Vibration devices and electronic equipment

Abstract

The present invention discloses a vibration device and an electronic device. The vibration device includes: a metal part, a first piezoelectric part, a second piezoelectric part, a permanent magnet, an electromagnet, and a control module. The control module generates a first control signal and a second control signal. The first piezoelectric part contracts according to the first control signal, and the second piezoelectric part extends according to the first control signal, so that the metal part bends in the first direction; the first piezoelectric part extends according to the second control signal, and the second piezoelectric part contracts according to the second control signal, thereby controlling the metal part to bend in the second direction. The control module also generates an electromagnetic control signal. The electromagnet generates an electromagnetic field according to the electromagnetic control signal, and the permanent magnet controls the bending degree of the metal part according to the electromagnetic field, thereby achieving an increase in the amplitude. The vibration device of this embodiment can controllably increase the amplitude, so that the metal part can be used in electronic equipment with large amplitude and force requirements.

Description

Technical Field

[0001] The present invention relates to the field of vibration application technology, and in particular to a vibration device and electronic equipment. Background Art

[0002] Currently, piezoelectric materials are crystalline materials that generate a voltage across their terminals when subjected to pressure. Correspondingly, piezoelectric materials deform when polarized in an electric field. Piezoelectric vibrators, made from piezoelectric materials, are widely used in small, precision devices that don't require large amplitudes.

[0003] In related technologies, electronic devices such as piezoelectric speakers, piezoelectric bone conduction headphones, piezoelectric hearing aids, and piezoelectric tactile sensors require a vibrating device with large amplitude and force. However, the amplitude of the piezoelectric vibrator cannot meet the amplitude requirements of these electronic devices. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a vibration device that can increase the amplitude of a piezoelectric vibrator, thereby enabling metal parts to be used in electronic devices with large amplitude and force requirements.

[0005] The present invention also provides an electronic device having the vibration device.

[0006] A vibration device according to a first embodiment of the present invention includes:

[0007] Metal parts;

[0008] a first piezoelectric element, wherein the first piezoelectric element is disposed on a first side surface of the metal element;

[0009] a second piezoelectric element, the second piezoelectric element being disposed on a second side surface of the metal element; wherein the second side surface is a side surface of the metal element away from the first piezoelectric element;

[0010] a permanent magnet, the permanent magnet being disposed on the metal part;

[0011] an electromagnet, the electromagnet being arranged opposite to the permanent magnet;

[0012] a control module, the control module being electrically connected to the metal member, the first piezoelectric member, the second piezoelectric member, and the electromagnet, respectively, and the control module being configured to alternately generate a first signal and a second signal, wherein the first signal comprises a first control signal and an electromagnetic control signal, and the second signal comprises a second control signal and the electromagnetic control signal; wherein the polarity of the first control signal is opposite to that of the second control signal;

[0013] The first piezoelectric element is configured to contract according to a first control signal, and the second piezoelectric element is configured to extend according to the first control signal, so that the metal element bends in a first direction; the first piezoelectric element is configured to extend according to a second control signal, and the second piezoelectric element is configured to contract according to the second control signal, so that one end of the metal element bends in a second direction;

[0014] The electromagnet is used to generate an electromagnetic field according to the electromagnetic control signal, and the permanent magnet is used to control the bending degree of the metal part according to the electromagnetic field.

[0015] The vibration device according to an embodiment of the present invention has at least the following beneficial effects: a control module generates a first control signal, causing the first piezoelectric element to contract and the second piezoelectric element to extend in response to the first control signal, thereby bending the metal part in a first direction. The control module also generates a second control signal, causing the first piezoelectric element to extend and the second piezoelectric element to contract in response to the second control signal, thereby controlling the bending of the metal part in a second direction. The control module also generates an electromagnetic control signal, causing the electromagnet to generate an electromagnetic field based on the electromagnetic control signal, and the permanent magnet to control the bending degree of the metal part based on this electromagnetic field. After the control module applies an AC signal of the same frequency to the electromagnet, when one end of the metal part is pressed downward, the electromagnet applies an attractive force to the metal part, causing it to press downward more deeply; when one end of the metal part is tilted upward, the electromagnet applies a repulsive force to the metal part, causing it to tilt upward more, thereby increasing the amplitude. The vibration device of this embodiment can controllably increase the amplitude, thereby enabling the metal part to be used in electronic devices with high amplitude and force requirements. At the same time, the vibration device of this embodiment reduces the energy loss of the vibration device by combining piezoelectric actuation and electromagnetic actuation.

[0016] According to some embodiments of the present invention, the vibration device further comprises:

[0017] an amplitude detection module, the amplitude detection module being connected to the metal part and being used to detect the amplitude of the metal part;

[0018] A filter module is used to be electrically connected to the control module, the electromagnet, and the amplitude detection module respectively, and the filter module is used to control the voltage of the electromagnetic control signal according to the amplitude.

[0019] According to some embodiments of the present invention, the filtering module includes:

[0020] a filter, the filter being electrically connected to the control module and the amplitude detection module respectively, and the filter being configured to filter the electromagnetic control signal according to the amplitude;

[0021] An amplifier is used to be electrically connected to the filter, the amplitude detection module, and the electromagnet respectively, and the amplifier is used to control the voltage of the electromagnetic control signal according to the amplitude.

[0022] According to some embodiments of the present invention, the control module includes: a first port and a second port; wherein the first port is used to electrically connect to the first piezoelectric component and the second piezoelectric component respectively, and the second port is used to electrically connect to the metal component.

[0023] According to some embodiments of the present invention, the first piezoelectric element and the second piezoelectric element each include:

[0024] Two pole bodies, both of which are provided with a fixing portion, are connected to each other through the fixing portion, wherein one of the pole bodies is used to be electrically connected to the control module, and the other pole body is used to be connected to one side of the metal part.

[0025] According to some embodiments of the present invention, the material of the first piezoelectric element and the material of the second piezoelectric element are both lead-free piezoelectric ceramics.

[0026] According to some embodiments of the present invention, the vibration device further comprises:

[0027] A first bracket is arranged at one end of the metal component; wherein the permanent magnet is arranged at the other end of the metal component.

[0028] According to some embodiments of the present invention, the vibration device further comprises:

[0029] A second bracket is arranged in the middle of the metal part; wherein the permanent magnet is arranged on the circumference of the metal part.

[0030] An electronic device according to an embodiment of the second aspect of the present invention includes:

[0031] The vibration device according to the first embodiment of the present invention.

[0032] The electronic device according to the embodiment of the present invention has at least the following beneficial effects: the electronic device increases the amplitude of the piezoelectric vibrator by adopting the vibration device, thereby enabling the metal part to be applied to electronic devices with large amplitude and force requirements.

[0033] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0035] Figure 1 is a schematic diagram of a specific embodiment of the vibration device of the present invention;

[0036] Figure 2 It is a structural schematic diagram of a specific embodiment of the metal member, the first piezoelectric member, and the second piezoelectric member of the present invention;

[0037] Figure 3 is a structural schematic diagram of a specific embodiment of the first piezoelectric element or the second piezoelectric element of the present invention;

[0038] Figure 4 FIG. 4 is a schematic diagram of another specific embodiment of the vibration device of the present invention.

[0039] Reference numerals:

[0040] The metal component 100 , the first piezoelectric component 200 , the second piezoelectric component 300 , the permanent magnet 400 , the electromagnet 500 , the control module 600 , the first bracket 700 , and the second bracket 800 . DETAILED DESCRIPTION

[0041] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0043] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0044] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0045] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] Currently, piezoelectric materials are crystalline materials that generate a voltage across their terminals when subjected to pressure. Correspondingly, piezoelectric materials deform when polarized in an electric field. Piezoelectric vibrators, made from piezoelectric materials, are widely used in small, precision devices that don't require large amplitudes.

[0047] In related technologies, electronic devices such as piezoelectric speakers, piezoelectric bone conduction headphones, piezoelectric hearing aids, and piezoelectric tactile sensors require a vibrating device with large amplitude and force. However, the amplitude of the piezoelectric vibrator cannot meet the amplitude requirements of these electronic devices.

[0048] like Figure 1 As shown, an embodiment of the present invention provides a vibration device, which includes: a metal part 100, a first piezoelectric part 200, a second piezoelectric part 300, a permanent magnet 400, an electromagnet 500, and a control module 600. The first piezoelectric part 200 is arranged on the first side of the metal part 100; the second piezoelectric part 300 is arranged on the second side of the metal part 100, wherein the second side is a side of the metal part 100 away from the first piezoelectric part 200; the permanent magnet 400 is arranged at one end of the metal part 100 and connected; the electromagnet 500 is arranged opposite to the permanent magnet 400; the control module 600 is used to be electrically connected to the metal part 100, the first piezoelectric part 200, the second piezoelectric part 300, and the electromagnet 500 respectively, and the control module 600 is used to alternately generate a first signal and a second signal, the first signal includes a first control signal and an electromagnetic control signal, and the second signal includes a second control signal, Electromagnetic control signal; wherein the polarity of the first control signal is opposite to the polarity of the second control signal; the first piezoelectric element 200 is used to perform a contraction operation according to the first control signal, and the second piezoelectric element 300 is used to perform an extension operation according to the first control signal, so that the metal element 100 is bent in the first direction; the first piezoelectric element 200 is used to perform an extension operation according to the second control signal, and the second piezoelectric element 300 is used to perform a contraction operation according to the second control signal, so that one end of the metal element 100 is bent in the second direction; the electromagnet 500 is used to generate an electromagnetic field according to the electromagnetic control signal, and the permanent magnet 400 is used to control the degree of bending of the metal element 100 according to the electromagnetic field.

[0049] Specifically, refer to Figure 1, the first piezoelectric component 200 is arranged above the metal component 100, and the lower surface of the first piezoelectric component 200 is in contact with the upper surface of the metal component 100. The second piezoelectric component 300 is arranged below the metal component 100, and the upper surface of the second piezoelectric component 300 is in contact with the lower surface of the metal component 100. The materials, structures and specifications of the first piezoelectric component 200 and the second piezoelectric component 300 are the same. The control module 600 is electrically connected to the metal component 100, the first piezoelectric component 200, the second piezoelectric component 300, the electromagnet 500 and the electromagnet 500 respectively. The control module 600 generates a first signal and a second signal, wherein the first signal includes a first control signal and an electromagnetic control signal, and the second signal includes a second control signal and an electromagnetic control signal, and the polarity of the first control signal is opposite to that of the second control signal. When the control module 600 generates a first control signal, the first piezoelectric element 200 contracts after receiving the first control signal, and the second piezoelectric element 300 extends after receiving the first control signal; when the control module 600 generates a second control signal, the first piezoelectric element 200 extends after receiving the second control signal, and the second piezoelectric element 300 contracts after receiving the second control signal. Figure 2 When the first piezoelectric element 200 contracts and the second piezoelectric element 300 expands, the center portion of the metal member 100 bends downward, meaning both ends of the metal member 100 bend upward. Correspondingly, when the first piezoelectric element 200 expands and the second piezoelectric element 300 contracts, the center portion of the metal member 100 bends upward, meaning both ends of the metal member 100 bend downward. The control module 600 alternately generates first and second signals, causing the first and second piezoelectric elements 200 and 300 to cause the metal member 100 to bend, thereby causing the metal member 100 to vibrate.

[0050] Reference Figure 1The permanent magnet 400 is positioned at the right end of the metal part 100, and the electromagnet 500 is positioned directly below the permanent magnet 400. The control module 600 is electrically connected to the electromagnet 500 and generates an electromagnetic control signal. Upon receiving the electromagnetic control signal, the electromagnet 500 generates an electromagnetic field. When the end of the metal part 100 connected to the permanent magnet 400 bends upward (i.e., the control module 600 generates a first control signal), the magnetic field generated by the electromagnet 500 exerts an upward repulsive force on the permanent magnet 400, thereby increasing the degree of upward bending of the end of the metal part 100. When the end of the metal part 100 connected to the permanent magnet 400 bends downward (i.e., the control module 600 generates a second control signal), the magnetic field generated by the electromagnet 500 exerts a downward attractive force on the permanent magnet 400, thereby increasing the degree of downward bending of the end of the metal part 100. The permanent magnet 400 moves upward or downward depending on the direction of the magnetic field, thereby controlling the degree of bending of the end of the metal part 100 connected to the permanent magnet 400. Since the vibration amplitude of the metal member 100 depends on the bending degree of the metal member 100 , the vibration amplitude of the metal member 100 can be increased by the above method.

[0051] According to the vibration device of an embodiment of the present invention, an electromagnetic control signal is generated by the control module 600, the electromagnet 500 generates an electromagnetic field based on the electromagnetic control signal, and the permanent magnet 400 controls the bending degree of the metal part 100 based on the electromagnetic field, thereby achieving an increase in amplitude. The vibration device of this embodiment can controllably increase the amplitude, thereby enabling the metal part 100 to be used in electronic devices with high amplitude and force requirements. At the same time, the vibration device of this embodiment reduces the energy loss of the vibration device by combining piezoelectric actuation and electromagnetic actuation.

[0052] In some specific embodiments of the present invention, the vibration device further includes an amplitude detection module and a filtering module. The amplitude detection module is connected to the metal part 100 and is used to detect the amplitude of the metal part 100. The filtering module is electrically connected to the control module 600, the electromagnet 500, and the amplitude detection module, and is used to control the voltage of the electromagnetic control signal based on the amplitude.

[0053] Specifically, the amplitude detection module is connected to the metal part 100, and the amplitude detection module can be selected as an amplitude sensor. The amplitude detection module can detect the amplitude of the metal part 100 when it vibrates, and the amplitude data detected by the amplitude detection module is received by the filtering module. Among them, the specific connection method between the amplitude detection module and the metal part 100 can be adjusted according to actual needs. When the amplitude data indicates that the metal part 100 is in resonance, the electric power output of the first piezoelectric part 200 and the second piezoelectric part 300 is large. At this time, the filtering module reduces the voltage of the electromagnetic control signal to reduce the electric power of the electromagnet 500, so that the entire vibration device maintains low power consumption. When the amplitude data indicates that the metal part 100 is in non-effective vibration, the filtering module increases the voltage of the electromagnetic control signal to increase the electric power of the electromagnet 500, thereby controlling the vibration frequency band of the metal part 100 to be smoother.

[0054] In some specific embodiments of the present invention, the filtering module includes a filter and an amplifier. The filter is electrically connected to the control module 600 and the amplitude detection module, respectively, and is used to filter the electromagnetic control signal based on the amplitude. The amplifier is electrically connected to the filter, the amplitude detection module, and the electromagnet 500, respectively, and is used to control the voltage of the electromagnetic control signal based on the amplitude.

[0055] Specifically, the filter is electrically connected to the control module 600. After receiving the electromagnetic control signal, the filter filters the specific frequency band of the electromagnetic control signal to achieve a filtering effect on the electromagnetic control signal. The amplifier is electrically connected to the filter. The amplifier receives the electromagnetic control signal after the filtering operation is completed, and the amplitude data detected by the amplitude detection module is received by the filtering module. When the amplitude data indicates that the metal part 100 is in resonance, the electric power output of the first piezoelectric part 200 and the second piezoelectric part 300 is large. At this time, the amplifier reduces the voltage of the electromagnetic control signal to reduce the electric power of the electromagnet 500, thereby maintaining low power consumption for the entire vibration device. When the amplitude data indicates that the metal part 100 is in non-effective vibration, the amplifier increases the voltage of the electromagnetic control signal to increase the electric power of the electromagnet 500, thereby controlling the vibration frequency band of the metal part 100 to be smoother.

[0056] like Figure 1 As shown, in some specific embodiments of the present invention, the control module includes: a first port and a second port. The first port is used to electrically connect to the first piezoelectric element 200 and the second piezoelectric element 300 respectively, and the second port is used to electrically connect to the metal element 100.

[0057] Specifically, the control module 600 includes a first port and a second port. The first piezoelectric element 200 and the second piezoelectric element 300 are both electrically connected to the first port, and the metal element 100 is electrically connected to the second port. For example, when the control module 600 generates a first control signal, the first port is a positive port and the second port is a negative port; when the control module 600 generates a second control signal, the first port is a negative port and the second port is a positive port. Figure 1 The first port of the control module 600 is respectively connected to the first piezoelectric component 200 and the second piezoelectric component 300, the lower surface of the first piezoelectric component 200 is connected to the upper surface of the metal component 100, the upper surface of the second piezoelectric component 300 is connected to the lower surface of the metal component 100, and the metal component 100 is then electrically connected to the second port of the control module 600, thereby forming a current loop.

[0058] like Figure 3 As shown, in some specific embodiments of the present invention, the first piezoelectric element 200 and the second piezoelectric element 300 each include two pole bodies. Both pole bodies are provided with a fixing portion, and the two pole bodies are connected to each other via the fixing portion. One of the pole bodies is electrically connected to the control module 600, and the other pole body is used to connect to one side of the metal member 100.

[0059] Specifically, one of the electrodes is electrically connected to the first port of the control module 600, the other electrode is used to connect to one side of the metal part 100, and the second port of the control module 600 is electrically connected to the metal part 100. For example, when the control module 600 generates a first control signal, the first port is a positive port and the second port is a negative port; when the control module 600 generates a second control signal, the first port is a negative port and the second port is a positive port. For example, referring to Figure 1 、 Figure 3 , Figure 3 The lower surface of the pole body A of the first piezoelectric element 200 is in contact with Figure 1 The upper surface of the metal member 100 is connected, the metal member 100 is electrically connected to the second port of the control module 600, and the pole body B of the first piezoelectric member 200 is electrically connected to the first port of the control module 600, thereby forming a current loop; correspondingly, Figure 3 The lower surface of the pole body A of the second piezoelectric element 300 is in contact with Figure 1 The lower surface of the metal member 100 is connected, the metal member 100 is electrically connected to the second port of the control module 600, and the pole body B of the second piezoelectric member 300 is electrically connected to the first port of the control module 600, thereby forming another current loop. When the control module 600 generates a first control signal, the first piezoelectric member 200 contracts and the second piezoelectric member 300 extends; when the control module 600 generates a second control signal, the first piezoelectric member 200 extends and the second piezoelectric member 300 contracts. Figure 3The fixed portions of both pole bodies A and B can be configured as interdigitated structures. These fixed portions are composed of multiple piezoelectric material layers arranged in parallel, with a gap between adjacent piezoelectric material layers. The fixed portion of the other pole body can be inserted into this gap, thereby stably connecting the two pole bodies. Furthermore, because the pole bodies include multiple piezoelectric material layers, the deformation of a piezoelectric component with multiple layers of piezoelectric material is greater than that of a single layer of piezoelectric material when the piezoelectric component has the same thickness. This increases the bending degree of the metal component 100, and thus increases the vibration amplitude of the metal component 100.

[0060] In some specific embodiments of the present invention, the material of the first piezoelectric element 200 and the material of the second piezoelectric element 300 are both lead-free piezoelectric ceramics.

[0061] Specifically, the material of the first piezoelectric element 200 and the material of the second piezoelectric element 300 are both lead-free piezoelectric ceramics. The use of lead-free piezoelectric ceramics for the piezoelectric elements can improve the safety of product use.

[0062] like Figure 1 As shown, in some specific embodiments of the present invention, the vibration device further includes: a first bracket 700 . The first bracket 700 is disposed at one end of the metal member 100 ; wherein the permanent magnet 400 is disposed at the other end of the metal member 100 .

[0063] Specifically, refer to Figure 1 The first bracket 700 is disposed at the left end of the metal member 100, and the permanent magnet 400 is disposed at the right end of the metal member 100. Since the left end of the metal member 100 is fixed to the first bracket 700, the right end of the metal member 100 can be bent upward or downward, thereby achieving vibration of the metal member 100.

[0064] like Figure 4 As shown, in some specific embodiments of the present invention, the vibration device further includes: a second bracket 800 . The second bracket 800 is disposed in the middle of the metal member 100 ; wherein the permanent magnet 400 is disposed on the circumference of the metal member 100 .

[0065] Specifically, refer to Figure 4The metal member 100 can be configured as a disc, the lower end of the second bracket 800 is connected to the center of the upper surface of the metal member 100, the permanent magnet 400 is arranged circumferentially on the upper surface of the metal member 100, the first piezoelectric member is arranged on the upper surface of the metal member 100 (not shown in the figure), and the second piezoelectric member is arranged on the lower surface of the metal member 100 (not shown in the figure), and the first piezoelectric member and the second piezoelectric member are arranged opposite each other. There is a gap between the first piezoelectric member and the permanent magnet 400, that is, the first piezoelectric member does not contact the permanent magnet 400, and the first piezoelectric member and the second piezoelectric member are made of the same material, structure, and specifications. When the control module 600 generates a first control signal, the first piezoelectric element contracts and the second piezoelectric element extends, causing the middle portion of the metal part 100 to sag downward and the circumference of the metal part 100 to bend upward. When the control module 600 generates a second control signal, the first piezoelectric element extends and the second piezoelectric element contracts, causing the middle portion of the metal part 100 to bulge upward and the circumference of the metal part 100 to bend downward. The metal part 100 vibrates through the movement of the first and second piezoelectric elements. The upper end of the second bracket 800 is connected to the electromagnet 500, which can be configured as a disc. When the electromagnet 500 generates an electromagnetic field, the permanent magnet 400 is affected by the magnetic force and drives the circumferential portion of the metal part 100 to bend upward or downward accordingly, thereby controlling the degree of bending of the end of the metal part 100 connected to the permanent magnet 400.

[0066] An embodiment of the present invention further provides an electronic device, comprising the vibration device described in any one of the above embodiments.

[0067] Specifically, the electronic device may be a piezoelectric speaker, piezoelectric bone conduction earphones, piezoelectric hearing aids, or piezoelectric tactile receptors. These electronic devices include a vibration device, which utilizes the vibration effects of the vibration device to achieve the corresponding function of the electronic device. For example, piezoelectric speakers, piezoelectric bone conduction earphones, and piezoelectric hearing aids all utilize the vibration of the vibration device to generate sound.

[0068] It can be seen that the contents of the above-mentioned vibration device embodiment are all applicable to the present electronic device embodiment. The functions specifically implemented by the present electronic device embodiment are the same as those of the above-mentioned vibration device embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned vibration device embodiment.

[0069] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A vibration device, characterized in that include: Metal parts; a first piezoelectric element, wherein the first piezoelectric element is disposed on a first side surface of the metal element; a second piezoelectric element, the second piezoelectric element being disposed on a second side surface of the metal element; wherein the second side surface is a side surface of the metal element away from the first piezoelectric element; a permanent magnet, the permanent magnet being disposed on the metal part; an electromagnet, the electromagnet being arranged opposite to the permanent magnet; a control module, the control module being respectively electrically connected to the metal member, the first piezoelectric member, the second piezoelectric member, and the electromagnet, the control module being configured to alternately generate a first signal and a second signal, wherein the first signal comprises a first control signal and an electromagnetic control signal, and the second signal comprises a second control signal and the electromagnetic control signal; wherein the polarity of the first control signal is opposite to the polarity of the second control signal; the first piezoelectric member and the second piezoelectric member each comprising: two pole bodies, each of the pole bodies being provided with a fixing portion, the two pole bodies being interconnected via the fixing portion, one of the pole bodies being electrically connected to the control module, and the other pole body being connected to one side of the metal member; a first bracket, the first bracket being arranged at one end of the metal member; wherein the permanent magnet is arranged at the other end of the metal member; The first piezoelectric element is configured to contract according to a first control signal, and the second piezoelectric element is configured to extend according to the first control signal, so that the metal element bends in a first direction; the first piezoelectric element is configured to extend according to a second control signal, and the second piezoelectric element is configured to contract according to the second control signal, so that one end of the metal element bends in a second direction; The electromagnet is used to generate an electromagnetic field according to the electromagnetic control signal, and the permanent magnet is used to control the bending degree of the metal part according to the electromagnetic field.

2. The vibration device according to claim 1, characterized in that Also includes: an amplitude detection module, the amplitude detection module being connected to the metal part and being used to detect the amplitude of the metal part; A filter module is used to be electrically connected to the control module, the electromagnet, and the amplitude detection module respectively, and the filter module is used to control the voltage of the electromagnetic control signal according to the amplitude.

3. The vibration device according to claim 2, characterized in that The filtering module includes: a filter, the filter being electrically connected to the control module and the amplitude detection module respectively, and the filter being configured to filter the electromagnetic control signal according to the amplitude; An amplifier is used to be electrically connected to the filter, the amplitude detection module, and the electromagnet respectively, and the amplifier is used to control the voltage of the electromagnetic control signal according to the amplitude.

4. The vibration device according to any one of claims 1 to 3, characterized in that The control module includes: a first port and a second port; wherein the first port is used to be electrically connected to the first piezoelectric component and the second piezoelectric component respectively, and the second port is used to be electrically connected to the metal component.

5. The vibration device according to claim 1, wherein The material of the first piezoelectric element and the material of the second piezoelectric element are both lead-free piezoelectric ceramics.

6. The vibration device according to any one of claims 1 to 3, characterized in that Also includes: A second bracket is arranged in the middle of the metal part; wherein the permanent magnet is arranged on the circumference of the metal part.

7. An electronic device, characterized in that include: A vibration device as claimed in any one of claims 1 to 5.

Images