WO2022193583A1

WO2022193583A1 - Touch feedback module and electronic device

Info

Publication number: WO2022193583A1
Application number: PCT/CN2021/118606
Authority: WO
Inventors: 冯昀; 王松
Original assignee: 江西欧迈斯微电子有限公司
Priority date: 2021-03-17
Filing date: 2021-09-15
Publication date: 2022-09-22
Also published as: CN113126820A

Abstract

A touch feedback module and an electronic device. The touch feedback module (100) comprises a first piezoelectric unit (40), a first elastic tab (10), a second elastic tab (20), and at least one limiting unit (50). The first elastic tab (10) and the second elastic tab (20) are provided on both sides of the first piezoelectric unit (40). The at least one limiting unit (50) is provided between the first elastic tab (10) and the second elastic tab (20), and is used for limiting the movement amplitudes of the first elastic tab (10) and the second elastic tab (20), such that a first gap and a second gap between the first elastic tab (10) and the second elastic tab (20) are within a preset range. By providing at least one limiting unit (50) between the first elastic tab (10) or the second elastic tab (20), the touch feedback module prevents further deformation of the first elastic tab (10) or the second elastic tab (20), thus avoiding the occurrence of degumming and cracking of the first piezoelectric unit (40) due to small contact areas of regions where connection regions of the first piezoelectric unit (40) are connected to the first elastic tab (10) and the second elastic tab (20).

Description

Touch feedback module and electronic equipment

technical field

The present application relates to the field of touch technology, and in particular, to a touch feedback module and an electronic device.

Background technique

The touch feedback module is usually assembled by the cymbal shrapnel on both sides and the piezoelectric unit. Because the piezoelectric unit undergoes electrostrictive deformation when a voltage signal is applied, the cymbal shrapnel on both sides is then stretched or compressed. Finally, the expansion and contraction of the horizontal plane is converted into vibration in the vertical direction. The touch feedback module with cymbal shrapnel has a large driving force, high amplitude strength and acceleration, and is suitable for electronic equipment such as mobile phone side buttons and vehicle central control screens. .

In the process of realizing this application, the inventor found that there are at least the following problems in the prior art: the traditional touch feedback module with cymbal shrapnel is simple in structure, and has the following defects in the process of reliability testing or lamination assembly: when When the user presses the touch surface, the cymbal shrapnel will be bent and deformed by force. When the load is large, the contact area between the cymbal shrapnel and the piezoelectric unit is small, and the problem of degumming and cracking of the piezoelectric unit is prone to occur.

SUMMARY OF THE INVENTION

In view of the above content, it is necessary to propose a touch feedback module and an electronic device to solve the above problems.

An embodiment of the present application provides a touch feedback module, including:

A first piezoelectric unit, along the expansion and contraction direction of the first piezoelectric unit, the first piezoelectric unit includes a connection area provided at both ends of the first piezoelectric unit, and located between the two connection areas the functional area;

A first elastic sheet is arranged on one side of the first piezoelectric unit, two ends of the first elastic sheet are respectively connected with the connection areas at both ends of the first piezoelectric unit, and the first elastic sheet is connected to the There is a first gap between the functional areas of the piezoelectric unit;

The second elastic sheet is arranged on the side of the first piezoelectric unit away from the first elastic sheet, and the two ends of the second elastic sheet are respectively connected with the connection areas at both ends of the first piezoelectric unit, and the There is a second gap between the second elastic piece and the functional area of the first piezoelectric unit; and

At least one limiting unit, the at least one limiting unit is arranged between the first elastic piece and the second elastic piece, and is used to limit the movement range of the first elastic piece and the second elastic piece so that the The first gap and the second gap between the first elastic piece and the second elastic piece are within a preset range.

The above-mentioned touch feedback module, by disposing at least one limit unit between the first elastic piece and the second elastic piece, when the user presses the first elastic piece or the second elastic piece, the first elastic piece or the second elastic piece is bent and deformed by the force, and the first elastic piece or the second elastic piece is bent and deformed. A shrapnel and the second shrapnel move toward each other along the vibration direction of the first shrapnel and the second shrapnel, the first shrapnel and the second shrapnel change in amplitude due to the movement, and the first gap between the first shrapnel and the second shrapnel and the second gap will gradually decrease. When the load is large, at least one limiting unit limits the first gap and the second gap between the first elastic piece and the second elastic piece within a preset range, so as to prevent the first elastic piece or the second elastic piece from further deformation and avoid Because the contact area between the connection area of the first piezoelectric unit and the area where the first elastic sheet and the second elastic sheet are connected is small, the phenomenon of degumming and cracking of the first piezoelectric unit under force occurs.

An embodiment of the present application further provides an electronic device, including the above touch feedback module.

In the touch feedback module of the above electronic device, by disposing at least one limiting unit between the first elastic piece and the second elastic piece, when the user presses the touch surface of the touch feedback module, the first elastic piece or the second elastic piece is stressed The bending deformation occurs, and the first and second elastic pieces move toward each other along the vibration direction of the first and second elastic pieces. The amplitude of the first and second elastic pieces changes due to the movement. The first gap and the second gap between them will gradually decrease. When the load is large, at least one limiting unit stops the first gap and the second gap between the first elastic piece and the second elastic piece within a preset range, thereby preventing the first elastic piece or the second elastic piece from further deforming, The phenomenon of degumming and cracking of the first piezoelectric unit due to force due to the small contact area between the connection area of the first piezoelectric unit and the area where the first elastic sheet and the second elastic sheet are connected is avoided.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of a touch feedback module provided by a first embodiment of the present application.

FIG. 2 is an exploded schematic view of the touch feedback module shown in FIG. 1 .

FIG. 3 is a schematic front view of the touch feedback module shown in FIG. 1 .

FIG. 4 is a schematic front view of a touch feedback module provided by a second embodiment of the present application.

FIG. 5 is a schematic front view of a touch feedback module provided by a third embodiment of the present application.

FIG. 6 is a three-dimensional schematic diagram of a touch feedback module provided by a fourth embodiment of the present application.

FIG. 7 is a schematic front view of the touch feedback module shown in FIG. 6 .

FIG. 8 is a schematic front view of a touch feedback module provided by a fifth embodiment of the present application.

FIG. 9 is a schematic front view of a touch feedback module provided by a sixth embodiment of the present application.

FIG. 10 is a schematic front view of a touch feedback module provided by a seventh embodiment of the present application.

FIG. 11 is a schematic front view of a touch feedback module provided by an eighth embodiment of the present application.

FIG. 12 is a schematic perspective view of an electronic device provided by a ninth embodiment of the present application.

Description of main component symbols

Electronic equipment 1000

Touch feedback module

100, 200, 300, 400, 500, 600, 700, 800

First shrapnel 10

The first protrusion 12

Second shrapnel 20

The second protrusion 22

Gap 30

first gap 32

second gap 34

The first piezoelectric unit 40

Connection area 42

Ribbon 44

Limit unit 50

Stopper 52

Limit clearance 54

Elastic parts 56

The second piezoelectric unit 60

Positioning piece 70

Support 80

Support protrusion 82

Screws 84

Middle frame 900

Detailed ways

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present application, and should not be construed as a limitation on the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

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

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Please refer to FIG. 1 , which is a three-dimensional schematic diagram of a touch feedback module provided by a first embodiment of the present application. The touch feedback module 100 is used to provide the user with functions such as vibration feedback, fingerprint recognition, power-on, power-off, pressure sensing, and the like. The touch feedback module 100 includes a first piezoelectric unit 40 , a first elastic piece 10 , a second elastic piece 20 and at least one limiting unit 50 .

Along the expansion and contraction direction of the first piezoelectric unit 40, the first piezoelectric unit 40 includes a connection area 42 disposed at both ends of the first piezoelectric unit 40, and a functional area 44 located between the two connection areas 42; the first elastic sheet 10 Located on one side of the first piezoelectric unit 40 , two ends of the first elastic sheet 10 are respectively connected to the connection areas 42 at both ends of the first piezoelectric unit 40 , and the first elastic sheet 10 is connected to the functional area 44 of the first piezoelectric unit 40 . There is a first gap 32 therebetween; the second elastic sheet 20 is arranged on the side of the first piezoelectric unit 40 away from the first elastic sheet 10 , and the two ends of the second elastic sheet 20 are respectively connected with the connection areas 42 at both ends of the first piezoelectric unit 40 , and there is a second gap 34 between the second elastic sheet 20 and the functional area 44 of the first piezoelectric unit 40; at least one limiting unit 50 is arranged between the first elastic sheet 10 and the second elastic sheet 20 to limit the first The range of movement of the elastic piece 10 and the second elastic piece 20 is such that the first gap 32 and the second gap 34 between the first elastic piece 10 and the second elastic piece 20 are within a predetermined range.

In the above touch feedback module 100 , by disposing at least one limiting unit 50 between the first elastic piece 10 and the second elastic piece 20 , when the user presses the first elastic piece 10 or the second elastic piece 20 , the first elastic piece 10 or the second elastic piece The force 20 bends and deforms along the vibration direction of the first elastic sheet 10 and the second elastic sheet 20, the first elastic sheet 10 and the second elastic sheet 20 drive the first piezoelectric unit 40 to deform, and the first piezoelectric unit 40 passes through the positive piezoelectric effect. A voltage signal is generated to realize the detection of the load force. At the same time, the first elastic piece 10 and the second elastic piece 20 move toward each other along the vibration direction of the first elastic piece 10 and the second elastic piece 20, that is, the amplitude of the first elastic piece 10 or the second elastic piece 20 changes due to the movement. The first gap 32 and the second gap 34 between the 10 and the second elastic piece 20 will gradually decrease. When the load is large, the deformation amount of the first elastic piece 10 or the second elastic piece 20 due to the bending deformation of the force is large, and the first gap 32 and the second gap 34 between the first elastic piece 10 and the second elastic piece 20 are large. will become smaller, at this time, the limiting unit 50 defines the first gap 32 and the second gap 34 between the first elastic piece 10 and the second elastic piece 20 within a preset range, so that the first elastic piece 10 or the second elastic piece 20 The range of motion caused by the bending deformation of the force is within a preset range, thereby preventing the first elastic piece 10 or the second elastic piece 20 from further deforming, and further preventing the first elastic piece 10 and/or the second elastic piece 20 and the first elastic piece 20. Relative movement occurs between the piezoelectric units 40 along the expansion and contraction direction of the first piezoelectric unit 40, so as to avoid the small contact area between the connection area 42 of the first piezoelectric unit 40 and the area where the first elastic sheet 10 and the second elastic sheet 20 are connected. The problem of debonding and cracking of the first piezoelectric unit 40 occurs due to force.

It should be noted that the gap 30 represents the first gap 32 and the second gap 34 . The preset range refers to the range in which the first elastic piece 10 and the second elastic piece 20 no longer move toward each other along the vibration direction of the first elastic piece 10 and the second elastic piece 20 , which can also be understood as the first elastic piece 10 and/or the second elastic piece 20 The range of relative movement with the first piezoelectric unit 40 along the extension and contraction direction of the first piezoelectric unit 40 is no longer there. Wherein, when the gap 30 between the first elastic sheet 10 and the second elastic sheet 20 is smaller than the preset range, the first elastic sheet 10 and the second elastic sheet 20 may be in contact with the first piezoelectric element 40 along the expansion and contraction direction of the first piezoelectric unit 40 . The relative movement of the unit 40 causes the connection area 42 of the first piezoelectric unit 40 to have a small contact area with the first elastic sheet 10 and the second elastic sheet 20 , which causes the first piezoelectric unit 40 to be degummed and cracked due to force. .

It should be noted that the expansion and contraction direction of the first piezoelectric unit 40 is the X axis as shown in FIG. 1 , and the expansion and contraction direction of the first piezoelectric unit 40 indicates that when the first piezoelectric unit 40 is loaded with a driving signal, the first piezoelectric The direction of electrostriction of the unit 40, the Z axis as shown in FIG. 1 represents the vibration direction of the first elastic sheet 10 and the second elastic sheet 20 (the vibration direction of the first elastic sheet 10, the vibration direction of the second elastic sheet 20), that is The vibration direction of the touch feedback module 100 and the expansion and contraction direction of the first piezoelectric unit 40 are perpendicular to the vibration directions of the first elastic sheet 10 and the second elastic sheet 20 . The Y axis as shown in FIG. 1 represents a direction perpendicular to the expansion and contraction direction of the first piezoelectric unit 40 and a direction perpendicular to the vibration direction of the first elastic piece 10 and the second elastic piece 20 .

The first piezoelectric unit 40 may be a piezoelectric film, piezoelectric ceramics, or other components capable of generating piezoelectric effects.

Please refer to FIG. 2 and FIG. 3 together. In this embodiment, the structures of the first elastic piece 10 and the second elastic piece 20 are similar. The first elastic piece 10 and the second elastic piece 20 can be cymbal elastic pieces. The shrapnel 20 has a generally arcuate structure, and the two ends of the first shrapnel 10 and the two ends of the second shrapnel 20 are fixedly connected to the connection areas 42 at both ends of the first piezoelectric unit 40 by fixing glue, double-sided tape or the like. A first gap 32 is formed between the side of the first elastic sheet 10 that is close to the first piezoelectric unit 40 and the first piezoelectric unit 40 except for both ends, so that the first elastic sheet 10 is separated from the two ends of the first piezoelectric unit 40 . A side of the connecting region 42 that is close to the first piezoelectric unit 40 is spaced apart from the first piezoelectric unit 40 , and the first gap 32 is used to form a deformation space for the first elastic piece 10 . A second gap 34 is formed between the side of the second elastic sheet 20 that is close to the first piezoelectric unit 40 and the first piezoelectric unit 40 except for both ends, so that the second elastic sheet 20 is separated from the two ends of the first piezoelectric unit 40 . The side of the connecting region 42 that is close to the first piezoelectric unit 40 is spaced apart from the first piezoelectric unit 40 , and the second gap 34 is used to form a deformation space for the second elastic piece 20 . The first gap 32 and the second gap 34 form a gap 30 between the first elastic piece 10 and the second elastic piece 20 .

In this embodiment, along the direction perpendicular to the expansion and contraction direction of the first piezoelectric unit 40 and the direction perpendicular to the vibration direction of the first elastic sheet 10 and the second elastic sheet 20 , that is, the Y axis as shown in FIG. 1 The two sides of the first elastic piece 10 are respectively provided with first protruding parts 12 , the two sides of the second elastic piece 20 are respectively provided with second protruding parts 22 , the first protruding part 12 and the second protruding part 22 are one A corresponding and opposite arrangement, at least one limiting unit 50 is disposed between the first protruding portion 12 and the corresponding second protruding portion 22 . In this way, the limiting unit 50 may not occupy the space required by the first piezoelectric unit 40 to ensure that the first piezoelectric unit 40 does not interfere with the limiting unit 50 .

In one embodiment, the first elastic piece 10 is provided with two first protruding parts 12 along the Y-axis direction as shown in FIG. The second elastic sheet 20 is provided with two second protruding portions 22 along the Y-axis direction as shown in FIG. Each of the first protruding portions 12 is disposed opposite to one of the second protruding portions 22 , and at least one limiting unit 50 is respectively disposed between the opposing first protruding portions 12 and the second protruding portions 22 . By arranging the first protruding parts 12 on both sides of the first elastic piece 10 and disposing the second protruding parts 12 on both sides of the second elastic piece 20 , the first elastic piece 10 and the second elastic piece 20 can be ensured to be limited by the position limit When the unit 50 acts as a limiting force, the first elastic piece 10 and the second elastic piece 20 can maintain a state of force balance, so as to avoid damage due to unbalanced force.

The limiting unit 50 may be a stepped cylindrical stopper 52, and the stopper 52 is a rigid material. Corresponding to the two first protruding parts 12 and the two second protruding parts 22 , the number of the stoppers 52 is four. The four stoppers 52 are respectively disposed on the first protruding portion 12 and the second protruding portion 22 . One end of any stopper 52 away from the first protruding part 12 or one end away from the second protruding part 22 , and the opposite end of the stopper 52 away from the second protruding part 22 or away from the first protruding part A limit gap 54 is formed between one end of the limit gap 54 , and the range value of the limit gap 54 can also be understood as a preset range limited by the limit unit 50 . When the limit gap 54 is reduced to zero, the gap 30 between the first elastic sheet 10 and the second elastic sheet 20 cannot be reduced any more, and the first elastic sheet 10 and the second elastic sheet 20 will no longer be bent and deformed, that is, The movement range of the first elastic piece 10 and the second elastic piece 20 is effectively limited, so as to ensure that the first piezoelectric unit 40 will not interact with the first elastic piece 10 and the second elastic piece in the expansion and contraction direction of the first piezoelectric unit 40 . Relative movement occurs between the 20, and the first piezoelectric unit 40 will not be degummed or cracked under the force. At the same time, by properly setting the limit gap 54 , it can also ensure that the first elastic piece 10 and the second elastic piece 20 have enough space to change the amplitude, and ensure that the touch feedback module 100 has enough space to generate vibration.

It can be understood that, in other embodiments, the number of the stoppers 52 on each first protruding portion 12 may also be two, three, four or more, corresponding to the second protruding portion 12 . The number of the stopper 52 on the part 22 is correspondingly two, three, four or more, and the stopper 52 on the first protruding part 12 and the stopper on the support protruding part 82 52 one-to-one corresponding settings.

It can be understood that, in other embodiments, the stopper 52 may also be a triangular prism, a quadrangular prism or other columnar structures, and may also be a truncated truncated, pyramidal or other structure.

It can be understood that, in other embodiments, the stopper 52 may also be an elastic material.

It can be understood that, in other embodiments, the first protruding portion 12 and the second protruding portion 22 may also be omitted. In this case, the stopper 52 may be disposed on the edge of the first elastic piece 10 as shown in FIG. 1 . The two side edges in the Y-axis direction and/or the two side edges in the Y-axis direction of the second elastic piece 20 as shown in FIG. 1 . Or, the size of the first piezoelectric unit 40 is reduced, and the stopper 52 is disposed on the surface of the first elastic sheet 10 close to the first piezoelectric unit 40 and/or the surface of the second elastic sheet 20 close to the first piezoelectric unit 40 On the other hand, since the size of the first piezoelectric unit 40 is reduced, interference with the stopper 52 can be avoided.

In this embodiment, the touch feedback module 100 further includes a second piezoelectric unit 60 .

The first piezoelectric unit 40 may be a piezoelectric film, piezoelectric ceramics, or other components capable of generating piezoelectric effects. The first piezoelectric unit 40 is used to provide vibration feedback, and the second piezoelectric unit 60 is used to detect the load force. The second piezoelectric unit 60 is disposed on the side of the first elastic sheet 10 close to the first piezoelectric unit 40 . In this way, a second piezoelectric unit 60 is provided on the side of the first elastic sheet 10 close to the first piezoelectric unit 40 . The second piezoelectric unit 60 is used to detect the load force on the first elastic sheet 10 . When the user presses the first elastic sheet 10, the second piezoelectric unit 60 is deformed following the deformation of the first elastic piece 10, and the second piezoelectric unit 60 generates a voltage signal through the positive piezoelectric effect to realize the detection of the load force, thereby improving the detection of the touch feedback module 100. The accuracy of the load force is helpful for regulating the threshold voltage of the touch feedback module 100 for starting vibration.

In one embodiment, the minimum threshold voltage of the first piezoelectric unit 40 can be set as V1, and the corresponding load force is F1. However, due to the elastic connection between the first elastic sheet 10 and the first piezoelectric unit 40, the load force on the first elastic sheet 10 cannot be completely transferred to the first piezoelectric unit 40. Therefore, when the load applied by the user is At F1, the load force detected by the first piezoelectric unit 40 may not necessarily reach F1, and the first piezoelectric unit 40 cannot generate a voltage signal. Accordingly, the touch feedback module 100 cannot provide vibration feedback; When the load applied by the user is greater than F1, and the load force is transmitted to the first piezoelectric unit 40, correspondingly, it is possible to reach the start-up threshold voltage V1 of the first piezoelectric unit 40. Therefore, the touch feedback module 100 The load force detection accuracy is not high, which affects the user experience. By arranging the second piezoelectric unit 60 on the side of the first elastic sheet 10 close to the first piezoelectric unit 40, when the load force applied by the user is F1, since the second piezoelectric unit 60 is directly connected with the first elastic sheet 10, And the second piezoelectric unit 60 can directly follow the deformation of the first elastic piece 10 and deform. Therefore, the second piezoelectric unit 60 can detect that the load force is F1, and the second piezoelectric unit 60 generates a voltage signal through the positive piezoelectric effect. , so as to realize pressure detection, and the touch feedback module 100 further applies a voltage signal to the first piezoelectric unit 40 according to the voltage signal of the second piezoelectric unit 60 , so that the first piezoelectric unit 40 generates electricity through the inverse piezoelectric effect. The elastic deformation of the first elastic piece 10 and the second elastic piece 20 is caused to expand or contract, and finally the expansion and contraction of the first piezoelectric unit 40 in the horizontal direction is converted into the vertical expansion and contraction of the first elastic piece 10 and the second elastic piece 20. vibration.

It can be understood that, in other embodiments, the second piezoelectric unit 60 may also be disposed on the side of the second elastic sheet 20 close to the first piezoelectric unit 40 . Alternatively, the number of the second piezoelectric units 60 is two, which are respectively disposed on the side of the first elastic sheet 10 close to the first piezoelectric unit 40 and the side of the second elastic sheet 20 close to the first piezoelectric unit 40 .

In this embodiment, the touch feedback module 100 further includes a positioning member 70 .

The positioning member 70 is substantially cylindrical. The positioning member 70 is disposed on the side of the first elastic sheet 10 away from the first piezoelectric unit 40 . In this way, by disposing the positioning member 70 on the side of the first elastic sheet 10 away from the first piezoelectric unit 40, when assembling the touch feedback module 100, a positioning groove corresponding to the positioning member 70 is set at the position to be assembled (not shown in the figure). shown), fill the glue into the positioning groove, and insert the positioning member 70 into the corresponding positioning groove, so as to control the problem of glue overflowing and uneven thickness of the glue; the installation of the touch feedback module 100 can also be performed. Effective positioning improves the fitting precision of the touch feedback module 100 . Wherein, the glue is epoxy resin or phenolic resin.

It can be understood that, in other embodiments, the number of the positioning members 70 may also be two, three, four or more. The positioning member 70 may also be disposed on the side of the second elastic sheet 20 away from the first piezoelectric unit 40 . Alternatively, the positioning members 70 are respectively disposed on the side of the first elastic sheet 10 facing away from the first piezoelectric unit 40 and on the side of the second elastic sheet 20 facing away from the second piezoelectric unit 60 .

It can be understood that, in other embodiments, the positioning member 70 can also be trapezoidal, conical or the like.

In this embodiment, the touch feedback module 100 further includes a support member 80 .

The support member 80 is substantially plate-shaped, and is used for connecting with the touch feedback module 100 , and the touch feedback module 100 is mounted on other components through the support member 80 . The support member 80 is disposed on the side of the second elastic sheet 20 away from the first piezoelectric unit 40 . The middle area of the second elastic sheet 20 is fixedly connected to the support member 80 by connecting members such as screws 84 . The screw 84 penetrates the locking support 80 and the second elastic piece 20 , which is beneficial to improve the connection strength between the support 80 and the second elastic piece 20 .

It can be understood that, in other embodiments, the second elastic sheet 20 may also be fixedly connected to the support member 80 by a connection means such as fixing glue, double-sided tape, or the like.

Please refer to FIG. 4 , which is a schematic front view of a touch feedback module 200 according to a second embodiment of the present application. The touch feedback module 200 provided in this embodiment is substantially similar in structure to the touch feedback module 100 provided in the first embodiment. The member 56 can be a spring, and the elastic member 56 is connected between the first protruding portion 12 and the second protruding portion 22 corresponding to the first protruding portion 12 . The number of the elastic members 56 is two, which are respectively disposed between a first protruding portion 12 and a corresponding second protruding portion 22 . The two protruding parts 22 are connected. In the natural state of the elastic member 56, the first elastic piece 10 and the second elastic piece 20 are just in a state of not being stressed.

When the first elastic piece 10 or the second elastic piece 20 is subjected to a load force, the elastic piece 56 shrinks following the deformation of the first elastic piece 10 or the second elastic piece 20 until the elastic piece 56 can no longer shrink. The two elastic pieces 20 can no longer move toward each other, and the first elastic piece 10 and the second elastic piece 20 cannot be further deformed. When the load force disappears, the first elastic piece 10 and the second elastic piece 20 return to their original positions again under the action of the elastic force of the elastic member 56 and their respective corresponding elastic forces.

When the first piezoelectric unit 40 generates electrostriction through the inverse piezoelectric effect, and finally drives the first elastic sheet 10 and the second elastic sheet 20 to vibrate, the elastic member 56 can be applied to the opposite side of the first elastic sheet 10 and the second elastic sheet 20 The acting force can effectively speed up the recovery speed of the first elastic piece 10 and the second elastic piece 20 , increase the vibration frequency of the touch feedback module 200 , and improve the user experience. In addition, when the load force disappears and the touch feedback module 200 stops vibrating, the elastic member 56 can quickly restore the first elastic piece 10 and the second elastic piece 20 to their original positions due to the elastic force of the elastic member 56 . Therefore, the elastic member 56 is also beneficial to shorten the The trailing vibration time of the touch feedback module 200 makes the stop vibration of the touch feedback module 200 neat and tidy. It can be understood that, in other embodiments, the elastic member 56 may also be a material capable of generating deformation such as rubber. It should be noted that both ends of the elastic member 56 still need to be connected to the first protruding portion 12 and the second protruding portion 22 corresponding to the first protruding portion 12 , respectively.

It can be understood that, in other embodiments, the first protruding portion 12 and the second protruding portion 22 can also be omitted. In this case, the elastic member 56 can be connected to the edge of the first elastic piece 10 as shown in FIG. 1 . The edges on both sides of the Y-axis direction and/or the opposite sides of the second elastic piece 20 along the Y-axis direction as shown in FIG. 1 . Or, reduce the size of the first piezoelectric unit 40 and connect the elastic member 56 to the surface of the first elastic sheet 10 close to the first piezoelectric unit 40 and the surface of the second elastic sheet 20 close to the first piezoelectric unit 40, because The size of the first piezoelectric unit 40 is reduced to avoid interference with the elastic member 56 .

It can be understood that, in other embodiments, all the limiting units 50 may be partially stopper 52 and partially elastic member 56 , the number of elastic members 56 is one, the number of stoppers 52 is two, and one Both ends of the elastic member 56 are respectively connected with a first protruding portion 12 and a second protruding portion 22 corresponding to the first protruding portion 12 ; the two stoppers 52 are respectively connected with another first protruding portion 22 . The part 12 is connected with another second protruding part 22 .

Please refer to FIG. 5 , which is a schematic front view of a touch feedback module 300 according to a third embodiment of the present application. The touch feedback module 300 provided in this embodiment is substantially similar in structure to the touch feedback module 100 provided in the first embodiment. The difference is that in this embodiment, the limiting unit 50 may be a stepped cylindrical stopper. The stopper 52, the stopper 52 is a rigid material, the number of the stopper 52 is two, one end of the two stopper 52 is respectively set on the two first protruding parts 12, the two stopper 52 The other end extends toward the second protruding portion 22 , and there is a limit gap 54 between each stopper 52 and the opposite second protruding portion 22 .

It can be understood that, in other embodiments, one end of the two stoppers 52 may also be disposed on the second protruding portion 22 , and the other ends of the two stoppers 52 extend toward the first elastic piece 10 . There is a limit gap 54 between the stopper 52 and the opposite first protruding portion 12 . Alternatively, one of the stoppers 52 is provided on a first protruding portion 12 , and the other stopper 52 is provided on a second protruding portion 22 , and the first protruding portion 12 of the stopper 52 is provided with the The two protruding portions 22 are not arranged opposite to each other.

Please refer to FIG. 6 and FIG. 7 together. FIG. 6 is a schematic perspective view of a touch feedback module provided by the fourth embodiment of the application, and FIG. 7 is a front schematic view of the touch feedback module provided by the fourth embodiment of the application. . The touch feedback module 400 provided in this embodiment is substantially similar in structure to the touch feedback module 100 provided in the first embodiment. Two first protruding parts 12 are provided in the Y-axis direction, that is, the two first protruding parts 12 are located on both sides of the first elastic piece 10 respectively. The support member 80 is provided with two support protrusions 82 along the Y-axis direction as shown in FIG. 6 , that is, the two support protrusions 82 are located on two sides of the support member 80 respectively. Each of the first protrusions 12 is disposed opposite one of the support protrusions 82 . It should be noted that, in this embodiment, the second elastic sheet 20 is not provided with a protruding portion, however, the limiting unit 50 can still be considered to be provided between the first elastic sheet 10 and the second elastic sheet 20 .

The limiting unit 50 can be a stepped cylindrical stopper 52, the stopper 52 is a rigid material, the number of the stopper 52 is four, and the four stopper 52 are respectively disposed on the first protruding part 12 and the support on the protruding part 82 . One end of any stopper 52 away from the first protruding part 12 or one end away from the second protruding part 22 , and the opposite end of the stopper 52 away from the second protruding part 22 or away from the first protruding part A limit gap 54 is formed between one end of the 12 . When the limit gap 54 is reduced to zero, the first elastic piece 10 will no longer be bent and deformed, and the gap 30 between the first elastic piece 10 and the second elastic piece 20 is also guaranteed to be within a preset range, thereby further ensuring that The first piezoelectric unit 40 will not move relative to the first elastic sheet 10 and the second elastic sheet 20 , and the first piezoelectric unit 40 will not be degummed or cracked under the force.

It can be understood that, in other embodiments, the number of stoppers 52 on each first protruding portion 12 may also be two, three, four or more, corresponding to the supporting protruding portion. The number of the stopper 52 on the 82 is correspondingly two, three, four or more, and the stopper 52 on the first protruding part 12 and the stopper 52 on the support protruding part 82 One-to-one corresponding settings.

Please refer to FIG. 8 , which is a schematic front view of a touch feedback module provided by a fifth embodiment of the present application. The touch feedback module 500 provided in this embodiment is substantially similar in structure to the touch feedback module 100 provided in the first embodiment, except that in this embodiment, the number of the second piezoelectric units 60 is two The two second piezoelectric units 60 are respectively disposed on the side of the first elastic sheet 10 close to the first piezoelectric unit 40 and the side of the second elastic sheet 20 close to the first piezoelectric unit 40 . In this way, the detection accuracy of the load force of the touch feedback module 500 can be further improved, which is beneficial to the regulation of the threshold voltage of the first piezoelectric unit 40 to vibrate.

It can be understood that, in other embodiments, the number of the second piezoelectric unit 60 is one, and it is only disposed on the side of the second elastic sheet 20 close to the first piezoelectric unit 40 . It should be noted that when the second piezoelectric unit 60 is only arranged on the second elastic sheet 20, it is preferably arranged at a position on the second elastic sheet 20 that is not connected to other components. For example, the second piezoelectric unit 60 is arranged on the second elastic sheet 20 between one of the ends and the middle area.

Please refer to FIG. 9 , which is a schematic front view of a touch feedback module provided by a sixth embodiment of the present application. The touch feedback module 600 provided in this embodiment is substantially similar in structure to the touch feedback module 100 provided in the first embodiment, and the difference is that in this embodiment, the number of positioning members 70 is two, and the It is arranged on the side of the first elastic sheet 10 away from the first piezoelectric unit 40 and the side of the second elastic sheet 20 away from the first piezoelectric unit 40 . In this way, by disposing a positioning member 70 on the first elastic sheet 10 and the second elastic sheet 20 respectively, it is beneficial to install and position the touch feedback module 100 .

It can be understood that in other embodiments, the number of the positioning pieces 70 on the first elastic piece 10 may be two, three, four or more; the number of the positioning pieces 70 on the second elastic piece 20 may be Two, three, four or more. The number of the positioning pieces 70 on the first elastic piece 10 and the number of the positioning pieces 70 on the second elastic piece 20 may or may not be equal.

Please refer to FIG. 10 , which is a schematic front view of a touch feedback module provided by a seventh embodiment of the present application. The touch feedback module 700 provided in this embodiment is substantially similar in structure to the touch feedback module 100 provided in the first embodiment, and the difference is that in this embodiment, the number of the positioning members 70 is Three, three positioning members 70 are disposed on the side of the first elastic sheet 10 away from the first piezoelectric unit 40 , and the three positioning members 70 are arranged side by side. In this way, the touch feedback module 100 is installed and positioned through the three positioning members 70.

It can be understood that, in other embodiments, the three positioning members 70 may also be arranged in a triangle or in other combinations.

It can be understood that in other embodiments, the number of positioning members 70 may also be two, four, five or more, and multiple positioning members 70 may be arranged side by side, arranged regularly or irregularly. .

It can be understood that, in other embodiments, the positioning member 70 can also be trapezoidal, conical or the like. The shape of each positioning member 70 may be different. For example, when the number of positioning members 70 is three, two positioning members 70 are cylindrical and the other is trapezoidal; or, one is cylindrical and the other is trapezoidal. , one is conical.

Please refer to FIG. 11 , which is a schematic front view of a touch feedback module provided by an eighth embodiment of the present application. The touch feedback module 800 provided in this embodiment is substantially similar in structure to the touch feedback module 100 provided in the first embodiment, and the difference is that in this embodiment, the first elastic piece 10 is away from the first piezoelectric unit 40 . A positioning member 70 is provided on one side of the telecommunication device, and the touch feedback module 800 is directly mounted on other components through the second elastic sheet 20 .

Referring to FIG. 12 , a ninth embodiment of the present application provides an electronic device. The electronic device 1000 includes a middle frame 900 and any touch feedback module from the first embodiment to the eighth embodiment. This embodiment is described by taking the touch feedback module 100 of the first embodiment as an example. The touch feedback module 100 is disposed on the middle frame 900 and is used as a side button of the electronic device 1000 . Specifically, the touch feedback module 100 is positioned and installed on the middle frame 900 through the positioning member 70 , and is correspondingly installed on other components of the electronic device 1000 through the support member 80 .

In the touch feedback module 100 of the electronic device 1000 described above, by disposing at least one limiting unit 50 between the first elastic piece 10 and the second elastic piece 20 , when the user presses the first elastic piece 10 or the second elastic piece 20 , the first elastic piece 10 Or the second elastic sheet 20 is subjected to bending and deformation along the vibration direction of the first elastic sheet 10 and the second elastic sheet 20, the first elastic sheet 10 and the second elastic sheet 20 drive the first piezoelectric unit 40 to deform, and the first piezoelectric unit 40 passes through The positive piezoelectric effect generates a voltage signal, thereby realizing the detection of the load force. At the same time, the first elastic piece 10 and the second elastic piece 20 move toward each other along the vibration direction of the first elastic piece 10 and the second elastic piece 20, and the gap 30 (the first gap 32 and The second gap 34) will gradually decrease. When the load is large, the amount of deformation caused by the bending deformation of the first elastic piece 10 or the second elastic piece 20 is larger, and the gap 30 between the first elastic piece 10 and the second elastic piece 20 will become smaller. When the limit unit 50 stops the gap 30 between the first elastic piece 10 and the second elastic piece 20 within a preset range, so that the deformation amount of the first elastic piece 10 or the second elastic piece 20 caused by the bending deformation due to the force is within within the preset range, thereby preventing the first elastic sheet 10 or the second elastic sheet 20 from further deforming, and further preventing the first elastic sheet 10 and/or the second elastic sheet 20 and the first piezoelectric unit 40 along the first piezoelectric unit 40 The relative movement occurs in the expansion and contraction direction of the first piezoelectric unit 40 to prevent the first piezoelectric unit 40 from being degummed and cracked due to the small contact area between the connection area 42 of the first piezoelectric unit 40 and the first elastic sheet 10 and the second elastic sheet 20. question.

In this embodiment, the touch feedback module 100 can realize functions such as fingerprint recognition, power-on, power-off, pressure sensing, touch vibration feedback, etc., and has relatively many functions, which can satisfy the user's pursuit of realizing more functions in the same operation, and improve the user experience. experience.

In this embodiment, the electronic device 1000 includes, but is not limited to, a mobile phone, a vehicle-mounted central control panel, a notebook computer, and the like.

It will be apparent to those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Accordingly, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the application is to be defined by the appended claims rather than the foregoing description, which is therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in this application.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limitations. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be Modifications or equivalent substitutions can be made without departing from the spirit and scope of the technical solutions of the present application.

Claims

A touch feedback module, comprising:

A first piezoelectric unit, along the expansion and contraction direction of the first piezoelectric unit, the first piezoelectric unit includes a connection area provided at both ends of the first piezoelectric unit, and located between the two connection areas the functional area;

A first elastic sheet is arranged on one side of the first piezoelectric unit, two ends of the first elastic sheet are respectively connected with the connection areas at both ends of the first piezoelectric unit, and the first elastic sheet is connected to the There is a first gap between the functional areas of the first piezoelectric unit;

The second elastic sheet is arranged on the side of the first piezoelectric unit away from the first elastic sheet, and the two ends of the second elastic sheet are respectively connected with the connection areas at both ends of the first piezoelectric unit, and the There is a second gap between the second elastic piece and the functional area of the first piezoelectric unit; and

At least one limiting unit, the at least one limiting unit is arranged between the first elastic piece and the second elastic piece, and is used to limit the movement range of the first elastic piece and the second elastic piece so that the The first gap and the second gap between the first elastic piece and the second elastic piece are within a preset range.
1. The touch feedback module according to claim 1, wherein a direction perpendicular to the stretching direction of the first piezoelectric unit and the vibration direction of the first elastic sheet and the second elastic sheet In the perpendicular direction, first protruding parts are respectively provided on both sides of the first elastic piece, and second protruding parts are respectively provided on both sides of the second elastic piece. The two protruding portions are in one-to-one correspondence and are oppositely arranged, and the at least one limiting unit is disposed between the first protruding portion and the corresponding second protruding portion, wherein the first piezoelectric unit is The expansion and contraction direction is perpendicular to the vibration direction of the first elastic sheet and the second elastic sheet.
The touch feedback module of claim 2, wherein the limiting unit is disposed on the first protruding portion and the second protruding portion opposite to the first protruding portion , the end of the limiting unit on the first protruding part is far away from the first protruding part, and the limit unit on the second protruding part is far away from the second protruding part A limit gap is formed between one end, or, when the limit unit is arranged on the first protruding portion or the second protruding portion, the limit unit is away from the end of the first protruding portion or A limit gap is formed between one end away from the second protruding portion and the corresponding second protruding portion or with the corresponding first protruding portion.
The touch feedback module according to claim 1, wherein the touch feedback module further comprises:

The second piezoelectric unit is disposed on the side of the first elastic sheet close to the first piezoelectric unit and/or the side of the second elastic sheet close to the first piezoelectric unit.
The touch feedback module according to claim 1, wherein the touch feedback module further comprises:

At least one positioning member is arranged on a side of the first elastic sheet and/or the second elastic sheet away from the first piezoelectric unit.
The touch feedback module according to claim 1, wherein the touch feedback module further comprises:

The supporting member is arranged on the side of the second elastic sheet away from the first piezoelectric unit.
6. The touch feedback module according to claim 6, wherein a direction perpendicular to the stretching direction of the first piezoelectric unit and a vibration direction of the first elastic sheet and the second elastic sheet In the perpendicular direction, first protruding portions are respectively provided on both sides of the first elastic piece, and supporting protruding portions are respectively provided on both sides of the support member, and the first protruding portion and the supporting protruding portion are respectively provided. The at least one limiting unit is arranged between the first protruding part and the corresponding supporting protruding part, wherein the expansion and contraction direction of the first piezoelectric unit is related to the The vibration directions of the first elastic piece and the second elastic piece are perpendicular to each other.
The touch feedback module according to claim 7, wherein when the limiting unit is disposed on the first protruding portion and the supporting protruding portion opposite to the first protruding portion, between an end of the limiting unit on the first protruding portion away from the first protruding portion and an end of the limiting unit on the supporting protruding portion away from the supporting protruding portion A limit gap is formed, or, when the limit unit is disposed on the first protrusion or the support protrusion, the limit unit is away from one end of the first protrusion or away from the support A limit gap is formed between one end of the protruding portion and the corresponding supporting protruding portion or with the corresponding first protruding portion.
The touch feedback module according to claim 1, wherein the limiting unit is an elastic piece, and the elastic piece is connected between the first elastic piece and the second elastic piece.
An electronic device, comprising the touch feedback module according to any one of claims 1-9.