Linear motor with composite force arm

Abstract

The utility model relates to a linear motor with a composite force arm, which comprises a stator, a rotor and the composite force arm, the composite force arm is respectively connected with the rotor and the stator; the composite force arm comprises a metal elastic arm and a damping elastic arm; the metal elastic arm and the damping elastic arm jointly act on the stator and the rotor; the fixing positions and the number of the metal elastic arms and the damping elastic arms are adjustable. According to the utility model, the stopping time is obviously shortened while the relatively low acceleration loss is maintained, the acceleration performance is greatly improved, and the excellent comprehensive performance is shown; the requirement of the system for damping can be flexibly adjusted, the acceleration amplitude, the transient response efficiency, the start-stop efficiency and the priority of the frequency band width can be adjusted according to actual requirements, and flexible design is achieved.

Description

Technical Field

[0001] This utility model relates to the field of linear motor technology, and in particular to a linear motor with a compound force arm. Background Technology

[0002] In current touchscreen consumer electronics products, such as mobile phones, tablets, and handheld game consoles, linear motors are commonly used for vibration and haptic feedback. Linear motors with damped elastic arms offer significantly better instantaneous braking compared to traditional linear motors with metal elastic arms. Another advantage of linear motors with damped elastic arms is their wider frequency band, allowing for a richer vibration experience; however, their maximum acceleration is significantly reduced. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a linear motor with a composite force arm, which combines a metal elastic arm and a damping elastic arm to significantly shorten the stopping time and greatly improve acceleration performance while maintaining relatively low acceleration loss.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a linear motor with a composite lever arm, including a stator and a mover, and also including a composite lever arm; the composite lever arm is connected to the mover and the stator respectively; the composite lever arm includes a metal elastic arm and a damping elastic arm; the metal elastic arm and the damping elastic arm act together on the stator and the mover; the fixed position and number of the metal elastic arm and the damping elastic arm are adjustable.

[0005] Furthermore, the damping elastic arm of this invention is disposed on the middle side of the linear motor, and the metal elastic arm is disposed on the end side of the linear motor.

[0006] Furthermore, the damping elastic arm of this utility model has a first horizontal part, a second horizontal part, and a vertical part; the first horizontal part is connected to the mover, the second horizontal part is connected to the stator, and the vertical part connects the first horizontal part and the second horizontal part.

[0007] Furthermore, the metal elastic arm of this utility model includes a first connecting part, a bending part, and a second connecting part; the first connecting part is connected to the moving part, the second connecting part is connected to the stator, and the bending part connects the first connecting part and the second connecting part.

[0008] Furthermore, the present invention describes two damping elastic arms, which are respectively disposed on the middle side of the linear motor.

[0009] Furthermore, the present invention describes four metal elastic arms, which are respectively disposed on the end side of the linear motor.

[0010] Furthermore, the damping elastic arm and the metal elastic arm described in this utility model are either separately configured or integrated.

[0011] The beneficial effects of this utility model are that it solves the defects existing in the background technology. While maintaining a relatively low acceleration loss, the composite lever arm significantly shortens the stopping time and achieves a substantial improvement in acceleration performance, demonstrating excellent comprehensive performance. It can flexibly adjust the system's damping requirements and adjust the priority of acceleration amplitude, transient response efficiency, start-stop efficiency, and bandwidth according to actual needs, thus achieving flexible design. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 Exploded view;

[0014] Figure 3 These are acceleration performance diagrams of metal lever arms, damped lever arms, and composite lever arm motors under the same signal.

[0015] Figure 4 This is a comparison chart of measured sweep frequency impedance curves of motors with metal lever arms and damped lever arms;

[0016] In the figure: 1. Moving element; 2. Stator; 3. Damping elastic arm; 4. Metal elastic arm; 31. First horizontal part; 32. Second horizontal part; 33. Vertical part; 41. First connecting part; 42. Second connecting part; 43. Bending part. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0018] like Figures 1-4 The linear motor shown includes a stator 2 and a mover 1, and also includes a composite lever arm; the composite lever arm is connected to the mover 1 and the stator 2 respectively; the composite lever arm includes a metal elastic arm 4 and a damping elastic arm 3; the metal elastic arm 4 and the damping elastic arm 3 work together on the stator and the mover; the number of metal elastic arms and damping elastic arms can be adjusted proportionally according to actual needs, and the fixed positions of the metal elastic arms and damping elastic arms can also be changed according to actual needs.

[0019] In this embodiment, the damping elastic arm 3 is disposed on the middle side of the linear motor, and the metal elastic arm 4 is disposed on the end side of the linear motor.

[0020] There are two damping elastic arms 3, which are respectively disposed on the middle side of the linear motor. The damping elastic arm 3 has a first horizontal part 31, a second horizontal part 32 and a vertical part 33. The first horizontal part 31 is connected to the mover 1, the second horizontal part 32 is connected to the stator 2, and the vertical part 33 connects the first horizontal part 31 and the second horizontal part 32.

[0021] There are four metal elastic arms 4, which are respectively disposed on the end side of the linear motor. The metal elastic arm 4 includes a first connecting part 41, a bending part 43 and a second connecting part 42. The first connecting part 41 is connected to the mover 1, the second connecting part 42 is connected to the stator 2, and the bending part 43 connects the first connecting part 41 and the second connecting part 42.

[0022] Two types of elastic arms can be like Figures 1-2 The two structures shown are fixed to the mover and stator respectively using a separate structure. According to other embodiments, the metal elastic arm and the damping elastic arm can also be combined into an integral structure by means of bonding or injection molding vulcanization, and then fixed to the stator and mover.

[0023] This solution combines a metal elastic arm and a damping elastic arm. Calculations comparing a motor with a composite lever arm and one with a metal elastic lever arm revealed that the acceleration Gpp decreased from 17.1 to 15.7, a reduction of only 8%. Therefore, the stopping time was defined as the time required for the acceleration to decay to 10% of its maximum amplitude. Under this standard, the composite lever arm exhibited a significant advantage in instantaneous stopping, with a stopping time of only 0.016 seconds, nearly half that of the 0.03 seconds required by the metal elastic lever arm motor.

[0024] Furthermore, a comparative test was conducted on the horn of the pure damping elastic arm. The results showed that the horn's stopping time was 0.012 seconds. Although the stopping time of the composite arm was 33% longer, the composite arm achieved a significant 100% improvement in acceleration, outperforming the pure damping motor. In conclusion, the composite arm significantly shortened the stopping time while maintaining relatively low acceleration loss and achieved a substantial improvement in acceleration performance, demonstrating excellent overall performance.

[0025] The above description is only a specific embodiment of the present utility model. Various examples and illustrations do not constitute a limitation on the substantive content of the present utility model. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the description without departing from the essence and scope of the utility model.

Claims

1. A linear motor having a compound force arm comprising a stator and a mover, characterized by: The composite force arm is connected with the mover and the stator respectively, and comprises a metal elastic arm and a damping elastic arm which jointly act on the stator and the mover.

2. A linear motor with a compound force arm as claimed in claim 1, characterized in that: The damping elastic arm is arranged at the middle side of the linear motor, and the metal elastic arm is arranged at the end side of the linear motor.

3. A linear motor having a compound force arm as defined in claim 1, characterized in that: The damping elastic arm has a first horizontal part, a second horizontal part and a vertical part, the first horizontal part is connected with the mover, the second horizontal part is connected with the stator, and the vertical part connects the first horizontal part and the second horizontal part.

4. A linear motor having a compound force arm as defined in claim 1, characterized in that: The metal elastic arm comprises a first connecting part, a bending part and a second connecting part, the first connecting part is connected with the mover, the second connecting part is connected with the stator, and the bending part connects the first connecting part and the second connecting part.

5. A linear motor having a compound force arm as defined in claim 3, characterized in that: The damping elastic arm is two, and the two damping elastic arms are arranged at the middle side of the linear motor respectively.

6. A linear motor having a compound force arm as defined in claim 4, characterized in that: The metal elastic arm is four, and the four metal elastic arms are arranged at the end side of the linear motor respectively.

7. A linear motor having a compound force arm as defined in claim 1, characterized in that: The damping elastic arm and the metal elastic arm are arranged in a split type or an integrated type.

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