Device for generating haptic feedback

Abstract

The invention relates to a device for generating haptic feedback, having two components which can be moved relative to one another and a mountable actuator component (1) which is fixed between the two components (20, 30), wherein the actuator component (1) comprises a piezoelectric actuator (2) which is mechanically coupled to the two components, a mechanical amplification element (3), wherein the mechanical amplification element (3) is fastened at the piezoelectric actuator (2), and an interface element (4).

Description

Technical Field

[0001] This invention relates to a device and a method for generating tactile feedback. Background Technology

[0002] A piezoelectric actuator is disposed between two rigid elements, wherein the actuator changes its elongation in a first direction when a voltage is applied, and the rigid elements are deformed by the elongation of the actuator such that the working surface moves relative to the elements in a second direction substantially perpendicular to or parallel to the first direction, as described, for example, in document WO 2018 046 201 A1.

[0003] In such applications, functionality and performance depend primarily on the assembly of these actuators. In particular, the large tolerances of piezoelectric actuators and rigid components present a challenge. Furthermore, not only can high performance fluctuations occur during assembly, but damage to the actuators can also result.

[0004] In typical applications, such powerful actuators are used to drive tactile displays, for example, in the automotive industry or in industrial applications. Here, fairly heavy equipment is often involved. Therefore, tactile sensation is typically generated through the relative acceleration of the lightweight display relative to its heavy base module, with the tactile element positioned between the two. Thus, good mechanical fastening, coupling, and durability between the display, the tactile element, and the base module are crucial for functionality. Furthermore, ease of manufacture is a significant advantage.

[0005] A simple relative orientation and basic working principle of a corresponding device are also shown in document WO 2019 193 006A1, including basic fastening by a fastening mechanism not described in detail.

[0006] A more detailed example of such a system can also be found in document DE 2020 20 100 265 U1, which shows the threaded fastening between the display, haptic element and base. Summary of the Invention

[0007] One object of this invention is to improve upon the prior art.

[0008] The present invention relates to a device for generating tactile feedback.

[0009] The present invention particularly relates to a device for generating tactile feedback, the device having a piezoelectric actuator and an interface element.

[0010] The interface element is preferably rigid.

[0011] Components that are fastened to each other are preferably fastened to each other by a fixing mechanism such as screws or adhesives. The interface components themselves are preferably not fastened by such a fixing mechanism.

[0012] In one embodiment, the device includes a mechanical amplification element, which is mounted on a piezoelectric actuator.

[0013] In one embodiment, the device includes two components that are movable relative to each other, wherein an actuator or an actuator component including an actuator and a mechanical amplification element is fixed between the two components.

[0014] In one implementation, the actuator component is mechanically coupled to the two components.

[0015] The described features and components can be designed and combined as described in the embodiments below.

[0016] The present invention is further characterized by the claims.

[0017] The dependent claims describe embodiments of the invention.

[0018] The device has two components that are movable relative to each other. Preferably, one component is rigid while the other component is movable relative to the rigid component. The device may include additional components besides these two.

[0019] The device also includes a mountable actuator component fixed between the two components. Preferably, the actuator component generates tactile feedback by inducing mechanical motion due to an electrical signal via a piezoelectric actuator. The actuator component is preferably designed such that the motion is subsequently amplified and transmitted to the movable component, causing the movable component to move relative to the rigid component and provide tactile feedback.

[0020] Preferably, the actuator component is fastened not only to the rigid component but also to the movable component between the two components.

[0021] The actuator component according to the invention includes a piezoelectric actuator, which is preferably indirectly mechanically coupled to the two components; a mechanical amplification element, wherein the mechanical amplification element is fixed to the piezoelectric actuator; and an interface element, by means of which the mechanical amplification element is preferably mechanically connected to one of the components, wherein the interface element is preferably fixed to the amplification element and the component.

[0022] Components that are fastened or fixed to each other (“fixed” and “fastened” have the same meaning here) are preferably fastened to each other by a fastening mechanism such as screws or adhesives. The interface component itself is preferably not such a fastening mechanism.

[0023] The piezoelectric actuator is preferably implemented as an approximately cuboid element, which preferably includes electrodes and a piezoelectric active layer, such as a ceramic layer. The actuator can be manufactured using a multilayer technique. The actuator has external electrical contacts. When a voltage is applied during operation, the actuator primarily contracts or extends in the x-direction.

[0024] Contact is preferably made through the electrodes of the actuator, especially through external electrodes exposed to the outside at the actuator.

[0025] In addition, the actuator may also include internal electrodes disposed between ceramic layers and electrically contacted outward by external electrodes.

[0026] In implementation, the electrical wiring of the actuator, especially the external electrodes of the actuator, is made via cables or via a so-called flexible printed circuit board (FPC).

[0027] The electrical wiring is further explained below with reference to the accompanying drawings.

[0028] The mechanical amplification element is preferably configured and arranged such that it is shaped by the elongation of the piezoelectric actuator in the first direction x, such that the central portion region of the mechanical amplification element—or the contact region—moves relative to the piezoelectric actuator in a second direction y perpendicular to the first direction x, thereby applying a force in the y direction.

[0029] Preferably, the amplifying element includes a side region that abuts against and is secured to the y-direction side of the actuator.

[0030] Preferably, the two side regions of the amplifying element are abutted against the two ends of the actuator on the y-direction side. A central region of the amplifying element is preferably formed therebetween, connected to the two side regions, for example, via two hinges and a transition region located therebetween. The central region is preferably planar and parallel to the y-direction side of the actuator.

[0031] If the two side regions are pushed together or pushed apart by the actuator in the x-direction by elongation or compression, the central region preferably moves away from the actuator (pushed together) or toward the actuator (pushed apart) in the y-direction.

[0032] Therefore, the force in the y-direction is preferably applied from the amplifying element to one of the components via the interface element.

[0033] An amplifying element can also be mounted on the second side of the actuator opposite to the side pointing in the y-direction, thus doubling the amplification effect. The second amplifying element can also be coupled to the second component via a second interface element. However, one of the amplifying elements can also be directly coupled to one of the components without an additional interface element, for example, via a direct threaded connection.

[0034] The interface element is preferably implemented to provide mating tolerances or tolerance compensation in at least one spatial direction when fixed to the component during the installation of the actuator component. This simplifies the installation and manufacture of the actuator component and the entire device.

[0035] According to one embodiment of the invention, the interface element is a planar molded part, which preferably extends planarly in the xy plane, and the molded part preferably comprises a material that is as flexible as possible, and the material is also as rigid as possible.

[0036] For example, interface elements may include metals such as aluminum or stainless steel. Alternatively, especially if an electrically insulating material is desired, the interface element may include plastic. The plastic may preferably be fiber-reinforced. For example, the plastic may be nylon reinforced with glass fiber. This material is also used for electromagnetic shielding, electrical insulation, or electrical decoupling. Furthermore, the material may also be used to form thermal and / or acoustic insulation / shielding / decoupling. This also avoids the formation of localized batteries between the interface element and adjacent components.

[0037] Molded parts are, for example, milled, printed, or cut and bent from sheet metal.

[0038] According to one embodiment of the invention, the interface element is flexible in a third direction z perpendicular to the first direction x and the second direction y, thereby providing mating tolerance or tolerance compensation in at least the third direction z when fixed.

[0039] Preferably, the interface element has sufficiently high flexibility and bendability, allowing it to be bent in the z-direction to enable the actuator component to be mounted into the device. Preferably, bending in the z-direction by at least 0.5 mm is feasible.

[0040] According to one embodiment of the invention, the interface element has a groove that facilitates bending of the interface element. The remaining interface elements can then be implemented in a manner thicker than at the location of the groove to achieve sufficiently high rigidity. The bending length, and thus the maximum bending in the z-direction, depends on the distance between the groove and the amplifying element.

[0041] According to one embodiment of the invention, the interface element is a flexible, bendable plate. Therefore, a groove is not strictly necessary. However, the material should still possess sufficient rigidity. For example, a thin stainless steel plate can be used. The thickness of such a stainless steel plate is preferably between 0.3 mm and 1 mm, more preferably between 0.5 mm and 0.6 mm.

[0042] According to one embodiment of the invention, the interface element is fixed to the component by means of at least one screw, wherein the interface element has an elongated hole for receiving the screw, wherein the elongated hole provides a fit tolerance or tolerance compensation in at least a first direction x or a second direction y, or in both directions x and y, when fixed.

[0043] Preferably, to ensure symmetrical force transmission, at least two symmetrically arranged elongated holes and screws are provided. The elongated holes have a larger dimension than the screws, allowing the screws to be placed within the elongated holes with tolerances. This larger dimension can extend only in the x-direction, only in the y-direction, or in both directions.

[0044] According to one embodiment of the present invention, the interface element has a fastening region that is planarly attached to and fastened to a contact region of a mechanical amplification element. The main region of the interface element is planarly formed in the xy-plane, while the fastening region, like the contact region, is planarly formed in the xz-plane. The fastening region is preferably correspondingly bent or milled.

[0045] According to one embodiment of the invention, the fastening region and the abutment region are bonded together. If the fastening region and the abutment region are bonded together, stiffness is increased and force transmission is improved. To increase stiffness, a large adhesive contact surface and a thin adhesive layer are desirable; to increase flexibility, a thicker, more flexible adhesive layer may be advantageous.

[0046] According to one embodiment of the invention, the fastening region is curved around the abutment region, for example, in a U-shape, to provide a large contact surface, such as an adhesive contact surface.

[0047] According to one embodiment of the present invention, the fastening region and the abutment region are fastened by at least one of threaded connection, riveting, clamping, and insertion. The combination of multiple fastening methods improves the strength and rigidity of the connection, thereby enhancing service life, stability, and the quality of force transmission.

[0048] According to one embodiment of the invention, the interface element and the mechanical amplification element are implemented as a single piece, i.e., as a single component. This reduces the cost during assembly and improves force transmission.

[0049] According to one embodiment of the invention, the mechanical amplification element is implemented perpendicular to the region where the interface element is bent. Therefore, the amplification element corresponds to the fastening region in the two-piece embodiment. The bending in the interface element increases the rigidity of the component.

[0050] According to one embodiment of the invention, the mechanical amplification element has curved edges on one or more sides, which reinforce the amplification element. In particular, in addition to the curvature towards the interface element, additional curvatures may be provided at other edges solely for increasing rigidity.

[0051] According to one embodiment of the invention, the actuator component includes a spring portion that functions as a spring.

[0052] The spring portion is designed such that by compressing the spring portion, the actuator component can be positioned between the two components in at least the second direction y with tolerance, and such that the spring portion preloads the piezoelectric actuator to a desired degree after positioning the actuator component between the two components and before fixing.

[0053] Therefore, on the one hand, the tolerance when installing the actuator components is improved, because the actuator components do not need to have precisely the dimensions of the predetermined clearance or intermediate space between the two components in the device, but can be implemented to be slightly larger, such that the spring portion is compressed.

[0054] On the other hand, the spring stiffness of the spring portion can be preferably selected such that the actuator is automatically preloaded to the desired degree during installation. Preferably, a stiffness of up to 10 N / mm is selected, such that a preload force of preferably 3 N / mm up to a maximum of 10 N / mm is set.

[0055] According to one embodiment of the invention, the spring portion is designed such that the actuator component is fixed in its position by the spring portion after being positioned between the two components and before being fixed.

[0056] In particular, the actuator components are secured by an applied preload, preventing movement during the fixing process, for example, by means of screws or adhesive. This simplifies installation. After fixing, preload via the spring portion is no longer required, and the fixing part then transmits force to the fixed component.

[0057] According to one embodiment of the invention, the spring portion is designed such that by compressing the spring portion, the actuator component can be positioned between two components with a mating tolerance at least in the y-direction, and such that after the actuator component is positioned between the two components and before being fixed, the spring portion preloads the piezoelectric actuator to a desired degree. Alternatively, the spring portion may also provide mating tolerances in the x-direction or in both the x and y-directions.

[0058] According to one embodiment of the invention, the spring portion is integrally formed with the interface element as part of the interface element. For example, the spring structure is cut or milled into the end of the interface element that rests on the component but not on the amplifying element.

[0059] According to one embodiment of the invention, the spring portion is a component independent of the interface element, which is disposed between the interface element and the component. This spring portion can be used flexibly and, if desired, can be removed and reused after the actuator component has been installed in the device.

[0060] According to one embodiment of the present invention, two symmetrically arranged spring portions are provided or configured at the interface element of the actuator component to ensure symmetrical and uniform force transmission.

[0061] According to one embodiment of the invention, the interface element has a clearance for reducing material consumption. For example, the surface between the fastening area, the elongated hole, and the optional spring portion can be largely left open to reduce material consumption.

[0062] According to one embodiment of the invention, the interface element is supported planarly on the component. The large contact surface improves stiffness and force transmission, but reduces the flexibility and bendability of the interface element.

[0063] According to one embodiment of the invention, the interface element is fixed to the component by means of adhesive bonding or by means of threaded connection.

[0064] According to one embodiment of the invention, the interface element has a structure with regularly arranged honeycomb-shaped gaps to facilitate bonding. The honeycomb structure increases the available contact surface for bonding and facilitates curing of the adhesive by UV light irradiation.

[0065] According to one embodiment of the present invention, the interface element has a centering auxiliary mechanism, which is configured to facilitate precise positioning of the interface element on the component or to pre-set a precise position in at least one spatial direction.

[0066] In particular, the centering aid should preferably facilitate positioning onto the surface of a component that matches the surface shape of the interface element in terms of surface size. Therefore, the centering aid can help to stack the surfaces one on top of the other as close to each other as possible.

[0067] In particular, when the surfaces have approximately the same elongation in the x direction, the centering aid can be a curved edge or strip along the y direction or other limits of the interface element in the x direction.

[0068] According to one embodiment of the present invention, the centering auxiliary mechanism is a curved edge, which is used for the precise positioning of a preset interface element at least in a first direction x.

[0069] According to one embodiment of the invention, the curved edge is configured such that the curved edge allows for tolerance fitting when positioning interface elements, i.e., bending outwards, for example.

[0070] According to one embodiment of the present invention, the interface element and the mechanical amplification element are made of the same material.

[0071] According to one embodiment of the present invention, the interface element made of an electrically insulating material also has electromagnetic shielding properties.

[0072] According to one embodiment of the present invention, the mechanical amplification element or the interface element implemented in one piece with the mechanical amplification element has a damping portion for attenuating the movement of the mechanical amplification element toward the piezoelectric actuator.

[0073] According to one embodiment of the present invention, the vibration damping portion is preferably implemented as a mechanical spring, which is positioned between the mechanical amplification element and the piezoelectric actuator.

[0074] The damping portion is preferably formed as a single piece of the interface element and can exist, for example, in the flexible bending of the plate or in a more complex spring structure. The interface element can also bend around the damping element in particular.

[0075] One objective of the damping element is preferably to limit the travel between the actuator and the amplifying element, and more preferably, to distribute the force evenly on the actuator and reduce the stress at the fastening point between the amplifying element and the actuator, even under large forces, such as due to improper load.

[0076] The damping element preferably also prevents the amplification element from directly impacting the actuator, for example, during improper operation of the device. Preventing impact itself is not necessarily the goal. However, targeted impact should at least be possible within a predefined force / stroke range—a range that prevents damage or permanent deformation of the actuator or amplification element.

[0077] According to one embodiment of the present invention, a motion sensor, force sensor or pressure sensor for measuring the deflection of a mechanical amplification element is positioned between the mechanical amplification element and the piezoelectric actuator.

[0078] According to one embodiment of the present invention, the sensor is a capacitive sensor, which includes a first conductor and a second conductor, wherein the first conductor is part of a mechanical amplification element and the second conductor is part of a piezoelectric actuator.

[0079] This simple implementation can be integrated without additional equipment costs.

[0080] According to one embodiment of the present invention, the component has a positioning aid, which is adapted to fix the position of the interface element on the component, preferably with a clearance tolerance.

[0081] According to one embodiment of the invention, the positioning aid is adapted to fix the interface element in its position after positioning and before fixing, i.e., during the assembly of the device.

[0082] According to one embodiment of the present invention, the positioning aid is preferably implemented as a pin or dowel, and the interface element has a matching recess into which the positioning aid can be inserted.

[0083] According to one embodiment of the invention, the positioning aid is particularly suitable for fixing the positions of the two components, namely the rigid component and the movable component, relative to each other, and preferably additionally restricting the stroke of the components relative to each other and relative to the actuator, so as to protect the actuator from excessive external forces.

[0084] Therefore, the positioning aid can be used simultaneously as a stroke limiting element and a stop element for the aforementioned components and actuators together with the amplification elements.

[0085] According to one embodiment of the present invention, the actuator component further includes a second mechanical amplification element, which is fastened to the piezoelectric actuator, wherein the piezoelectric actuator is disposed between the first mechanical amplification element and the second mechanical amplification element.

[0086] According to this embodiment, the actuator component also has a second interface element by means of which the second mechanical amplification element is mechanically connected to a corresponding component different from the first interface element, in such a way that the second interface element is fixed on the second amplification element and the component, wherein the second interface element is configured to provide a fit tolerance in at least one spatial direction when fixed on the component during actuator component installation, and wherein the second mechanical amplification element is configured and arranged to be shaped due to the elongation of the piezoelectric actuator in the first direction, such that the contact area of ​​the second mechanical amplification element moves relative to the piezoelectric actuator in the second direction, thereby applying force to the component via the second interface element.

[0087] In other words, the actuator component may have two amplifying elements and two interface elements according to the foregoing embodiment. These two amplifying elements and interface elements may be implemented identically or differently. One of the interface elements establishes a connection with the rigid component, and the other interface element establishes a connection with the movable component.

[0088] All of the aforementioned implementation methods can be combined arbitrarily.

[0089] The present invention also relates to a method for assembling a device according to any of the foregoing embodiments, wherein an actuator component is positioned between two components that are movable relative to each other, and is fixed between the two components according to the interface element.

[0090] A separate spring portion, not integrally formed with the interface element, can be used as an auxiliary mechanism during the positioning process of the actuator component between the two components, and is removed after the actuator component is fixed. Attached Figure Description

[0091] The present invention will now be described with reference to the accompanying drawings. The invention is not limited to the embodiments shown in the drawings. The exact features shown in different drawings can be combined arbitrarily and appropriately, and are not limited to the combinations shown in the drawings. Dimensions and proportions need not be presented to scale.

[0092] The attached diagram shows:

[0093] Figure 1 The first embodiment of the actuator component is shown in the left perspective view and the right sectional view.

[0094] Figure 2 Different embodiments with elongated holes are shown.

[0095] Figure 3 Another embodiment of the actuator component is shown in a perspective view.

[0096] Figure 4 The embodiment with rivets is shown in perspective and sectional view.

[0097] Figure 5 The embodiment with clamping is shown in perspective and sectional view.

[0098] Figure 6 An embodiment with an adhesive plate is shown in perspective and sectional view.

[0099] Figure 7 An embodiment with a one-piece magnifying element and interface element is shown in perspective and sectional view.

[0100] Figure 8The embodiments with one-piece magnifying elements and interface elements, as well as additional curved edges, are shown in perspective and sectional views.

[0101] Figure 9 Five different implementations with spring portions are shown.

[0102] Figure 10 An embodiment with a separate spring section is shown.

[0103] Figure 11 This shows the installation of the actuator components in the device.

[0104] Figure 12 The illustration shows the installation of actuator components in a device using a positioning aid. For example, a cylindrical pin is shown as the positioning aid.

[0105] Positioning aids are also used to limit the travel between movable and rigid components. The travel is particularly preferably limited to the range of 0.25 mm to 0.5 mm.

[0106] Figure 13 The image shows the installation of actuator components in the device with the aid of a centering auxiliary mechanism, and the actuator components having the centering auxiliary mechanism.

[0107] Figure 14 The actuator component with damping section is shown in cross-sectional view. The additional function of the damping section shown is to limit the travel of the amplifying element and to uniformly distribute forces arising from improper loads, such as strong supports on moving parts, such as the display. Forces up to 500 N can thus be attenuated and distributed during operation.

[0108] Figure 15 A one-piece implementation is shown, in which an interface element, an amplifying element, a spring portion, and a damping portion are combined.

[0109] Figure 16 Another one-piece implementation is shown.

[0110] Figure 17 Another one-piece implementation is shown.

[0111] Figure 18 Another one-piece implementation is shown.

[0112] Figure 19 Another one-piece implementation is shown in different perspective views.

[0113] Figure 20 and Figure 21 This illustrates an embodiment of the electrical contacts of a piezoelectric actuator, particularly via an FPC ( Figure 20 ) or cable ( Figure 21Electrical contact.

[0114] Figure 22 and Figure 23 An embodiment is shown with an additional reinforced connecting element at the transition between the amplification element and the interface element.

[0115] Figure 24 and Figure 25 This illustrates an embodiment in which the amplification element and the interface element are joined by material fitting, such as bonding or welding. Figure 25 Shown from Figure 24 A half-sectional view of the implementation method. Detailed Implementation

[0116] exist Figure 1 The first embodiment of the actuator component 1 according to the present invention shown in the figure includes a piezoelectric actuator 2 and two mechanical amplification elements 3 applied to opposite surfaces of the piezoelectric actuator 2.

[0117] Actuator component 1 is intended to be mounted between two components of the device, one of which is rigid and the other is movable. Actuator component 1 is particularly capable of causing movement of the movable component relative to the rigid component.

[0118] For this purpose, actuator component 1 is fastened between the rigid component and the movable component, wherein there is a mechanical fastening at both components. To facilitate installation, as shown in the example, it is helpful if installation can be performed with mating tolerances.

[0119] The side regions 3A of the mechanical amplification element 3 are fastened to the piezoelectric actuator 2, for example, by adhesive bonding. The central region 3B of the mechanical amplification element 3 is connected to the side regions 3A of the amplification element 3 via a hinge.

[0120] The mechanical amplification element 3 is configured such that if the piezoelectric actuator 2 contracts in the first direction x due to voltage and the two side regions 3A move toward each other in the direction x, then the portion of region 3 moves away from the piezoelectric actuator 2 in the second direction y perpendicular to the direction x.

[0121] The piezoelectric actuator 2 includes or is made of a piezoelectric active material such as ceramic.

[0122] The mechanical amplification element 3 is implemented as an arc-shaped component, that is, the mechanical amplification element has an arc-shaped component shape, the arc-shaped component shape includes a side region 3A and a central region 3B.

[0123] The mechanical amplifying element 3 may include, for example, a metal with high rigidity. Alternatively, the amplifying element 3 may also include or be composed of electrically insulating and / or electromagnetically shielding materials. For example, plastics, particularly fiber-reinforced plastics such as glass fiber reinforced nylon, are provided as such materials.

[0124] An interface element 4 is disposed at the amplifying element 3. In this embodiment, the interface element 4 is, for example, a molded part milled from an aluminum block. The molded part is substantially plate-shaped. The molded part, implemented as a plate, is thick enough that the interface element 4 has the required rigidity to transmit force from the amplifying element 3 to other components of the device according to the invention.

[0125] The actuator component is fastened to the rest of the equipment via interface element 4.

[0126] Force transmission from amplifying element 3 to other components of the device according to the invention is carried out via interface element 4, wherein preferably one component is rigid and the other component is movable relative to the rigid component.

[0127] Therefore, the interface element 4 is fastened to the amplification element 3 on the one hand and to other components on the other hand, such as to rigid components and / or movable components.

[0128] One of the interface elements 4 is fastened to a rigid component. Another interface element 4 is fastened to a movable component. Alternatively, only one amplifying element 3 can be connected to another component via the interface element 4. Another amplifying element 3 can also be directly connected to another component, for example.

[0129] Interface element 4 is threaded to, for example, another component. For this purpose, in the example, interface element 4 has a specific number, for example, two, elongated holes 5. The elongated holes 5 provide a fit tolerance in the second direction y during threaded connection. Alternatively, the elongated holes may be implemented differently, such that they provide a fit tolerance, for example, in the first direction x or in both directions x and y, as... Figure 2 As shown in another illustration. Therefore, different elongated holes can, for example, point in different directions or have a cross shape.

[0130] Alternatively, the interface element 4 can also be bonded to other components. For this purpose, the interface element 4 preferably has honeycomb-shaped openings, which increase the usable bonding surface and allow the adhesive to be cured by UV irradiation, for example, in… Figure 3 As shown in the image.

[0131] In this example, the interface element 4 is bonded to the movable portion 3B of the amplifying element 3. For this purpose, the fastening region 4A of the interface element 4, which is fastened to the central portion 3A, has a U-shape. Due to the U-shape, the fastening region 4A can be attached to the central portion 3B from three sides.

[0132] The interface element 4 is substantially planar in the x and y directions, while the contact area and fastening area 4A of the amplification element 3 are substantially planar in the x direction and the z direction perpendicular to the x and y directions. The piezoelectric actuator 2 is also planar along the x and z directions and performs movement in the x direction.

[0133] Therefore, the partial area 3B corresponds to the mating area. The partial area 3B, also known as the mating area 3B, is therefore additionally reinforced, which further improves the force transmission from the amplifying element 3 to the interface element 4.

[0134] Instead of the U-shape, the interface element 4 can also have other suitable shapes in the fastening area 4A.

[0135] Alternatively to adhesive bonding, fastening region 4A can also be fastened to abutment region 3B in other ways. For example, fastening region 4A can be riveted to abutment region 3B, such as... Figure 4 As shown, the fastening region 4A has rivets, or the abutment region 3B is clamped between locking elements of the fastening region 4A, such as... Figure 5 As shown, the fastening region 4A has a C-shaped shape.

[0136] Alternate or additional land may also exist in the same way. Figure 5 The plug-in connection shown is used to additionally secure the components to each other, wherein the fastening area 4A has a pin or bolt.

[0137] The interface element 4 preferably has bendability or flexibility in a third direction z perpendicular to the first direction x and the second direction y.

[0138] Interface element 4 in the example is a planar element, where the surface extends in the x and y directions.

[0139] Bending in the z-direction can be achieved, for example, by a groove extending in the y-direction in the molded part. The groove is indicated by reference numeral 6 in the accompanying drawings.

[0140] Alternatively, molded parts can also be like Figure 6The embodiment shown is a thin plate with sufficiently high rigidity and simultaneously sufficiently high flexibility in the z-direction. Due to this flexibility in the z-direction, the interface element 4 can achieve fit tolerances in the z-direction when the actuator component 1 is mounted into a device with other components. This flexibility in the z-direction particularly enables tolerance compensation in this direction, preferably up to 0.5 mm. For example, when the movable component and the rigid component have different heights in the z-direction, for example, due to manufacturing tolerances. For this purpose, the plate preferably has a thickness between 0.4 mm and 0.7 mm. The plate is, for example, made of stainless steel.

[0141] Typically, manufacturing can be simplified and operational safety can be improved by making amplifying element 3 and interface element 4 from the same material. This, for example, avoids the presence of localized cells (galvanic cells) between these two elements.

[0142] Interface components can also be made of any other suitable material. Materials made of aluminum improve flexibility, while materials made of stainless steel improve rigidity. For example, fiber-reinforced plastic materials, such as glass fiber, like nylon, provide electrical insulation and electromagnetic shielding with sufficient flexibility and rigidity.

[0143] exist Figure 7 In the embodiments shown, the amplifying element 3 and the interface element 4 can be implemented as a single piece. For example, the board described for the interface element 4 in the foregoing embodiments can be correspondingly bent so that it can be used not only as the interface element 4 in the xy plane but also as the amplifying element 3 in the xz plane.

[0144] Basically, the fastening region 4A of the aforementioned embodiment directly becomes the central portion region 3B of the amplifying element 3. Furthermore, the side region 3A for fastening to the piezoelectric actuator 2 is also formed in the plate.

[0145] The bend 3C between the area of ​​the board used as interface element 4 and the area of ​​the board used as amplification element 3 provides the required stiffness. Furthermore, the second edge of the portion 3B opposite the bend edge 3C in the y-direction can also be bent to further improve stiffness and form another bend edge 3D, such as... Figure 8 As shown in the image.

[0146] To simplify the installation of actuator component 1 into the device, actuator component 1 may also have a spring portion 7 serving as a spring. The spring portion 7 may be implemented as part of interface element 4.

[0147] In particular, the corresponding spring structure can be milled into the material of the interface element 4, or cut out from the plate of the interface element 4, for example by laser cutting.

[0148] The spring portion 7 can be produced, in particular, by cutting a corresponding empty portion into the interface element 4. Different implementations are available in... Figure 9 As shown in the diagram. In particular, the symmetrical design of this spring section is helpful in ensuring symmetrical force transmission.

[0149] When inserted into the predetermined clearance of the device, especially into the intermediate space between the two components of the device, the spring portion 7 can achieve tolerance when positioning the actuator component 1. Therefore, the clearance does not need to have the exact size of the actuator component 1, but can be, for example, sized smaller so that the spring portion 7 is correspondingly compressed.

[0150] Furthermore, the spring portion 7 also functions as a preload element, which preloads the actuator component 1, and especially the piezoelectric actuator 2, with the desired preload force when installed into the device or a gap between two components. In the illustrated embodiment, the desired preload force is between 3 and 10 Newtons per millimeter (N / mm). To ensure this, the spring portion 7 preferably has a spring stiffness of up to 10 N / mm.

[0151] In the following Figure 10 An alternative embodiment is shown in which the spring portion 7 is not implemented as a portion of the interface element 4, but is implemented as a separate component, i.e., as a helical spring 7 in the example shown.

[0152] The advantage of an independent embodiment of the spring part 7 is that, after assembly, the spring part 7 can be removed again and reused in the next assembly process once the interface element 4 is connected to the component, for example by adhesive or threaded connection.

[0153] The advantage of the one-piece spring part 7 together with the interface element 4 is (in other words, the spring part 7 and the interface element are made as a single piece) that fewer components are needed when assembling the device and assembly becomes simpler.

[0154] The spring portion 7 is not primarily used for force transmission during the operation of the device, but is preferably used only for fixing the position and setting the preload during the assembly of the actuator component 1. Once the actuator component 1 is fixed to the components of the device via the interface element 4, such as by adhesive or threaded connection, force transmission is preferably carried out via the fixed portion, i.e., via screws or via adhesive layers.

[0155] In the example shown, the spring portion 7 is only provided between the rigid component and the corresponding interface element 4. No spring portion 7 is provided between the other interface element and the movable component.

[0156] In other embodiments, corresponding interface elements 4 and spring portions 7 may be provided on both sides between the two components.

[0157] Figure 11 The actuator component 1 is shown in different views as it is inserted between the movable component 30 and the rigid component 20.

[0158] The first interface element 34 is supported on the surface of the movable component 30, and the second interface element 24 is supported on the surface of the rigid component 20. The two interface elements 24 and 34 are respectively connected to and fixed to the corresponding components 20 and 30 by screws.

[0159] The movable component 30 is movable relative to the rigid component 20. For example, the movable component 30 is movable, for example, elastically supported on the rigid component 20. The movable component 30 is, for example, a screen, and the rigid component 20 is the housing of a computer, tablet, or screen with haptic feedback.

[0160] Figure 12 Another embodiment is shown in which components 20 and 30 have positioning aids 8 that allow actuator component 21 to be easily interlocked and positioned on both components 30 and 20. Positioning aids 8 can further be used simultaneously to secure the interlocking positioning and / or movement / stroke limitation of both the movable and rigid components 20 and 30. Positioning aid 11 is in particular a pin 11 or dowel pin 11, which is guided through a predetermined recess or hole in the interface element 4.

[0161] exist Figure 13 The following embodiment is shown, in which the interface element 4 has an additional centering aid 9, such that the interface element 4 can be positioned as straight as possible in the desired position on the predetermined surfaces of the components 20 and 30.

[0162] The centering auxiliary mechanism 9 is, for example, an additional curved edge or strip along the y-direction edge of the interface element 4, which fixes the position of the interface element 4 on the component surface of the rigid member 20 or the movable member 30.

[0163] The centering auxiliary mechanism 9 is preferably configured such that it does not unnecessarily restrict the degrees of freedom during equipment assembly. For example, the centering auxiliary mechanism 9 is configured with a curved edge, however, the bending angle is preferably not 90° (° represents degrees), but for example, 135°, so that a certain gap is allowed when positioning / fixing the actuator component 1 and, in particular, the interface element 2, while ensuring that the interface element 2 is centered at least in the x-direction.

[0164] The centering auxiliary mechanism 9 is preferably directly configured as a part of the interface element 4.

[0165] When the surface regions 31 and 21 of components 20 and 30 are sized such that they have the same dimensions in the x-direction as interface element 4, taking into account conventional tolerances, the centering auxiliary mechanism 9 is particularly advantageous.

[0166] In each of the embodiments, a force sensor or pressure sensor may be further positioned between the piezoelectric actuator 2 and the mechanical amplification element 3.

[0167] For example, the amplifying element 3 and the actuator 2 may each include a conductive layer, with a capacitor element formed between the conductive layers, so that the pressure or movement of the mechanical amplifying element 3 toward the piezoelectric actuator 2 can be detected by the change in capacitance between the conductive layers.

[0168] Furthermore, the interface element 4 or the amplification element 3, or the amplification element 3 implemented as a single piece together with the interface element 4, may include a damping section 11 that attenuates the movement of the amplification element 3 toward the piezoelectric actuator 2, especially undesirable violent movement. Therefore, damage or wear to the piezoelectric actuator 2, for example, caused by impacts from the mechanical amplification element 3, can be prevented or avoided.

[0169] The damping portion 11 can be implemented, for example, as an elastic region in the mechanical amplification element 3 or in the interface element 4. The elastic region should preferably have high stiffness so as to limit the stroke between the amplification element 3 and the actuator 2 under high forces.

[0170] Figure 14 This illustrates how the damping portion 11 can be implemented as a portion of the interface element 4. For this purpose, the plate from which the interface element 4 is made is bent around the enlarged member 3 and also has an additional U-shaped bend along the entire width in the x-direction, wherein the U-shaped bend serves as a spring for the damping portion.

[0171] Preferably, the vibration damping part 11 does not directly contact the piezoelectric actuator 2 in order to avoid unnecessary impact on the actuator 2.

[0172] Preferably, the gap between the damping section 11 and the actuator 2 is large enough that contact only occurs when the applied force becomes excessive and exceeds a certain threshold, such as 80 N. In this case, the irreversible force—which is barely tolerable due to the damping section 11—can be, for example, 100 N. Therefore, if the damping section 11 is properly designed—in this case, for an additional load of 20 N—damage to the actuator 2 or the amplifying element 3 up to 100 N can be reliably prevented.

[0173] In, for example, in Figure 15 In another embodiment shown, material consumption is further reduced.

[0174] Specifically, the damping component 11, the interface element 4, and the amplifying element 3 are implemented in a single component. Furthermore, the interface element 4 also retains its elastic function as much as possible or includes a spring portion 7. However, all material between the functional sections of the component can be left unused, such as in… Figure 15 , Figure 16 , Figure 17 As shown in the image.

[0175] Other Figure 18 and Figure 19 Another design of the piezoelectric actuator component 1 according to the invention is shown.

[0176] Preferably, all embodiments are designed such that the force transmission between the piezoelectric actuator 2 and the components 20 and 30 of the device is as high as possible, which can be ensured by centrally attaching the interface element 4 to the amplifying element 3 in the z-direction, by the sufficiently high stiffness of the interface element 4, and by the sufficient width of the interface element 4 in the x-direction.

[0177] At the points of maximum force transmission between elements 3 and 4, particularly at the hinge or the outer edge of a portion 3B or abutment area 3B of mechanical amplification element 3, the interface element 4 preferably covers these areas with its fastening area 4A. Preferably, for this purpose, the fastening area 4A may extend beyond the central portion 3B or abutment area 3B in the x-direction.

[0178] Furthermore, material consumption should be minimized as much as possible, so that as many components as possible are implemented in a single element, and materials should preferably be omitted wherever possible.

[0179] The interface element 4 further allows for greater tolerances when mounting the piezoelectric actuator component 1 into the device between components 20 and 30. This is because the interface element 4 is preferably flexible in the z-direction, and because the fixed position can be moved within a predetermined tolerance range in the x-direction or y-direction, for example, through a correspondingly sized elongated hole.

[0180] Preferably, the elongated hole has a maximum size between 1 mm and 1.5 mm, wherein the maximum diameter of the circular section is up to 4 mm.

[0181] Furthermore, the spring portion 7, which can be implemented as part of the interface element 4, can achieve a standardized preload force for setting the piezoelectric actuator 2 when installed in the device, and further improve the installation tolerances regarding the dimensions of the actuator element 1 and the clearance provided for installation, because the spring portion 7 is compressible. That is, the spring portion 7 can be slightly adjusted in its length.

[0182] The interface element 4 with the integrated spring portion 7 typically has a length in the y-direction between 10 mm and 40 mm. Its width in the x-direction is typically between 5 mm and 20 mm. The spring portion 7 preferably allows for length variations up to 1 mm in the y-direction, or alternatively also in the x-direction.

[0183] exist Figure 20 and Figure 21 An embodiment of the electrical wiring and contacts for the piezoelectric actuator 2 is shown.

[0184] The contacts shown can be combined with each embodiment of the actuator component 1.

[0185] The piezoelectric actuator 2 includes two external electrodes 50 of different polarities for external electrical contact via wiring elements. The external electrodes are shown in different figures. To facilitate external wiring structurally, in this example, the two external electrodes 50 are positioned on the same outer side of the piezoelectric actuator.

[0186] exist Figure 20 The diagram shows a flexible wiring element 40, such as a so-called flexible printed circuit (FPC), which is wired to both connection electrodes 50. For example, the wiring element 40 can be soldered to an external electrode.

[0187] By electrically connecting the piezoelectric actuator 2 to a single outer side of the actuator 2 via the wiring element 40, as shown, a reduction in process steps can be achieved, for example, when fabricating external contacts on the substrate. Typically, in the case of elongated piezoelectric ceramic components, the external electrodes are located at both ends of the substrate. This positioning of the electrical contacts increases costs in mass production and limits the feasibility of electrical connections. Therefore, for example, FPC connections are still very difficult to achieve or simply impossible. By placing the external electrodes 50 side-by-side on a single outer side of the piezoelectric actuator 2, production costs can be essentially halved because both external electrodes 50 can be applied in a single common process step. Furthermore, the piezoelectric actuator 2 can be wired via the wiring element 40 formed by the FPC as described, which reduces the overall space requirement in the system integration of the actuator component 1 and simplifies operation. In particular, this also reduces production costs in mass production because the connection process for wiring the wiring element 40 is performed only on one side of the piezoelectric actuator 2. Furthermore, processes such as reflow soldering, laser soldering, thermocompression soldering, or the use of anisotropic conductive film (ACF) can only be meaningfully used by means of the described geometry.

[0188] Alternative to Figure 20 The FPC in the actuator 2 can also use two cables 41 as wiring elements. The advantage of cables is their greater flexibility in operation. External electrodes on different sides of the actuator 2 can also be easily and flexibly contacted via cables 41.

[0189] Cable 41 includes conductive wires and an electrically insulating sheath, such as an electrically insulating sheath made of plastic.

[0190] For example, cable 41 or the conductive wire of the cable can also be soldered to the external electrode 50, the conductive wire being exposed from the cable insulation in the area of ​​the external electrode.

[0191] exist Figure 22 and Figure 23 An additional embodiment of the actuator component 1 is shown, in which the connection between the mechanical amplification element 3 and the interface element 4 is additionally strengthened by the connecting element 37.

[0192] The connecting element 37 between the mechanical amplification element 3 and the interface element 4, for example, Figure 22 The solder joints or adhesive joints indicated in the document, or as shown in the document. Figure 23 As indicated in the diagram, it is feasible to increase the stiffness of the amplifying element 3 and the interface element 4 and their connection so that mechanical energy can be transferred between and beyond the mentioned elements with only small losses. This advantageously induces amplified tactile feedback.

[0193] The connecting element can be provided in all disclosed embodiments, regardless of the embodiment of amplifying element 3 and interface element 4. In particular, the connecting element 37 can also be provided in a component comprising amplifying element 3 and interface element 4 in a one-piece embodiment, such as from, for example, from Figure 7 As shown in the accompanying figures.

[0194] Figure 24 and Figure 25 Another embodiment is shown in which the amplification element and the interface element are joined by material fitting such as bonding or welding. Figure 25 This is shown Figure 24 A half-sectional view of the implementation method in the example.

[0195] In particular, the elements present here as two parts, amplification element 3 and interface element 4, can be connected by a pure material fit instead of the shape fit or force fit shown in the aforementioned embodiments.

[0196] Therefore, the interface element 4 is preferably placed centrally and vertically on the outward-pointing surface of the amplifying element 3 and connected to the amplifying element material in a manner that is, for example, by bonding or welding.

[0197] In particular, such as Figure 24 As shown, adhesive or solder joints 37 can be provided for material mating connections, as they are shown earlier in the diagram. Figure 22 and Figure 23 As described in the section on connecting element 37, alternatively, or in combination with solder joints or adhesive joints, weld seams or adhesive joints may also be provided. Therefore, additional form-fit or force-fit connections between the amplifying element 3 and the interface element 4 are not necessary.

[0198] Figure Labels

[0199] 1. Piezoelectric actuator components

[0200] 2. Piezoelectric actuator

[0201] 3 Mechanical Amplification Components

[0202] 3A side area

[0203] 3B Central area, adjacent area

[0204] 3C, 3D curved edges

[0205] 4 Interface Components

[0206] 4A Fastening Area

[0207] 5 elongated holes

[0208] 6 slots

[0209] 7. Spring section

[0210] 8. Positioning Auxiliary Components

[0211] 9. Central Auxiliary Institutions

[0212] 11 Vibration Damping Section

[0213] 20 Rigid components

[0214] 21 Surface area of ​​rigid components

[0215] 24 Interface elements in rigid components

[0216] 30. Movable parts

[0217] 31 Surface area of ​​movable parts

[0218] 34 Interface elements in movable parts

[0219] 37 Connecting elements

[0220] 40 Flexible wiring elements

[0221] 41 Cable

[0222] 50 External Electrode

Claims

1. A device for generating haptic feedback, the device comprising: Two components (20, 30) that are movable relative to each other. and an actuator component (1) that can be installed, the actuator component being fixed between the two components, wherein the actuator component (1) comprises: A piezoelectric actuator (2) is mechanically coupled to the two components (20, 30). Mechanical amplification element (3), wherein the mechanical amplification element is fastened to the piezoelectric actuator (2), And interface components (4).

2. The device according to claim 1, wherein the mechanical amplification element (3) is mechanically connected to one of the components by means of the interface element (4).

3. The device according to claim 2, wherein the interface element (4) is fixed to the amplifying element (3) and the component, wherein the interface element (4) is fixed to the amplifying element (3) by means of material fit, shape fit and / or force fit, or the interface element (4) and the amplifying element (3) are implemented as a single piece.

4. The device according to any one of claims 2 or 3, wherein the interface element (4) is configured to provide a mating tolerance in at least one spatial direction when fixed at the component during installation of the actuator component (1).

5. The device according to any one of claims 1 to 4, wherein the mechanical amplification element (3) is configured and arranged to be deformed by the elongation of the piezoelectric actuator (2) in the first direction x, such that the contact area (3B) of the mechanical amplification element (3) moves relative to the piezoelectric actuator (2) in a second direction y perpendicular to the first direction x.

6. The device according to claim 5, wherein force is applied to the component via the interface element (4) by means of movement of the contact area (3B) in the second direction y.

7. The device according to any one of claims 1 to 6, wherein the interface element (4) is a planar molded part, the molded part preferably comprising metal or fiber-reinforced plastic.

8. The device according to any one of claims 5 or 6, wherein the interface element (4) is capable of bending along a third direction z perpendicular to the first direction x and the second direction y, thereby providing at least a fit tolerance or tolerance compensation along the third direction z when fixed.

9. The device according to claim 8, wherein the interface element (4) has a groove (5) that facilitates bending of the interface element (4).

10. The device according to claim 8 or 9, wherein the interface element (4) is a flexible plate.

11. The device according to any one of claims 1 to 10, wherein the interface element (4) is fixed to the component by means of at least one screw, wherein the interface element (4) has an elongated hole (5) for receiving the screw, wherein the elongated hole (5) provides a mating tolerance in at least the first direction x or the second direction y, or in both directions x and y, when fixed.

12. The device according to any one of claims 1 to 11, wherein the interface element (4) has a fastening region (4A) that is planarly attached to and fastened to the contact region (3B) of the mechanical amplification element (3).

13. The device according to claim 12, wherein the fastening region (4A) is bonded to the abutting region (3B).

14. The device according to claim 12 or 13, wherein the fastening region (4A) is bent around the abutment region (3B).

15. The device according to any one of claims 12 to 14, wherein the fastening region (4A) for fastening with the abutment region (3B) is at least one of threaded connection, riveting, clamping and insertion.

16. The device according to any one of claims 1 to 11, wherein the interface element (4) and the mechanical amplification element (3) are implemented in one piece.

17. The device according to claim 16, wherein the mechanical amplification element (3) is implemented as a region bent perpendicular to the interface element (4).

18. The device according to claim 17, wherein the mechanical amplifying element (3) has curved edges (3C, 3D) on one or more sides to reinforce the amplifying element (3).

19. The device according to any one of claims 1 to 18, wherein the actuator component (1) includes a spring portion (7) serving as a spring, wherein the spring portion (7) is designed to, This allows the actuator component (1) to be positioned between the two components (20, 30) in at least the first direction x to meet tolerances by compressing the spring portion (7), and After the actuator component (1) is positioned between the two components (20, 30) and before the fixing, the spring portion (7) preloads the piezoelectric actuator to the desired degree.

20. The device according to claim 19, wherein the spring portion (7) is designed such that the actuator component (1) is fixed in its position by the spring portion (7) after being positioned between the two components (20, 30) and before being fixed.

21. The device according to any one of claims 19 or 20, wherein the actuator component (1) comprises the interface element (4) and the spring portion (7) serving as a spring, wherein the spring portion (7) is designed to, This allows the actuator component (1) to be positioned between the two components (20, 30) in at least the first direction x to meet tolerances by compressing the spring portion (7), and After the actuator component (1) is positioned between the two components (20, 30) and before the fixing, the spring portion (7) preloads the piezoelectric actuator (2) to the desired degree.

22. The device according to any one of claims 19 to 21, wherein the spring portion (7) and the interface element (4) are integrally formed as part of the interface element (4).

23. The device according to any one of claims 19 to 21, wherein the spring portion (7) is a component independent of the interface element (4), the component being disposed between the interface element (4) and the component.

24. The device according to any one of claims 19 to 23, wherein two symmetrically arranged spring portions (7) are provided or constituted at the interface element (4) of the actuator component (1).

25. The device according to any one of claims 1 to 24, wherein the interface element (4) has a blanking portion for reducing material consumption.

26. The device according to any one of claims 1 to 25, wherein the interface element (4) is planarly supported on the component.

27. The device according to claim 26, wherein the interface element (4) is fixed to the component by means of adhesive bonding or by means of threaded connection.

28. The device according to claim 27, wherein the interface element (4) has a structure with regularly arranged honeycomb-shaped gaps to facilitate bonding.

29. The device according to any one of claims 26 to 28, wherein the interface element (4) has a centering auxiliary mechanism (9) configured to facilitate precise positioning of the interface element (4) on the component or to pre-set a precise position in at least one spatial direction.

30. The device according to claim 29, wherein the centering auxiliary mechanism (9) is a curved edge, the curved edge being configured to pre-position the interface element (4) precisely at least in the first direction x.

31. The device according to claim 30, wherein the curved edge is configured such that the curved edge allows for a fit tolerance when positioning the interface element (4).

32. The device according to any one of claims 1 to 31, wherein the interface element (4) and the mechanical amplification element (3) are made of the same material.

33. The device according to any one of claims 1 to 32, wherein the interface element (4) is made of an electrically insulating material and has electromagnetic shielding properties.

34. The device according to any one of claims 1 to 33, wherein the mechanical amplification element (3) or the interface element (4) implemented in one piece with the mechanical amplification element (3) has a damping portion (11) for attenuating the movement of the mechanical amplification element (3) toward the piezoelectric actuator (2) and for limiting the movement.

35. The device according to claim 34, wherein the damping portion (11) is implemented as a mechanical spring positioned between the mechanical amplification element (3) and the piezoelectric actuator (2).

36. The device according to any one of claims 1 to 35, wherein a motion sensor, force sensor or pressure sensor for measuring the deflection of the mechanical amplification element (3) is positioned between the mechanical amplification element (3) and the piezoelectric actuator (2).

37. The device according to claim 36, wherein the sensor is a capacitive sensor, the capacitive sensor comprising a first conductor and a second conductor, the first conductor being part of the mechanical amplification element (3) and the second conductor being part of the piezoelectric actuator (2).

38. The device according to any one of claims 1 to 37, wherein the component includes a positioning aid (8) adapted to fix the position of the interface element (4) on the component with a clearance tolerance.

39. The device according to claim 38, wherein the positioning aid (8) is adapted to fix the interface element (4) in its position after the positioning and before the fixing.

40. The device according to claim 38 or 39, wherein the positioning aid (8) is implemented as a pin or dowel, and wherein the interface element (4) has a recess into which the positioning aid (8) can be inserted.

41. The device according to any one of claims 38 to 40, wherein the positioning aid (8) is adapted to determine the position of the two components (20, 30) relative to each other and to limit the movement of the two components (20, 30) relative to each other.

42. The device according to any one of claims 1 to 41, wherein the actuator component (1) further comprises a second mechanical amplification element (3) fastened to the piezoelectric actuator (2), wherein the piezoelectric actuator (2) is disposed between the first mechanical amplification element and the second mechanical amplification element (3). Furthermore, the actuator component includes a second interface element (4), which, by fixing the second interface element (4) to the second amplifying element (3) and the component, mechanically connects the second mechanical amplifying element (3) to a corresponding component different from the first interface element (4). The second interface element (4) is configured to provide a mating tolerance in at least one spatial direction when the actuator component (1) is fixed at the component during installation. The second mechanical amplification element (3) is configured and arranged to be deformed by the elongation of the piezoelectric actuator in the first direction, such that the contact area (3B) of the second mechanical amplification element (3) moves relative to the piezoelectric actuator (2) in the second direction, thereby applying force to the component via the second interface element (4).

43. The device according to any one of claims 1 to 42, the device having wiring elements (40, 41), wherein the piezoelectric actuator (2) has an external electrode (50) electrically connected to the wiring elements (40, 41).

44. The device according to any one of claims 1 to 43, the device having a connecting element (37) in the form of a weld point or adhesive point or weld or adhesive seam, the connecting element being reinforced at the transition between the mechanical amplification element (3) and the interface element (4).

45. A method for assembling the device according to any one of claims 1 to 44, The actuator component (1) is positioned between the two components that are movable relative to each other, and is fixed between the two components (20, 30) by means of the interface element (4).

Images