flow along the mold channel and converge. In this design, a reinforcing structure 7 is set on the elastic element 6, and the distances between the two sides of the reinforcing structure 7 and the two positions where the elastic element 6 and the rocker arm 5 meet are equal. The purpose of adding the reinforcing structure is to change the confluence position of the two liquids to the reinforcing structure, so that they will not converge at any point on the side wall of the elastic part. In this way, the elastic part will not form a weld line. The equal distance is to control that the confluence of the two liquids must be on the reinforcing structure. If the distance is not equal, the confluence will be formed on any outer side wall of the elastic part. This design ensures that the two liquid streams blend evenly and fully during their convergence, preventing weld lines from forming on the main structure of the elastic component. Furthermore, due to the reinforcing structure 7, even if a weld line does form, it will be located on the reinforcing structure 7, not on the main body of the elastic component 6. The weld line resulting from the liquid flow is transferred to the reinforcing structure 7, preventing it from appearing on the main body of the elastic component 6, thereby improving the overall strength and durability of the elastic component 6 and reducing the risk of breakage. In addition, the reinforcing structure 7 enhances the stability of the elastic component 6 under external forces, allowing it to better maintain its shape and elasticity, thus improving the reliability and service life of the entire magnetic drive structure.

[0027] Specifically, each of the moving parts 4 is provided with symmetrical swing arms 5 on both sides. The magnetic field acts on the magnet at the bottom of the moving part, causing the magnet to move to one side. Without a reverse traction force, the same-pole magnetic field generated by the coil and the magnet cannot drive the magnet to move in the opposite direction. Therefore, adding an elastic element allows the moving part to reverse and reset at the moment the magnetic field switches after moving to one side under the magnet's influence. This, combined with the same-pole magnetic field formed by the exchange on the magnet, drives the magnet in the opposite direction. The symmetrical swing arms 5 help maintain balance during movement, reducing wear and fatigue caused by unbalanced forces. Furthermore, the symmetrical arrangement of the swing arms 5 provides more stable support during movement, thereby extending the service life of the entire device. This design ensures that the moving part 4 maintains good performance during long-term use, reducing the frequency of maintenance and replacement, thus extending its service life.

[0028] Furthermore, the elastic element 6 is arranged in a ring structure, and the sum of the cross-sectional area at the junction of the elastic element 6 and the cross-sectional area between the elastic element 6 and the reinforcing structure 7 is greater than 5 mm². Specifically, in this embodiment, since the reinforcing structure 7 is located at the junction of the two liquid streams, the weld line generated by the junction of the liquid streams is transferred to the reinforcing structure, ensuring that the weld line does not affect the main body of the elastic element 6, thereby further improving the performance of the elastic element 6. In addition, the ring structure of the elastic element 6 not only enhances its overall strength and stability, but also allows it to distribute force more evenly when subjected to stress, avoiding localized excessive wear or damage. The design of a cross-sectional area greater than 5 mm² between the elastic element 6 and the reinforcing structure 7 provides better load-bearing capacity and durability, maintaining good elasticity and shape stability even during long-term use.

[0029] Furthermore, at least one elastic element 6 is provided, and the reinforcing structure 7 is provided on the inner wall of the elastic element 6. The reinforcing structure 7 has an elastic element connecting portion 8 and a reinforcing portion 9. The two ends of the elastic element connecting portion 8 are respectively connected to the inner wall of the elastic element 6 and the reinforcing portion 9. Specifically, in this embodiment, the reinforcing structure 7 can transfer the weld lines on the elastic element 6, avoiding the weld lines appearing in the areas of the elastic element 6 that bear the main stress, thereby improving the mechanical properties and durability of the entire elastic element 6. The elastic element connecting portion 8 is used to connect the elastic element 6 and the reinforcing structure 7. Its design ensures that the reinforcing portion 9 can be firmly attached to the elastic element 6 and will not easily fall off due to external forces. The reinforcing portion 9 further enhances the local strength of the elastic element 6. Especially when subjected to large external impacts, the reinforcing portion 9 can effectively disperse stress and prevent the elastic element 6 from cracking due to stress concentration. This design not only improves the overall reliability of the magnetic drive structure but also extends its service life, enabling it to maintain stable performance in various complex environments.

[0030] Furthermore, the reinforcing part 9 has a concave arc-shaped surface 10, and planar structures 11 are provided on both sides of the arc-shaped surface 10. Specifically, in this embodiment, the concave arc-shaped surface 10 on the reinforcing part 9 allows the reinforcing part 9 to better disperse stress when subjected to external forces, avoiding the risk of breakage caused by stress concentration. The planar structures 11 are provided on both sides of the arc-shaped surface 9 in the horizontal direction and are in contact with the arc-shaped surface 9. This design not only enhances the structural strength of the reinforcing part 9, but also allows it to transmit force more evenly when subjected to force, further improving the overall stability and durability of the elastic element 6. In addition, the combination of the arc-shaped surface 10 and the planar structures 11 also optimizes the stress distribution of the reinforcing part 9, allowing it to deform more flexibly when subjected to external forces, thereby effectively absorbing and mitigating impact forces and protecting other components of the magnetic drive structure from damage.

[0031] In another embodiment, two elastic elements 6 are provided, including an inner ring elastic element 12 and an outer ring elastic element 13. The inner ring elastic element 12 is disposed inside the outer ring elastic element 13. The reinforcing structure 7 includes an inner ring reinforcing structure 14 disposed on the inner wall of the inner ring elastic element 12 near the moving part 4, and an outer ring reinforcing structure 15 disposed on the side wall of the outer ring elastic element 13 away from the moving part 4. Specifically, in this embodiment, by adopting a dual elastic element 6 design, namely an inner ring elastic element 12 and an outer ring elastic element 13, the stability and durability of the magnetic drive structure are further improved. The inner ring elastic element 12 is mainly responsible for close cooperation with the moving part 4 and providing necessary elastic support, while the outer ring elastic element 13 undertakes more of the protection and support role for the entire drive structure. This design not only disperses the force but also allows for a more even distribution of force across the entire structure, thus preventing excessive wear or damage at a single point. The inner ring reinforcement structure 14 and the outer ring reinforcement structure 15 reinforce the inner ring elastic element 12 and the outer ring elastic element 13, respectively. The inner ring reinforcement structure 14, located near the moving part 4, effectively enhances the connection strength between the inner ring elastic element 12 and the moving part 4, preventing loosening or detachment during long-term use. The outer ring reinforcement structure 15, located on the sidewall of the outer ring elastic element 13, enhances the overall strength and stability of the outer ring elastic element 13, enabling it to better withstand the impact and wear of the external environment. Furthermore, the junctions of the inner ring elastic element 12 and the outer ring elastic element 13 formed on the inner ring reinforcement structure 14 and the outer ring reinforcement structure 15, respectively, further ensure that weld lines do not affect the main body of the elastic element 6. These weld lines are cleverly designed into the reinforcing structure, ensuring the convergence and fusion of the molten material while avoiding any impact on the overall performance of the elastic component 6. This design not only improves the molding quality of the elastic component 6 but also further enhances its overall strength and durability.

[0032] Furthermore, the cross-sectional area between the inner ring reinforcing structure 14 and the inner ring elastic element 12, and the cross-sectional area between the outer ring reinforcing structure 15 and the outer ring elastic element 13, are greater than 5 mm². Specifically, in this embodiment, to ensure that the inner ring reinforcing structure 14 and the outer ring reinforcing structure 15 have sufficient strength and load-bearing capacity, the sum of the cross-sectional areas between the corresponding elastic elements of the inner ring reinforcing structure 14 and the outer ring reinforcing structure 15 is greater than 5 mm². This design ensures that the reinforcing structure can effectively distribute and withstand external forces, avoiding excessive deformation or damage to the elastic elements. At the same time, the larger cross-sectional area also provides better durability and stability to the reinforcing structure, maintaining good performance even during long-term use.

[0033] Furthermore, the sum of the cross-sectional areas between the inner ring reinforcing structure 14 and the inner ring elastic member 12 and the outer ring reinforcing structure 15 and the outer ring elastic member 13 is greater than the sum of the cross-sectional areas at the midpoint of the inner ring elastic member 12 and the midpoint of the outer ring elastic member 13. Specifically, in this embodiment, to ensure that the weld line does not negatively affect the overall performance of the reinforcing structure, the cross-sectional areas between the inner ring reinforcing structure 14 and the inner ring elastic member 12, and between the outer ring reinforcing structure 15 and the outer ring elastic member 13, are specially designed so that the sum of their cross-sectional areas is greater than the sum of the cross-sectional areas at the midpoint of the inner ring elastic member 12 and the midpoint of the outer ring elastic member 13. This design not only improves the strength and load-bearing capacity of the reinforcing structure, but also ensures that the force at the weld line can be effectively dispersed, avoiding localized strength reduction or damage caused by the weld line.

[0034] Furthermore, the driving assembly 2 includes a mounting base 16, a coil frame 17, a magnet body 18, and a magnet 19. A mounting groove 20 is formed between the moving parts 4. Fixing parts 21 connecting the two moving parts 4 are provided on opposite sides of the mounting groove 20. The mounting base 16 is connected to the fixing parts 21. The coil frame 17, magnet body 18, and magnet 19 are all disposed within the mounting groove 20. The magnet 19 is connected to the moving part 4, and the coil frame 17 is disposed on the magnet body 18. Specifically, in this embodiment, a wire bundle is wound on the coil frame 17. When the wire bundle is energized, an electromagnetic field is formed on the magnet body 18. The electromagnetic principle of like poles repelling and unlike poles attracting drives the magnet mounted at the bottom of the moving part to move. To achieve reciprocating motion, a Hall element is added to the circuit, causing the current direction to change at high frequency, forming a Hall effect. That is, the S and N poles of the magnetic field formed on the magnet body continuously change, thus continuously and repeatedly driving the reciprocating motion of the magnet at the bottom of the moving part. The magnet 18 and the magnet 19 generate mutual attraction or repulsion, and this change in force causes the moving part 4 to oscillate within the mounting slot 20. The mounting base 16 is securely connected to the fixed part 21, ensuring the stability and reliability of the entire drive assembly 2. The design of the fixed part 21 not only strengthens the connection between the moving parts 4 but also provides solid support for the mounting base 16. The coil frame 17 allows current to pass smoothly and generate the required magnetic field, while the magnet 18, as the main responder of the magnetic field, works together with the magnet 19 to realize the driving function of the magnetic drive structure. This design not only simplifies the drive structure but also improves its efficiency and reliability, enabling the entire hair cutting device to operate more stably and efficiently.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic drive structure for a hair cutting device, comprising a drive element (1) and a drive assembly (2), wherein the drive assembly (2) is disposed on the drive element (1), characterized in that: The drive unit (1) has a swing gap (3) which divides the upper part of the drive unit (1) into at least two moving parts (4). Each moving part (4) has a swing arm (5) on both sides. On the outer side of the two swing arms (5) on the same side, there is an elastic member (6) that connects them to form a linkage. The two ends of the elastic member (6) are connected to the corresponding swing arm (5) as a whole, and they merge in the middle to form a whole. A reinforcing structure (7) is provided at a position where the two ends of the elastic member (6) are equidistant from the joint of the swing arm (5). The volume of the reinforcing structure (7) is larger than the cross-sectional area of ​​the joint of the elastic member in the middle.

2. The magnetic drive structure for a hair cutting device according to claim 1, characterized in that: The elastic element (6) is arranged in a ring structure, and the cross-sectional area of ​​the middle junction of the elastic element (6) and the area of ​​the cross-section between the reinforcing structure (7) are greater than 5 mm².

3. The magnetic drive structure for a hair cutting device according to claim 1, characterized in that: At least one elastic element (6) is provided, and the reinforcing structure (7) is provided on the inner wall of the elastic element (6). The reinforcing structure (7) has an elastic element connecting part (8) and a reinforcing part (9). The two ends of the elastic element connecting part (8) are respectively connected to the inner wall of the elastic element (6) and the reinforcing part (9).

4. The magnetic drive structure for a hair cutting device according to claim 3, characterized in that: The reinforcing part (9) has a concave arc-shaped surface (10), and planar structures (11) are provided on both sides of the arc-shaped surface (10).

5. The magnetic drive structure for a hair cutting device according to claim 1, characterized in that: Two elastic elements (6) are provided. The elastic element (6) includes an inner ring elastic element (12) and an outer ring elastic element (13). The inner ring elastic element (12) is disposed inside the outer ring elastic element (13). The reinforcing structure (7) includes an inner ring reinforcing structure (14) disposed on the inner wall of the inner ring elastic element (12) near the moving part (4) and an outer ring reinforcing structure (15) disposed on the side wall of the outer ring elastic element (13) away from the moving part (4).

6. The magnetic drive structure for a hair cutting device according to claim 5, characterized in that: The cross-sectional area between the inner ring reinforcing structure (14) and the inner ring elastic element (12) is greater than 5 mm² when combined with the cross-sectional area between the outer ring reinforcing structure (15) and the outer ring elastic element (13).

7. The magnetic drive structure for a hair cutting device according to claim 1, characterized in that: The drive assembly (2) includes a mounting base (16), a coil frame (17), a magnet body (18), and a magnet (19). A mounting groove (20) is formed between the moving parts (4). A fixing part (21) connecting the two moving parts (4) is provided on the opposite sides of the mounting groove (20). The mounting base (16) is connected to the fixing part (21). The coil frame (17), the magnet body (18), and the magnet (19) are all arranged in the mounting groove (20). The magnet (19) is connected to the moving part (4). The coil frame (17) is arranged on the magnet body (18).

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