High-strength driver applied to linear motor device

Abstract

A high-strength driving element applied to a linear motor device comprises a driving element body, swing arm parts are formed on the two sides of the driving element body, and elastic pieces are arranged on the sides, away from the center of the driving element, of the swing arm parts. The elastic piece is provided with a body part, side face elastic parts arranged on the two sides of the body part and two upper elastic parts connected with the corresponding side face elastic parts and the swing arm part respectively, the thickness of the upper elastic parts is larger than that of the body part, and when the swing arm part swings, the upper elastic parts are not prone to falling off when the swing arm part swings. When the driving sub-body is deformed, the elastic piece deforms, so that the stress is concentrated on the body part, and the body part is long, so that the body part is not easy to break due to stress concentration when being stressed and twisted for a long time, and the strength of the driving sub-body is further improved.

Description

Technical Field

[0001] This invention relates to the field of hair cutting equipment technology, and more specifically to a high-strength drive unit applied to a linear motor device. Background Technology

[0002] In the prior art, the drive unit in the linear motor device used in shavers is usually injection molded as a single piece. The elastic components on both sides of the drive unit are also injection molded onto the drive unit. Since the stress generated during the swing of the drive unit will be concentrated on the elastic components on both sides, the elastic components are prone to fatigue fracture after long-term use. Therefore, there is an urgent need for a high-strength drive unit structure. Summary of the Invention

[0003] In view of this, the present invention provides a high-strength actuator for use in linear motor devices.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A high-strength drive unit for use in a linear motor device includes a drive unit body, with swing arm portions formed on both sides of the drive unit body. An elastic element is provided on the side of the swing arm portion away from the center of the drive unit. The elastic element has a main body portion, side elastic portions provided on both sides of the main body portion, and two upper elastic portions respectively connected to the corresponding side elastic portions and swing arm portions. The thickness of the upper elastic portions is greater than the thickness of the main body portion.

[0005] Preferably, the portion of the elastic element surface located between the upper elastic portion and the side elastic portion forms an upper chamfer structure, and the portion of the elastic element surface located between the body portion and the side elastic portion forms a lower chamfer structure.

[0006] Preferably, the arc length of the upper chamfer structure is 1 / 2 of the arc length of the lower chamfer structure.

[0007] Preferably, the thickness of the two ends of the side elastic portion gradually decreases in the direction of the upper elastic portion and the direction of the body portion, respectively.

[0008] Preferably, the vertical distance from the top of the upper elastic part of the elastic member to the bottom of the body part of the elastic member is H, and the maximum vertical distance between the side elastic parts on both sides of the body part is L1.

[0009] Preferably, the top of the drive subbody is recessed to form a cutter head connecting surface, the vertical distance from the cutter head connecting surface to the top of the upper elastic part of the elastic element is H2, the vertical distance from the top of the upper elastic part of the elastic element to the horizontal center line of the side elastic part is H3, H3=H1*(1 / 2), and the height difference between H3 and H2 is Δh.

[0010] Preferably, the maximum vertical distance L1 between the side elastic portions on both sides of the main body is greater than the vertical distance H1 from the top of the upper elastic portion of the elastic member to the bottom of the main body of the elastic member. Preferably, L1 is three times the value of H1.

[0011] Preferably, the length of the body portion of the elastic element is greater than the sum of the lengths of the two upper elastic portions.

[0012] The beneficial effects of the present invention are as follows: by setting the thickness of the upper elastic part to be greater than the thickness of the main body, the elastic element deforms when the swing arm swings, so that the stress is concentrated on the main body. Since the main body is longer, it is not easy to break due to stress concentration when subjected to torsion for a long time, thereby improving the strength of the drive sub-body. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Appendix Figure 1 This is a schematic diagram of the design structure; Appendix Figure 2 This is another schematic diagram of the design; Appendix Figure 3 For the appendix Figure 2 Sectional view at point AA. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] This invention provides the following technical solution: As attached Figure 1-3As shown, this invention discloses a high-strength drive unit for a linear motor device, comprising a drive unit body 1, with swing arm portions 2 formed on both sides of the drive unit body 1. An elastic element 3 is disposed on the side of the swing arm portion 2 away from the center of the drive unit. The elastic element 3 has a body portion 4, side elastic portions 5 disposed on both sides of the body portion 4, and two upper elastic portions 6 respectively connected to the corresponding side elastic portions 5 and swing arm portions 2. The thickness of the upper elastic portions 6 is greater than the thickness of the body portion 4. Specifically, in this design, by setting the thickness of the upper elastic portions 6 to be greater than the thickness of the body portion 4, the elastic element 3 deforms when the swing arm portion swings, thus concentrating stress on the body portion 4. Because the body portion 4 is longer, it is less likely to break due to stress concentration when subjected to prolonged torsion, thereby improving the strength of the drive unit body.

[0018] Furthermore, the portion of the surface of the elastic element 3 located between the upper elastic portion 6 and the side elastic portion 5 forms an upper chamfer structure 8, and the portion of the surface of the elastic element 3 located between the body portion 4 and the side elastic portion 5 forms a lower chamfer structure 9. Specifically, in this embodiment, by setting the upper chamfer structure 8 and the lower chamfer structure 9, not only is the shape of the elastic element 3 optimized, but stress can also be better dispersed and buffered under torsional force, and the product has better flowability during injection molding, resulting in less stress at the bending point of the molded product.

[0019] Furthermore, the arc length of the upper chamfer structure 8 is half the arc length of the lower chamfer structure 9. Specifically, in this embodiment, since the thickness of the upper elastic part 6 is greater than the thickness of the body part 4, setting the arc length of the upper chamfer structure 8 to half the arc length of the lower chamfer structure 9 can better match the stress distribution of the elastic element 3. This allows the elastic element 3 to better disperse and buffer stress when the drive is subjected to torque, thereby improving the strength and durability of the elastic element 3.

[0020] Furthermore, the thickness of the two ends of the side elastic portion 5 gradually decreases towards the upper elastic portion 6 and the body portion 4, respectively. Specifically, in this embodiment, since the thickness of the upper elastic portion 6 is greater than the thickness of the body portion 4, the thickness of the side elastic portion 5 at the end near the upper elastic portion 6 is greater than the thickness at the end near the body portion 4. This better supports the upper elastic portion 6 and prevents it from excessively deforming or breaking under stress. Simultaneously, the gradual decrease in thickness of the side elastic portion 5 at the end near the body portion 4 allows for a smoother transmission of torque to the body portion 4, avoiding stress concentration that could damage the body portion 4. This design not only improves the overall strength of the drive unit but also optimizes its stress distribution, making the drive unit more stable and reliable during use.

[0021] Specifically, the thickness ratio between the upper elastic part 6, the side elastic part 5, and the body part 4 is 0.75:1:0.63. Therefore, when the thickness of the upper elastic part 6 is set to be greater than the thickness of the body part 4, the thickness of the side elastic part 5 is properly configured, which can effectively support the upper elastic part 6 without causing an excessive increase in the overall weight and cost of the elastic element 3. This ensures that the elastic element 3 can achieve the best deformation and stress dispersion effect when subjected to force, thereby significantly improving the overall performance and durability of the drive unit.

[0022] In one step, the vertical distance from the top of the upper elastic part 6 of the elastic member 3 to the bottom of the body part 4 of the elastic member 3 is H1, and the maximum vertical distance between the side elastic parts 5 on both sides of the body part 4 is L1. Specifically, in this embodiment, by setting the vertical distance H1 and the maximum vertical distance L1 to a specific ratio or range, the deformation effect and stress distribution of the elastic member 3 can be further optimized. When the swing arm 2 swings, this design can more effectively absorb and disperse stress, reduce the degree of torsion of the body part 4, and maintain sufficient elastic restoring force to ensure the stable operation of the linear motor device.

[0023] Furthermore, the top of the drive sub-body 1 is recessed to form a cutter head connecting surface 7. The vertical distance from the cutter head connecting surface 7 to the top of the upper elastic part 6 of the elastic member 3 is H2, and the vertical distance from the top of the upper elastic part 6 of the elastic member 3 to the horizontal center line of the side elastic part 5 is H3. H3 = H1 * (1 / 2), and the height difference between H3 and H2 is Δh. Specifically, in this embodiment, the closer the vertical distance between H3 and H2, the more concentrated the torque and spring force generated by the product are on a straight line, thus reducing the oscillating torque loss and improving the overall efficiency and performance of the linear motor device.

[0024] In one embodiment, H1 is 7.8 mm, L1 is 23.4 mm, H3 is 3.9 mm, and Δh is 0.15 mm. Specifically, in this embodiment, by setting H1, L1, H3, and Δh to these specific numerical dimensions, the elastic element 3 can produce more uniform and controllable deformation when the swing arm 2 swings, thereby more effectively absorbing and dispersing stress and avoiding structural damage caused by stress concentration. At the same time, this design also ensures that the linear motor device has sufficient rigidity and stability during operation, thus improving its overall performance and reliability.

[0025] Furthermore, L1 > H1, meaning L1 is three times H1. Specifically, in this embodiment, L1 is approximately three times H1. This structural arrangement increases the strength of the swing arm, making it more stable and less prone to deformation during swinging.

[0026] Furthermore, the length of the body portion 4 of the elastic element 3 is greater than the sum of the lengths of the two upper elastic portions 6. Specifically, in this embodiment, the length design of the body portion 4 results in a more uniform stress distribution, effectively reducing the risk of damage to the body portion 4 due to stress concentration, even under high-intensity driving. In addition, this design enhances the overall stability of the elastic element 3, enabling it to maintain excellent elasticity and resilience even under long-term, repeated mechanical stress. Simultaneously, the length advantage of the body portion 4 is also reflected in its supporting effect on the side elastic portions 5. When subjected to external forces, the side elastic portions 5 can better disperse and absorb stress by utilizing the length advantage of the body portion 4, thereby further improving the overall strength and durability of the drive sub-body.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the 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 invention. Therefore, the 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 high-strength drive unit for use in a linear motor device, comprising a drive unit body (1), wherein swing arm portions (2) are formed on both sides of the drive unit body (1), and an elastic element (3) is provided on the side of the swing arm portion (2) away from the center of the drive unit, characterized in that: The elastic element (3) has a body part (4), side elastic parts (5) disposed on both sides of the body part (4), and two upper elastic parts (6) respectively connected to the corresponding side elastic parts (5) and the swing arm part (2). The thickness of the upper elastic parts (6) is greater than the thickness of the body part (4).

2. The high-strength drive unit for a linear motor device according to claim 1, characterized in that: The portion of the surface of the elastic element (3) between the upper elastic portion (6) and the side elastic portion (5) forms an upper chamfer structure (8), and the portion of the surface of the elastic element (3) between the body portion (4) and the side elastic portion (5) forms a lower chamfer structure (9).

3. The high-strength drive unit for a linear motor device according to claim 2, characterized in that: The arc length of the upper chamfer structure (8) is 1 / 2 of the arc length of the lower chamfer structure (9).

4. The high-strength drive unit for a linear motor device according to claim 1, characterized in that: The thickness of the two ends of the side elastic part (5) gradually decreases in the direction of the upper elastic part (6) and the direction of the body part (4), respectively.

5. The high-strength drive unit for a linear motor device according to claim 1, characterized in that: The vertical distance from the top of the upper elastic part (6) of the elastic member (3) to the bottom of the body part (4) of the elastic member (3) is H1, and the maximum vertical distance between the side elastic parts (5) on both sides of the body part (4) is L1.

6. The high-strength drive unit for a linear motor device according to claim 4, characterized in that: The top of the drive subbody (1) sinks down to form a cutter head connecting surface (7). The vertical distance from the cutter head connecting surface (7) to the top of the upper elastic part (6) of the elastic member (3) is H2. The vertical distance from the top of the upper elastic part (6) of the elastic member (3) to the horizontal center line of the side elastic part (5) is H3. H3 = H1*(1 / 2). The height difference between H3 and H2 is Δh.

7. The high-strength drive unit for a linear motor device according to claim 4, characterized in that: The maximum vertical distance L1 between the side elastic portions (5) on both sides of the main body (4) is greater than the vertical distance H1 from the top of the upper elastic portion (6) of the elastic member (3) to the bottom of the main body (4) of the elastic member (3).

8. The high-strength drive unit for a linear motor device according to claim 4, characterized in that: The value of L1 is three times that of H1.

9. The high-strength drive unit for use in a linear motor device according to claim 1, characterized in that: The length of the body part (4) of the elastic element (3) is greater than the sum of the lengths of the two upper elastic parts (6).

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