Dual frequency vibrating motor

Abstract

The application discloses a dual-frequency vibration motor. The dual-frequency vibration motor comprises a shell, a vibrator accommodated in the shell, an elastic component elastically supporting the vibrator and a stator driving the vibrator to vibrate. The vibrator comprises a first vibrator and a second vibrator which are arranged at intervals along a first direction. The elastic component comprises a first elastic component elastically supporting the first vibrator and a second elastic component elastically supporting the second vibrator. The stator interacts with the vibrator to generate driving force to drive the first vibrator to vibrate along a second direction and to drive the second vibrator to vibrate along a third direction. The second direction and the third direction are both perpendicular to the first direction. The natural frequency of the first elastic component is not equal to the natural frequency of the second elastic component. The dual-frequency vibration motor can output two different vibrations near two different frequencies.

Description

[Technical Field]

[0001] This invention relates to the field of vibration motors, and more specifically to a dual-frequency vibration motor. [Background Technology]

[0002] As components providing tactile feedback, vibration motors are increasingly widely used in electronic devices. Due to the nature of their structure, most vibration motors have only one resonant frequency and can only provide vibration with a limited bandwidth. Currently, a few dual-frequency vibration motors can provide vibration at two frequencies, but the two vibrations are coupled to some extent.

[0003] Therefore, it is necessary to improve existing vibration motors to avoid the aforementioned defects. [Summary of the Invention]

[0004] The purpose of this invention is to provide a dual-frequency vibration motor that can output two different vibrations near two different frequencies.

[0005] The technical solution of the present invention is as follows: A dual-frequency vibration motor includes a housing with a receiving space, an oscillator housed within the housing, an elastic component that elastically supports the oscillator, and a stator that drives the oscillator to vibrate. The oscillator includes a first oscillator and a second oscillator spaced apart along a first direction. The elastic component includes a first elastic component that elastically supports the first oscillator and a second elastic component that elastically supports the second oscillator. The stator is disposed between the first oscillator and the second oscillator. The stator has a first magnetic element. Both the first oscillator and the second oscillator have second magnetic elements that are opposite to and spaced apart from the first magnetic element. One of the first magnetic element and the second magnetic element is a coil, and the other is a magnet. The coil and the magnet can interact to generate a driving force to drive the first oscillator to vibrate along a second direction and to drive the second oscillator to vibrate along a third direction. Both the second direction and the third direction are perpendicular to the first direction. The natural frequency of the first elastic component is not equal to the natural frequency of the second elastic component.

[0006] Preferably, both the first oscillator and the second oscillator include the second magnet and a counterweight, with the second magnet fixed to the counterweight.

[0007] Preferably, the second magnetic component is fixed to the counterweight by a connector, the connector comprising a main body portion perpendicular to the first direction and located between the counterweight and the second magnetic component, a first extension portion extending from the main body portion away from the second magnetic component and fixed to the counterweight, and a second extension portion extending from the main body portion away from the counterweight and fixed to the second magnetic component.

[0008] Preferably, the connector is a magnetic conductor.

[0009] Preferably, the axis of the coil is parallel to the first direction.

[0010] The present invention also provides a dual-frequency vibration motor, comprising a housing having a receiving space, an oscillator housed within the housing, an elastic component elastically supporting the oscillator, and a stator driving the oscillator to vibrate. The oscillator comprises a first oscillator and a second oscillator spaced apart along a first direction; the elastic component comprises a first elastic component elastically supporting the first oscillator and a second elastic component elastically supporting the second oscillator; the stator comprises a first stator and a second stator disposed on opposite sides of the oscillator along the first direction; both the first stator and the second stator have a first magnetic element; both the first oscillator and the second oscillator have a second magnetic element spaced apart from and opposite to the first magnetic element; wherein one of the first magnetic element and the second magnetic element is a coil, and the other is a magnet; the coil and the magnet can interact to generate a driving force to drive the first oscillator to vibrate along a second direction and to drive the second oscillator to vibrate along a third direction; both the second direction and the third direction are perpendicular to the first direction; and the natural frequency of the first elastic component is not equal to the natural frequency of the second elastic component.

[0011] Preferably, both the first oscillator and the second oscillator include the second magnet and a counterweight, with the second magnet fixed to the counterweight.

[0012] Preferably, the second magnetic component is fixed to the counterweight by a connector, the connector comprising a main body portion perpendicular to the first direction and located between the counterweight and the second magnetic component, and two opposite ends of the main body portion.

[0013] Preferably, the connector is a magnetic conductor, and both the first stator and the second stator include the first magnetic element and a magnetic plate disposed on the side of the first magnetic element away from the oscillator.

[0014] Preferably, the axis of the coil is parallel to the first direction.

[0015] Compared with related technologies, the beneficial effects of the dual-frequency vibration motor provided by the present invention are as follows: by setting two independent oscillators with different natural frequencies inside the same housing, two different vibrations can be output near two different frequencies under the action of different driving signals, thereby greatly expanding the application scenarios of the vibration motor and providing a richer vibration experience. [Attached Image Description]

[0016] Figure 1 An exploded view of a first embodiment of the dual-frequency vibration motor provided by the present invention;

[0017] Figure 2 for Figure 1 The diagram shows the assembled structure of the dual-frequency vibration motor.

[0018] Figure 3 for Figure 2 The cross-sectional view of the dual-frequency vibration motor along the AA direction is shown.

[0019] Figure 4 for Figure 2 The cross-sectional view of the dual-frequency vibration motor along the BB direction is shown.

[0020] Figure 5 for Figure 2 The cross-sectional view of the dual-frequency vibration motor along the CC direction is shown.

[0021] Figure 6 This is a cross-sectional view of a second embodiment of the dual-frequency vibration motor provided by the present invention.

Detailed Implementation Methods

[0022] 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.

[0023] Example 1

[0024] Please refer to the following: Figures 1 to 5 The dual-frequency vibration motor includes a housing 1 with a receiving space, an oscillator 3 housed within the housing 1, an elastic component 5 that elastically supports the oscillator 3, and a stator 7 that drives the oscillator 3 to vibrate. The elastic component 5 and the stator 7 are fixedly connected to the housing 1.

[0025] The oscillator 3 includes a first oscillator 3A and a second oscillator 3B arranged at intervals along the first direction X.

[0026] Both the first oscillator 3A and the second oscillator 3B include a counterweight 31 and a second magnet 33 fixed to the counterweight 31.

[0027] The second magnetic component 33 can be directly fixed to the counterweight 31 or indirectly fixed to the counterweight 31. In this embodiment, the second magnetic component 33 is fixed to the counterweight 31 by a connector 9.

[0028] The connector 9 includes a main body portion 91 perpendicular to the first direction X and located between the counterweight 31 and the second magnet 33, a first extension portion 93 formed and fixed to the counterweight 31 by bending and extending from the main body portion 91 in a direction away from the second magnet 33, and a second extension portion 95 formed and fixed to the second magnet 33 by bending and extending from the main body portion 91 in a direction away from the counterweight 31.

[0029] like Figure 1 As shown, the main body 91 is rectangular, and two first extensions 93 are formed by bending and extending from two opposite ends of the main body 91, and the counterweight 31 is located between the two first extensions 93. Two second extensions 95 are formed by bending and extending from the other opposite ends of the main body 91, and the second magnet 33 is located between the two second extensions 95.

[0030] The elastic component 5 includes a first elastic component 5A that elastically supports the first oscillator 3A and a second elastic component 5B that elastically supports the second oscillator 3B. Specifically, both the first elastic component 5A and the second elastic component 5B include a first fixing part 51 fixedly connected to the counterweight 31, a second fixing part 53 fixedly connected to the housing 1, and an elastic arm 55 connecting the first fixing part 51 and the second fixing part 53. The counterweight 31 and the first fixing part 51, as well as the housing 1 and the second fixing part 53, are fixedly welded together using welding tabs 57.

[0031] The natural frequency of the first elastic component 5A is not equal to the natural frequency of the second elastic component 5B.

[0032] The stator 7 is disposed between the first oscillator 3A and the second oscillator 3B. The stator 7 has a first magnetic element 71. The second magnetic elements 33 of the first oscillator 3A and the second oscillator 3B are both opposite to the first magnetic element 71 and are spaced apart (that is, the first magnetic element 71 is located between the first oscillator 3A and the second magnetic elements 33 of the second oscillator 3B).

[0033] One of the first magnetic component 71 and the second magnetic component 33 is a coil, and the other is a magnet. The coil and the magnet can interact to generate a driving force to drive the first oscillator 3A to vibrate along the second direction Y and the second oscillator 3B to vibrate along the third direction Z. Both the second direction Y and the third direction Z are perpendicular to the first direction X. Since the natural frequency of the first elastic component 5A is not equal to the natural frequency of the second elastic component 5B, under the action of different driving signals (i.e., the coil is energized to generate a driving force between the coil and the magnet), the first oscillator 3A and the second oscillator 3B can output two different vibrations near two different frequencies, thereby greatly expanding the application scenarios of the vibration motor and providing a richer vibration experience. For example, the natural frequencies of the first elastic component 5A and the second elastic component 5B can be set such that the driving force generated between the coil and the magnet drives the first oscillator 3A to produce low-frequency vibration and drives the second oscillator 3B to produce high-frequency vibration.

[0034] In this embodiment, the first magnetic component 71 is a coil, and the second magnetic component 33 is a magnet. The second direction Y and the third direction Z can form an angle between 0° and 180°, meaning the second direction Y and the third direction Z can be in the same direction, perpendicular, or otherwise. It is understood that in other embodiments, the first magnetic component 71 can also be a magnet.

[0035] In this embodiment, the second direction Y is perpendicular to the third direction Z.

[0036] It should be noted that the angle between the second direction Y and the third direction Z is related to the magnetic field formed by the magnets of the first oscillator 3A and the second oscillator 3B.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, the second magnetic component 33 includes two first permanent magnets 331 spaced apart and a second permanent magnet 333 sandwiched between the two first permanent magnets 331. Specifically, the two first permanent magnets 331 of the first oscillator 3A are spaced apart along a direction perpendicular to the first direction X and the second direction Y, and the two first permanent magnets 331 of the second oscillator 3B are spaced apart along a direction perpendicular to the first direction X and the third direction Z.

[0038] The magnetic pole distribution of the first permanent magnet 331 and the second permanent magnet 333 can be as follows: Figure 4 As shown.

[0039] In this embodiment, the connector 9 is a magnetic conductor. By making the connector 9 a magnetic conductor, it is beneficial to improve the interaction force between the coil (when the coil is energized) and the magnet.

[0040] In this embodiment, the axis of the coil is parallel to the first direction X.

[0041] Example 2

[0042] Please see Figure 6 The difference between Embodiment 2 and Embodiment 1 lies only in that: the stator 7 includes a first stator 7A and a second stator 7B disposed on opposite sides of the oscillator 3 along the first direction X. Both the first stator 7A and the second stator 7B include a first magnetic element 71 disposed opposite to and spaced apart from the oscillator 3, and a magnetic guide plate 73 disposed on the side of the first magnetic element 71 away from the oscillator 3. The first magnetic element 71 is a coil.

[0043] The oscillator 3 includes a first oscillator 3A' and a second oscillator 3B' arranged at intervals along the first direction X.

[0044] Both the first oscillator 3A' and the second oscillator 3B' have a second magnetic element 33 that is opposite to and spaced apart from the first magnetic element 71. The second magnetic element 33 is a magnet. Specifically, the magnetic pole distribution of the first permanent magnet 331 and the second permanent magnet 333 can be as follows: Figure 6 As shown.

[0045] It is understood that in other embodiments, the first magnetic element 71 may also be a magnet, and correspondingly, the second magnetic element 33 may be a coil; the first stator 7A and the second stator 7B may each include only the first magnetic element 71.

[0046] It should be noted that when the first magnetic component 71 is a coil or a magnet, the magnetic plate 73 can increase the magnetic field strength of the first magnetic component 71; in Embodiment 1 and Embodiment 2, the second magnetic component can be configured to include only two spaced first permanent magnets.

[0047] Compared with related technologies, the beneficial effects of the dual-frequency vibration motor provided by the present invention are as follows: by setting two independent oscillators with different natural frequencies inside the same housing, two different vibrations can be output near two different frequencies under the action of different driving signals, thereby greatly expanding the application scenarios of the vibration motor and providing a richer vibration experience.

[0048] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A dual-frequency vibration motor, comprising a housing having a receiving space, an oscillator housed within the housing, an elastic component elastically supporting the oscillator, and a stator driving the oscillator to vibrate, characterized in that: The oscillator includes a first oscillator and a second oscillator spaced apart along a first direction. The elastic component includes a first elastic component that elastically supports the first oscillator and a second elastic component that elastically supports the second oscillator. The stator is disposed between the first oscillator and the second oscillator. The stator has a first magnetic element. Both the first oscillator and the second oscillator have second magnetic elements that are opposite to and spaced apart from the first magnetic element. One of the first magnetic element and the second magnetic element is a coil, and the other is a magnet. The coil and the magnet can interact to generate a driving force to drive the first oscillator to vibrate along a second direction and to drive the second oscillator to vibrate along a third direction. Both the second direction and the third direction are perpendicular to the first direction. The natural frequency of the first elastic component is not equal to the natural frequency of the second elastic component. The axis of the coil is parallel to the first direction; The magnet includes two first permanent magnets spaced apart and a second permanent magnet sandwiched between the two first permanent magnets. The magnetization direction of the first permanent magnets is parallel to the first direction, and the magnetization direction of the second permanent magnet is perpendicular to the first direction. The two first permanent magnets of the first oscillator are spaced apart along the second direction, and the two first permanent magnets of the second oscillator are spaced apart along the third direction.

2. The dual-frequency vibration motor according to claim 1, characterized in that: Both the first oscillator and the second oscillator include the second magnet and a counterweight, with the second magnet fixed to the counterweight.

3. The dual-frequency vibration motor according to claim 2, characterized in that: The second magnetic component is fixed to the counterweight by a connector. The connector includes a main body portion perpendicular to the first direction and located between the counterweight and the second magnetic component, a first extension portion that bends and extends from the main body portion away from the second magnetic component and is fixed to the counterweight, and a second extension portion that bends and extends from the main body portion away from the counterweight and is fixed to the second magnetic component.

4. The dual-frequency vibration motor according to claim 3, characterized in that: The connector is a magnetic conductor.

5. A dual-frequency vibration motor, comprising a housing having a receiving space, an oscillator housed within the housing, an elastic component elastically supporting the oscillator, and a stator driving the oscillator to vibrate, characterized in that: The oscillator includes a first oscillator and a second oscillator spaced apart along a first direction. The elastic component includes a first elastic component that elastically supports the first oscillator and a second elastic component that elastically supports the second oscillator. The stator includes a first stator and a second stator disposed on opposite sides of the oscillator along the first direction. Both the first stator and the second stator have a first magnetic element. Both the first oscillator and the second oscillator have a second magnetic element that is opposite to and spaced apart from the first magnetic element. One of the first magnetic element and the second magnetic element is a coil, and the other is a magnet. The coil and the magnet can interact to generate a driving force to drive the first oscillator to vibrate along a second direction and to drive the second oscillator to vibrate along a third direction. Both the second direction and the third direction are perpendicular to the first direction. The natural frequency of the first elastic component is not equal to the natural frequency of the second elastic component. The axis of the coil is parallel to the first direction; The magnet includes two first permanent magnets spaced apart and a second permanent magnet sandwiched between the two first permanent magnets. The magnetization direction of the first permanent magnets is parallel to the first direction, and the magnetization direction of the second permanent magnet is perpendicular to the first direction. The two first permanent magnets of the first oscillator are spaced apart along the second direction, and the two first permanent magnets of the second oscillator are spaced apart along the third direction.

6. The dual-frequency vibration motor according to claim 5, characterized in that: Both the first oscillator and the second oscillator include the second magnet and a counterweight, with the second magnet fixed to the counterweight.

7. The dual-frequency vibration motor according to claim 6, characterized in that: The second magnetic component is fixed to the counterweight by a connector, the connector including a main body portion perpendicular to the first direction and located between the counterweight and the second magnetic component, and two opposite ends of the main body portion.

8. The dual-frequency vibration motor according to claim 7, characterized in that: The connector is a magnetic conductor, and both the first stator and the second stator include the first magnetic element and a magnetic plate disposed on the side of the first magnetic element away from the oscillator.

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