WO2022006844A1

WO2022006844A1 - Tactile feedback unit, tactile feedback device and electronic apparatus

Info

Publication number: WO2022006844A1
Application number: PCT/CN2020/101308
Authority: WO
Inventors: 许春东; 沈万程; 张艳良
Original assignee: 欧菲光集团股份有限公司; 欧菲微电子技术有限公司
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2022-01-13

Abstract

Disclosed are a tactile feedback unit, a tactile feedback device and an electronic apparatus. The tactile feedback unit comprises a piezoelectric member, a first elastic piece and a second elastic piece, wherein the vertical distance from a first surface to a second surface of the piezoelectric member is a first distance, and the vertical distance from a first side face to a second side face of the piezoelectric member is a second distance, with the first distance being smaller than the second distance; the first elastic piece is connected to the first side face, the second elastic piece is connected to the second side face, a side of the first elastic piece that faces away from the first side face is used for being connected to a fixed member, and a side of the second elastic piece that faces away from the second side face is used for being connected to a movable member; and the piezoelectric member deforms after receiving a driving voltage signal, and drives the first elastic piece and the second elastic piece to elastically deform, such that the movable member displaces relative to the fixed member. The first elastic piece and the second elastic piece are configured to serve as media, the deformation of the piezoelectric member is conducted to the movable member, and a slight deformation of the piezoelectric member can be amplified, such that the tactile feedback effect is good.

Description

Haptic feedback unit, haptic feedback device and electronic device

technical field

The present application belongs to the technical field of haptic feedback, and in particular, relates to a haptic feedback unit, a haptic feedback device and an electronic device.

Background technique

Piezoelectric materials have piezoelectric effect and inverse piezoelectric effect, and are used in many technical fields. Some manufacturers have studied the use of piezoelectric materials to achieve touch feedback. The principle is to use the inverse piezoelectric effect of piezoelectric materials to apply a voltage to the piezoelectric material, and the piezoelectric material will deform. feedback. However, in the current technical solution, the tactile feedback effect is not good when the piezoelectric material is applied.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a haptic feedback unit, a haptic feedback device and an electronic device, which can have a good haptic feedback effect.

To achieve the purpose of the application, the application provides the following technical solutions:

In a first aspect, the present application provides a haptic feedback unit, comprising a piezoelectric element, a first elastic sheet and a second elastic sheet, the piezoelectric element includes a first surface and a second surface that are parallel to and opposite to each other, and The opposite first side and second side, the vertical distance from the first surface to the second surface is the first distance, and the vertical distance from the first side to the second side is the second distance, so The first distance is smaller than the second distance, the first elastic piece is connected to the first side, the second elastic piece is connected to the second side, and the first elastic piece faces away from the first side One side of the second elastic piece is used to connect to the fixed piece, and the side of the second elastic piece facing away from the second side is used to connect to the movable piece; the piezoelectric piece is deformed after receiving the driving voltage signal, and drives the first elastic piece. An elastic piece and the second elastic piece are elastically deformed, so that the movable piece is displaced relative to the fixed piece.

By setting the first elastic sheet and the second elastic sheet as a medium, the deformation of the piezoelectric element is transmitted to the movable element, so that the tiny deformation of the piezoelectric element can be amplified, so that the tactile feedback effect is good. The first elastic piece is arranged on the first side, the second elastic piece is arranged on the second side, and the first distance from the first surface to the second surface is smaller than the second distance from the first side to the second side, the thickness of the piezoelectric element can be adjusted. Making it thinner and saving costs, the overall thickness of the haptic feedback unit can be reduced, and the thinning of the electronic device using the haptic feedback unit of this embodiment is facilitated. In addition, the larger first surface or the second surface is also convenient to set the electrode connection position, which is convenient to connect with the electrode inputting the driving voltage signal, and the connection reliability is high.

In one embodiment, the piezoelectric element extends along a first direction and has a first axis of symmetry in the first direction, and the connection between the midpoint of the first side surface and the midpoint of the second side surface is The line is the second axis of symmetry, and the first and second elastic pieces are symmetrical with respect to the first and second symmetry axes. By setting the first elastic piece and the second elastic piece to be symmetrical with respect to the first symmetry axis and the second symmetry axis, the structures of the first elastic piece and the second elastic piece are simplified and interchangeable, which is convenient for manufacture, and the piezoelectric element is deformed. When the first shrapnel and the second shrapnel are driven to deform, the deformability and deformation effect of the first shrapnel and the second shrapnel are symmetrical, and a uniform and consistent pulling force or thrust can be output to drive the movable parts to move relatively regularly.

In one embodiment, the first elastic piece includes a first connecting portion, a first extending portion, a second connecting portion, a second extending portion and a third connecting portion which are connected in sequence, and the first connecting portion and the first connecting portion Three connecting parts are respectively connected to two ends of the first side surface along the first direction, the second connecting part and the first side surface have a distance, and the second axis of symmetry passes through the second the center of the connecting part, the second connecting part is used for connecting with the fixing part, the piezoelectric part is stretched and deformed along the first direction, and the piezoelectric part drives the first extension part and the The second extension portion is elastically deformed. By setting the structure of three connecting parts (ie the first connecting part, the second connecting part and the third connecting part) and the two extending parts (ie the first extending part and the second extending part) of the first elastic sheet, the structure is simple, It can be stably connected with the piezoelectric element and the fixing element, and at the same time has good elastic deformation ability, so that the haptic feedback unit can have a strong driving ability.

In one embodiment, the tactile feedback unit further includes a flexible circuit board, the flexible circuit board includes a positive electrode connecting portion and a negative electrode connecting portion, the piezoelectric element includes a positive electrode connecting portion and a negative electrode connecting portion, the positive electrode connecting portion The connection part is connected to the positive electrode connection part, the negative electrode connection part is connected to the negative electrode connection part, the positive electrode connection part and the negative electrode connection part are both arranged on the first surface, and the positive electrode connection part is connected to the negative electrode connection part. An insulating portion is provided between the electrode connecting portion and the negative electrode connecting portion. . By setting the positive electrode connecting part of the flexible circuit board to be connected to the positive electrode connecting part, and the negative electrode connecting part to the negative electrode connecting part, the structure is simple and stable, and it is not easy to be damaged; the positive electrode connecting part and the negative electrode connecting part are arranged on the same surface, which can be convenient The ground is connected to the positive connection part and the negative connection part of the flexible circuit board; the area of the first surface is larger than that of other surfaces such as the first side, so that the positive electrode connection part and the negative electrode connection part are made larger, and the flexible The circuit board can have a larger connection area and enhance the structural stability.

In one embodiment, the positive electrode connecting portion and the negative electrode connecting portion are located at the same end of the first surface along the extending direction of the piezoelectric element.

In one embodiment, the tactile feedback unit further includes a protective layer, the protective layer is disposed on the first surface, and the protective layer extends to the first side surface and the second side surface to cover all the surfaces. The connection position of the piezoelectric element with the first elastic piece and the second elastic piece. The protective layer is provided to cover the connection positions of the piezoelectric element and the first elastic sheet and the second elastic sheet, so as to protect the adhesive bonding structure between the first elastic sheet and the second elastic sheet and the piezoelectric element.

In a second aspect, the present application provides a haptic feedback device comprising a fixed piece, a movable piece, and the haptic feedback unit according to any one of the various embodiments of the first aspect, the haptic feedback unit is connected between the fixed piece and the haptic feedback unit. between the moving parts.

In one embodiment, the fixing member is in the shape of a ring frame and encloses the first accommodating space, the number of the haptic feedback units is two, and the two haptic feedback units and the movable member are both accommodated in the In the first accommodating space, two opposite sides of the movable member are respectively provided with one of the tactile feedback units. By arranging the annular frame-shaped structure of the fixing piece and forming the first accommodating space to accommodate other components, the overall structure of the haptic feedback device is compact, for example, it saves space and is convenient for manufacture and assembly.

In one embodiment, the movable member is in the shape of a ring frame and encloses the second accommodating space, the number of the tactile feedback units is two, and the two tactile feedback units and the fixing member are both accommodated in the In the second accommodating space, two tactile feedback units are respectively provided on opposite sides of the fixing member. The fixed part is in the shape of a ring frame, and the movable part is accommodated in the first accommodating space, that is, the movable part is in the shape of a ring frame, and the fixed part is accommodated in the second accommodating space, which can also realize the elastic deformation of the haptic feedback unit. The purpose of moving the movable part relative to the fixed part.

In a third aspect, the present application provides an electronic device, including the haptic feedback device according to any one of the various embodiments of the second aspect.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1a is a schematic structural diagram of a haptic feedback unit according to an embodiment;

Fig. 1b is a side view structural schematic diagram of the haptic feedback unit of Fig. 1a;

Fig. 1c is a schematic diagram of the movement of the haptic feedback device of an embodiment;

2a is a schematic structural diagram of a haptic feedback unit according to an embodiment;

2b is a schematic structural diagram of a haptic feedback unit according to an embodiment;

2c is a schematic structural diagram of a haptic feedback unit according to an embodiment;

3a is a schematic structural diagram of a haptic feedback unit according to an embodiment;

Figure 3b is a schematic structural diagram in a process step at Q in Figure 3a;

Figure 3c is a schematic structural diagram in a process step at Q in Figure 3a;

Figure 3d is a schematic structural diagram in a process step at Q in Figure 3a;

Figure 3e is a schematic diagram of a partially enlarged structure at Q in Figure 3a;

Figure 3f is a schematic structural diagram of a flexible circuit board in a process step at Q in Figure 3a;

Figure 3g is a schematic cross-sectional structure diagram along M in Figure 3f;

Fig. 3h is a schematic view of the cross-sectional structure along N in Fig. 3f;

Fig. 3i is the structural representation in a process step at Q place in Fig. 3a;

Fig. 3j is the structural representation in a process step at Q place in Fig. 3a;

Figure 3k is a schematic view of a partially enlarged structure at Q in Figure 3a;

Fig. 31 is the structural representation of the flexible circuit board in a process step at Q place in Fig. 3a;

Figure 3m is a schematic view of the cross-sectional structure along E in Figure 3k;

FIG. 3n is a schematic diagram of the cross-sectional structure along F in FIG. 3k;

4a is a schematic structural diagram of a haptic feedback unit according to an embodiment;

Fig. 4b is a side view structural schematic diagram of a haptic feedback unit according to an embodiment;

5a is a schematic structural diagram of a haptic feedback device according to an embodiment;

5b is a schematic structural diagram of a haptic feedback device according to an embodiment;

Fig. 5c is a side view structural schematic diagram of a haptic feedback device according to an embodiment;

Fig. 5d is a side view structural schematic diagram of a haptic feedback device according to an embodiment;

5e is a schematic structural diagram of a haptic feedback device according to an embodiment;

5f is a schematic cross-sectional structural diagram of a haptic feedback device according to an embodiment;

5g is a schematic structural diagram of a haptic feedback device according to an embodiment;

Fig. 5h is a side view structural schematic diagram of a haptic feedback device according to an embodiment;

5i is a schematic structural diagram of a haptic feedback device according to an embodiment;

5j is a schematic structural diagram of a haptic feedback device according to an embodiment;

6a is a schematic structural diagram of a haptic feedback device according to an embodiment;

Fig. 6b is a side view structural schematic diagram of a haptic feedback device according to an embodiment;

6c is a schematic side view of the structure of a haptic feedback device according to an embodiment;

7a is a schematic diagram of a circuit connection structure of a haptic feedback device according to an embodiment;

7b is a schematic structural diagram of a circuit connection side view of a haptic feedback device according to an embodiment;

FIG. 7c is a schematic structural diagram of a circuit connection side view of a haptic feedback device according to an embodiment;

8a is a schematic structural diagram of a haptic feedback device according to an embodiment;

8b is a schematic structural diagram of a haptic feedback device according to an embodiment;

8c is a schematic structural diagram of a haptic feedback device according to an embodiment;

8d is a schematic structural diagram of a haptic feedback device according to an embodiment;

FIG. 8e is a schematic structural diagram of a haptic feedback device according to an embodiment.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Referring to FIGS. 1 a and 1 b , an embodiment of the present application provides a haptic feedback unit 100 , which includes a piezoelectric element 10 , a first elastic piece 21 and a second elastic piece 22 .

The piezoelectric element 10 includes a first surface 101 and a second surface 102 that are parallel and opposite to each other, and a first side surface 103 and a second side surface 104 that are parallel and opposite to each other. The first side 103 connects the first surface 101 and the second surface 102 , and the second side 104 also connects the first surface 101 and the second surface 102 . The vertical distance from the first surface 101 to the second surface 102 is the first distance H, and the first distance H is the thickness of the piezoelectric element 10; the vertical distance from the first side 103 to the second side 104 is the second distance W, the The two distances W are the width of the piezoelectric element 10 , and the first distance H is smaller than the second distance W, that is, the thickness of the piezoelectric element 10 is smaller than the width.

The first elastic piece 21 is connected to the first side 103 , and the second elastic piece 22 is connected to the second side 104 . 1a, 1b and 5e, the side of the first elastic piece 21 facing away from the first side surface 103 is used for connecting to the fixing member 200, and the side of the second elastic piece 22 facing away from the second side surface 104 is used for connecting to the fixing member 200. Connected to the movable part 300 .

1a and 1c, the piezoelectric element 10 is deformed upon receiving the driving voltage signal, and drives the first elastic piece 21 and the second elastic piece 22 to elastically deform, so that the movable element 300 is displaced relative to the fixed element 200.

In this embodiment, please refer to FIG. 1c , take two haptic feedback units with the same structure, namely the first haptic feedback unit 110 and the second haptic feedback unit 120 as examples, the first haptic feedback unit 110 and the second haptic feedback unit 120 120 are respectively disposed on opposite sides of the movable member 300 and are respectively connected with the fixing member 200 . When the first haptic feedback unit 110 and the second haptic feedback unit 120 do not receive the driving voltage signal, the movable member 300 is at the first position T1 relative to the fixed member 200 . When a driving voltage signal is applied to the first haptic feedback unit 110 and the second haptic feedback unit 120, the first haptic feedback unit 110 and the second haptic feedback unit 120 are elastically deformed, and the movable member 300 is driven from the first position relative to the fixing member 200. T1 moves to the second position T2. By setting the frequency of the driving voltage signal, the first haptic feedback unit 110 and the second haptic feedback unit 120 can be continuously elastically deformed, thereby driving the movable member 300 to vibrate relative to the fixed member 200 , and then feedback the vibration through the movable member 200 . Out, people can feel the vibration feedback.

In this embodiment, by setting the first elastic piece 21 and the second elastic piece 22 as a medium, the deformation of the piezoelectric element 10 is transmitted to the movable element 300 , which can amplify the small deformation of the piezoelectric element 10 , so that the tactile feedback effect is good. In this embodiment, the specific structures of the first elastic piece 21 and the second elastic piece 22 are not limited, as long as the elastic deformation of the piezoelectric element 10 can drive the elastic deformation of the first elastic piece 21 and the second elastic piece 22 .

In this embodiment, the first elastic piece 21 is arranged on the first side 103 , the second elastic piece 22 is arranged on the second side 104 , and the first distance H from the first surface 101 to the second surface 102 is smaller than that from the first side 103 to the second side 104 . With the second distance W between the two side surfaces 104, the thickness of the piezoelectric element 10 can be made thinner, which saves costs, reduces the overall thickness of the haptic feedback unit 100, and facilitates the thinning of the electronic device using the haptic feedback unit 100 of this embodiment. . In addition, the larger area of the first surface 101 or the second surface 102 is also convenient for setting the electrode connection position, which is convenient for connecting with the electrode inputting the driving voltage signal, and the connection reliability is high.

In this embodiment, the piezoelectric element 10 includes a piezoelectric ceramic, and its structure may be a single-layer piezoelectric ceramic with positive electrode layers and negative electrode layers on the upper and lower sides respectively; the piezoelectric element 10 may also be a multi-layer structure. Piezoelectric ceramics, each layer of piezoelectric ceramics, a positive electrode layer and a negative electrode layer are stacked in sequence. The material of the first elastic piece 21 and the second elastic piece 22 is, for example, metal or metal alloy.

In one embodiment, please refer to FIGS. 1 a and 1 b , the piezoelectric element 10 extends along the first direction Y, and has a first axis of symmetry A in the first direction Y. As shown in FIG. The line connecting the midpoint of the first side surface 103 to the midpoint of the second side surface 104 is the second symmetry axis B, and the first and second

elastic pieces

21 and 22 are symmetrical with respect to the first symmetry axis A and the second symmetry axis B.

In this embodiment, by setting the first elastic piece 21 and the second elastic piece 22 to be symmetrical with respect to the first symmetry axis A and the second symmetry axis B, the structures of the first elastic piece 21 and the second elastic piece 22 are simplified and interchangeable. It is convenient to manufacture, and also makes the deformation of the piezoelectric element 10 drive the deformation of the first elastic piece 21 and the second elastic piece 22, the deformation ability and deformation effect of the first elastic piece 21 and the second elastic piece 22 are symmetrical, and can output a uniform and consistent pulling force or pushing force, The movable member 300 is driven to move regularly relative to the 200 .

In one embodiment, please refer to FIGS. 1a and 1b, the first elastic piece 21 includes a first connecting portion 211, a first extending portion 212, a second connecting portion 213, a second extending portion 214 and a third connecting portion which are connected in sequence. 215. The first connecting portion 211 and the third connecting portion 215 are connected to both ends of the first side surface 103 along the first direction Y, respectively. The second connecting portion 213 is spaced apart from the first side surface 103 , and the second axis of symmetry B passes through the center of the second connecting portion 213 . Please refer to FIG. 1a and FIG. 1c , the second connecting portion 213 is used for connecting with the fixing member 200 , the piezoelectric member 10 is stretched and deformed along the first direction Y, and the piezoelectric member 10 drives the first extending portion 212 and the second extending portion 214 Elastic deformation, the elastic deformation is specifically vibration along the direction of the second symmetry axis.

In this embodiment, the structure of the second elastic piece 22 is symmetrical with that of the first elastic piece 21 , for reference only, the difference is that the second connecting portion of the second elastic piece 22 is used for connecting with the movable member 300 .

In this embodiment, three connecting parts (ie the first connecting part 211 , the second connecting part 213 and the third connecting part 215 ) and the two extending parts (ie the first extending part 212 and the third connecting part 215 ) of the first elastic piece 21 are provided. The structure of the two extension parts 214) is simple in structure, can be stably connected with the piezoelectric element 10 and the fixing element 200, and has good elastic deformation ability, so that the haptic feedback unit 100 can have a strong driving ability.

In one embodiment, please refer to FIG. 1 a and FIG. 2 a , the haptic feedback unit 100 further includes a flexible circuit board 30 , and the flexible circuit board 30 includes a positive electrode connecting portion 31 and a negative electrode connecting portion 32 . The piezoelectric element 10 includes a positive electrode connection portion 11 and a negative electrode connection portion 12 , the positive electrode connection portion 31 is connected to the positive electrode connection portion 11 , and the negative electrode connection portion 32 is connected to the negative electrode connection portion 12 .

In this embodiment, the positive electrode connecting portion 11 and the negative electrode connecting portion 12 of the piezoelectric element 10 can be arranged arbitrarily, as long as the positive electrode connecting portion 11 and the negative electrode connecting portion 12 are directly insulated. For example, the positive electrode connection part 11 is provided on the first surface 101 and the negative electrode connection part 12 is provided on the second surface 102; or, the positive electrode connection part 11 is provided on the first surface 101 and the negative electrode connection part 12 is provided on the first side surface 103, etc., no more examples. The positive electrode connection part 11 and the negative electrode connection part 12 can be a metal layer (such as a silver paste coating) formed on the piezoelectric element 10, and the electrodes in the piezoelectric element 10 are drawn out and connected to the metal layer, or they can be a metal layer. The electrode extraction structure in the electrical component 10 is directly formed.

In this embodiment, the positive connection portion 31 and the negative connection portion 32 of the flexible circuit board 30 may be contacts drawn from the body, and both the positive connection portion 31 and the negative connection portion 32 are provided with metal connection points to connect with the positive electrode The part 11 and the negative electrode connecting part 12 are connected and electrically conducted.

In this embodiment, the positive electrode connecting portion 31 of the flexible circuit board 30 is connected to the positive electrode connecting portion 11 , and the negative electrode connecting portion 32 is connected to the negative electrode connecting portion 12 . The structure is simple and stable, and is not easily damaged.

In an embodiment, please refer to FIG. 1a, FIG. 1b and FIG. 2a, the positive electrode connection part 11 and the negative electrode connection part 12 are both arranged on the first surface 101, and the positive electrode connection part 11 and the negative electrode connection part 12 are arranged between the There is an insulating portion 13 .

In this embodiment, the positive electrode connecting portion 11 and the negative electrode connecting portion 12 are arranged on the same surface, which can be easily connected with the positive electrode connecting portion 31 and the negative electrode connecting portion 32 of the flexible circuit board 30; the area of the first surface 101 is larger than the first surface 101. The area of one side 103 and other surfaces is larger, so that the positive electrode connection part 11 and the negative electrode connection part 12 are made larger, and the flexible circuit board 30 can have a larger connection area and enhance the structural stability.

In this embodiment, the insulating portion 13 is made of insulating material to prevent the positive electrode connecting portion 11 and the negative electrode connecting portion 12 from being short-circuited. The areas of the positive electrode connecting portion 11 and the negative electrode connecting portion 12 may be the same or different, without limitation, for example, the positive electrode connecting portion 11 and the negative electrode connecting portion 12 shown in FIG. The position where the connection part 32 covers) is located at the same end of the first surface 101 along the extension direction of the piezoelectric element 10, and compared with the positive electrode connection part 11 and the negative electrode connection part 12 shown in FIG. 1a, FIG. 2c shows The areas of the positive electrode connection part 11 and the negative electrode connection part 12 are smaller. The area of the positive electrode connection part 31 and the negative electrode connection part 32 may be larger than that of the positive electrode connection part 11 and the negative electrode connection part 12 , so that the positive electrode connection part 11 and the negative electrode connection part 12 are not exposed to the outside world and have a protective effect. It can be understood that there is a distance between the positive electrode connecting portion 31 and the negative electrode connecting portion 32 to prevent short circuit.

In this embodiment, the positive electrode connecting portion 11 is connected to the positive electrode layer, and the positive electrode connecting portion 11 can be formed by leading the positive electrode layer through the side electrode to the first surface 101 from the first side 103 or the second side 104 . Similarly, the negative electrode connecting portion 12 can also be formed by pulling out the negative electrode layer to the first surface 101 through the side electrodes.

In other embodiments, the insulating portion 13 may not be provided, and the purpose of avoiding short circuit can be achieved by directly having a separation distance between the positive electrode connecting portion 11 and the negative electrode connecting portion 12 .

In an embodiment, please refer to FIG. 2b and FIG. 2c, in conjunction with FIG. 1b, the haptic feedback unit 100 further includes a protective layer 40, the protective layer 40 is disposed on the first surface 101, and the protective layer 40 extends to the first side surface 103 and The second side surface 104 is used to cover the connection position of the piezoelectric element 10 with the first elastic piece 21 and the second elastic piece 22 .

In this embodiment, since the first elastic piece 21 and the second elastic piece 22 and the piezoelectric element 10 are usually glued together, they are easily corroded by water vapor in the air and the glued joint fails. Therefore, the protective layer 40 is provided to extend to the first The side 103 and the second side 104 are used to cover the connection position of the piezoelectric element 10 and the first elastic piece 21 and the second elastic piece 22 to protect the bonding between the first elastic piece 21 and the second elastic piece 22 and the piezoelectric element 10 the role of structure. The material of the protective layer 40 is, for example, glue.

In this embodiment, the protective layer 40 may be provided on a part of the first surface 101 , or may be provided on the entire first surface 101 . Referring to FIG. 2 b , in an embodiment, protective layers are respectively disposed on both ends of the first surface 101 , ie, the first protective layer 41 and the second protective layer 42 . Referring to FIG. 2c, in an embodiment, the protective layer 40 may also be disposed on one end of the first surface 101, and the other end where the positive electrode connecting portion 31 and the negative electrode connecting portion 32 are provided is not provided, and the protective layer 40 is not provided for consideration Although the water vapor will affect the bonding structure between the elastic sheet and the piezoelectric element 10 , the effect is still within a controllable range, so as to prevent the protective layer 40 from affecting the structure and electrical connection stability of the positive electrode connecting portion 31 and the negative electrode connecting portion 32 .

In this embodiment, the protective layer 40 may be directly disposed on the first surface 101 , and then the positive electrode connecting portion 11 and the negative electrode connecting portion 12 are disposed on the protective layer 40 . The protective layer 40 may also be disposed on the side of the flexible circuit board 30 facing away from the first surface 101 .

In one embodiment, please refer to FIGS. 3 a to 3 d and 3 f , and in conjunction with FIG. 1 b , the positive electrode connecting portion 11 and the negative electrode connecting portion 12 are disposed on the same side, for example, both are disposed on the first surface 101 . There is an interval between the positive electrode connection portion 11 and the negative electrode connection portion 12 , and an insulating portion can be provided in the space of the interval distance, which can be referred to the description in the foregoing embodiments. The positive electrode connection portion 31 is connected to the positive electrode connection portion 11 , and the negative electrode connection portion 32 is connected to the negative electrode connection portion 12 .

The haptic feedback unit 100 further includes an insulating layer 15, the insulating layer 15 is arranged on the first surface 101, the positive electrode connecting part 11 and the negative electrode connecting part 12 are both arranged on the insulating layer 15, and the positive electrode connecting part 11 and the negative electrode connecting part are arranged on the insulating layer 15. 12 is electrically connected to the electrodes of the first side 103 or the second side 104 .

In this embodiment, by disposing the insulating layer 15 to isolate the positive electrode connecting portion 11 and the negative electrode connecting portion 12 from the piezoelectric element 10 , the positive electrode connecting portion 11 and the negative electrode connecting portion 12 and the interior of the piezoelectric element 10 can be avoided. Electrodes are shorted. The positive electrode connection portion 11 and the negative electrode connection portion 12 are electrically connected to the electrodes of the first side surface 103 or the second side surface 104 to achieve electrical conduction with the internal electrodes of the piezoelectric element 10 . The material of the insulating layer 15 is, for example, insulating ink.

This embodiment does not need to limit the connection positions of the first elastic piece 21 and the second elastic piece 22 and the piezoelectric element 21 . Optionally, the first elastic piece 21 is connected to the first side 103 , and the second elastic piece 22 is connected to the second side 104 . .

In an embodiment, please refer to FIG. 3c , FIG. 3d and FIG. 3h , the haptic feedback unit further includes an insulating adhesive layer 16 , and the insulating adhesive layer 16 is arranged on the insulating layer spaced between the positive electrode connecting portion 11 and the negative electrode connecting portion 12 . 15 , the insulating adhesive layer 16 connects the insulating layer 15 and the flexible circuit board 30 and is used for insulating and isolating the positive electrode connecting portion 11 and the negative electrode connecting portion 12 .

In this embodiment, by disposing the insulating adhesive layer 16 to connect the insulating layer 15 and the flexible circuit board 30, the flexible circuit board 30 is integrated with the insulating layer 15 and the piezoelectric element 10, and the structure is more stable. The insulating adhesive layer 16 is, for example, a DAF (Die Attach Film, adhesive film) film, and the DAF film is non-conductive and has good insulation and adhesion.

In an embodiment, please refer to FIG. 3e and FIG. 3g , the conductive adhesive 17 is dotted between the positive electrode connecting portion 31 and the positive electrode connecting portion 11 for conductive connection. Since the insulating layer 15 and the flexible circuit board 30 are connected by the insulating glue layer 16 , and the positive electrode connecting part 31 and the positive electrode connecting part 11 are glued and electrically connected by means of the conductive glue 17 , the overall structure is more stable. It can be understood that, conductive glue may also be dispensed between the negative electrode connecting portion 32 and the negative electrode connecting portion 12 .

Referring to FIGS. 3 a to 3 h , a manufacturing process of the haptic feedback unit according to an embodiment is as follows: the insulating layer 15 is brushed on the first surface 101 of the piezoelectric element 10 ; the positive electrode connecting portion 11 and the negative electrode are printed on the insulating layer 15 connecting part 12; making an insulating adhesive layer 16 in the interval area between the positive electrode connecting part 11 and the negative electrode connecting part 12; attaching the flexible circuit board 30 to the insulating adhesive layer 16, wherein the positive electrode connecting part 31 corresponds to the positive electrode The connection part 11 and the negative electrode connection part 32 correspond to the negative electrode connection part 12 ;

In an embodiment, please refer to FIG. 3i to FIG. 3m, the haptic feedback unit further includes a first conductive adhesive layer 181 and a second conductive adhesive layer 182, the first conductive adhesive layer 181 is connected to the positive electrode connecting portion 31 and the positive electrode connecting portion 11, The second conductive adhesive layer 182 connects the negative electrode connecting portion 32 and the negative electrode connecting portion 12 .

In this embodiment, the insulating adhesive layer 16 (refer to FIG. 3h ) does not need to be disposed between the insulating layer 15 and the flexible circuit board 30 , but the adhesive bonding is realized by the adhesive bonding of the first conductive adhesive layer 181 and the second conductive adhesive layer 182 And electrical connection, subsequent conductive glue is not required, which can reduce the process. In order to enhance the adhesive bonding stability, the areas of the positive electrode connecting portion 11 and the negative electrode connecting portion 12 can be made larger. In this embodiment, the first conductive adhesive layer 181 and the second conductive adhesive layer 182 may be anisotropic conductive paste (ACP) or ACF (Anisotropic Conductive Film), Conductive and adhesive.

Referring to FIGS. 3k and 3n , the space between the positive electrode connecting portion 11 and the negative electrode connecting portion 12 , that is, between the insulating layer 15 and the flexible circuit board 30 may not be filled, so that the first conductive adhesive layer 181 , the first conductive adhesive layer 181 , the The two conductive adhesive layers 182 , the insulating layer 15 and the flexible circuit board 30 enclose the cavity 19 . In other embodiments, as shown in the embodiments of FIG. 3 b to FIG. 3 h , the cavity 19 can also be filled with an insulating adhesive layer. Alternatively, the first conductive adhesive layer 181 and the second conductive adhesive layer 182 are integrated into the entire adhesive layer structure, which can also fill the cavity 19 at the same time, and the first conductive adhesive layer 181 and the second conductive adhesive layer 182 are in different directions. The conductive adhesive can only conduct electricity in one direction (ie, vertical conduction, horizontal non-conductivity), so the positive electrode connecting portion 11 and the negative electrode connecting portion 12 will not be short-circuited.

Referring to FIGS. 3i to 3n , a manufacturing process of the haptic feedback unit according to an embodiment is as follows: the insulating layer 15 is brushed on the first surface 101 of the piezoelectric element 10 ; the positive electrode connecting portion 11 and the negative electrode are printed on the insulating layer 15 connection part 12; make a first conductive adhesive layer 181 on the positive electrode connection part 11, and make a second conductive adhesive layer 182 on the negative electrode connection part 12; paste the positive connection part 31 of the flexible circuit board 30 to the first conductive adhesive Layer 181 , the negative electrode connecting portion 32 is pasted to the second conductive adhesive layer 182 .

In an embodiment, please refer to FIG. 1 a and FIG. 4 a , in the extending direction of the second axis of symmetry B, the size of the second connecting portion 213 is the width of the first elastic piece 21 . When the width of the first elastic piece 21 is the first width W1, the driving force of the haptic feedback unit 100 is the first driving force. When the driving force required by the haptic feedback unit 100 is the second driving force, and the second driving force is smaller than the first driving force, the width of the first elastic piece 21 is set as the second width W2, and the second width W2 is greater than the first width W1 .

In this embodiment, under the condition that the structure and size of the piezoelectric element 10 remain unchanged, and the driving voltage signal is also unchanged, the driving force can be changed by changing the width of the first elastic piece 21 . When the second width W2 is greater than the first width W1, the second driving force is smaller than the first driving force. In other words, as the width of the first elastic piece 21 becomes wider, the driving force becomes smaller. It can be understood that, when the second width W2 is smaller than the first width W1, the second driving force is greater than the first driving force, that is, the width of the first elastic piece 21 is narrowed, and the driving force will increase. Therefore, by adjusting the width of the first elastic piece 21, the driving force of the haptic feedback unit 100 can be adjusted.

In an embodiment, please refer to FIGS. 1 a , 1 b and 4 b , in a direction perpendicular to the first surface 101 , the size of the first elastic piece 21 is the thickness of the first elastic piece 21 . When the thickness of the first elastic piece 21 is the first thickness H1, the driving force of the haptic feedback unit 100 is the third driving force. When the driving force required by the haptic feedback unit 100 is the fourth driving force, and the fourth driving force is smaller than the third driving force, the thickness of the first elastic sheet 21 is set to the second thickness H2, and the second thickness H2 is greater than the first thickness H1 .

In this embodiment, under the condition that the structure and size of the piezoelectric element 10 are unchanged, and the driving voltage signal is also unchanged, the driving force can be changed by changing the thickness of the first elastic piece 21. When the second thickness H2 is greater than the first thickness H1, the second driving force is smaller than the first driving force. In other words, as the thickness of the first elastic piece 21 increases, the driving force decreases. It can be understood that, when the second thickness H2 is smaller than the first thickness H1, the second driving force is greater than the first driving force, that is, the thickness of the first elastic sheet 21 becomes thinner, and the driving force increases. Therefore, by adjusting the thickness of the first elastic piece 21, the driving force of the haptic feedback unit 100 can be adjusted.

Please refer to FIG. 5a and FIG. 5e, an embodiment of the present application further provides a haptic feedback device, including a fixing member 200, a movable member 300, and the haptic feedback unit 100 provided by the embodiment of the present application. The haptic feedback unit 100 is connected to the fixing member 200 and the haptic feedback unit 100. Between moving parts 300.

Optionally, please refer to FIG. 5e, the number of haptic feedback units is two, namely the first haptic feedback unit 110 and the second haptic feedback unit 120, and the first haptic feedback unit 110 and the second haptic feedback unit 120 are respectively arranged in the active On the opposite sides of the component 300 , the movable component 300 is driven to move relative to the fixed component 200 through the deformation of the two tactile feedback units.

Optionally, please refer to FIG. 5e, which is basically the same as the embodiment shown in FIG. 5a, except that the number of haptic feedback units 100 is one, and the deformation of one haptic feedback unit 100 drives the movable member 300 to move relative to the fixed member.

In this embodiment, the tactile feedback unit 100 provided in the embodiment of the present application is provided to connect the fixing member 200 and the movable member 300, and the elastic deformation of the haptic feedback unit 100 drives the movable member 300 to move relative to the fixing member 200, so as to realize haptic feedback, and the structure is simple. .

In an embodiment, please continue to refer to FIG. 5a and FIG. 5e, the fixing member 200 is in the shape of a ring frame and encloses the first accommodating space, the first haptic feedback unit 110 and the second haptic feedback unit 120 and the movable member 300 are all accommodated placed in the first accommodating space.

In this embodiment, the annular frame of the fixing member 200 may be in the shape of a rectangular frame, a circular frame, or the like. For example, Fig. 5a shows that the annular frame of the fixing member 200 is a rectangular frame, and Fig. 5j shows that the annular frame of the fixing member 200 is a circular frame. It can be understood that the annular frame of the fixing member 200 may also have other shapes, which will not be described again.

In this embodiment, by arranging a ring-shaped frame structure of the fixing member 200 and forming a first accommodating space to accommodate other components, the overall structure of the haptic feedback device is compact, for example, it saves space and is convenient for manufacture and assembly.

In other embodiments, the fixing member 200 may not be frame-shaped, for example, as shown in FIG.

Referring to Fig. 5a, the first tactile feedback unit 110 and the second tactile feedback unit 120 can be arranged laterally, so as to drive the movable member 300 to move laterally relative to the fixed member 200 (the direction indicated by the arrow in Fig. 5a).

Referring to FIG. 5b, the first tactile feedback unit 110 and the second tactile feedback unit 120 can be arranged in the longitudinal direction, so as to drive the movable member 300 to move in the longitudinal direction relative to the fixed member 200 (the direction indicated by the arrow in FIG. 5b).

In an embodiment, please refer to FIG. 5a and FIG. 5e. Similar to the aforementioned fixed member 200 in the shape of a ring frame, in this embodiment, the movable member is set in the shape of a ring frame, and encloses the second accommodating space, and the first tactile feedback The unit and the second haptic feedback unit and the fixing member are all accommodated in the second accommodating space.

In this embodiment, the fixing member 200 of the previous embodiment is in the shape of a ring frame, and the movable member 300 is accommodated in the scheme exchange position of the first accommodating space, that is, the movable member is in the shape of a ring frame, and the fixing member is accommodated in the second accommodating space , the elastic deformation of the haptic feedback unit can also achieve the purpose of driving the movable piece to move relative to the fixed piece.

It should be understood that, no matter whether the fixed part 200 is in the shape of a ring frame and the movable part 300 is accommodated in the first accommodating space, or the solution in which the fixed part and the movable part are exchanged, the movable part 300 should be connected with each other during the movement process. The fixing member 200 has a distance without touching, so as to avoid damage to the device by knocking.

In an embodiment, please refer to FIG. 5e , the first elastic piece 21 and the fixing member 200 are integrally constructed, the second elastic sheet 22 and the movable member 300 are integrally constructed, and the piezoelectric member 10 is connected to the first elastic sheet 21 and the second elastic piece 200 . between the shrapnel 22.

In this embodiment, the fixing member 200 and the first elastic piece 21 can be processed and formed on the same metal plate, and the movable member 300 and the second elastic piece 22 can be processed and formed on the same metal plate. By arranging the first elastic piece 21 and the fixing piece 200 as an integral structure, and the second elastic piece 22 and the movable piece 300 as an integral structure, there is no need to set a connection process between the first elastic piece 21 and the fixing piece 200, and the integral structure The strength is high, the connection is stable, and the second elastic piece 22 and the movable part 300 are one-piece structure, which also has the same technical effect.

Specifically, please continue to refer to FIG. 5e and in conjunction with FIG. 1b , the side of the first elastic piece 21 facing away from the first side 103 is integrated with the fixing member 300 , and the side of the second elastic piece 22 facing away from the second side 104 is integrated with the fixing member 300 . The movable part 300 is a one-piece structure. The integrated structure of the first elastic piece 21 and the fixing member 200 can not affect the elastic deformation of the first elastic piece 21, and the second elastic piece 22 also has the same technical effect.

Further, please refer to FIG. 1a, FIG. 1b and FIG. 5e, taking the first elastic piece 21 as an example, and the second elastic piece 22 for reference. The second connecting portion 213 of the first elastic piece 21 and the fixing member 200 are integral structures. In this way, the first extension portion 212 and the second extension portion 214 can be deformed freely without being affected by the fixing member 200 .

In an embodiment, please refer to FIG. 5a and FIG. 5d, the haptic feedback device further includes a touch cover 500, the touch cover 500 is connected with the movable part 300, the fixed part 300 is fixed to a fixed position such as a casing of the electronic device, and the movable part When the 300 moves relative to the fixing member 200 , it drives the touch cover 500 to move at the same time, so that the finger in contact with the touch cover 500 can receive the vibration feedback of the touch.

In an embodiment, please refer to FIG. 5 a and FIG. 5 d , the touch cover 500 and the movable member 300 are connected by an adhesive member 400 .

In other embodiments, the touch cover 500 and the movable member 300 may also have an integrated structure, that is, the whole of the touch cover 500 and the movable member 300 may also be collectively referred to as a movable member.

In an embodiment, please refer to FIG. 5b and FIG. 5c, the glue joint includes a first glue joint 410 and a second glue joint 420, the first glue joint 410 connects the movable piece 300 and the touch cover 500, the second glue joint The adhesive member 420 is connected to the fixing member 200 and is used for connecting to a fixing position such as a housing of an electronic device. The specific structure of the first adhesive member 410 is not limited. For example, the first adhesive member 410 includes a plurality of strip-like structures distributed at different positions of the movable member 300, or the first adhesive member 410 is an entire layered structure covering The entire surface of the movable member 300 or the like may be used. The structure of the second adhesive member 420 can also be referred to the arrangement of the first adhesive member 410 , and details are not repeated here. By arranging the glue joint 400 , the connection between the touch cover plate 500 , the pressure sensing element 700 and the movable element 300 is more stable.

Referring to FIG. 5c, when the fixing member 200 is in the shape of an annular frame, the first adhesive member 410 connects the movable member in the first accommodating space and the touch cover 500, and the second adhesive member 420 connects between the annular frame-shaped fixing member The side facing away from the touch cover 500 .

Referring to FIG. 5d, when the movable member 300 is in the shape of an annular frame, the first adhesive member 410 is connected to the annular frame structure and the touch cover 500, and the second adhesive member 420 is connected to the back of the fixing member in the second accommodating space Touch one side of the cover 500 .

Please refer to FIGS. 5e and 5f , as well as FIGS. 5g and 5h , when the number of haptic feedback units 100 is one, the technical solution is similar, that is, the adhesive member 400 connects the movable member 300 and the touch cover 500 .

In an embodiment, please refer to FIGS. 5a, 5e, 5g, 5i and 5j, the shape of the movable part 300 and the fixed part 200 may have correspondence, that is, the shapes of the movable part 300 and the fixed part 200 match, and the two They are in the same, complementary and parallel relationship.

Specifically, Figures 5a and 5e show that the shape of the movable part 300 is substantially the same as the shape of the fixed part 200; Figure 5g shows that the shape of the movable part 300 and the shape of the fixed part 200 are substantially the same and parallel to each other; Fig. 5j shows that the shape of the movable member 300 is complementary to the shape of the fixed member 200, and the distance between them is approximately the same.

In an embodiment, please refer to FIG. 6a, the haptic feedback device further includes a control member (not shown in the figure) and a pressure sensing member 700, the control member is electrically connected with the haptic feedback unit 100 and the pressure sensing member 700, and the pressure sensing member 700 is electrically connected. It is arranged on the side of the fixed part 200 or the movable part 300 facing the touch cover plate 500 to sense the pressure of the touch cover plate 500 and transmit the piezoelectric signal to the control part, and the control part outputs the driving voltage signal to the haptic feedback according to the piezoelectric signal In the unit 100 , the haptic feedback unit 100 receives the driving voltage signal to generate elastic deformation, so that the movable member 300 vibrates relative to the fixed member 200 and drives the touch cover 500 to vibrate.

In this embodiment, the pressure sensing element 700 may be a piezoelectric structure such as piezoelectric ceramics, and the pressure sensing element 700 is used to sense the pressure of the touch cover plate 500 . The pressure of the touch cover plate 500 is generally exerted by human fingers.

In this embodiment, by setting the pressure sensing element 700 to sense the pressure of the touch cover 500, the subtle pressure and pressure changes of the touch cover 500 can be sensed more accurately, so that the haptic feedback unit 100 (or the first haptic feedback The unit 110 and the second haptic feedback unit 120) can make more accurate haptic feedback.

In one embodiment, the number of the pressure sensing elements 700 may be multiple, and the multiple pressure sensing elements 700 are evenly distributed on the fixed element 200 or the movable element 300 . As shown in FIG. 6 a , the number of pressure sensing elements 700 is 4, and they are evenly distributed around the fixing element 200 . In other embodiments, the number of the pressure sensing elements 700 may also be other numbers. The multiple pressure sensing elements 700 can sense pressures at different positions, so as to facilitate the realization of different haptic feedback effects.

In other embodiments, the pressure sensing element 700 may not be provided, but the pressure of the touch cover plate 500 may be sensed through the piezoelectric element 10 of the haptic feedback unit 100 .

In one embodiment, please refer to FIG. 6 a , the pressure sensing member 700 is disposed on the movable member 300 , and the adhesive member 400 connects the pressure sensing member 700 and the touch cover 500 . The pressure of the touch cover 500 is transmitted to the pressure sensing member 700 through the adhesive member 400 .

In an embodiment, please refer to 6b, the first adhesive member 410 is disposed on the movable member 300 , the first adhesive member 410 is connected to the pressure sensing member 700 and the movable member 200 , and the second adhesive member 420 is connected to the fixed member 200 . The side facing away from the touch cover 500 . The pressure of the touch cover 500 is directly transmitted to the pressure sensing member 700 .

In an embodiment, please refer to FIG. 6c , the pressure sensing member 700 is disposed on the fixing member 200 , the first adhesive member 410 is connected to the movable member and the touch cover 500 , and the second glued member 420 is connected to the back of the fixing member 200 . Touch one side of the cover 500 . The pressure of the touch cover 200 is directly transmitted to the pressure sensing member 700 .

In an embodiment, please refer to FIG. 1c and FIG. 7a, the control element is electrically connected to the first tactile feedback unit 110 and the second tactile feedback unit 120, and the control element is output to the first tactile feedback unit 110 and the second tactile feedback unit 120. The driving voltage signals of 120 are opposite, so that the deformation directions of the first haptic feedback unit 110 and the second haptic feedback unit 120 are opposite, and the movable member 300 is driven to move in the same direction.

Specifically, please refer to FIG. 1a and FIG. 1c , and the moving member 300 moves relative to the fixing member 200 from the T1 position shown in FIG. 1c to the T2 position as an example for description. When the control element outputs opposite driving voltage signals to the first haptic feedback unit 110 and the second haptic feedback unit 120, the piezoelectric element 10 of the first haptic feedback unit 110 is stretched (for the direction, please refer to the first haptic feedback unit 110 in FIG. 1c ). shown by the arrow in ), drive the first elastic piece 21 and the second elastic piece 22 of the first haptic feedback unit 110 to deform, thereby pulling the movable member 300 to move toward the left side of the fixed member 200 (for the direction, please refer to the movable member 300 in FIG. 1c ). arrow). At the same time, since the driving voltage signal of the second haptic feedback unit 120 is opposite, the piezoelectric element 10 of the second haptic feedback unit 120 is shortened (the direction is shown by the arrow in the second haptic feedback unit 120 in FIG. 1 c ), driving the second haptic feedback unit 120 The first elastic piece 21 and the second elastic piece 22 of the haptic feedback unit 120 are deformed, thereby pushing the movable piece 300 to move toward the left side of the fixed piece 200 (for the direction, please refer to the arrow in the movable piece 300 in FIG. 1 c ).

Therefore, by setting the driving voltage signals of the control element to the two haptic feedback units to be opposite, a larger driving force can be given to the movable element 300, so that the haptic feedback of the haptic feedback device is more pronounced. , the overall structure is also more stable.

When the moving direction of the movable member 300 needs to be changed, the direction of the output voltage signal of the control member can be adjusted. In addition, when the speed of movement and the speed of direction change of the movable member 300 need to be changed, the magnitude and frequency of the output voltage signal of the control member can also be adjusted.

In one embodiment, please refer to FIG. 7 a and FIG. 7 c , the haptic feedback device further includes a connecting lead, and the control element includes a signal output terminal 610 and a ground terminal 620 .

The connection leads include a first lead 610 , a second lead 612 , a third lead 621 and a fourth lead 622 . The first lead 611 is connected to the signal output terminal 610 and the positive electrode connection part of the first haptic feedback unit 110, the second lead 612 is connected to the signal output terminal 610 and the negative electrode connection part of the second haptic feedback unit 120, and the third lead 621 is connected to ground The terminal 620 is connected to the negative electrode connection part of the first haptic feedback unit 110 , and the fourth lead 622 is connected to the ground terminal 620 and the positive electrode connection part of the second haptic feedback unit 120 .

In this embodiment, the four leads from the first lead 611 to the fourth lead 622 are connected in parallel with the first haptic feedback unit 110 and the second haptic feedback unit 120 . Through the parallel connection of the control element and the two haptic feedback units, the opposite driving voltage signals are output to the two haptic feedback units.

In an embodiment, please refer to FIG. 7 b , the connection lead includes a fifth lead 613 , a sixth lead 614 and a seventh lead 623 , and the fifth lead 613 is connected to the signal output terminal 610 and the positive electrode connection part of the first haptic feedback unit 110 . , the sixth lead 614 is connected to the negative electrode connecting part of the first haptic feedback unit 110 and the negative electrode connecting part of the second haptic feedback unit 120, and the seventh lead 623 is connected to the positive electrode connecting part of the second haptic feedback unit 120 and the ground terminal 620 .

In this embodiment, the three leads from the fifth lead 613 to the seventh lead 623 are connected in series with the first haptic feedback unit 110 and the second haptic feedback unit 120 . Through the series connection of the control element and the two haptic feedback units, the opposite driving voltage signals are output to the two haptic feedback units.

7a and 7b, when a finger presses the touch cover 500, the touch cover 500 conducts the pressure to the aforementioned pressure sensing element 700 (refer to FIG. 6a to FIG. 6c), or the touch cover 500 conducts the pressure On the first haptic feedback unit 110 and/or the second haptic feedback unit 120, the pressure sensing element 700, the first haptic feedback unit 110 and/or the second haptic feedback unit 120 sense the pressure of the touch cover 500, and transmit the pressure to the touch cover 500. The electrical signal is transmitted to the control element, the control element receives the electrical signal of the pressure and outputs a driving voltage signal, and the driving voltage signal is transmitted to the first tactile feedback unit 110 and the second tactile feedback unit 120 in parallel or in series to realize the first A haptic feedback unit 110 and a second haptic feedback unit 120 drive the movable member 300 to move in the same direction.

In Figs. 7b and 7c, the moving direction of the touch cover 500 follows the moving direction of the movable member 300. The arrows on one side of the touch cover 500 in Figs. 7b and 7c show that the moving direction is lateral. The arrows in the first haptic feedback unit 110 and the second haptic feedback unit 120 in FIGS. 7b and 7c show the flow direction of the internal current.

Please refer to FIG. 8a to FIG. 8e , an embodiment of the present application further provides an electronic device, including the haptic feedback device provided by an embodiment of the present application.

In an embodiment, please refer to FIG. 8a, the electronic device is a notebook computer, and the haptic feedback device can be arranged at the display screen and the touch pad. When the finger touches the display screen or the touch pad, the haptic feedback device can generate vibration feedback (vibration feedback). The direction is shown by the arrow in Fig. 8a), so that the finger feels the tactile feedback.

In an embodiment, please refer to FIG. 8b and FIG. 8c, the electronic device is a smart phone, and the haptic feedback device is arranged at the display screen of the smart phone. When the finger touches the display screen, the haptic feedback device can generate vibration feedback, so that the Fingers feel haptic feedback. Fig. 8b shows the longitudinal arrangement of the haptic feedback device, and the vibration direction is also the longitudinal direction (indicated by the arrow in Fig. 8b). Fig. 8c shows the manner in which three haptic feedback devices are arranged laterally side by side, and the vibration direction is lateral (indicated by arrows in Fig. 8c).

In one embodiment, please refer to FIG. 8d, the electronic device is a central control screen of a car, and the haptic feedback device is arranged at the display screen of the central control screen of the car. When the finger touches the display screen, the haptic feedback device can generate vibration feedback (vibration feedback). The direction is shown by the arrow in Fig. 8d), so that the finger feels the tactile feedback.

In one embodiment, please refer to FIG. 8e, the electronic device is a smart watch, and the haptic feedback device is arranged at the display screen of the smart watch. When a finger touches the display screen, the haptic feedback device can generate vibration feedback (refer to FIG. 8e for the direction of vibration. arrow in the middle), so that the finger feels tactile feedback.

What is disclosed above is only a preferred embodiment of the present application, and of course, it cannot limit the scope of the right of the present application. Those of ordinary skill in the art can understand all or part of the process of implementing the above-mentioned embodiment, and the rights of the present application are not limited by this. The equivalent changes required are still within the scope of the application.

Claims

A tactile feedback unit is characterized in that it includes a piezoelectric element, a first elastic sheet and a second elastic sheet, the piezoelectric element includes a first surface and a second surface that are parallel and opposite to each other, and a parallel and opposite to each other. The first side and the second side, the vertical distance from the first surface to the second surface is the first distance, the vertical distance from the first side to the second side is the second distance, the first The distance is smaller than the second distance, the first elastic piece is connected to the first side surface, the second elastic piece is connected to the second side surface, and the side of the first elastic piece that faces away from the first side surface used for connecting to a fixed piece, the side of the second elastic piece facing away from the second side surface is used for connecting to a movable piece; the piezoelectric piece is used for receiving a driving voltage signal to deform and drive the first The elastic sheet and the second elastic sheet are elastically deformed, so that the movable member is displaced relative to the fixed member.
The tactile feedback unit according to claim 1, wherein the piezoelectric element extends along a first direction and has a first axis of symmetry in the first direction, and the midpoint of the first side surface reaches the A line connecting the midpoints of the second side surface is a second axis of symmetry, and the first and second elastic pieces are symmetrical with respect to the first and second symmetry axes.
The tactile feedback unit according to claim 2, wherein the first elastic piece comprises a first connecting part, a first extending part, a second connecting part, a second extending part and a third connecting part which are connected in sequence, so The first connecting portion and the third connecting portion are respectively connected to both ends of the first side surface along the first direction, the second connecting portion and the first side surface are spaced apart, and the first side surface is spaced apart. Two axes of symmetry pass through the center of the second connecting portion, the second connecting portion is used to connect with the fixing member, the piezoelectric member is stretched and deformed along the first direction, and the piezoelectric member drives the The first extension portion and the second extension portion are elastically deformed.
The tactile feedback unit according to any one of claims 1 to 3, wherein the tactile feedback unit further comprises a flexible circuit board, the flexible circuit board includes a positive electrode connection part and a negative electrode connection part, and the piezoelectric element It includes a positive electrode connection part and a negative electrode connection part, the positive electrode connection part is connected with the positive electrode connection part, the negative electrode connection part is connected with the negative electrode connection part; the positive electrode connection part is connected with the negative electrode The connection parts are all arranged on the first surface, and an insulating part is provided between the positive electrode connection part and the negative electrode connection part.
The tactile feedback unit according to claim 4, wherein the positive electrode connection part and the negative electrode connection part are located at the same end of the first surface along the extension direction of the piezoelectric element.
The haptic feedback unit of claim 4, wherein the haptic feedback unit further comprises a protective layer, the protective layer is disposed on the first surface, and the protective layer extends to the first side surface and the The second side surface covers the connection position of the piezoelectric element with the first elastic sheet and the second elastic sheet.
A tactile feedback device, characterized in that it comprises a fixed piece, a movable piece and the haptic feedback unit according to any one of claims 1 to 6, wherein the haptic feedback unit is connected between the fixed piece and the movable piece between.
The tactile feedback device according to claim 7, wherein the fixing member is in the shape of a ring frame and encloses the first accommodating space, the number of the tactile feedback units is two, and the two tactile feedback units Both the movable element and the movable element are accommodated in the first accommodating space, and two tactile feedback units are respectively provided on opposite sides of the movable element.
The tactile feedback device according to claim 7, wherein the movable member is in the shape of a ring frame and encloses the second accommodating space, the number of the tactile feedback units is two, and the two tactile feedback units Both the fixing piece and the fixing piece are accommodated in the second accommodating space, and two opposite sides of the fixing piece are respectively provided with the tactile feedback unit.
An electronic device, characterized by comprising the haptic feedback device according to any one of claims 7 to 9.