WO2021203928A1

WO2021203928A1 - Vibration module and electronic device

Info

Publication number: WO2021203928A1
Application number: PCT/CN2021/081220
Authority: WO
Inventors: 许春东
Original assignee: 江西欧迈斯微电子有限公司
Priority date: 2020-04-09
Filing date: 2021-03-17
Publication date: 2021-10-14
Also published as: CN211604072U

Abstract

A vibration module and an electronic device. The vibration module comprises: a base (110); a touch element comprising a touchpad (120) disposed on a side of the base (110), wherein a side of the touchpad (120) located away from the base (110) is a touch surface; an elastic element (150) connected between the base (110) and the touch element, and capable of providing an elastic force to the touchpad (120) in a direction parallel to the touch surface; and a piezoelectric element (130) disposed on a side of the base (110) located away from the touchpad (120), the piezoelectric element (130) being connected between the base (110) and the touchpad (120), and capable of driving the touchpad (120) to vibrate at least in a direction parallel to the touch surface.

Description

Vibration module and electronic device

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202020505510.5, and the invention title is "vibration module and electronic device" on April 9, 2020, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of touch feedback, in particular to a vibration module and an electronic device.

Background technique

In general electronic devices (such as notebook computers) equipped with a touch panel, in order to reduce the overall thickness of the device, the physical buttons on the touch panel are gradually eliminated, and linear motors or piezoelectric motors are used instead to act on the touch panel. To achieve a vibration feedback function similar to pressing a physical button, so that users can experience the feeling of pressing vibration. However, when the touch panel encounters a large external resistance when vibrating, the connection between the touch panel and the driving motor is prone to breakage, resulting in damage to the vibration structure.

Summary of the invention

In the first aspect of the present application, a vibration module is provided, including:

Base

The touch element includes a touch pad, the touch pad is arranged on one side of the base, and the side of the touch pad away from the base is a touch surface;

An elastic element connecting the base and the touch element, the elastic element being able to provide the touch pad with an elastic force in a direction parallel to the touch surface; and

The piezoelectric element is arranged on the side of the base away from the touch pad, the piezoelectric element connects the base and the touch pad, and the piezoelectric element can drive the touch pad to Vibrate at least in a direction parallel to the touch surface.

For the way of vibrating along the thickness direction of the touch panel, the touch panel generally only has a strong longitudinal direction (along the touch panel's The thickness direction) vibrates, and the farther away from the contact area, the weaker the vibration, which results in uneven vibration of the touch panel, which makes it impossible to show the effect similar to pressing a physical button in each area of the touch panel. In the above-mentioned vibration module, the piezoelectric element is respectively connected to the touch panel and the base, and the piezoelectric element can drive the touch panel to vibrate laterally. In particular, in the lateral vibration mode, the entire touchpad vibrates uniformly, avoiding the problem of inconsistent vibration intensity of the touchpad in each area, so that each area of the touchpad can be well represented The effect is similar to pressing a physical button. By arranging the touch panel and the piezoelectric element on opposite sides of the base, it is possible to prevent the piezoelectric element from being arranged between the base and the touch panel and causing simultaneous contact with both sides. The person has friction. In addition, the above-mentioned vibration module is provided with the elastic element to provide the touchpad with elastic force in the lateral direction, which not only can reset the touchpad, but also encounters a greater impact when the touchpad vibrates in the lateral direction. When the resistance is high, the elastic element can also deform by itself to play a buffering role, so as to prevent the connection between the touch panel and the piezoelectric element from breaking, so as to protect the touch panel and the piezoelectric element. The function of the piezoelectric element further protects the vibration module and improves the stability of the vibration module.

In a second aspect of the present application, an electronic device is provided, including a housing and the vibration module according to the first aspect of the present application, and the base is provided on the housing.

Since the touch panel in the above-mentioned vibration module can vibrate evenly in the lateral direction, when the user is using the electronic device provided with the above-mentioned vibration module, the user can obtain information in each area of the touch panel. Uniform vibration feedback. In addition, the structure of the vibration module is stable, which can increase the service life of the touch feedback function in the electronic device.

Description of the drawings

In order to better describe and illustrate the embodiments of the present application, one or more drawings may be referred to, but the additional details or examples used to describe the drawings should not be considered as the invention and the implementation of the present description of the present application. The scope of any one of the examples or preferred modes is limited.

Fig. 1 is a side view structural diagram of a vibration module according to an embodiment of the present application;

Fig. 2 is a bottom structural view of a vibration module according to an embodiment of the present application;

Fig. 3 is a bottom structural view of a vibration module according to another embodiment of the present application;

4 is a schematic diagram of an electronic device using a vibration module according to an embodiment of the present application;

FIG. 5 is a schematic diagram of the positions of the housing and the vibration module of the electronic device according to an embodiment of the present application.

Detailed ways

In order to facilitate the understanding of the application, the application will be described in a more comprehensive manner with reference to the relevant drawings. The preferred embodiment of the application is shown in the accompanying drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

It should be noted that when an element is referred to as being "fixed to" another original, it can be directly on the other element or a central element can also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another original, there are no intervening elements. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terminology used in this specification is only for the purpose of describing specific embodiments, and is not intended to limit the application. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

In general electronic devices (such as notebook computers) equipped with a touch panel, in order to reduce the overall thickness of the device, the physical buttons on the touch panel are gradually eliminated, and linear motors or piezoelectric motors are used instead to act on the touch panel. To achieve a vibration feedback function similar to pressing a physical button, so that users can experience the feeling of pressing vibration. However, when the touch panel encounters a large external resistance when vibrating, the connection between the touch panel and the driving motor is prone to breakage, resulting in damage to the vibration structure. To this end, the present application provides a vibration module to solve the above-mentioned problems.

1, in an embodiment of the present application, the vibration module 10 includes a base 110, a touch panel 120, a piezoelectric element 130, an outer frame 140 and an elastic element 150. The touch pad 120 and the outer frame 140 are part of the touch elements of the vibration module 10. The touch pad 120 is disposed on one side of the base 110, the side of the touch pad 120 away from the base 110 is a touch surface 121, and the touch surface 121 is a flat surface. Generally, the touch panel 120 of some embodiments is provided with a touch sensor to sense the user's operations on the touch surface 121 (such as finger swiping and pressing). The direction parallel to the touch surface 121 is the lateral direction, the outer frame 140 surrounds the base 110 in the lateral direction and forms a closed structure, and the outer frame 140 is spaced apart from the base 110 in the lateral direction. In the direction perpendicular to the touch surface 121, one side of the outer frame 140 is fixed to the touch pad 120 by the connecting member 101. The piezoelectric element 130 is a piezoelectric ceramic. The piezoelectric element 130 has a strip structure (specifically, a rectangular parallelepiped, a cylinder, etc.). Taking a rectangular parallelepiped as an example, the length of the strip structure is greater than three times the width and three times the thickness. .

The piezoelectric element 130 has a first axis 1301 in the length direction. The piezoelectric element 130 can expand and contract in a k31 mode under the action of an electric field perpendicular to the first axis 1301, that is, expand and contract in a direction parallel to the first axis 1301. The piezoelectric element 130 is disposed on the side of the base 110 away from the touch pad 120, and the piezoelectric element 130 is fixed on the side of the base 110 away from the touch pad 120 at one end along the direction of the first axis 1301 through the connector 101 ( That is, it is fixed to the bottom of the base 110), at the other end along the direction of the first axis 1301, is fixed to the side of the outer frame 140 away from the touchpad 120 through the connecting piece 101. The connecting piece 101 may be glue, foam, etc. Viscous material. In addition to bonding, the piezoelectric element 130 can also be connected to the base 110 and the outer frame 140 by welding, clamping, or the like. It should be noted that the first axis 1301 of the piezoelectric element 130 is the longest central axis. For example, when the piezoelectric element 130 has a rectangular structure, the piezoelectric element 130 has three mutually perpendicular central axes, of which the longest center The shaft is the first axis 1301.

The first axis 1301 of the piezoelectric element 130 is parallel to the touch surface 121. Therefore, when the piezoelectric element 130 expands and contracts along the direction of the first axis 1301, the piezoelectric element 130 can drive the outer frame 140 and the touch pad 120 relative to the base 110. When the displacement occurs in the lateral direction, the expansion and contraction frequency of the piezoelectric element 130 can be controlled by adjusting the frequency of the electric field to drive the touch panel 120 and the outer frame 140 to vibrate in the lateral direction. Above, since the two ends of the piezoelectric element 130 are respectively connected to the base 110 and the outer frame 140, when the piezoelectric element 130 stretches and deforms along the direction of the first axis 1301 under the inverse piezoelectric effect, the transverse direction of the touch panel 120 The displacement is equivalent to the maximum expansion and contraction of the piezoelectric element 130 under the action of an electric field, which is beneficial to increase the vibration amplitude of the touch panel 120.

On the other hand, the outer frame 140 can provide a corresponding transition structure for the touch panel 120 in the direction perpendicular to the touch surface 121, so that the piezoelectric element 130 disposed on the other side of the base 110 can be connected through the outer frame 140. The touch control panel 120 does not need to be formed into a special-shaped structure of the touch panel 120 or the piezoelectric element 130 to extend in a direction perpendicular to the touch surface 121 to realize the connection between the two. Of course, in some embodiments, the outer frame 140 can also be integrally designed with the touch panel 120, for example, it can be used as a part of the touch panel 120.

In addition, in the above embodiment, the elastic element 150 is connected to the base 110 and the touchpad 120. When the touchpad 120 deviates from the equilibrium position relative to the base 110, the elastic element 150 can provide the touchpad 120 with elasticity in the lateral direction. Force to drive the touchpad 120 to return to the equilibrium position. Moreover, the elastic element 150 also has a strip structure, and the elastic element 150 having a strip structure can more effectively apply elastic force between the touch panel 120 and the base 110 without occupying too much space. Specifically, the strip structure is not limited to a straight strip structure, and may also be a strip structure bent in a certain arc or bent at a certain angle.

For the general way of vibrating along the thickness direction of the touch panel 120, the touch panel 120 generally only has a strong longitudinal direction (along the touch panel 120) in the area in contact with the driving element (such as a linear motor or a piezoelectric motor). In the thickness direction of the touch pad 120, the vibration becomes weaker, and the farther away from the contact area, the weaker the vibration, which results in uneven vibration of the touch pad 120, which makes it impossible to show the effect similar to pressing a physical button in each area of the touch pad 120. In the vibration module 10 described above, the piezoelectric element 130 is connected to the touch panel 120 and the base 110 respectively, and the piezoelectric element 130 can drive the touch panel 120 to vibrate laterally. In particular, in the lateral vibration mode, the entire touchpad 120 vibrates uniformly, avoiding the problem of inconsistent vibration intensity of the touchpad 120 in each area, so that each area of the touchpad 120 can well reflect and press the entity. The similar effect of pressing the key. By arranging the touch panel 120 and the piezoelectric element 130 on opposite sides of the base 110, the piezoelectric element 130 can be prevented from being rubbed between the base 110 and the touch panel 120 due to the fact that the piezoelectric element 130 is arranged between the base 110 and the touch panel 120 at the same time. In addition, the above-mentioned vibration module 10 is provided with elastic elements 150 to provide lateral elastic force for the touchpad 120, which not only supports the touchpad 120 and resets the touchpad 120, but also when the touchpad 120 is in position When encountering greater resistance during lateral vibration, the elastic element 150 can also deform by itself to play a buffering role, avoiding the connection between the touch panel 120 and the piezoelectric element 130 from breaking, thereby protecting the touch panel. The functions of 120 and the piezoelectric element 130 further protect the vibration module 10 and improve the stability of the vibration module 10.

Continuing to refer to FIG. 1, in some embodiments, the side of the base 110 close to the touch pad 120 abuts the touch pad 120. When it is described that the base 110 is in contact with the control panel 120, it means that the base 110 and the touch panel 120 are in contact, but are not fixedly connected. At this time, the touch panel 120 can still move relative to the base 110. In the above-mentioned design, the base 110 abuts against the touch panel 120, so that the touch panel 120 can be supported by the base 110, which is beneficial to prevent the touch panel 120 from being deformed greatly when pressed. It should be noted that, in addition to the abutting arrangement, there is a slight gap between the base 110 and the touchpad 120 in some embodiments (for example, the distance is less than 1mm), which can reduce the contact between the touchpad 120 and the touchpad 120 when vibrating. The friction of the base 110 at the same time can prevent the touchpad 120 from deforming greatly when it is pressed.

1, in some embodiments, the vibration module 10 includes a first positive electrode 161 and a first negative electrode 162. In the direction perpendicular to the first axis 1301, the first positive electrode 161 and the first negative electrode 162 are respectively disposed on opposite sides of the piezoelectric element 130. Specifically, in the embodiment shown in FIG. 1, the first positive electrode 161 is disposed on the side of the piezoelectric element 130 close to the base 110, and the first negative electrode 162 is disposed on the side of the piezoelectric element 130 away from the base 110. . The first positive electrode 161 and the first negative electrode 162 can be plating layers provided on the piezoelectric element 130 by means of electroless plating, vacuum plating, or the like. Of course, in addition to being a plating layer, the first positive electrode 161 and the first negative electrode 162 may be other elements capable of generating an electric field. In these embodiments, an electric field can be formed between the first positive electrode 161 and the first negative electrode 162. By adjusting the voltage applied to each electrode, the intensity and frequency of the electric field formed between the electrodes can be controlled to control the voltage. The amount of expansion and contraction of the electrical element 130 in the direction of the first axis 1301 in turn controls the touch panel 120 to vibrate in the lateral direction. In addition to being arranged on opposite sides of the piezoelectric element 130 close to and away from the base 110 (that is, arranged on opposite sides of the piezoelectric element 130 in the direction perpendicular to the touch surface 121), the first positive electrode 161 The first negative electrode 162 and the second negative electrode 162 can also be arranged on opposite sides of the piezoelectric element 130 perpendicular to the first axis 1301 and parallel to the first touch surface 121.

In addition, when the piezoelectric element 130 has the above-mentioned strip structure, the distance between the first positive electrode 161 and the second negative electrode provided on opposite sides of the piezoelectric element 130 in the direction perpendicular to the first axis 1301 is different. It will be too far away, which is conducive to the formation of a stronger electric field. In addition to the strip structure, the structure of the piezoelectric element 130 may also be a plate structure. In this case, the first positive electrode 161 and the first negative electrode 162 are preferably arranged on opposite sides of the plate structure in the thickness direction.

The vibration module 10 in some embodiments may be provided with one or more (for example, one, two, three or more) piezoelectric elements 130, and each piezoelectric element 130 is connected to the base 110 and the touch element. (For example, directly connected to the touchpad 120 or the housing 140). 2, in some embodiments, the vibration module 10 includes two piezoelectric elements 130, the first axis 1301 of the two piezoelectric elements 130 are on the same straight line, one end of the two piezoelectric elements 130 is connected to the base 110 At the bottom, the other end is connected to the outer frame 140 away from the side where the touchpad 120 is provided. When there are two or more piezoelectric elements 130, in addition to collinear arrangement, the first axis 1301 of each vibration module 10 can also be kept parallel to each other. The element 130 can expand and contract in the same direction. The above-mentioned design can drive the touch panel 120 more effectively, and in addition, can share the driving force for driving the touch panel 120 to vibrate to each piezoelectric element 130, so that the size of each piezoelectric element 130 is not too large.

In addition, referring to FIG. 3, the location of the piezoelectric element 130 is not limited to the position in the embodiment shown in FIG. 2. The first axis 1301 of the piezoelectric element 130 can be designed along any direction in the transverse direction of the vibration module 10. The direction of the first axis 1301 is specifically determined according to actual product requirements, and will not be repeated here. It should be noted that in the embodiments of the present application, the directions parallel to the touch surface 121 can all be referred to as the lateral direction, and the marks in FIGS. 2 and 3 only represent two mutually perpendicular directions in the lateral direction.

Regarding the material of the connecting member 101, in some embodiments, the piezoelectric element 130 can be fixedly connected to the base 110 and the outer frame 140 by means of fixed connection such as glue curing and welding. The first axis 1301 of the element 130 should be designed in parallel to prevent the piezoelectric element 130 from being broken due to the different expansion and contraction directions. However, in other embodiments, when the connecting member 101 is made of an elastic material such as foam, the piezoelectric element 130 can be elastically connected to the outer frame 140 through the connecting member 101. At this time, the piezoelectric element 130 can be opposed to the touch panel 120. Rotate a small angle without easily damaging the connecting piece 101. In this connection mode, when there are at least two piezoelectric elements 130, the first axis 1301 of each piezoelectric element 130 can be designed to be inclined or even perpendicular to each other. Thus, the touch panel 120 can vibrate in more directions parallel to the touch surface 121, thereby improving the flexibility of lateral vibration. The inclination angle between two adjacent first axes 1301 can be between 0° and 90°, such as 20°, 30°, 45° or 60°.

3, in some embodiments, the elastic element 150 has a strip structure, and one end of the elastic element 150 is connected to the side of the base 110 close to the outer frame 140, or connected to the side of the base 110 away from the touch pad 120 , The other end is connected to the outer frame 140. The elastic element 150 having a strip structure can more effectively apply elastic force between the touch panel 120 and the base 110 without occupying too much space. For the elastic element 150, the strip structure is not limited to the straight strip structure, and the strip structure may have multiple bends. Specifically, in some embodiments, the elastic element 150 includes a first connecting portion 151, a middle portion 152, and a second connecting portion 153. One end of the first connecting portion 151 is perpendicularly connected to one end of the middle portion 152, and the first connecting portion 151 The other end of the second connecting portion 153 is connected to the base 110; one end of the second connecting portion 153 is vertically connected to the end of the middle portion 152 away from the first connecting portion 151, and the other end is connected to the outer frame 140. Similar to the connection method of the piezoelectric element 130, in some embodiments, the first connecting portion 151 of the elastic element 150 is connected to the bottom of the base 110, and the second connecting portion 153 is connected to the outer frame 140 away from the touchpad 120. On the side. The elastic element 150 can be connected to the base 110 and the outer frame 140 by bonding, welding, clamping, or the like. The elastic element 150 having the above structure can more effectively apply elastic force between the touch panel 120 and the base 110 without occupying too much space. Further, in some embodiments, the elastic element 150 may be a plane spring, wherein the central axes of the first connecting portion 151, the middle portion 152, and the second connecting portion 153 are all on the same plane. In addition to the plane spring, the elastic element 150 may also be other types of springs or other elements capable of providing elastic force. In addition, the number of elastic elements 150 may be two, three or more, and the plurality of elastic elements 150 can be connected to the base 110 and the outer frame 140 in different directions, respectively, so as to provide the touchpad 120 and the outer frame 140 Multi-directional elasticity and support.

Specifically, continuing to refer to FIG. 3, in some embodiments, the base 110 has a rectangular parallelepiped structure. At this time, the base 110 includes a top surface 111 (not shown in FIG. 3, refer to the embodiment of FIG. 1), a bottom surface 112, and Four side surfaces 113 connecting the top surface 111 and the bottom surface 112, the top surface 111 faces the touch panel 120, and the four side faces 113 face the outer frame 140. In some embodiments, at least one elastic element 150 is provided between each side surface 113 and the outer frame 140. Specifically, in one embodiment, the vibration module 10 includes four elastic elements 150, and one elastic element 150 is respectively provided between the four side surfaces 113 and the outer frame 140. That is, between each side surface 113 and the corresponding outer frame 140, the elastic element 150 connects the side surface 113 and connects the surface of the outer frame 140 facing the side surface 113. In the above design, the base 110 is elastically connected to the touch pad 120 on the four sides 113, so that the touch pad 120 can be supported, elastically reset, and buffered in multiple directions.

It should be noted that, in some embodiments, the outer frame 140 may not be provided. At this time, the piezoelectric element 130 is connected to the bottom of the base 110 and the touch pad 120, and the elastic element 150 is also connected to the bottom of the base 110 and the touch pad 120. . Specifically, one end of the piezoelectric element 130 can be extended toward the direction perpendicular to the touch surface 121 to connect the touchpad 120 through the extension end; or an extension portion can be provided on the side of the touchpad 120 close to the base 110, Thereby, it is connected to the piezoelectric element 130 through the extension part. The connection mode of the elastic element 150 and the touch panel 120 can refer to the connection mode of the piezoelectric element 130 and the touch panel 120 described above.

In addition, the first axis 1301 in the above embodiments is an example parallel to the touch surface 121. However, in other embodiments, the first axis 1301 can also be designed to be inclined to the touch surface 121, that is, form an inclined angle with the touch surface 121, for example, the inclined angle is within 20°. At this time, when the piezoelectric element 130 expands and contracts in the direction of the first axis 1301, the touch panel 120 can be driven to vibrate in both the horizontal direction (parallel to the touch surface 121) and the vertical direction (perpendicular to the touch surface 121). That is, the design of the first axis 1301 inclined to the touch surface 121 enables the touch panel 120 to have vibration components in both the horizontal and vertical directions, thereby enriching the vibration modes of the module and making the vibration feedback more obvious.

4 and 5, some embodiments of the present application also provide an electronic device 20. The electronic device 20 includes a housing 210, a housing 220, and a vibration module 10. The base 110 and the housing in the vibration module 10 220 is relatively fixed. The housing 220 may be an internal support of the electronic device 20. The electronic device 20 may be, but is not limited to, an electronic device 20 with a touch surface 121 board, such as a notebook computer, a portable external touch pad 120, or the like.

It should be noted that the housing 210 of the electronic device 20 should be misaligned with the touch panel 120 in the lateral direction (the structure shown in FIG. 5) or there is a gap to prevent the housing 210 from obstructing the lateral vibration of the touch panel 120.

Since the touchpad 120 in the vibration module 10 can vibrate evenly in the lateral direction, when the user is using the electronic device 20 provided with the vibration module 10, the user can obtain uniform vibrations in each area of the touchpad 120. Vibration feedback. In addition, the structure of the vibration module 10 is stable, so that the service life of the touch feedback function in the electronic device 20 can be increased.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several implementation manners of the present application, and their description is relatively specific and detailed, but they should not be interpreted as a limitation on the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Claims

A vibration module, including:

Base

The touch element includes a touch pad, the touch pad is arranged on one side of the base, and the side of the touch pad away from the base is a touch surface;

An elastic element connecting the base and the touch element, the elastic element being able to provide the touch pad with an elastic force in a direction parallel to the touch surface; and

The piezoelectric element is arranged on the side of the base away from the touch pad, the piezoelectric element connects the base and the touch pad, and the piezoelectric element can drive the touch pad to Vibrate at least in a direction parallel to the touch surface.
The vibration module according to claim 1, wherein the touch element comprises an outer frame, the outer frame surrounds the base and is spaced from the base in a direction parallel to the touch surface It is arranged that, in a direction perpendicular to the touch surface, one side of the outer frame is connected to the touch pad, and the other side of the outer frame is connected to the piezoelectric element.
The vibration module according to claim 1, wherein the piezoelectric element has a strip structure.
The vibration module according to claim 1, wherein the piezoelectric element has a plate-like structure.
The vibration module according to claim 2, wherein the piezoelectric element has a first axis, the first axis of the piezoelectric element is parallel to the touch surface, and the piezoelectric element moves along the One end in the direction of the first axis is connected to the base, and the piezoelectric element is connected to the outer frame at the other end in the direction of the first axis. The electric field acts in the direction perpendicular to the first axis. Next, the piezoelectric element can expand and contract along the first axis.
The vibration module according to claim 5, comprising a first positive electrode and a first negative electrode, and in a direction perpendicular to the first axis, the piezoelectric element is provided with the first positive electrode on one side. The electrode is provided with the first negative electrode on the opposite side, and an electric field can be formed between the first positive electrode and the first negative electrode to drive the piezoelectric element to expand and contract along the first axis.
5. The vibration module according to claim 5, comprising at least two piezoelectric elements, and the first axes of the at least two piezoelectric elements are parallel to each other.
The vibration module according to claim 5, comprising at least two of the piezoelectric elements, each of the piezoelectric elements is elastically connected to at least one of the base and the outer frame, and at least two The first axes of the piezoelectric elements are perpendicular to each other or inclined to each other.
3. The vibration module according to claim 2, wherein the elastic element has a strip structure, one end of the elastic element is connected to the base, and the other end is connected to the outer frame.
The vibration module according to claim 2, wherein the elastic element comprises a first connecting part, a middle part, and a second connecting part, one end of the first connecting part is perpendicularly connected to one end of the middle part, and the other One end is connected to the base; one end of the second connecting part is vertically connected to the end of the middle part away from the first connecting part, and the other end is connected to the outer frame.
The vibration module according to claim 2, wherein the base includes a top surface, a bottom surface, and four side surfaces connecting the top surface and the bottom surface, the top surface faces the touch panel, and four The side faces face the outer frame, and at least one elastic element is arranged between each of the side faces and the outer frame.
The vibration module according to claim 1 or 2, wherein the side of the base close to the touch pad abuts the touch pad.
The vibration module according to claim 1 or 2, wherein there is a separation distance between the base and the touch pad, and the separation distance is less than 1 mm.
The vibration module according to claim 2, wherein the piezoelectric element has a first axis, the first axis of the piezoelectric element forms an inclined angle with the touch surface, and the inclined clip The angle is within 20°.
An electronic device, comprising a housing and the vibration module according to any one of claims 1 to 14, and the base is provided on the housing.