WO2022006844A1 - Unité de rétroaction tactile, dispositif de rétroaction tactile et appareil électronique - Google Patents

Unité de rétroaction tactile, dispositif de rétroaction tactile et appareil électronique Download PDF

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Publication number
WO2022006844A1
WO2022006844A1 PCT/CN2020/101308 CN2020101308W WO2022006844A1 WO 2022006844 A1 WO2022006844 A1 WO 2022006844A1 CN 2020101308 W CN2020101308 W CN 2020101308W WO 2022006844 A1 WO2022006844 A1 WO 2022006844A1
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Prior art keywords
haptic feedback
feedback unit
tactile feedback
elastic piece
connection part
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PCT/CN2020/101308
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English (en)
Chinese (zh)
Inventor
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
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Priority to PCT/CN2020/101308 priority Critical patent/WO2022006844A1/fr
Publication of WO2022006844A1 publication Critical patent/WO2022006844A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer

Definitions

  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the structure 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.
  • 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
  • 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. .
  • 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.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • 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
  • 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
  • the movable part is accommodated in the first accommodating space, that is, the movable part is in the shape of a ring frame
  • the fixed part is accommodated in the second accommodating space, which can also realize the elastic deformation of the haptic feedback unit.
  • the present application provides an electronic device, including the haptic feedback device according to any one of the various embodiments of the second aspect.
  • FIG. 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
  • FIG. 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;
  • FIG. 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
  • FIG. 7a is a schematic diagram of a circuit connection structure of a haptic feedback device according to an embodiment
  • FIG. 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
  • FIG. 8a is a schematic structural diagram of a haptic feedback device according to an embodiment
  • FIG. 8b is a schematic structural diagram of a haptic feedback device according to an embodiment
  • FIG. 8c is a schematic structural diagram of a haptic feedback device according to an embodiment
  • FIG. 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.
  • 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
  • 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
  • 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
  • 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.
  • 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.
  • the first haptic feedback unit 110 and the second haptic feedback unit 120 are respectively disposed on opposite sides of the movable member 300 and are respectively connected with the fixing member 200 .
  • the movable member 300 is at the first position T1 relative to the fixed member 200 .
  • the first haptic feedback unit 110 and the second haptic feedback unit 120 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.
  • 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.
  • 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.
  • 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 .
  • the first elastic piece 21 is arranged on the first side 103
  • the second elastic piece 22 is arranged on the second side 104
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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 .
  • 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.
  • 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 .
  • three connecting parts ie the first connecting part 211 , the second connecting part 213 and the third connecting part 215
  • the two extending parts ie the first extending part 212 and the third connecting part 215
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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.
  • the positive electrode connecting portion 31 of the flexible circuit board 30 is connected to the positive electrode connecting portion 11
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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 .
  • 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.
  • 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 .
  • 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 .
  • 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.
  • 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 .
  • 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.
  • 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 .
  • 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 .
  • 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
  • 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 .
  • 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.
  • first elastic piece 21 is connected to the first side 103
  • second elastic piece 22 is connected to the second side 104 .
  • 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 .
  • 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 .
  • 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.
  • 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 .
  • a manufacturing process of the haptic feedback unit 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 ;
  • 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 .
  • 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.
  • the areas of the positive electrode connecting portion 11 and the negative electrode connecting portion 12 can be made larger.
  • 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.
  • the space between the positive electrode connecting portion 11 and the negative electrode connecting portion 12 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 .
  • the cavity 19 can also be filled with an insulating adhesive layer.
  • 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.
  • a manufacturing process of the haptic feedback unit 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 .
  • the size of the second connecting portion 213 is the width of the first elastic piece 21 .
  • the driving force of the haptic feedback unit 100 is 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 .
  • the driving force can be changed by changing the width of the first elastic piece 21 .
  • the second width W2 is greater than the first width W1
  • the second driving force is smaller than the first driving force.
  • 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.
  • the size of the first elastic piece 21 is the thickness of the first elastic piece 21 .
  • the driving force of the haptic feedback unit 100 is the third driving force.
  • 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 .
  • the driving force can be changed by changing the thickness of the first elastic piece 21.
  • the second thickness H2 is greater than the first thickness H1
  • the second driving force is smaller than the first driving force.
  • 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.
  • 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.
  • 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
  • the movable component 300 is driven to move relative to the fixed component 200 through the deformation of the two tactile feedback units.
  • 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.
  • 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. .
  • 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.
  • the annular frame of the fixing member 200 may be in the shape of a rectangular frame, a circular frame, or the like.
  • Fig. 5a shows that the annular frame of the fixing member 200 is a rectangular frame
  • 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.
  • the overall structure of the haptic feedback device is compact, for example, it saves space and is convenient for manufacture and assembly.
  • the fixing member 200 may not be frame-shaped, for example, as shown in FIG.
  • 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).
  • 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).
  • 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.
  • the fixing member 200 of the previous embodiment is in the shape of a ring frame
  • 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
  • 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.
  • 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.
  • 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
  • the piezoelectric member 10 is connected to the first elastic sheet 21 and the second elastic piece 200 . between the shrapnel 22.
  • the fixing member 200 and the first elastic piece 21 can be processed and formed on the same metal plate
  • the movable member 300 and the second elastic piece 22 can be processed and formed on the same metal plate.
  • the side of the first elastic piece 21 facing away from the first side 103 is integrated with the fixing member 300
  • 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.
  • 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 .
  • 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.
  • the touch cover 500 and the movable member 300 are connected by an adhesive member 400 .
  • 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.
  • 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.
  • 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.
  • the first adhesive member 410 connects the movable member in the first accommodating space and the touch cover 500
  • the second adhesive member 420 connects between the annular frame-shaped fixing member The side facing away from the touch cover 500 .
  • 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 .
  • FIGS. 5e and 5f 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 .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the pressure sensing element 700 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.
  • 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.
  • 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 .
  • 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 .
  • 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 .
  • 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 .
  • 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.
  • 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.
  • 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 ).
  • 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.
  • the overall structure is also more stable.
  • the direction of the output voltage signal of the control member can be adjusted.
  • 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.
  • 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
  • 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
  • the fourth lead 622 is connected to the ground terminal 620 and the positive electrode connection part of the second haptic feedback unit 120 .
  • 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 .
  • the opposite driving voltage signals are output to the two haptic feedback units.
  • the connection lead includes a fifth lead 613 , a sixth lead 614 and a seventh lead 623
  • 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
  • the seventh lead 623 is connected to the positive electrode connecting part of the second haptic feedback unit 120 and the ground terminal 620 .
  • 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 .
  • the opposite driving voltage signals are output to the two haptic feedback units.
  • the touch cover 500 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
  • 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.
  • 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.
  • an embodiment of the present application further provides an electronic device, including the haptic feedback device provided by an embodiment of the present application.
  • the electronic device is a notebook computer, and the haptic feedback device can be arranged at the display screen and 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.
  • the electronic device is a smart phone, and the haptic feedback device is arranged at the display screen of the smart phone.
  • 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).
  • the electronic device is a central control screen of a car
  • the haptic feedback device is arranged at the display screen of the central control screen of the car.
  • 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.
  • the electronic device is a smart watch
  • the haptic feedback device is arranged at the display screen of the smart watch.
  • 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.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

Sont divulgués une unité de rétroaction tactile, un dispositif de rétroaction tactile et un appareil électronique. L'unité de rétroaction tactile comprend un élément piézoélectrique, un premier composant élastique et un second composant élastique, la distance verticale entre une première surface et une seconde surface de l'élément piézoélectrique étant une première distance, et la distance verticale entre une première face latérale et une seconde face latérale de l'élément piézoélectrique est une seconde distance, la première distance étant inférieure à la seconde distance ; le premier composant élastique est relié à la première face latérale, le second composant élastique est relié à la seconde face latérale, un côté du premier composant élastique qui est opposé à la première face latérale est utilisé pour être relié à un élément fixe, et un côté du second composant élastique qui est opposé à la seconde face latérale est utilisé pour être relié à un élément mobile ; et l'élément piézoélectrique se déforme après la réception d'un signal de tension d'entraînement, et entraîne la déformation élastique du premier composant élastique et du second composant élastique, de telle sorte que l'élément mobile se déplace par rapport à l'élément fixe. Le premier composant élastique et le second composant élastique sont conçus pour servir de support, la déformation de l'élément piézoélectrique est dirigée vers l'élément mobile, une légère déformation de l'élément piézoélectrique pouvant être amplifiée, de telle sorte que l'effet de rétroaction tactile est bon.
PCT/CN2020/101308 2020-07-10 2020-07-10 Unité de rétroaction tactile, dispositif de rétroaction tactile et appareil électronique WO2022006844A1 (fr)

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