CN216286569U - 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 comprises a first plate and a second plate which are oppositely arranged at an interval, the piezoelectric unit is positioned between the first plate and the second plate, and the piezoelectric unit comprises: the elastic sheet comprises a main body part and a bending part which is bent and connected from the main body part to the first plate, a first connecting hole is formed in the bending part, a connecting layer is filled in the first connecting hole, the connecting layer fixes the bending part and the first plate, and the main body part is connected with the second plate; and a piezoelectric element provided on the main body. According to the piezoelectric unit, the bending part is arranged on the elastic sheet, the first connecting hole is arranged on the bending part, and the connecting layer is filled in the first connecting hole, so that the stability of the touch 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 stability of a touch feedback module.

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.

The piezoelectric unit according to an embodiment of the present invention is used for a touch feedback module, the touch feedback module includes a first plate and a second plate that are disposed opposite to each other and at an interval, the piezoelectric unit is located between the first plate and the second plate, and the piezoelectric unit includes: the elastic sheet comprises a main body part and a bending part which is bent and connected from the main body part to the first plate, a first connecting hole is formed in the bending part, a connecting layer is filled in the first connecting hole and used for fixing the bending part and the first plate, the main body part is connected with the second plate, and the main body part, the first plate and the second plate are spaced to enable the main body part to have a movable stroke along a first direction, wherein the first direction is a direction perpendicular to the surface of the first plate; a piezoelectric element disposed on 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 bending part is arranged on the elastic sheet, the first connecting hole is arranged on the bending part, and the connecting layer is filled in the first connecting hole, so that the using amount of the connecting layer for connecting the bending part and the first plate can be increased, and meanwhile, the contact area between the connecting layer and the bending part can be increased, so that the connection strength between the bending part and the first plate is increased, the piezoelectric unit is prevented from falling off from the touch feedback module, and the stability of the touch feedback module is improved.

In some embodiments, the main body portion and the bent portion are an integral 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 bending part is connected to the outer periphery of the main body part, and the other end of the bending part is bent toward a direction close to the center of the main body part; or one end of the bending part is connected with the outer periphery of the main body part, and the other end of the bending part is bent towards the direction far away from the center of the main body part. It can be understood that the area that the main part is connected with the first board through the kink is bigger, further strengthens the joint strength between shell fragment and the first board to, the other end orientation of kink can also reduce the volume that the shell fragment occupied in piezoelectric unit towards the central direction bending of being close to the main part, is favorable to piezoelectric unit's miniaturization.

In some embodiments, the bent portion is a plurality of bent portions, and the plurality of bent portions are arranged at intervals in the circumferential direction of the main body portion. It can be understood that the connection strength between the elastic sheet and the first plate can be further enhanced by arranging a plurality of bending parts, the piezoelectric unit can be prevented from falling off from the touch control feedback module when the deformation of the elastic sheet is large, and meanwhile, the bending parts arranged at intervals in the circumferential direction of the main body part are arranged, so that the stability of the elastic sheet can be improved, and the piezoelectric unit is prevented from falling off due to the fact that the elastic sheet is stressed unevenly when the piezoelectric unit is pressed by external force.

In some embodiments, the body portion is connected to the second plate by a buffer. It can be understood that, on the one hand, can transmit the power that the main part of shell fragment received for the second board, perhaps, transmit the power that the second board received for the main part, on the other hand utilizes the bolster to connect can cushion the power that shell fragment or second board received, avoids leading to the piezo-electric unit fracture because of falling etc. sudden big deformation, further improves the stability of touch-control feedback module.

In some embodiments, the piezoelectric unit further comprises: the flexible circuit board and the elastic sheet are arranged in a stacked mode, the piezoelectric element is electrically connected with the flexible circuit board, a second connecting hole is formed in the flexible circuit board and is opposite to the first connecting hole, and the connecting layer penetrates through the first connecting hole and the second connecting hole and is used for connecting the elastic sheet and the first board. It can be understood that, when the piezoelectric unit is fixed on the first plate, the contact area between the connecting layer for connection and the elastic sheet can be effectively increased through the first connecting hole and the second connecting hole which are oppositely arranged, and the strength between the first plate and the elastic sheet is enhanced.

In some optional embodiments, the piezoelectric unit further comprises: the riveting piece penetrates through the first connecting hole and the second connecting hole and is used for riveting the flexible circuit board and the elastic sheet. It can be understood that the riveting pieces are arranged at the first connecting hole and the second connecting hole, so that the connecting 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 kink and the first board simultaneously, when fixed the piezoelectric unit to the first board, can increase the thickness and the quantity of the articulamentum that is used for connecting, the adhesive strength between reinforcing piezoelectric unit and the first board.

In some optional embodiments, the rivet is provided with a through hole, and the connecting layer is filled in the through hole and used for connecting the elastic sheet and the first plate. It can be understood that when the piezoelectric unit is fixed to the first plate, the contact area between the connecting layer for connection and the riveting piece can be effectively increased through the through hole formed in the riveting piece, meanwhile, the distance between the bending part and the first plate can be increased through the riveting piece, the thickness and the using amount of the connecting layer for connection are increased, and the connection strength between the connecting layer and the elastic sheet is further enhanced.

The touch feedback module according to the embodiment of the utility model comprises: the piezoelectric unit is fixed between the first plate and the second plate, wherein the first plate is one of the touch pad and the support plate, and the second plate is the other of the touch pad and the support plate.

According to the touch feedback module provided by the embodiment of the utility model, the piezoelectric unit is arranged, so that the connection strength between the piezoelectric unit and the first plate can be enhanced, the piezoelectric unit is prevented from falling off from the touch feedback module, and the stability of the touch feedback module is improved.

The electronic device according to the embodiment of the utility model comprises the touch feedback module.

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 a schematic diagram of a touch feedback module according to an embodiment of the utility model;

FIG. 2 is an exploded view of a touch feedback module according to an embodiment of the utility model;

FIG. 3 is an exploded schematic view of a piezoelectric unit 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 piezoelectric unit according to one embodiment of the present invention;

FIG. 6 is a schematic diagram of a piezoelectric unit according to another embodiment of the present invention;

fig. 7 is a schematic view of a rivet according to one embodiment of the utility model.

Reference numerals:

a piezoelectric unit 100; a piezoelectric element 10; a flexible circuit board 20; the second connection hole 21; a spring plate 30; a bent portion 31; a first connection hole 32; an extension 33; a main body portion 34; a connecting layer 40; a buffer member 50; a rivet 60; a through hole 61; a first flange 62; riveting the tube 63; a second flange 64;

a touch feedback module 1000; a wiring board 200; a touch panel 300; 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 7, a piezoelectric unit 100 according to an embodiment of the utility model is described, where the piezoelectric unit 100 is used in a touch feedback module 1000, and the touch feedback module 1000 includes a first plate and a second plate that are disposed opposite to each other and spaced apart from each other, and the piezoelectric unit 100 is located 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 3, the piezoelectric unit 100 includes a spring sheet 30 and a piezoelectric element 10, wherein the spring sheet 30 may be a metal plate with good elasticity, such as a stainless steel plate or an aluminum alloy plate, and the spring sheet 30 may also be a plastic plate, such as an acrylic plate or an ABS (acrylonitrile butadiene styrene) plastic plate, so as to enable the spring sheet 30 to respond quickly, and of course, the structure and material of the spring sheet 30 are not limited thereto, and may also be in other forms that can meet the requirements.

Referring to fig. 4, the elastic sheet 30 includes a main body portion 34 and a bending portion 31, the main body portion 34 is connected to the first board through the bending portion 31, and the main body portion 34 is spaced from the first board, so that the main body portion 34 has a moving stroke along the first direction (refer to the z direction in fig. 2), and a space for deformation of the main body portion 34 of the elastic sheet 30 can be provided, so as to implement the function of touch feedback or touch detection of the piezoelectric unit 100. The first connection hole 32 is formed in the bending portion 31, the connection layer 40 is filled in the first connection hole 32, and the connection layer 40 fixes the bending portion 31 and the first plate. It should be understood that the connection layer 40 may be solder, and the connection between the bent portion 31 of the elastic sheet 30 and the first board is realized by using solder, but the utility model is not limited thereto, and the connection layer 40 may also be other materials that can connect the bent portion 31 and the first board, for example, glue, etc. The first connection hole 32 may be partially filled with the connection layer 40, may be completely filled with the connection layer 40, and may further be filled with the connection layer 40, and a protrusion is formed on a side of the bending portion 31 away from the first board.

Further, the main body portion 34 is connected to the second board, and the main body portion 34 is spaced from the second board, so that the main body portion 34 has a moving stroke along the first direction (refer to the z direction in fig. 2), so as to provide a space for the main body portion 34 of the elastic sheet 30 to deform, wherein the first board may be one of the touch pad 300 and the support board 500 of the touch feedback module 1000, the second board may be the other of the touch pad 300 and the support board 500 of the touch feedback module 1000, the touch feedback module 1000 may further include the circuit board 200, the circuit board 200 may be disposed between the touch pad 300 and the piezoelectric unit 100, the circuit board 200 may also be disposed between the support board 500 and the piezoelectric unit 100, when specifically disposed, the main body portion 34 of the elastic sheet 30 may be connected to the circuit board 200 of the touch feedback module 1000 through the bending portion 31, the main body portion 34 is fixedly connected to the touch pad 300, and the piezoelectric unit 100 is disposed between the touch pad 300 and the circuit board 200, the supporting plate 500 is arranged on one side of the circuit board 200 far away from the touch panel 300, and the circuit board 200 is fixed on the supporting plate 500; the main body 34 of the elastic sheet 30 may be connected to the circuit board 200 of the touch feedback module 1000 through the bending portion 31, the main body 34 is fixedly connected to the supporting plate 500, the piezoelectric unit 100 is disposed between the circuit board 200 and the supporting plate 500, the touch pad 300 is disposed on a side of the circuit board 200 away from the supporting plate 500, and the touch pad 300 is connected to the circuit board 200.

Further, the piezoelectric element 10 is provided on the main body portion 34, and is provided at a distance from the first plate and the second plate. It will be appreciated that the first and second plates are spaced from the piezoelectric element 10, thereby providing space for deformation of the piezoelectric element 10; the piezoelectric elements 10 may be provided on the side of the main body portion 34 facing the first plate, the piezoelectric elements 10 may be provided on the side of the main body portion 34 facing the second plate, or two piezoelectric elements 10 may be provided, one piezoelectric element 10 being provided on the side of the main body portion 34 facing the first plate, and the other piezoelectric element 10 being provided on the side of the main body portion 34 facing the second plate. The piezoelectric element 10 is electrically connected to the circuit board 200 of the touch feedback module 1000.

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, wherein the bending portion 31 is disposed on the elastic sheet 30, the first connection hole 32 is disposed on the bending portion 31, and the connection layer 40 is filled in the first connection hole 32, so that the usage amount of the connection layer 40 for connecting the bending portion 31 and the first board can be increased, and the contact area between the connection layer 40 and the bending portion 31 can be increased, thereby increasing the connection strength between the bending portion 31 and the first board, preventing the piezoelectric unit 100 from falling off from the touch feedback module 1000, and improving the stability of the touch feedback module 1000.

As shown in fig. 3 and 4, in some embodiments, the main body portion 34 and the bent portion 31 are a single piece. It can be understood that the main body portion 34 and the bent portion 31 can be integrally formed by bending a sheet metal part or injection molding, and thus the elastic sheet 30 can be manufactured by an integral forming process, which simplifies the production, manufacturing and assembling processes of the piezoelectric unit 100, and of course, the embodiment of the present invention is not limited thereto, and the main body portion 34 and the bent portion 31 can also be split and connected by welding, snap connection, gluing, screwing, and the like to form the structure of the elastic sheet 30.

With continued reference to fig. 3 and 4, in some embodiments, one end of the bending portion 31 is connected to the outer periphery of the main body portion 34, and the other end of the bending portion 31 is bent toward the center of the main body portion 34; alternatively, one end of the bent portion 31 is connected to the outer periphery of the main body portion 34, and the other end of the bent portion 31 is bent in a direction away from the center of the main body portion 34. Therefore, the area of the main body portion 34 connected to the first plate through the bent portion 31 is larger, the connection strength between the elastic sheet 30 and the first plate is further enhanced, and the other end of the bent portion 31 is bent toward the center direction close to the main body portion 34, so that the volume occupied by the elastic sheet 30 in the piezoelectric unit 100 can be reduced, and the miniaturization of the piezoelectric unit 100 is facilitated.

It can be understood that the other end of the bent portion 31 is bent toward the center direction close to the main body portion 34, the other end of the bent portion 31 faces toward the center direction close to the main body portion 34, and the bent portion 31 forms an angle with the main body portion 34, or the other end of the bent portion 31 faces toward the center direction close to the main body portion 34 and forms an extending portion 33 parallel to the main body portion 34; alternatively, the other end of the bent portion 31 is bent in a direction away from the center of the main body portion 34, the other end of the bent portion 31 may be bent in a direction away from the center of the main body portion 34, the bent portion 31 forms an angle with the main body portion 34, or the other end of the bent portion 31 is bent in a direction away from the center of the main body portion 34 and forms an extending portion 33 parallel to the main body portion 34. The first connection hole 32 may be disposed on the extension 33.

With continued reference to fig. 3 and 4, in some embodiments, the bent portion 31 is multiple, and the multiple bent portions 31 are spaced apart from each other in the circumferential direction of the main body portion 34. It can be understood that, a plurality of kink 31 can be equidistant evenly arranged in the circumferential direction of main part 34, for example, kink 31 is provided with threely, three kink 31 evenly arranges in the circumferential direction of main part 34, therefore, set up a plurality of kink 31 and can further strengthen the joint strength between shell fragment 30 and the first board, when avoiding shell fragment 30 deformation great, piezoelectric unit 100 drops from touch-control feedback module 1000, and simultaneously, set up a plurality of kink 31 of arranging at main part 34 circumference interval, can increase the stability of shell fragment 30, when avoiding pressing piezoelectric unit 100 at the external force, shell fragment 30 atress uneven leads to piezoelectric unit 100 to become invalid and drops. Of course, the embodiment of the present invention is not limited thereto, and the plurality of bent portions may not be uniformly arranged in the circumferential direction of the main body portion 34.

Referring to fig. 1 to 4, in some embodiments, the main body portion 34 is connected to the second board through the buffer 50, it is understood that the buffer 50 may be an elastic material such as foam, rubber or plastic containing rubber, and the main body portion 34 may be connected and fixed to the second board through the buffer 50, on one hand, a force applied to the main body portion 34 of the elastic sheet 30 may be transmitted to the second board, or a force applied to the second board may be transmitted to the main body portion 34, and on the other hand, the elastic material is used for connection to buffer the force applied to the elastic sheet 30 or the second board, so as to avoid a sudden large deformation such as falling to cause a fracture of the piezoelectric unit 100, and further improve the stability of the touch feedback module 1000.

Referring to fig. 5, in some embodiments, the piezoelectric unit 100 further includes: the flexible circuit board 20, the flexible circuit board 20 is stacked with the elastic sheet 30, the piezoelectric element 10 is electrically connected with the flexible circuit board 20, it can be understood that the flexible circuit board 20 can be arranged on one side of the elastic sheet 30 close to the circuit board 200, and also can be arranged on one side of the elastic sheet 30 far away from the circuit board 200, the piezoelectric element 10 can be arranged on one side of the flexible circuit board 20 far away from the elastic sheet 30, and is directly electrically connected with the flexible circuit board 20, the piezoelectric element 10 can also be arranged on one side of the elastic sheet 30 far away from the flexible circuit board 20, through holes penetrating through the elastic sheet are manufactured on the elastic sheet 30, and conductive materials are filled in the through holes, so that the electrical connection between the piezoelectric element 10 and the flexible circuit board 20 is realized. 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.

Further, a second connection hole 21 is formed in the flexible circuit board 20, the second connection hole 21 is disposed opposite to the first connection hole 32, and the connection layer 40 passes through the first connection hole 32 and the second connection hole 21 to connect the elastic sheet 30 and the first board. Therefore, when the piezoelectric unit 100 is fixed on the first plate, the contact area between the connection layer 40 for connection and the elastic sheet 30 can be effectively increased through the first connection hole 32 and the second connection hole 21 which are oppositely arranged, and the strength between the first plate and the elastic sheet 30 is enhanced. It is understood that the first connection hole 32 may be disposed in the middle of the bending portion 31, the second connection hole 21 is disposed corresponding to the first connection hole 32, so as to facilitate the arrangement of the circuit on the flexible circuit board 20, the first connection hole 32 and the second connection hole 21 may be disposed in multiple numbers, and the first connection hole 32 and the second connection hole 21 may have a circular, elliptical, quadrilateral, or other polygonal structure, as long as it is ensured that the first connection hole 32 and the second connection hole 21 are disposed opposite to each other, which is not particularly limited in the embodiment of the present invention.

Referring to fig. 6, in some alternative embodiments, the piezoelectric unit 100 further includes a rivet 60, and the rivet 60 is disposed through the first connection hole 32 and the second connection hole 21 for riveting the flexible circuit board 20 and the elastic sheet 30. It can be understood that, by providing the riveting member 60 at the first connection hole 32 and the second connection hole 21, the connection strength between the flexible circuit board 20 and the elastic sheet 30 can be enhanced, and the flexible circuit board 20 is prevented from falling off the elastic sheet 30; meanwhile, the rivet 60 may increase the distance between the bent portion 31 and the first plate, and may increase the thickness and amount of the connection layer 40 for connection when the piezoelectric unit 100 is fixed to the first plate, thereby enhancing the connection strength between the piezoelectric unit 100 and the first plate.

Referring to fig. 7, in the present embodiment, the rivet 60 may include a rivet tube 63, and a first flange 62 and a second flange 64 connected to opposite ends of the rivet tube 63, wherein the first flange 62 and the second flange 64 are respectively disposed around an outer peripheral wall of the rivet tube 63, the rivet tube 63 is disposed in the first connecting hole 32 and the second connecting hole 21, the first flange 62 is disposed on a surface of the elastic sheet 30 on a side away from the flexible circuit board 20, and the second flange 64 is disposed on a surface of the flexible circuit board 20 on a side 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 matching of the first flanging 62 and the elastic sheet 30 and the abutting matching of the second flanging 64 and the flexible circuit board 20. It is understood that the first connection hole 32 and the second connection hole 21 are circular and the rivet tube 63 is formed in a circular tube shape, but the present invention is not limited thereto, and the rivet tube 63 may be formed in other shapes such as a quadrangular prism, a pentagonal prism, etc. as long as the rivet 60, the first connection hole 32, and the second connection hole 21 cooperate to achieve riveting.

It should be noted that the riveting tube 63 may completely fill the first connection hole 32 and the second connection hole 21, or a gap may be formed between the outer peripheral wall of the riveting tube 63 and the first connection hole 32 and the second connection hole 21, and the connection layer 40 is disposed in the gap, so that the usage amount of the connection layer 40 for connecting the elastic sheet 30 and the first board may be increased, the contact area between the connection layer 40 and the elastic sheet 30 is increased, the connection strength between the piezoelectric unit 100 and the first board is further increased, the piezoelectric unit 100 is prevented from falling off from the touch feedback module 1000, and the stability of the touch feedback module 1000 is improved.

Referring to fig. 7, in some alternative embodiments, the rivet 60 has a through hole 61, and the connecting layer 40 is filled in the through hole 61 for connecting the elastic sheet 30 and the first board. Therefore, when the piezoelectric unit 100 is fixed to the first plate, the contact area between the connection layer 40 for connection and the piezoelectric unit 100 can be effectively increased through the through hole 61 formed in the riveting member 60, and meanwhile, the riveting member 60 can increase the distance between the bending portion 31 and the first plate, increase the thickness and the using amount of the connection layer 40 for connection, and further enhance the connection strength between the connection layer 40 and the elastic sheet 30.

Referring to fig. 1-2, a touch feedback module 1000 according to an embodiment of the utility model includes: the touch feedback module 1000 may further include a circuit board 200, wherein the circuit board 200 may be disposed between the touch panel 300 and the piezoelectric unit 100, and the circuit board 200 may also be disposed between the support plate 500 and the piezoelectric unit 100. It can be understood that a plurality of piezoelectric units 100 may be provided, and a plurality of piezoelectric units 100 are arranged between the first board and the second board 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 connection strength between the piezoelectric units 100 and the first board may be enhanced, the piezoelectric units 100 are prevented from falling off from the touch feedback module 1000, and the stability of the touch feedback module 1000 is increased.

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 6. 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. 1-2, 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. 1-2, 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 or 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, 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 or other structural forms capable of implementing an electrical control function.

Referring to fig. 3, 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 a 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 the piezoelectric element 10 is electrically connected to the circuit board 200 through the flexible circuit board 20, or the flexible circuit board 20 may be disposed on a 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 through 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.

Referring to fig. 4, further, the elastic sheet 30 includes a main body portion 34 and a bending portion 31, the bending portion 31 is disposed at the periphery of the main body portion 34, one side of the main body portion 34 is connected to one of the touch pad 300 and the support plate 500 through the bending portion 31, the other side of the main body portion 34 is connected to the other of the touch pad 300 and the support plate 500 through the buffer 50, the touch feedback module 1000 may further include a circuit board 200, the circuit board 200 may be disposed between the touch pad 300 and the piezoelectric unit 100, the circuit board 200 may also be disposed between the support plate 500 and the piezoelectric unit 100, specifically, one side of the main body portion 34 may be connected to the circuit board 200 through the bending portion 31, the bending portion 31 is provided with a connecting hole, the connecting hole is filled with the connecting layer 40, the bending portion 31 is connected to the circuit board 200 through the connecting layer 40, and a space is provided between the main body portion 34 of the elastic sheet 30 and the circuit board 200 to form a deformation space of the elastic sheet 30, the other side of the main body 34 is connected to the supporting plate 500 through a buffer 50, the buffer 50 may be made of elastic material such as foam containing rubber, rubber or plastic, the touch pad 300 is disposed on the side of the circuit board 200 away from the supporting plate 500, and the touch pad 300 is connected to the circuit board 200. One side of the main body portion 34 may be connected to the circuit board 200 through the bending portion 31, the other side of the main body portion 34 is connected to the touch pad 300 through the buffer 50, a space is formed between the main body portion 34 of the elastic piece 30 and the circuit board 200 to form a deformation space of the elastic piece 30, the supporting plate 500 is disposed on one side of the circuit board 200 away from the touch pad 300, and the circuit board 200 is fixed to the supporting plate 500.

Specifically, for example, the circuit board 200 is disposed between the touch pad 300 and the piezoelectric unit 100, the bending portion 31 of the resilient sheet 30 is connected to the circuit board 200, the main portion 34 of the resilient sheet 30 is connected to the support plate 500, the resilient sheet 30 may include three bending portions 31, the main portion 34 of the resilient sheet 30 is formed in a circular shape, and the three bending portions 31 are uniformly spaced on the circumference of the main portion 34. It can be understood that the main body portion 34 and the bent portion 31 can be connected into a whole by welding, snap connection, gluing, screwing, or the main body portion 34 and the bent portion 31 can be formed into a whole by bending a sheet metal part or injection molding.

Referring to fig. 5, the bending portion 31 may be provided with a first connection hole 32, the flexible circuit board 20 is provided with a second connection hole 21, and the first connection hole 32 and the second connection hole 21 are disposed opposite to each other. The piezoelectric unit 100 can be connected with the circuit board 200 through a surface mounting process, and the first connecting hole 32 and the second connecting hole 21 which are arranged oppositely can increase the using amount of solder paste for connection, enhance the connection strength between the piezoelectric unit 100 and the circuit board 200, and reduce the influence caused by warping of the circuit board 200 and the elastic sheet 30.

Referring to fig. 6 and 7, the piezoelectric unit 100 is further provided with a rivet 60, and the rivet 60 is inserted into the first connection hole 32 and the second connection hole 21. The riveting member 60 may include a riveting tube 63, and a first flange 62 and a second flange 64 connected to opposite ends of the riveting tube 63, wherein the first flange 62 and the second flange are respectively disposed around an outer peripheral wall of the riveting tube 63, the riveting tube 63 is disposed in the first connecting hole 32 and the second connecting hole 21, the first flange 62 is disposed on a surface of the flexible circuit board 30 far away from the flexible circuit board 20, and the second flange 64 is disposed on a surface of the flexible circuit board 20 far away from the flexible circuit board 30. The rivet 60 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 bending portion 31 and the circuit board 200, thereby increasing the thickness and the usage amount of solder paste for connection, and enhancing the connection strength between the bending portion 31 and the circuit board 200.

It will be appreciated that the rivet tube 63 has a through hole 61. The through hole 61 penetrates the rivet 60 in the direction in which the bent portion 31 and the flexible circuit board 20 are arranged in a stacked manner. Therefore, when the piezoelectric unit 100 is fixed to the first plate, the through hole 61 formed in the rivet 60 can effectively increase the contact area between the connection layer 40 and the piezoelectric unit 100, further enhance the connection strength between the first plate and the piezoelectric unit 100, and simultaneously, the rivet 60 can increase the distance between the bending portion 31 and the first plate, thereby increasing the thickness and the usage amount of the connection layer 40.

Further, the piezoelectric element 10 is disposed on the main body portion 34, 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.

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 used for a touch feedback module, the touch feedback module includes a first plate and a second plate which are opposite and spaced, the piezoelectric unit is located between the first plate and the second plate, and the piezoelectric unit includes:

the elastic sheet comprises a main body part and a bending part which is bent and connected from the main body part to the first plate, a first connecting hole is formed in the bending part, a connecting layer is filled in the first connecting hole and used for fixing the bending part and the first plate, the main body part is connected with the second plate, and the main body part, the first plate and the second plate are spaced to enable the main body part to have a movable stroke along a first direction, wherein the first direction is a direction perpendicular to the surface of the first plate;

a piezoelectric element disposed on 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 and the bending portion are an integral piece.

3. The piezoelectric unit according to claim 1, wherein one end of the bent portion is connected to an outer peripheral edge of the main body portion, and the other end of the bent portion is bent toward a direction near a center of the main body portion; or one end of the bending part is connected with the outer periphery of the main body part, and the other end of the 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 bent portion is plural, and the plural bent portions are arranged at intervals in a circumferential direction of the main body portion.

5. The piezoelectric unit according to claim 1, wherein the body portion is connected to the second plate through a buffer.

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

the flexible circuit board and the elastic sheet are arranged in a stacked mode, the piezoelectric element is electrically connected with the flexible circuit board, a second connecting hole is formed in the flexible circuit board and is opposite to the first connecting hole, and the connecting layer penetrates through the first connecting hole and the second connecting hole and is used for connecting the elastic sheet and the first board.

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

the riveting piece penetrates through the first connecting hole and the second connecting hole and is used for riveting the flexible circuit board and the elastic sheet.

8. The piezoelectric unit according to claim 7, wherein the rivet has a through hole, and the connecting layer is filled in the through hole and used for connecting the spring plate and the first plate.

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 fixed between the first plate and the second plate, wherein the first plate is one of a touch pad and a support plate and the second plate is the other of the touch pad and the support plate.

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

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