Linear motor module and electronic equipment

Abstract

The utility model provides a linear motor module and an electronic device wherein the linear motor module comprises a linear motor body; the magnet assembly is fixedly arranged on the linear motor body; the vibrator assembly is arranged on the linear motor body and can generate vibration relative to the linear motor body; the damping assembly is configured to enable the vibrator assembly to return to the initial position; and the residual vibration eliminating coil is wound on the damping assembly, and under the condition that the electric signal is applied to the residual vibration eliminating coil, the vibration of the vibrator assembly is restrained. According to the utility model, the oscillator assembly can rapidly enter an over-damping state, the technical effects of rapidly eliminating the residual vibration of the oscillator assembly and braking the oscillator assembly are achieved, and the technical problems in the prior art that the linear motor cannot rapidly eliminate the residual vibration and the braking duration is long are solved.

Description

Technical Field

[0001] This application relates to the field of linear motors, and more particularly to a linear motor module and electronic device. Background Technology

[0002] An LRA (Linear Resonant Actuator) linear motor typically contains a mass, spring, magnet, and wire wound around an iron core. By injecting current near the resonant frequency of the coil into the wire wound around the iron core, the Lorentz force principle is used to excite the mass and spring system to resonate and oscillate.

[0003] In the prior art, to achieve rapid braking of an LRA linear motor, the injection of positive current into the core conductor is canceled, and then a reverse current of several half-cycle multiples is applied to the core conductor to counteract the positive magnetic field, thereby accelerating the resonance of the braking mass and spring support. After a certain period of time, the motor reaches a stationary state using damping. This braking system has the following disadvantages: the magnetic field generated by the reverse current cannot exactly counteract the influence of the positive magnetic field (e.g., mechanical asymmetry, external vibration interference, etc.), resulting in the inability to quickly eliminate residual vibration, and the braking time of the LRA linear motor is long.

[0004] It is evident that linear motors in related technologies suffer from technical problems such as the inability to quickly eliminate residual vibrations and long braking durations. Utility Model Content

[0005] This application provides a linear motor module and electronic device to at least solve the technical problems of linear motors in the related art, such as the inability to quickly eliminate residual vibration and the long braking time.

[0006] According to one aspect of an embodiment of this application, a linear motor module is provided, comprising:

[0007] A linear motor body; a magnet assembly fixedly mounted on the linear motor body; an oscillator assembly mounted on the linear motor body and capable of vibrating relative to the linear motor body; a damping assembly configured to return the oscillator assembly to its initial position; and a residual vibration cancellation coil wound around the damping assembly to restrain the vibration of the oscillator assembly when an electrical signal is applied to the residual vibration cancellation coil.

[0008] Optionally, the residual vibration elimination coil is bonded and fixed to the damping assembly.

[0009] Optionally, the magnet assembly includes at least two magnets arranged along a vibration direction perpendicular to the oscillator assembly, with the oscillator assembly disposed between the two magnets.

[0010] Optionally, the oscillator assembly includes a mass block and a motor coil wound on the mass block, the mass block being connected to the linear motor body via a damping assembly.

[0011] Optionally, the damping assembly includes at least two spring supports, with a mass block connected between the at least two spring supports to cause the mass block to vibrate along the length of the spring supports.

[0012] Optionally, at least one spring support is wound with a residual vibration elimination coil, which is located at a target position in the spring support, wherein the deformation at the target position is smaller than that at other positions in the spring support.

[0013] Alternatively, the spring support may be made of a metal conductor.

[0014] Optionally, both ends of the residual vibration elimination coil and the motor coil are connected to AC drive signals.

[0015] Optionally, the mass block can be a magnetizable metal.

[0016] According to another aspect of the embodiments of this application, an electronic device is also provided, including a linear motor assembly as described in any of the foregoing embodiments.

[0017] In this embodiment, a magnet assembly, an oscillator assembly, and a damping assembly are provided on the linear motor body. A residual vibration elimination coil is wound on the damping assembly. The residual vibration elimination coil generates a magnetic field when an electrical signal is applied. The magnetic field interacts with the magnet of the magnet assembly to restrain the vibration of the damping assembly, thereby achieving the purpose of quickly bringing the oscillator assembly into an overdamped state. This achieves the technical effect of quickly eliminating the residual vibration of the oscillator assembly and stopping it, thus solving the technical problems of linear motors being unable to quickly eliminate residual vibration and having a long stopping time in related technologies. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of an optional linear motor according to an embodiment of this application.

[0021] Figure 2This is a schematic diagram of the structure of an optional linear motor according to another embodiment of this application. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0023] It is understood that the connection relationships described in this application refer to direct or indirect connections. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. For instance, A can be directly connected to C, and C can be directly connected to B, thus achieving a connection between A and B through C. It is also understood that the "A connects to B" described in this application can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0024] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0025] In the description of this application, the words "first," "second," etc., are used only to distinguish different objects and do not limit the quantity or order of execution, nor do they imply that they must be different. Furthermore, the terms "comprising" and "possessing," and any variations thereof, are intended to cover non-exclusive inclusion.

[0026] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0027] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units means two or more processing units; multiple systems means two or more systems.

[0028] Figure 1 A linear motor module provided in this application embodiment includes:

[0029] Linear motor body 1; magnet assembly 2, fixedly mounted on linear motor body 1; oscillator assembly 3, mounted on linear motor body 1 and capable of vibrating relative to linear motor body 1; damping assembly 4, configured to return oscillator assembly 3 to its initial position; residual vibration elimination coil 5, wound around damping assembly 4, which restrains the vibration of oscillator assembly 3 when an electrical signal is applied to residual vibration elimination coil 5.

[0030] The linear motor body 1 is roughly rectangular in shape. A receiving groove is formed on the linear motor body 1, and the magnet assembly 2 and the oscillator assembly 3 are disposed within the receiving groove. A damping assembly 4 is disposed between the oscillator assembly 3 and the inner wall of the linear motor body 1. The magnet assembly 2 is fixed to the linear motor body 1 and forms the stator. The oscillator assembly 3 can move relative to the linear motor body 1 to generate vibration. The damping assembly 4 is disposed between the linear motor body 1 and the oscillator assembly 3. When a driving current is applied to the oscillator assembly 3, it undergoes displacement under the influence of the magnetic field of the magnet assembly 2. The damping assembly 4 then compresses the inner wall of the linear motor body 1, creating a reciprocating motion. The damping assembly 4 is made of an elastic material. The system provides a force in the opposite direction to the movement of the oscillator assembly 3 to prevent excessive vibration amplitude during oscillation. When the oscillator assembly 3 is energized and vibrating, the residual vibration elimination coil 5 is not supplied with an electrical signal and moves with the damping assembly 4. To accelerate the oscillator assembly 3 back to its initial position and stop moving, a reverse drive current is applied to the motor coil 32 of the oscillator assembly 3 to cancel the positive electromagnetic field. An electrical signal is then applied to the residual vibration elimination coil 5, causing it to generate a force opposite to the direction of damping deformation, thus restraining the deformation of the damping assembly 4 and allowing the oscillator assembly 3 to quickly enter the damped state, achieving rapid elimination of residual vibration and braking. When an electrical signal is applied to the residual vibration elimination coil 5, a Lorentz force is generated, restraining the vibration of the damping assembly 4. Simultaneously, an alternating current is input into the residual vibration elimination coil 5, generating an alternating magnetic field. This magnetic field interacts with the magnetic field formed by the magnet assembly 2, thereby affecting the movement of the oscillator assembly 3. The residual vibration elimination coil 5 is made of a conductive material. The specific process is as follows: After being energized, the residual vibration elimination coil 5 generates a magnetic field with controllable direction and intensity around it. The direction of this magnetic field depends on the direction of the current, while the intensity depends on the magnitude of the current. The generated magnetic field interacts with the permanent magnet of the magnet assembly 2. According to Lenz's Law, this interaction generates a reverse force, suppressing the vibration of the oscillator assembly 3. Furthermore, by precisely controlling the electrical signal applied to the residual vibration elimination coil 5, the intensity and direction of the magnetic field generated by the residual vibration elimination coil 5 can be adjusted, thereby achieving real-time control of the oscillator assembly 3 and further improving the speed of residual vibration elimination. In other words, by setting the residual vibration elimination coil 5, the K (Hooke's coefficient) of the damping assembly 4 in the braking stage can be increased. Combined with the existing damping achieved by adding a reverse drive current to counteract the positive electromagnetic field, a faster entry into a stationary state can be achieved. The introduction of a larger K value can partially reduce the influence of the residual magnetic field in the first stage of braking, where the reverse current and the positive current cannot exactly cancel each other out. Furthermore, the surface of the residual vibration eliminator coil 5 needs to be insulated: the outside of the residual vibration eliminator coil 5 is usually covered with insulating material, such as enameled wire or plastic sheath, to prevent short circuits and other electrical faults.

[0031] Since the number of turns of the residual vibration elimination coil 5 is positively correlated with the magnetic field strength, in order to ensure the efficient operation of the residual vibration elimination coil 5, selecting an appropriate number of turns can reduce resistance loss while ensuring the magnetic field strength. Furthermore, the material of the residual vibration elimination coil is typically high-conductivity copper wire to reduce resistance loss and improve efficiency. In this embodiment, by fixing the residual vibration elimination coil 5 on the damping component 4, when an electrical signal is applied to the residual vibration elimination coil 5, the deformation of the damping component 4 is restrained by the magnetic field interaction with the magnet component 2, thereby allowing the oscillator component 3 to quickly enter the damping state, achieving the effect of quickly eliminating residual vibration. This restrains the vibration of the oscillator component 3, achieving the technical effect of quickly eliminating and stopping the residual vibration of the oscillator component 3. Furthermore, it effectively reduces mechanical wear and extends the service life of the linear motor module; in addition, it improves the user experience by providing clearer and more precise tactile feedback, enhancing the user's interactive experience; it can be widely used in portable electronic devices, gaming devices, medical devices, and other fields, possessing high versatility and flexibility. This solves the technical problems of linear motors being unable to quickly eliminate residual vibrations and having long braking durations in related technologies.

[0032] As an optional implementation, the magnet assembly 2 includes two magnets arranged along the vibration direction perpendicular to the oscillator assembly 3, respectively disposed on both sides of the oscillator assembly 3. The placement of the magnets on both sides can increase the magnetic field strength around the oscillator assembly 3.

[0033] As an optional implementation, the oscillator assembly 3 includes a mass block 31 and a motor coil 32 wound around the mass block 31. The mass block 31 is connected to the linear motor body 1 through a damping assembly 4. When the motor coil 32 is energized, under the action of the magnetic field of the magnet assembly 2, it drives the mass block 31 to vibrate relative to the linear motor body 1, compressing the damping assembly 4, causing the oscillator assembly 3 to reciprocate. In this embodiment, the two ends of the motor coil 32 are connected to an AC drive signal. When the motor coil 32, located in the magnetic field of the magnet assembly 2, is energized, it generates a Lorentz force, which drives the mass block 31 to move on the linear motor body 1, compressing the damping assembly 4. When it is necessary to stop the vibration of the motor coil 32, a reverse drive current is applied to the motor coil 32 to cancel the positive electromagnetic field, and an electrical signal is applied to the residual vibration elimination coil 5. This causes the residual vibration elimination coil 5 to restrain the deformation of the damping assembly 4 through its interaction with the magnetic field of the magnet assembly 2, thereby allowing the oscillator assembly 3 to quickly enter the damped state, achieving the effect of quickly eliminating residual vibration and stopping. Optionally, the mass block 31 is a magnetizable metal. By using a magnetizable metal, the mass block 31 can better couple with the magnet assembly 2 in the linear motor module, thereby improving energy transfer efficiency and enabling the linear motor module to generate greater thrust with less current.

[0034] As an optional implementation, the damping assembly 4 includes at least two spring supports 41, with a mass block 31 connected between the at least two spring supports 41, so that the mass block 31 vibrates along the length direction of the spring supports 41. Under the action of the elastic force of the spring supports 41, the mass block 31 reciprocates on the linear motor body 1. That is, the mass block 31 is disposed between at least two spring supports 41. In order to achieve stable vibration, the number of spring supports 41 on both sides of the mass block 31 is generally the same.

[0035] like Figure 2 As shown, in one optional implementation, at least one residual vibration elimination coil 5 is wound and fixed on at least one spring bracket 41. To improve the effect of eliminating residual vibration, at least one residual vibration elimination coil 5 can be wound on each spring bracket 41, so that when at least two residual vibration elimination coils 5 are energized, at least two magnetic fields can be generated to further improve the effect of eliminating residual vibration. Alternatively, two or more residual vibration elimination coils 5 can be wound on each spring bracket 41. Furthermore, the number of residual vibration elimination coils 5 wound on each spring bracket 41 can also be different. No specific limitation is made on the number here.

[0036] As an optional implementation, the residual vibration elimination coil 5 is located at a target position in the spring bracket 41, wherein the deformation at the target position is smaller than that at other positions in the spring bracket 41. That is, the target position is the position in the spring bracket 41 with the smallest deformation. Generally, when the spring bracket 41 deforms, the deformation gradually decreases from the middle position towards both ends; therefore, the target position is the two ends of the spring bracket 41.

[0037] Furthermore, the size and shape of the residual vibration elimination coil 5 can be matched with the overall structure of the linear motor to ensure compactness and good thermal management. The linear motor module can also be equipped with a control system: for example, a drive circuit that can quickly respond to and precisely control the electrical signal applied to the residual vibration elimination coil 5. In addition, to accurately eliminate residual vibration, a vibration state monitoring sensor (such as an accelerometer or displacement sensor) can be used to monitor the vibration state of the mass block 31 and dynamically adjust the current direction of the residual vibration elimination coil 5 based on the feedback signal, achieving closed-loop control. To improve the efficiency of residual vibration elimination, the operating frequency of the residual vibration elimination coil 5 can be matched with the resonant frequency of the mass block 31 to maximize the effect of residual vibration elimination.

[0038] As an alternative implementation, such as the linear motor described above, the spring support 41 uses a metal conductor. This can increase the strength of the magnetic field generated after the residual vibration elimination coil 5 is energized, further improving the efficiency of residual vibration elimination.

[0039] According to another aspect of the embodiments of this application, an electronic device is also provided, including a linear motor module as described in any of the foregoing embodiments. Electronic devices applying the linear motor module in the foregoing embodiments may include, but are not limited to, traditional haptic feedback systems, for example, other fields requiring precise vibration control: Smartphones and tablets: for button feedback, notification reminders, etc., providing a clearer, vibration-free haptic experience. Game controllers: enhancing haptic feedback in games, reducing unnecessary vibration interference, and improving immersion. Wearable devices: such as smartwatches and fitness trackers, for notification and interactive feedback, providing a comfortable user experience. Medical devices: for rehabilitation training equipment, surgical robots, etc., providing precise haptic feedback to ensure operational safety and accuracy. Precision instruments: in applications requiring precise vibration control, such as microscopes and laser cutting machines, residual vibration elimination coils can significantly improve the stability and precision of the equipment. By controlling the current of the residual vibration elimination coil 5 in real time, the vibration of the oscillator assembly can be quickly suppressed, avoiding prolonged residual vibration and improving the system's response speed and accuracy.

[0040] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0041] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A linear motor module, characterized in that, include: Linear motor body; A magnet assembly is fixedly mounted on the linear motor body; An oscillator assembly is disposed on the linear motor body and can vibrate relative to the linear motor body; A damping component is configured to return the oscillator assembly to its initial position; An aftershock suppression coil is wound around the damping assembly. When an electrical signal is applied to the aftershock suppression coil, it restrains the vibration of the oscillator assembly.

2. The linear motor module according to claim 1, characterized in that: The residual vibration elimination coil is bonded and fixed to the damping assembly.

3. The linear motor module according to claim 1, characterized in that, The magnet assembly includes at least two magnets arranged perpendicular to the vibration direction of the oscillator assembly, and the oscillator assembly is disposed between the two magnets.

4. The linear motor module according to any one of claims 1-3, characterized in that, The oscillator assembly includes a mass block and a motor coil wound on the mass block, and the mass block is connected to the linear motor body through the damping assembly.

5. The linear motor module according to claim 4, characterized in that, The damping assembly includes at least two spring supports, with the mass block connected between the at least two spring supports to cause the mass block to vibrate along the length of the spring supports.

6. The linear motor module according to claim 5, characterized in that, At least one of the spring supports is wound and fixed with the residual vibration elimination coil, the residual vibration elimination coil being located at a target position in the spring support, wherein the deformation at the target position is less than that at other positions in the spring support other than the target position.

7. The linear motor module according to claim 5, characterized in that: The spring support is made of metal conductor.

8. The linear motor module according to claim 4, characterized in that: Both ends of the residual vibration elimination coil and the motor coil are connected to AC drive signals.

9. The linear motor module according to claim 4, characterized in that: The mass block is a magnetizable metal.

10. An electronic device, characterized in that, Includes the linear motor module as described in any one of claims 1 to 9.

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