CN216052964U - Piezoelectric unit, touch feedback module and electronic equipment - Google Patents

Abstract

The utility model discloses a piezoelectric unit, a touch feedback module and electronic equipment, wherein the piezoelectric unit is used for the touch feedback module, the touch feedback module also comprises a first plate and a second plate which are arranged oppositely and at an interval, the piezoelectric unit is connected between the first plate and the second plate, and the piezoelectric unit comprises: the shell fragment, the shell fragment includes the main part and sets up in the first kink and the second kink of the relative both sides of main part, and the first side of main part passes through first kink and first board elasticity and links to each other, and the second side of main part passes through the second kink and second board elasticity and links to each other, and piezoelectric element sets up in the first side and/or the second side of main part, and separates the setting with first board and second board. According to the piezoelectric unit, the first bending part and the second bending part are arranged, so that the elastic buffering capacity of the elastic sheet can be improved, and the stability of the touch control feedback module can be improved.

Description

Piezoelectric unit, touch feedback module and electronic equipment

Technical Field

The utility model relates to the technical field of touch control, in particular to a piezoelectric unit, a touch control feedback module and electronic equipment.

Background

In the related art, the piezoelectric unit is usually assembled by a piezoelectric element and a spring plate, and the conventional piezoelectric unit has a simple structure, and when a reliability test is performed, it is found that when a user presses a touch area of the touch feedback module, the spring plate is bent and deformed, and when an applied load force is large or deformation caused by electrostriction of the piezoelectric element is large, the piezoelectric unit is easily subjected to problems such as degumming and the like, and falls off from the touch feedback module, so that the touch feedback module fails.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the present invention provides a piezoelectric unit, which can improve the elastic buffering capacity of the elastic sheet and improve the stability of the touch feedback module by providing the first bending portion and the second bending portion.

The utility model further provides a touch feedback module with the piezoelectric unit.

The utility model further provides an electronic device with the touch feedback module.

According to the piezoelectric unit of the embodiment of the present invention, the piezoelectric unit is used for a touch feedback module, the touch feedback module further includes a first plate and a second plate which are arranged oppositely and at an interval, the piezoelectric unit is connected between the first plate and the second plate, and the piezoelectric unit includes: the elastic sheet comprises a main body part, a first bent part and a second bent part, wherein the first bent part and the second bent part are arranged on two opposite sides of the main body part, the first side of the main body part is elastically connected with the first plate through the first bent part so that the first side of the main body part is spaced from the first plate and has a movable stroke along a first direction, and the second side of the main body part is elastically connected with the second plate through the second bent part so that the second side of the main body part is spaced from the second plate and has a movable formation along the first direction; wherein the first direction is a direction perpendicular to the first board surface; and a piezoelectric element disposed on the first side and/or the second side of the body portion and spaced apart from the first plate and the second plate.

According to the piezoelectric unit provided by the embodiment of the utility model, the first bending part and the second bending part are arranged, the main body part of the elastic sheet is elastically connected with the first plate through the first bending part, and the main body part of the elastic sheet is elastically connected with the second plate through the second bending part, so that on one hand, the load force of external force pressing on the piezoelectric unit can be dispersed, and the deformation amount of pressing is reduced, so that the piezoelectric unit is protected, and the piezoelectric unit is prevented from falling off or breaking due to overlarge deformation. Meanwhile, the connecting area between the elastic sheet and the second plate can be increased by increasing the second bending part, so that the connecting strength between the elastic sheet and the second plate is enhanced, and the piezoelectric unit is prevented from falling off from the touch control feedback module due to the fact that the elastic sheet is deformed greatly.

In some embodiments, the main body portion, the first bend portion, and the second bend portion are one piece. It can be understood that the elastic sheet can be integrally formed through an integral forming process, so that the processes of production, manufacture and assembly of the piezoelectric unit are simplified.

In some embodiments, one end of the first bending part is connected to the outer periphery of the main body part, and the other end of the first bending part is bent toward a direction close to the center of the main body part, or one end of the first bending part is connected to the outer periphery of the main body part, and the other end of the first bending part is bent toward a direction away from the center of the main body part; one end of the second bending part is connected with the outer periphery of the main body part, and the other end of the second bending part is bent towards the direction close to the center of the main body part, or one end of the second bending part is connected with the outer periphery of the main body part, and the other end of the second bending part is bent towards the direction far away from the center of the main body part. From this, the area that the main part is connected through first kink and first board is bigger, further strengthen the adhesive strength between shell fragment and the first board, and simultaneously, the area that the main part is connected through second kink and second board is bigger, further strengthen the adhesive strength between shell fragment and the second board, it comes unstuck to avoid shell fragment deformation when great, lead to piezoelectric unit to drop from touch-control feedback module, and, the other end orientation of first kink is buckled near the direction at the center of main part, the other end orientation of second kink is buckled near the direction at the center of main part, can reduce the volume that the shell fragment occupied in piezoelectric unit, be favorable to piezoelectric unit's miniaturization.

In some embodiments, the first bent portion is a plurality of first bent portions arranged at intervals in the circumferential direction of the main body portion, and/or the second bent portion is a plurality of second bent portions arranged at intervals in the circumferential direction of the main body portion; the first bent portion and the second bent portion are arranged at intervals in a circumferential direction of the main body portion. It can be understood that setting up a plurality of second kink and can further strengthening the adhesive strength between shell fragment and the second board, avoiding shell fragment deformation to come unstuck when great, leading to piezoelectric unit to drop from touch-control feedback module, simultaneously, setting up a plurality of second kink that arrange at main part circumference interval, can increase the stability of shell fragment, avoid when piezoelectric unit is pressed to the external force, the shell fragment takes place to incline and leads to piezoelectric unit to become invalid and drops.

In some embodiments, further comprising: the first buffer piece is connected between the main body part and the second plate, and the second bent part surrounds the first buffer piece. It can be understood that the first buffer member is arranged between the main body part and the second plate, so that the adhesive strength between the elastic sheet and the second plate can be further enhanced, and the stability of the touch feedback module is improved; and, a plurality of second kink encircle first bolster setting, and the second kink sets up the position evenly, can increase the stability of shell fragment, avoids when the piezoelectric unit is pressed to the external force, and the shell fragment takes place the slope and leads to the piezoelectric unit inefficacy to drop.

In some embodiments, further comprising: the flexible circuit board is connected with the main body part and the first bending part in a stacked mode, the piezoelectric element is electrically connected with the flexible circuit board, a first connecting hole is formed in the first bending part, a second connecting hole is formed in the flexible circuit board, and the first connecting hole and the second connecting hole are arranged oppositely. It can be understood that when the piezoelectric unit is fixed on the first plate through the surface mounting process, the contact area between the solder paste for connection and the piezoelectric unit can be effectively increased through the first connection hole and the second connection hole which are oppositely arranged, and the adhesive strength between the solder paste and the piezoelectric unit is enhanced.

In some embodiments, further comprising: the riveting piece penetrates through the first connecting hole and the second connecting hole to connect the first bending part and the flexible circuit board. It can be understood that the riveting pieces are arranged at the first connecting hole and the second connecting hole, so that the bonding strength between the flexible circuit board and the elastic sheet can be enhanced, and the flexible circuit board is prevented from falling off from the elastic sheet; the riveting piece can increase the distance between the first bending part and the first plate, when the piezoelectric unit is fixed to the first plate through the surface mounting process, the thickness and the using amount of solder paste for connection can be increased, the bonding strength between the piezoelectric unit and the first plate is enhanced, and meanwhile, the influence of the warping of the first plate and the elastic piece on the surface mounting process is reduced.

In some embodiments, the rivet member is provided with a through hole, and the through hole penetrates through the rivet member in the direction in which the first bending portion and the flexible circuit board are stacked. It can be understood that when the piezoelectric unit is fixed to the first plate through the surface mounting process, through the through hole formed in the riveting piece, the contact area between the solder paste for connection and the piezoelectric unit can be effectively increased, the bonding strength between the solder paste and the piezoelectric unit is further enhanced, meanwhile, the distance between the first bending portion and the first plate can be increased through the riveting piece, the thickness and the using amount of the solder paste for connection are increased, and meanwhile, the influence of the warping of the first plate and the elastic piece on the surface mounting process is reduced.

The touch feedback module according to the embodiment of the utility model comprises: the piezoelectric unit is connected between the first plate and the second plate, wherein the first plate is a circuit board, the second plate is a supporting plate, or the first plate is the circuit board, and the second plate is a touch pad.

According to the touch feedback module provided by the embodiment of the utility model, the piezoelectric unit is arranged, so that the bonding strength between the piezoelectric unit and the second plate can be enhanced, and the piezoelectric unit is prevented from falling off from the touch feedback module; simultaneously, utilize the second portion of buckling to carry out elastic connection between shell fragment and the second board, can disperse external force and press the loading power to the piezo-electric element on the one hand, reduce the deformation volume of pressing to protect piezo-electric element, avoid piezo-electric element to split because of too big deformation, on the other hand, when piezo-electric element leads to producing sudden deformation because of reasons such as falling, elastic connection's main part and second board can effectively cushion, increase touch-control feedback module's stability.

An electronic device according to an embodiment of the present invention includes: the touch feedback module is provided.

According to the electronic equipment provided by the embodiment of the utility model, the touch feedback module is arranged, so that the stability of the electronic equipment can be enhanced, and the user experience is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is an exploded schematic view of a piezoelectric unit according to one embodiment of the present invention;

FIG. 2 is a schematic perspective view of a piezoelectric unit according to one embodiment of the present invention;

FIG. 3 is a bottom view of a piezoelectric element according to one embodiment of the present invention;

FIG. 4 is a schematic view of a spring plate according to one embodiment of the utility model;

FIG. 5 is a schematic view of a spring plate according to another embodiment of the utility model;

FIG. 6 is a schematic diagram of a flexible circuit board according to one embodiment of the present invention;

FIG. 7 is a schematic view of a spring according to yet another embodiment of the utility model;

FIG. 8 is a schematic view of a rivet according to one embodiment of the present invention;

FIG. 9 is an exploded view of a touch feedback device according to an embodiment of the present invention;

fig. 10 is a schematic perspective view of a touch feedback device according to an embodiment of the utility model.

Reference numerals:

a piezoelectric unit 100; a piezoelectric element 10; a flexible circuit board 20; a spring plate 30; a first bent portion 31; a main body portion 32; a second bent section 33; a first cushion member 40; the second cushion member 41; a first connection hole 311; a second connection hole 312; a rivet 313; a first flap 3131; riveting tube 3132; a second flap 3133; a through-hole 314;

a touch feedback module 1000; a touch panel 300; a wiring board 200; an elastic block 400; supporting the board 500.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

Referring to fig. 1 to 10, a piezoelectric unit 100 according to an embodiment of the present invention is described, the piezoelectric unit 100 is used in a touch feedback module 1000, the touch feedback module 1000 further includes a first plate and a second plate disposed opposite to each other and spaced apart from each other, and the piezoelectric unit 100 is connected between the first plate and the second plate. When the first plate or the second plate in the touch feedback module 1000 is pressed by an external force, the piezoelectric unit 100 deforms and converts the deformation into an electrical signal to sense external touch information, and/or when the first plate or the second plate in the touch feedback module 1000 is pressed by an external force, the touch feedback module 1000 is powered on the piezoelectric element 10 to generate vibration feedback, so that user experience is improved.

As shown in fig. 1 to 9, the piezoelectric unit 100 includes a piezoelectric element 10 and a spring sheet 30, wherein the piezoelectric element 10 is electrically connected to the circuit board 200 of the touch feedback module 1000; the elastic sheet 30 includes a main body portion 32, and a first bending portion 31 and a second bending portion 33 disposed on two opposite sides of the main body portion 32, one side of the main body portion 32 is elastically connected to the first plate through the first bending portion 31, so that the first side of the main body portion 32 is spaced from the first plate and has a moving stroke along a first direction (e.g., a z direction shown in fig. 1), the other side of the main body portion 32 is elastically connected to the second plate through the second bending portion 33, so that the second side of the main body portion 32 is spaced from the second plate and has a moving stroke along the first direction, and the first direction is a direction perpendicular to the surface of the first plate. It can be understood that the elastic connection means that the first bending portion 31 and the second bending portion 33 can generate elastic deformation with restorability, so as to provide a space for deformation of the main body portion 32 of the elastic sheet 30, so as to implement the function of touch feedback or touch detection of the piezoelectric unit 100. Of course, the embodiment of the present invention is not limited thereto, and the elastic connection may be made by using an elastic material such as foam or rubber. The first bent portion 31 and the second bent portion 33 may be disposed around the main body portion 32, or the first bent portion 31 and the second bent portion 33 may be disposed on the main body portion 32; the first bent portion 31 and the second bent portion 33 may be connected to the same position as the main body portion 32 or may be connected to different positions from the main body portion 32.

As shown in fig. 1, the piezoelectric element 10 is disposed on the first side and/or the second side of the main body portion 32, and is disposed at a distance from the first plate and the second plate, it is understood that the piezoelectric element 10 may be disposed on the first side of the main body portion 32, the piezoelectric element 10 may be disposed on the second side of the main body portion 32, or two piezoelectric elements 10 may be disposed, one piezoelectric element 10 is disposed on the first side of the main body portion 32, and the other piezoelectric element 10 is disposed on the second side of the main body portion 32.

It should be noted that, as shown in fig. 4 and fig. 9, the first board may be the circuit board 200 of the touch feedback module 1000, the second board may be one of the touch pad 300 and the supporting board 500 of the touch feedback module 1000, specifically, for example, as shown in fig. 9, the first board is the circuit board 200, the second board is the supporting board 500, the piezoelectric unit 100 is disposed between the circuit board 200 and the supporting board 500, one side of the main body portion 32 is elastically connected to the circuit board 200 through the first bending portion 31, the other side of the main body portion 32 is elastically connected to the supporting board 500 through the second bending portion 33, and the touch pad 300 is disposed on one side of the circuit board 200 away from the supporting board 500. It can be understood that the first board may also be the circuit board 200, the second board may also be the touch pad 300, the piezoelectric unit 100 is disposed between the circuit board 200 and the touch pad 300, one side of the main body portion 32 is elastically connected to the circuit board 200 through the first bending portion 31, the other side of the main body portion 32 is elastically connected to the touch pad 300 through the second bending portion 33, and the supporting board 500 is disposed on the side of the circuit board 200 away from the touch pad 300.

The inventor finds in practical research that when a load force applied to the piezoelectric unit is large or an electrostrictive deformation amount is large, deformation of the elastic sheet is large, so that the piezoelectric unit is prone to problems such as degumming and the like, and falls off from the touch feedback module, and the touch feedback module fails.

In view of this, the embodiment of the utility model provides a piezoelectric unit 100, in which a first bending portion 31 and a second bending portion 33 are provided, and a main portion 32 of a resilient plate 30 is elastically connected to a first plate through the first bending portion 31, and a main portion 32 of the resilient plate 30 is elastically connected to a second plate through the second bending portion 33, so that on one hand, a load force applied by an external force to the piezoelectric unit 100 can be dispersed, and a deformation amount of the pressing can be reduced, thereby protecting the piezoelectric unit 100, and preventing the piezoelectric unit 100 from falling off or breaking due to an excessive deformation, on the other hand, when the piezoelectric unit 100 is suddenly deformed due to a falling, the elastically connected main portion 32 and the second plate can effectively buffer, thereby increasing stability of the touch feedback module 1000, and on the other hand, by increasing the second bending portion 33, a connection area between the resilient plate 30 and the second plate can be increased, thereby enhancing a connection strength between the resilient plate 30 and the second plate, the piezoelectric unit 100 is prevented from falling off from the touch feedback module 1000 due to large deformation of the elastic sheet 30.

As shown in fig. 4, in some embodiments, the main body portion 32, the first bend portion 31, and the second bend portion 33 are a unitary piece. It can be understood that the main body portion 32, the first bending portion 31 and the second bending portion 33 are integrally formed by bending a sheet metal part or injection molding, so that the elastic sheet 30 can be integrally formed by an integral forming process, and the production, manufacturing and assembling processes of the piezoelectric unit 100 are simplified. Of course, the embodiment of the present invention is not limited thereto, and the main body portion 32, the first bending portion 31 and the second bending portion 33 may also be separated, and connected by welding, snap connection, adhesive bonding, screw connection, etc. to form the structure of the elastic sheet 30.

With reference to fig. 4, in some embodiments, one end of the first bending portion 31 is connected to the outer periphery of the main body portion 32, and the other end of the first bending portion 31 is bent toward the center of the main body portion 32, or one end of the first bending portion 31 is connected to the outer periphery of the main body portion 32, and the other end of the first bending portion 31 is bent away from the center of the main body portion 32; further, one end of the second bent portion 33 is connected to the outer periphery of the main body portion 32, and the other end of the second bent portion 33 is bent toward a direction close to the center of the main body portion 32, or one end of the second bent portion 33 is connected to the outer periphery of the main body portion 32, and the other end of the second bent portion 33 is bent toward a direction away from the center of the main body portion 32. From this, the area that main part 32 is connected through first kink 31 and first board is bigger, further strengthen the adhesive strength between shell fragment 30 and the first board, and simultaneously, the area that main part 32 is connected through second kink 33 and second board is bigger, further strengthen the adhesive strength between shell fragment 30 and the second board, it comes unstuck to avoid shell fragment 30 deformation when great, lead to piezoelectric unit 100 to drop from touch-control feedback module 1000, and, the other end orientation of first kink 31 is buckled near the direction of the main part 32 center, the other end orientation of second kink 33 is buckled near the direction of the main part 32 center, can reduce the volume that shell fragment 30 occupied in piezoelectric unit 100, be favorable to piezoelectric unit 100's miniaturization.

It can be understood that one end of the first bending portion 31 is connected to the outer periphery of the main body portion 32, the other end of the first bending portion 31 is bent toward the direction near the center of the main body portion 32, one end of the second bending portion 33 is connected to the outer periphery of the main body portion 32, and the other end of the second bending portion 33 is bent toward the direction near the center of the main body portion 32; one end of the first bending portion 31 may be connected to the outer periphery of the main body portion 32, the other end of the first bending portion 31 may be bent toward the center of the main body portion 32, one end of the second bending portion 33 may be connected to the outer periphery of the main body portion 32, and the other end of the second bending portion 33 may be bent toward the direction away from the center of the main body portion 32; one end of the first bending portion 31 may be connected to the outer periphery of the main body portion 32, the other end of the first bending portion 31 is bent toward a direction away from the center of the main body portion 32, one end of the second bending portion 33 is connected to the outer periphery of the main body portion 32, and the other end of the second bending portion 33 is bent toward a direction close to the center of the main body portion 32; alternatively, one end of the first bending portion 31 may be connected to the outer periphery of the main body portion 32, the other end of the first bending portion 31 may be bent toward a direction away from the center of the main body portion 32, one end of the second bending portion 33 may be connected to the outer periphery of the main body portion 32, and the other end of the second bending portion 33 may be bent toward a direction away from the center of the main body portion 32. The first bent portion 31 and the second bent portion 33 may have the same shape or different shapes, and this is not particularly limited in the embodiment of the present application.

With reference to fig. 4, in some embodiments, the first bending portion 31 is a plurality of first bending portions 31 arranged at intervals in the circumferential direction of the main body portion 32, and/or the second bending portion 33 is a plurality of second bending portions 33 arranged at intervals in the circumferential direction of the main body portion 32. It is understood that the first bent portion 31 may be provided in plurality, and the second bent portion 33 may be provided in one; one first bent portion 31 may be provided, and a plurality of second bent portions 33 may be provided; the first bent portion 31 may be provided in plural, and the second bent portion 33 may be provided in plural. The first folded portion 31 and the second folded portion 33 are arranged at intervals in the circumferential direction of the main body portion 32, in other words, the first folded portion 31 and the second folded portion 33 are connected at different positions of the main body portion 32 in the circumferential direction of the main body portion 32. Of course, the present invention is not limited thereto, and the first bent portion 31 and the second bent portion 33 may be connected at the same position of the main body portion in the circumferential direction of the main body portion 32.

From this, set up a plurality of second kink 33 and can further strengthen the adhesive strength between shell fragment 30 and the second board, avoid shell fragment 30 to become unstuck when deformation is great, lead to piezoelectric unit 100 to drop from touch-control feedback module 1000, simultaneously, set up a plurality of second kink 33 that arrange at main part 32 circumference interval, can increase shell fragment 30's stability, avoid when piezoelectric unit 100 is pressed to the external force, shell fragment 30 atress is uneven leads to piezoelectric unit 100 to become invalid and drops.

It is understood that the second bending portion 33 may be provided with two, three, four, five, etc., and the first bending portion 31 may also be provided with a plurality of, for example, the first bending portion 31 is provided with two, three, four, five, etc., in the present embodiment, the first bending portion 31 and the second bending portion 33 are provided with three, the three first bending portions 31 and the three second bending portions 33 are alternately arranged at intervals in the circumferential direction of the main body portion 32, the intervals between the three first bending portions 31 are equal, and the intervals between the three second bending portions 33 are also equal.

As shown in fig. 3, in some alternative embodiments, the piezoelectric unit 100 further includes a first buffer 40, the first buffer 40 is connected between the main body portion 32 and the second plate, and the plurality of second bent portions 33 are disposed around the first buffer 40. It can be understood that the first buffer member 40 is disposed between the main body portion 32 and the second board, so that the adhesive strength between the elastic sheet 30 and the second board can be further enhanced, and the stability of the touch feedback module 1000 is improved; moreover, the plurality of second bending portions 33 are arranged around the first buffer member 40, and the arrangement positions of the second bending portions 33 are uniform, so that the stability of the elastic sheet 30 can be improved, and the piezoelectric unit 100 is prevented from falling off due to the fact that the elastic sheet 30 is stressed unevenly when the piezoelectric unit 100 is pressed by external force. Specifically, the first buffer 40 may be an elastic material such as foam, rubber, or plastic containing rubber, and the elastic material may transmit force and vibration, so as to further improve the pressure sensing and touch feedback effects.

With reference to fig. 3, further, a second buffer 41 may be disposed between the second bending portion 33 and the second board, and the second buffer 41 is used to connect the second bending portion 33 and the second board, so that when the piezoelectric unit 100 is pressed by a large external force or suddenly deforms due to a drop or the like, the second buffer 41 can effectively buffer the piezoelectric unit, further avoiding the piezoelectric element 10 from being broken due to an excessive deformation, and increasing the stability of the touch feedback module 1000, it can be understood that the second buffer 41 may also be an elastic material such as foam, rubber, or plastic containing rubber.

As shown in fig. 5-6, in some embodiments, the piezoelectric unit 100 further includes a flexible circuit board 20, the flexible circuit board 20 is connected to the main portion 32 and the first bending portion 31 of the elastic sheet 30 in a stacked manner, and the piezoelectric element 10 is electrically connected to the flexible circuit board 20. It is understood that the piezoelectric element 10 may be disposed on a side of the flexible circuit board 20 away from the spring plate 30 and directly electrically connected to the flexible circuit board 20, and the piezoelectric element 10 may also be disposed on a side of the spring plate 30 away from the flexible circuit board 20, and the piezoelectric element 10 and the flexible circuit board 20 are electrically connected by forming a through hole in the spring plate 30 and filling a conductive material into the through hole. The flexible circuit board 20 is electrically connected to the circuit board 200 in the touch feedback module 1000, so as to electrically connect the piezoelectric element 10 and the circuit board 200.

Referring to fig. 5 to fig. 6, the first bending portion 31 is provided with a first connection hole 311, the flexible circuit board 20 is provided with a second connection hole 312, and the first connection hole 311 and the second connection hole 312 are disposed opposite to each other. Therefore, when the piezoelectric unit 100 is fixed to the first plate through the surface mounting process, the contact area between the solder paste for connection and the piezoelectric unit 100 can be effectively increased through the first connection hole 311 and the second connection hole 312 which are oppositely arranged, and the adhesive strength between the solder paste and the piezoelectric unit 100 is enhanced. It is understood that the first connection hole 311 may be disposed in the middle of the first bending portion 31, the second connection hole 312 is disposed corresponding to the first connection hole 311, so as to facilitate the arrangement of the circuit on the flexible circuit board 20, the first connection hole 311 and the second connection hole 312 may be disposed in multiple numbers, and the first connection hole 311 and the second connection hole 312 may have a circular, oval, quadrilateral, or other polygonal structure, as long as the first connection hole 311 and the second connection hole 312 are disposed opposite to each other, which is not specifically limited in the embodiment of the present invention.

As shown in fig. 5 to 7, in some alternative embodiments, the piezoelectric unit 100 further includes a rivet 313, and the rivet 313 is disposed through the first connection hole 311 and the second connection hole 312 to connect the first bending part 31 and the flexible circuit board 20. It can be understood that, by providing the rivet 313 at the first connection hole 311 and the second connection hole 312, the adhesion strength between the flexible circuit board 20 and the spring plate 30 can be enhanced, and the flexible circuit board 20 is prevented from falling off the spring plate 30; meanwhile, the rivet 313 may increase a distance between the first bending portion 31 and the first plate, and when the piezoelectric unit 100 is fixed to the first plate through a surface mounting process, the thickness and the usage amount of solder paste for connection may be increased, thereby enhancing the adhesive strength between the piezoelectric unit 100 and the first plate, and simultaneously reducing the influence of warpage of the first plate and the elastic sheet 30 on the surface mounting process.

Specifically, in the present embodiment, the riveting member 313 may include a riveting tube 3132, and a first flange 3131 and a second flange 3133 connected to opposite ends of the riveting tube 3132, wherein the first flange 3131 and the second flange 3133 are respectively disposed around an outer circumferential wall of the riveting tube 3132, the riveting tube 3132 is disposed in the first connecting hole 311 and the second connecting hole 312, the first flange 3131 is disposed on a surface of the elastic sheet 30 away from the flexible circuit board 20, and the second flange 3133 is disposed on a surface of the flexible circuit board 20 away from the elastic sheet 30. Therefore, the connection strength between the flexible circuit board 20 and the elastic sheet 30 can be effectively enhanced through the abutting cooperation of the first flanging 3131 and the elastic sheet and the abutting cooperation of the second flanging 3133 and the flexible circuit board. It is understood that the first connection hole 311 and the second connection hole 312 are circular and the rivet tube 3132 is formed in a circular tube shape, but the present invention is not limited thereto, and the rivet tube 3132 may be formed in other shapes such as a quadrangular prism, a pentagonal prism, etc., as long as the rivet member 313, the first connection hole 311, and the second connection hole 312 cooperate to achieve riveting.

As shown in fig. 7, in some alternative embodiments, the rivet 313 is provided with a through hole 314, and the through hole 314 penetrates through the rivet 313 in the direction in which the first bending part 31 and the flexible circuit board 20 are stacked. Therefore, when the piezoelectric unit 100 is fixed to the first plate through the surface mounting process, the through hole 314 formed in the rivet 313 can effectively increase the contact area between the solder paste for connection and the piezoelectric unit 100, further enhance the adhesive strength between the solder paste and the piezoelectric unit 100, and meanwhile, the rivet 313 can increase the distance between the first bending portion 31 and the first plate, increase the thickness and the usage of the solder paste for connection, and reduce the influence of the warping of the first plate and the elastic sheet 30 on the surface mounting process. For example, as shown in connection with fig. 7 and 8, rivet 3132 defines through-hole 314 described above.

As shown in fig. 9, the touch feedback module 1000 according to the embodiment of the utility model includes a first board, a second board and the piezoelectric unit 100, wherein the piezoelectric unit 100 is connected between the first board and the second board, the first board is a circuit board 200, and the second board is a supporting board 500, or the first board is the circuit board 200, and the second board is a touch panel 300. It is understood that a plurality of piezoelectric units 100 may be provided, and a plurality of piezoelectric units 100 are arranged between the first plate and the second plate in an array manner, for example, two, four, six, eight, etc. piezoelectric units 100 may be provided, so that by providing the piezoelectric units 100, the adhesion strength between the piezoelectric units 100 and the second plate may be enhanced, and the piezoelectric units 100 may be prevented from falling off from the touch feedback module 1000; meanwhile, the elastic sheet 30 and the second board are elastically connected by the second bending portion 33, so that on one hand, the load force applied to the piezoelectric unit 100 by external force can be dispersed, and the deformation amount of the pressing is reduced, thereby protecting the piezoelectric element 10 and avoiding the piezoelectric element 10 from being broken due to excessive deformation, and on the other hand, when the piezoelectric unit 100 is suddenly deformed due to reasons such as falling, the main body portion 32 and the second board of the elastic connection can effectively buffer, and the stability of the touch feedback module 1000 is improved.

The electronic device according to an embodiment of the present invention includes the touch feedback module 1000. Therefore, by arranging the touch feedback module 1000, the stability of the electronic device can be enhanced, and the user experience can be improved.

The piezoelectric unit 100, the touch feedback module 1000 and the electronic device according to the present invention will be described in detail with reference to fig. 1 to 9. It is to be understood, of course, that the following description is intended to illustrate the utility model and not to limit the utility model.

As shown in fig. 9, the touch feedback module 1000 includes a touch panel 300, a circuit board 200, and a supporting board 500, which are stacked, and the piezoelectric unit 100 is further disposed in the touch feedback module 1000, the piezoelectric unit 100 is disposed between the touch panel 300 and the supporting board 500, and the piezoelectric unit 100 is electrically connected to the circuit board 200. When touch-control feedback module 1000 is pressed to the external force, piezoelectric unit 100 produces deformation to convert the deformation into the signal of telecommunication with the external touch signal of perception, and/or, when touch-control feedback module 1000 is pressed to the external force, touch-control feedback module 1000 is circular telegram in order to produce vibration feedback in piezoelectric element 10, promotes user experience.

Referring to fig. 9, the touch panel 300 and the supporting plate 500 are disposed in parallel, and a certain distance is provided between the touch panel 300 and the supporting plate 500, specifically, the touch panel 300 may be a touch screen, and may also be in other structural forms capable of implementing a touch control function, the supporting plate 500 may be an independently disposed structural member, for example, a metal plate or a plastic plate, and the supporting plate 500 may also be a structural member of the touch device that is opposite to the touch panel 300, for example, a housing of the touch device may be used as the supporting plate 500, and the circuit board 200 may be a printed circuit board, and may also be in other structural forms capable of implementing an electronic control function.

As shown in fig. 1 and 9, the piezoelectric unit 100 includes a piezoelectric element 10, a flexible circuit board 20 and a spring plate 30, the piezoelectric element 10 is disposed on one side of the spring plate 30 close to the touch panel 300, the flexible circuit board 20 may be disposed between the piezoelectric element 10 and the spring plate 30 and electrically connected to the piezoelectric element 10 and the circuit board 200, or the flexible circuit board 20 may be disposed on one side of the spring plate 30 close to the supporting plate 500 and electrically connected to the piezoelectric element 10 and the circuit board 200 by using a through hole. It is understood that the piezoelectric element 10 may also be disposed on a side of the elastic sheet 30 adjacent to the supporting plate 500. The elastic sheet 30 may be a metal plate with good elasticity, such as a stainless steel plate, an aluminum alloy plate, etc., and the elastic sheet 30 may also be a plastic plate, such as an acrylic plate, an ABS (acrylonitrile butadiene styrene) plastic plate, etc., so that the elastic sheet 30 has a fast response speed and large vibration displacement, and certainly, the structure and material of the elastic sheet 30 are not limited thereto, and may also be in other forms capable of meeting the requirements.

As shown in fig. 4 and 9, the elastic piece 30 includes a main body portion 32, a first bending portion 31 and a second bending portion 33, the first bending portion 31 and the second bending portion 33 are disposed on the periphery of the main body portion 32, the first bending portion 31 is connected to the circuit board 200, the second bending portion 33 is connected to the other of the touch pad 300 and the support plate 500, specifically, one side of the main body portion 32 is connected to the circuit board 200 through the first bending portion 31, a space is formed between the main body portion 32 of the elastic piece 30 and the circuit board 200 to form a deformation space of the elastic piece 30, the other side of the main body portion 32 is connected to the support plate 500 through the second bending portion 33, and the second bending portion 33 and the main body portion 32 can be connected to the support plate 500 through a material containing rubber, plastic or the like having elasticity. One side of the main body 32 may be connected to the circuit board 200 through the first bending portion 31, the other side of the main body 32 may be connected to the touch pad 300 through the second bending portion 33, and a space may be formed between the main body 32 of the elastic piece 30 and the circuit board 200 to form a deformation space of the elastic piece 30. Through setting up first kink 31 and second kink 33, and the main part 32 of shell fragment 30 passes through first kink 31 and links to each other with circuit board 200 elasticity, and the main part 32 of shell fragment 30 passes through second kink 33 and links to each other with one elasticity in backup pad 500 and the touch-control board 300, strengthens piezoelectric unit 100's stability, avoids piezoelectric unit 100 to drop in the use, influences user experience.

Specifically, for example, the first bent portion 31 of the elastic sheet 30 is connected to the circuit board 200, the elastic sheet 30 may include three first bent portions 31 and three second bent portions 33, the main portion 32 of the elastic sheet 30 is formed in a circular shape, the three first bent portions 31 are uniformly distributed on the circumference of the main portion 32, the three second bent portions 33 are also uniformly distributed on the circumference of the main portion 32, and the first bent portions 31 and the second bent portions 33 are alternately disposed on the periphery of the main portion 32. The piezoelectric unit 100 is electrically connected to the circuit board 200 through the first bending portion 31. It can be understood that the main body portion 32 and the first bending portion 31 can be connected into a whole by welding, snap-fit connection, gluing, screwing, etc., the main body portion 32 and the second bending portion 33 can also be connected into a whole by welding, snap-fit connection, gluing, screwing, etc., and the main body portion 32, the first bending portion 31 and the second bending portion 33 can also be formed into a whole by bending a sheet metal part or by injection molding, etc.

Further, as shown in fig. 5 and 6, the first bending part 31 may be provided with a first connection hole 311, the flexible circuit board 20 may be provided with a second connection hole 312, and the first connection hole 311 and the second connection hole 312 are oppositely arranged. When the piezoelectric unit 100 is connected to the circuit board 200 through the surface mounting process, the first connection hole 311 and the second connection hole 312, which are oppositely disposed, may increase the amount of solder paste used for connection, and enhance the adhesion between the piezoelectric unit 100 and the circuit board 200.

Further, as shown in fig. 7, the piezoelectric unit 100 is further provided with a rivet 313, and the rivet 313 is inserted into the first connection hole 311 and the second connection hole 312. The riveting member 313 may include a riveting tube 3132, and a first flange 3131 and a second flange 3133 connected to opposite ends of the riveting tube 3132, wherein the first flange 3131 and the second flange are respectively disposed around an outer circumferential wall of the riveting tube 3132, the riveting tube 3132 is disposed in the first connection hole 311 and the second connection hole 312, the first flange is disposed on a surface of the elastic sheet 30 on a side away from the flexible circuit board 20, and the second flange 3133 is disposed on a surface of the flexible circuit board 20 on a side away from the elastic sheet 30. The rivet 313 can enhance the connection strength between the flexible circuit board 20 and the elastic sheet 30, and can also increase the fit clearance between the first bending part 31 and the circuit board 200, thereby increasing the thickness and the usage of solder paste for connection, and enhancing the adhesive strength between the first bending part 31 and the circuit board 200.

As shown in fig. 7 and 8, it is understood that rivet 3132 has a through-hole 314. Therefore, the adhesive strength between the circuit board 200 and the piezoelectric unit 100 can be further enhanced, and the stability of the touch feedback module 1000 can be improved.

Further, the piezoelectric element 10 is disposed on the main body portion 32, the piezoelectric element 10 is fixed on the flexible circuit board 20 through a surface mount process, the piezoelectric element 10 includes a first electrode, a piezoelectric structure and a second electrode, which are stacked, the piezoelectric structure may be made of an organic piezoelectric material, an inorganic ceramic piezoelectric material, and the like, the first electrode and the second electrode may be formed by depositing a conductive material on the piezoelectric structure, or the first electrode and the second electrode may be directly attached to the piezoelectric element 10. The piezoelectric element 10 is electrically connected to the wiring board 200 through the flexible circuit board 20.

It should be noted that, the process of pressure sensing and touch feedback of the touch feedback module 1000 is as follows, when an external force presses the touch panel 300, the piezoelectric unit 100 under the touch panel 300 is stressed, the elastic sheet 30 deforms to transmit the force to the piezoelectric element 10, the piezoelectric element 10 and the elastic sheet 30 deform together, and the piezoelectric element 10 generates an output voltage through a positive piezoelectric effect, and the output voltage is transmitted to the circuit board 200 through the flexible circuit board 20 to sense the pressure; at this time, the circuit board 200 may transmit an electrical signal to the piezoelectric element 10 through the flexible circuit board 20, and the piezoelectric element 10 generates a force effect through an inverse piezoelectric effect and deforms under the force effect to drive the elastic sheet 30 to deform, and the elastic sheet 30 drives the touch panel 300 to vibrate, thereby implementing touch feedback.

It can be understood that the touch feedback module 1000 may be provided with a plurality of piezoelectric units 100 to enhance the pressure sensing and touch feedback effects of the touch feedback module 1000. Be provided with a plurality of elastic blocks 400 between touch panel 300 and the backup pad 500 and connect, elastic block 400 can be for elastic material such as the foam that contains glue, rubber or plastics, avoids receiving when falling etc. impact force at touch-control feedback module 1000, backup pad 500 and touch-control board separation, influences the product property ability to, elastic material can take place deformation when touch panel 300 vibrates, further improves pressure sensing and touch-control feedback's effect.

The embodiment of the present invention further provides an electronic device, which includes the touch feedback module 1000, and the electronic device includes, but is not limited to, a computer, a mobile phone, a vehicle-mounted device, and the like.

Other configurations and operations of the piezoelectric unit 100, the touch feedback module 1000, and the electronic device according to the embodiment of the utility model are known to those skilled in the art, and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The piezoelectric unit is characterized in that the piezoelectric unit is used for a touch feedback module, the touch feedback module further comprises a first plate and a second plate which are opposite and arranged at intervals, the piezoelectric unit is connected between the first plate and the second plate, and the piezoelectric unit comprises:

the elastic sheet comprises a main body part, a first bent part and a second bent part, wherein the first bent part and the second bent part are arranged on two opposite sides of the main body part, the first side of the main body part is elastically connected with the first plate through the first bent part so that the first side of the main body part is spaced from the first plate and has a movable stroke along a first direction, and the second side of the main body part is elastically connected with the second plate through the second bent part so that the second side of the main body part is spaced from the second plate and has a movable stroke along the first direction; wherein the first direction is a direction perpendicular to the first board surface;

and a piezoelectric element disposed on the first side and/or the second side of the body portion and spaced apart from the first plate and the second plate.

2. The piezoelectric unit according to claim 1, wherein the main body portion, the first bent portion, and the second bent portion are an integral piece.

3. The piezoelectric unit according to claim 1, wherein one end of the first bending portion is connected to an outer peripheral edge of the main body portion, and the other end of the first bending portion is bent toward a direction close to a center of the main body portion, or wherein one end of the first bending portion is connected to an outer peripheral edge of the main body portion, and the other end of the first bending portion is bent away from the center of the main body portion;

one end of the second bending part is connected with the outer periphery of the main body part, and the other end of the second bending part is bent towards the direction close to the center of the main body part, or one end of the second bending part is connected with the outer periphery of the main body part, and the other end of the second bending part is bent towards the direction far away from the center of the main body part.

4. The piezoelectric unit according to claim 1, wherein the first bent portion is a plurality of the first bent portions arranged at intervals in a circumferential direction of the main body portion, and/or wherein the second bent portion is a plurality of the second bent portions arranged at intervals in a circumferential direction of the main body portion;

the first bent portion and the second bent portion are arranged at intervals in a circumferential direction of the main body portion.

5. The piezoelectric unit according to claim 4, further comprising:

the first buffer piece is connected between the main body part and the second plate, and the second bent part surrounds the first buffer piece.

6. The piezoelectric unit according to any one of claims 1 to 5, further comprising:

the flexible circuit board is connected with the main body part and the first bending part in a stacked mode, the piezoelectric element is electrically connected with the flexible circuit board, a first connecting hole is formed in the first bending part, a second connecting hole is formed in the flexible circuit board, and the first connecting hole and the second connecting hole are arranged oppositely.

7. The piezoelectric unit according to claim 6, further comprising:

the riveting piece penetrates through the first connecting hole and the second connecting hole to connect the first bending part and the flexible circuit board.

8. The piezoelectric unit according to claim 7, wherein the rivet is provided with a through hole that penetrates through the rivet in a direction in which the first bent portion and the flexible circuit board are arranged in a stacked manner.

9. A touch feedback module, comprising: a first plate, a second plate and a piezoelectric unit according to any of claims 1-8, the piezoelectric unit being connected between the first plate and the second plate, wherein the first plate is a circuit board and the second plate is a support plate, or the first plate is the circuit board and the second plate is a touch pad.

10. An electronic device, comprising: the touch feedback module of claim 9.

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