Haptic feedback excitation device and electronic device
By employing a combination structure of multilayer piezoelectric actuators, metal cymbals, and substrate in the haptic feedback excitation device, the high cost problem in the prior art is solved, and a low-cost haptic feedback effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BESTAR HLDG
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-05
AI Technical Summary
Existing dual-cylinder piezoelectric ceramic actuators require more than nine layers, resulting in high product costs.
The device employs a combination structure of multi-layer piezoelectric actuators, metal cymbals, and a substrate. The number of layers in the piezoelectric actuator is less than nine. The center of the metal cymbal protrudes from the edge and is attached to the edge of the piezoelectric actuator. The substrate is attached to the side of the piezoelectric actuator away from the metal cymbal. When voltage is applied, the piezoelectric actuator contracts toward the center, and the metal cymbal and the substrate bend and deform in opposite directions. This reduces the number of layers in the piezoelectric actuator and improves the vibration effect.
While maintaining the tactile feedback effect, the cost of the tactile feedback excitation device was significantly reduced. By reasonably controlling the number of piezoelectric layers and the structural design, a vibration effect with excellent cost performance was achieved.
Smart Images
Figure CN224328396U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tactile feedback technology, and in particular to a tactile feedback excitation device and electronic device. Background Technology
[0002] Haptic feedback is a technology that allows users to perceive virtual or remote objects through mechanical vibration or deformation responses. It is widely used in smart devices, VR, human-computer interaction, medical simulation, and remote operation. Existing haptic feedback actuators include linear motors and piezoelectric ceramic actuators. Compared with linear motors, piezoelectric ceramic actuators have advantages such as lower energy consumption, faster response speed, and stronger acceleration.
[0003] In related technologies, such as Chinese invention patent application CN117500358A published on February 2, 2024, a piezoelectric device and electronic device are disclosed. It uses two pressure contact surfaces arranged along the thickness direction of the piezoelectric sheet and two linkage members arranged on the two pressure contact surfaces of the piezoelectric sheet. The linkage members include a platform part and a linkage part. The platform part has at least four sides, and the linkage part is connected to the pressure contact surface. As the piezoelectric sheet expands and contracts in the horizontal direction, the linkage part vibrates in the vertical direction, thereby realizing vibration.
[0004] However, the inventors discovered that the piezoelectric ceramics of the aforementioned double cymbals typically need to be maintained in more than nine layers, which makes the product cost higher. Utility Model Content
[0005] In view of at least one of the above technical problems, the present invention provides a tactile feedback excitation device and electronic device, which adopts structural improvements to reduce product costs while maintaining essentially the same tactile feedback.
[0006] According to a first aspect of the present invention, a tactile feedback excitation device and an electronic device are provided, comprising:
[0007] A piezoelectric actuator, wherein the piezoelectric actuator comprises multiple piezoelectric layers, and the number of piezoelectric layers is less than 9;
[0008] A metal cymbal, wherein the center of the metal cymbal protrudes beyond the edge, and the edge of the metal cymbal is attached to the edge of the piezoelectric actuator;
[0009] The substrate is attached to the side of the piezoelectric actuator opposite to the metal cymbal.
[0010] The piezoelectric actuator is configured to contract toward the center when a voltage is applied, causing the center of the metal cymbal to move away from the piezoelectric actuator, and the piezoelectric actuator and the substrate to bend and deform together in a direction away from the metal cymbal.
[0011] Furthermore, the piezoelectric actuator has at least three piezoelectric layers.
[0012] Furthermore, the substrate and the piezoelectric actuator are circular, the diameter of the substrate is not less than the diameter of the piezoelectric actuator, and the thickness of the substrate is less than the thickness of the piezoelectric actuator.
[0013] Furthermore, the substrate is made of metal.
[0014] Furthermore, the substrate is made of brass, nickel alloy, or stainless steel.
[0015] Furthermore, the thickness of the metal cymbal is less than the thickness of the piezoelectric actuator. The metal cymbal includes a central disc, a bottom ring, and an inclined sidewall connecting the central disc and the bottom ring. The diameter of the bottom ring is not greater than the diameter of the piezoelectric actuator.
[0016] Furthermore, the central disc has a central through hole at its center.
[0017] Furthermore, a plurality of fan-shaped holes are evenly distributed along the circumferential direction on the inclined sidewall, the inner end of the fan-shaped holes extends to the outer wall of the central circular piece, and the outer end of the fan-shaped holes extends to the inner wall of the bottom ring.
[0018] Furthermore, the included angle between two adjacent fan-shaped hole sidewalls on the inclined sidewall ranges from 0 to 30 degrees.
[0019] According to a first aspect of the present invention, an electronic device is provided, comprising a tactile feedback excitation device as described in any one of the first aspects.
[0020] The beneficial effects of this utility model are as follows: By bonding the piezoelectric actuator to the substrate and reducing the number of layers of the piezoelectric actuator, and by utilizing the reverse bending deformation of the piezoelectric actuator and the substrate while the metal cymbals are moving, the amplitude of the tactile feedback excitation device is close to the vibration effect of the double cymbals. Compared with the prior art, this significantly reduces the cost of the tactile feedback excitation device. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a side view of the haptic feedback excitation device in an embodiment of the present invention;
[0023] Figure 2 As an embodiment of this utility model Figure 1 A magnified schematic diagram of the structure at point A in the diagram;
[0024] Figure 3 This is a schematic diagram of the tactile feedback excitation device in its initial state in an embodiment of this utility model;
[0025] Figure 4 This is a schematic diagram of the movement of the metal cymbals during contraction in the tactile feedback excitation device of this utility model embodiment;
[0026] Figure 5 This is a schematic diagram of the reverse bending deformation of the metal cymbal of the tactile feedback excitation device, the piezoelectric actuator, and the substrate in an embodiment of this utility model.
[0027] Figure 6 This is a three-dimensional structural diagram of the tactile feedback excitation device in an embodiment of this utility model;
[0028] Figure 7 This is a top view of the tactile feedback excitation device in an embodiment of this utility model;
[0029] Figure 8 This is a schematic diagram of the simulation structure of the dual-cymbal exciter in this related technology;
[0030] Figure 9 This is a schematic diagram of the simulation structure of the tactile feedback excitation device in the embodiments of this utility model;
[0031] Figure 10 This is a data comparison diagram of the tactile feedback excitation device and the dual-cymbal exciter in the embodiments of this utility model.
[0032] Explanation of reference numerals in the attached drawings: 1. Piezoelectric actuator; 2. Metal cymbal; 21. Central disc; 211. Central through hole; 22. Inclined sidewall; 221. Fan-shaped hole; 23. Bottom ring; 3. Substrate. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0036] like Figures 1 to 10 The haptic feedback excitation device shown includes a piezoelectric actuator 1, a metal cymbal 2, and a substrate 3. Please refer to the following for details. Figure 1 and Figure 2 In the implementation of this utility model, the piezoelectric actuator 1 includes multiple piezoelectric layers, and the number of piezoelectric layers is less than 9. It should be noted that the piezoelectric actuator 1 in this utility model is made of PZT material, namely titanium lead zirconate, which has a fast response speed and is easy to process into thin sheets.
[0037] Please refer to Figure 2 and Figure 3 In this embodiment of the invention, the center of the metal cymbal 2 protrudes beyond the edge, and the edge of the metal cymbal 2 is attached to the edge of the piezoelectric actuator 1. This structure allows the metal cymbal 2 to move in a direction perpendicular to the contraction of the piezoelectric actuator 1 when the piezoelectric actuator 1 contracts horizontally under applied voltage. Specifically, as shown... Figure 4 As shown, when the piezoelectric actuator 1 retracts towards the center, the center of the metal cymbal 2 moves upward.
[0038] Please continue to refer to Figure 2 and Figure 3 In this embodiment of the present invention, the substrate 3 is attached to the side of the piezoelectric actuator 1 away from the metal cymbal 2; unlike the way the edge of the metal cymbal 2 is attached to the piezoelectric actuator 1, the substrate 3 is fully attached, and the attachment of the substrate 3 can protect the piezoelectric actuator 1.
[0039] Please refer to Figures 3 to 5 The piezoelectric actuator is configured to contract toward the center when a voltage is applied, causing the center of the metal cymbal 2 to move away from the piezoelectric actuator 1, while the piezoelectric actuator 1 and the substrate 3 together bend and deform away from the metal cymbal 2.
[0040] In the above embodiment, by bonding the piezoelectric actuator 1 to the substrate 3 and reducing the number of layers of the piezoelectric actuator 1, and by utilizing the reverse bending deformation of the piezoelectric actuator 1 and the substrate 3 while the metal cymbal 2 is moving, the amplitude of the haptic feedback excitation device is close to the vibration effect of the double cymbals. Compared with the prior art, the cost of the haptic feedback excitation device is significantly reduced.
[0041] Based on the above embodiments, in some embodiments of this utility model, the piezoelectric actuator 1 has no fewer than three piezoelectric layers. Here, "no fewer than three layers" means three or more layers. The more piezoelectric layers there are, the greater the total output displacement. Furthermore, since all the piezoelectric layers are electrically connected in parallel, a relatively low voltage can actually achieve sufficient overall displacement. However, more layers mean higher costs, and a greater number of layers also presents the problem of easy debonding between layers. In the embodiments of this utility model, a three-layer structure is adopted to reasonably control costs and vibration effects, achieving the best cost-effectiveness.
[0042] In embodiments of this utility model, such as Figure 6 As shown, the substrate 3 and the piezoelectric actuator 1 are circular. The diameter of the substrate 3 is not less than the diameter of the piezoelectric actuator 1, and the thickness of the substrate 3 is less than the thickness of the piezoelectric actuator 1. It should be noted that in this embodiment of the invention, the substrate 3 is made of metal. Specifically, it can be made of brass, nickel alloy, or stainless steel. "Not less than the diameter of the piezoelectric actuator 1" means that the diameter of the substrate 3 is equal to or slightly larger than the diameter of the piezoelectric actuator 1, and its thickness is approximately 1 / 3 to 1 / 2 of the diameter of the piezoelectric actuator 1. By using a metal substrate 3 that is slightly larger than the piezoelectric actuator 1, protection is achieved for the piezoelectric actuator 1. Because in a double-cymbal structure, the piezoelectric ceramic is unprotected and easily breaks under stress. In this embodiment of the invention, by fully covering the piezoelectric actuator 1 with a diameter slightly larger than the piezoelectric actuator 1, the piezoelectric actuator 1 is protected while also improving the stability of the product.
[0043] For details regarding the specific structure of the metal cymbal piece 2 in the embodiments of this utility model, please refer to [link / reference]. Figure 6 The thickness of the metal cymbal 2 is less than the thickness of the piezoelectric actuator 1. The metal cymbal 2 includes a central disc 21, a bottom ring 23, and an inclined sidewall 22 connecting the central disc 21 and the bottom ring 23. The diameter of the bottom ring 23 is not greater than the diameter of the piezoelectric actuator 1. It should be noted that the metal cymbal 2 is made of titanium alloy, stainless steel, or other metals, and its diameter is not greater than the diameter of the piezoelectric actuator 1. Specifically, the outer diameter of the bottom ring 23 is the same as or slightly smaller than the diameter of the piezoelectric actuator 1, and its thickness is approximately 1 / 3 to 1 / 2 of the diameter of the piezoelectric actuator 1. The inclined sidewall 22 is inclined so that the central disc 21 is higher than the piezoelectric actuator 1. This arrangement causes the angle between the inclined sidewall 22 and the piezoelectric actuator 1 to increase when the bottom ring 23 retracts with the piezoelectric actuator 1. This pushes the central disc 21 to move in a direction perpendicular to and away from the piezoelectric actuator 1. At this time, due to the reverse force applied by the inclined sidewall 22 to the bottom ring 23, the centers of the piezoelectric actuator 1 and the substrate 3 move away from the metal cymbal 2. The specific movement can be found in [reference needed]. Figure 5 and Figure 9 As shown in the image.
[0044] In embodiments of this utility model, to prevent a pressure difference between the cavity formed between the metal cymbal 2 and the piezoelectric actuator 1 and the outside environment from affecting the movement of the metal cymbal 2, such as... Figure 6 As shown, the center disc 21 has a central through hole 211 at its center. The central through hole 211 is located at the center of the center disc 21 and its diameter is smaller than that of the center disc 21. The central through hole 211 allows the cavity between the metal cymbal 2 and the piezoelectric actuator 1 to be connected to the outside, thereby avoiding the obstruction of the movement of the metal cymbal 2 caused by pressure difference and improving the smoothness of product vibration.
[0045] Please continue to refer to Figure 6 and Figure 7 In an embodiment of this utility model, to further improve the displacement and acceleration of the metal cymbal 2, a plurality of fan-shaped holes 221 are evenly distributed along the circumferential direction on the inclined sidewall 22. The inner end of the fan-shaped holes 221 extends to the outer wall of the central circular piece 21, and the outer end of the fan-shaped holes 221 extends to the inner wall of the bottom ring 23. The arrangement of the fan-shaped holes 221 reduces the rigidity of the inclined sidewall 22, thereby increasing the amplitude. Due to the reduced rigidity, the reverse force on the piezoelectric actuator 1 is reduced, thus relatively increasing the acceleration. It should be noted that the angle dimensions of the fan-shaped holes 221 can be set by those skilled in the art as needed. In an embodiment of this utility model, such as... Figure 7 As shown, the included angle between the sidewalls of two adjacent sector holes 221 on the inclined sidewall 22 ranges from 0 to 30 degrees. Figure 7 As shown in the embodiment of this utility model, the included angle between the two sides of the inclined sidewall 22 between two adjacent fan-shaped holes 221 is 10°. As the included angle gradually increases, it means that the overall width of the inclined sidewall 22 increases, and the displacement begins to decrease. Those skilled in the art can set the included angle as needed.
[0046] In an embodiment of the utility model, an electronic device is also provided, which includes the haptic feedback excitation device as described above. The electronic device can be a smart electronic product, and the haptic feedback excitation device can be a virtual button or similar element on the surface of the smart electronic product.
[0047] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A tactile feedback excitation device, characterized in that, include: A piezoelectric actuator, wherein the piezoelectric actuator comprises multiple piezoelectric layers, and the number of piezoelectric layers is less than 9; A metal cymbal, wherein the center of the metal cymbal protrudes beyond the edge, and the edge of the metal cymbal is attached to the edge of the piezoelectric actuator; The substrate is attached to the side of the piezoelectric actuator opposite to the metal cymbal. The piezoelectric actuator is configured to contract toward the center when a voltage is applied, causing the center of the metal cymbal to move away from the piezoelectric actuator, and the piezoelectric actuator and the substrate to bend and deform together in a direction away from the metal cymbal.
2. The tactile feedback excitation device according to claim 1, characterized in that, The piezoelectric actuator has at least three piezoelectric layers.
3. The tactile feedback excitation device according to claim 1, characterized in that, The substrate and the piezoelectric actuator are circular, with the diameter of the substrate not less than the diameter of the piezoelectric actuator and the thickness of the substrate less than the thickness of the piezoelectric actuator.
4. The tactile feedback excitation device according to claim 3, characterized in that, The substrate is made of metal.
5. The tactile feedback excitation device according to claim 4, characterized in that, The substrate is made of brass, nickel alloy, or stainless steel.
6. The tactile feedback excitation device according to claim 3, characterized in that, The thickness of the metal cymbal is less than the thickness of the piezoelectric actuator. The metal cymbal includes a central disc, a bottom ring, and an inclined sidewall connecting the central disc and the bottom ring. The diameter of the bottom ring is not greater than the diameter of the piezoelectric actuator.
7. The tactile feedback excitation device according to claim 6, characterized in that, The central disc has a central through hole at its center.
8. The tactile feedback excitation device according to claim 6 or 7, characterized in that, The inclined sidewall has a plurality of fan-shaped holes evenly distributed along the circumference. The inner end of the fan-shaped hole extends to the outer wall of the central circular piece, and the outer end of the fan-shaped hole extends to the inner wall of the bottom ring.
9. The tactile feedback excitation device according to claim 8, characterized in that, The included angle between two adjacent fan-shaped hole sidewalls on the inclined sidewall ranges from 0 to 30 degrees.
10. An electronic device, characterized in that, Includes the haptic feedback excitation device as described in any one of claims 1 to 9.