Piezoelectric ceramic-based automobile door handle with tactile feedback

Abstract

The utility model relates to the technical field of piezoelectric materials, in particular to an automobile door handle with tactile feedback based on piezoelectric ceramics, which comprises a handle body, one surface of the handle body facing a mounting surface is provided with a concave surface, and the handle body is internally provided with an accommodating cavity close to the concave surface; the tactile feedback device comprises an actuator, a piezoelectric ceramic unit and a control unit; the actuator is arranged in the accommodating cavity; the piezoelectric ceramic unit is arranged on the concave surface and is electrically connected with the actuator; the control unit is electrically connected with the piezoelectric ceramic unit and the actuator; and the control unit drives the actuator to generate vibration with corresponding intensity according to the electric signal generated by the piezoelectric ceramic unit. The electric ceramic unit is used for detecting the holding state, the control unit is used for driving the actuator to provide corresponding vibration feedback, the piezoelectric ceramic unit can directly sense holding pressure or finger contact changes, a user can visually sense the vibration feedback of the handle body, and the tactile feedback experience of the user is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to piezoelectric material technical field especially relates to a take touch feedback's car door handle based on piezoelectric ceramic. BACKGROUND

[0002] In modern automobile design, the improvement of user experience has become an important development direction, especially in the way of opening and interacting with the door, more and more intelligent design is applied. The traditional mechanical car door handle mainly relies on the physical pressing or pulling structure to realize the opening of the door, lacks intelligent feedback mechanism, and the user cannot obtain clear feedback information when operating, which is easy to cause misoperation due to environmental factors (such as low temperature, humidity or night environment), affecting the convenience of use.

[0003] In recent years, the haptic feedback technology has been widely used in consumer electronics and intelligent interaction field, which can provide intuitive operation confirmation through vibration or pressure feedback. However, the existing haptic feedback car door handle usually adopts mechanical vibration motor or piezoelectric element, but fails to fully combine the holding state perception and haptic feedback, so that the feedback intensity is single, it is difficult to dynamically adjust according to the actual holding condition of the user, resulting in poor feedback experience. SUMMARY

[0004] In view of at least one of the above technical problems, the utility model provides a car door handle with haptic feedback based on piezoelectric ceramic, which adopts the improvement of structure to enhance the haptic feedback experience of the user.

[0005] According to the first aspect of the utility model, a car door handle with haptic feedback based on piezoelectric ceramic is provided, which comprises:

[0006] The handle body is used for mounting on the door, and one side of the handle body towards the mounting surface has a concave recessed surface, and the handle body further has a containing cavity arranged close to the recessed surface inside;

[0007] The haptic feedback device comprises an actuator, a piezoelectric ceramic unit and a control unit;

[0008] The actuator is arranged inside the containing cavity and is arranged in close contact with the surface adjacent to the containing cavity and the recessed surface, and is used for generating vibration feedback;

[0009] The piezoelectric ceramic unit is arranged on the recessed surface and is electrically connected with the actuator, and is used for generating corresponding electric signal according to the holding state of the handle body;

[0010] The control unit is electrically connected with the piezoelectric ceramic unit and the actuator, and is arranged in the containing cavity, and is used for receiving the electric signal and feeding back to the haptic feedback device;

[0011] The control unit drives the actuator to generate vibration of corresponding intensity according to the electric signal generated by the piezoelectric ceramic unit.

[0012] In some embodiments of the utility model, the piezoelectric ceramic unit includes a plurality of modules connected in series, and the modules are arranged by laminating piezoelectric ceramic layers, electrode layers and insulation layers.

[0013] In some embodiments of the utility model, the insulation layers are arranged between the electrode layers, and the electrode layers between the modules are sequentially connected according to electrodes.

[0014] In some embodiments of the utility model, a first mounting groove is arranged on the inner wall of the accommodating cavity, the first mounting groove is arranged on the side close to the concave surface, and the actuator is mounted in the first mounting groove.

[0015] In some embodiments of the utility model, a second mounting groove is further arranged on the inner wall of the accommodating cavity, the second mounting groove is arranged on the side away from the concave surface, and the control unit is mounted in the second mounting groove.

[0016] In some embodiments of the utility model, the second mounting groove is a rectangular groove body, the groove wall of the groove body is integrally formed with the inner wall of the accommodating cavity, and the opening of the second mounting groove is arranged towards the center direction of the accommodating cavity.

[0017] In some embodiments of the utility model, the second mounting groove is provided with a plurality of fixing pins, and the outer wall of the control unit is provided with positioning holes matched with the fixing pins.

[0018] In some embodiments of the utility model, an anti-skid pattern is further arranged on the outer wall of the concave surface, and the anti-skid pattern is arranged staggered with the piezoelectric ceramic unit.

[0019] The utility model discloses the beneficial effects are: the utility model discloses a handle body inside setting accommodating cavity and integrating piezoelectric ceramic unit, actuator and control unit, and the piezoelectric ceramic unit detects the holding state, and provides corresponding vibration feedback through the control unit drive actuator, compared with the traditional technology, and the piezoelectric ceramic unit can directly perceive the holding pressure or finger contact change, so that the user can intuitively perceive the vibration feedback of handle body, thereby enhancing the tactile feedback experience of user. BRIEF DESCRIPTION OF DRAWINGS

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the structure of a car door handle with tactile feedback based on piezoelectric ceramics in an embodiment of this utility model;

[0022] Figure 2 This is a side sectional view of the handle body in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the module stacking arrangement in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram showing the fit between the fixing pin and the positioning hole in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the anti-slip texture in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Handle body; 11. Receiving cavity; 11a. First mounting groove; 11b. Second mounting groove; 12. Anti-slip texture; 2. Tactile feedback device; 21. Actuator; 22. Piezoelectric ceramic unit; 22a. Module; 22a1. Piezoelectric ceramic layer; 22a2. Electrode layer; 22a3. Insulating layer; 23. Control unit; a. Fixing pin; b. Positioning hole. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figures 1 to 5 The piezoelectric ceramic-based car door handle with haptic feedback shown includes:

[0031] The handle body 1 is used to be installed on the car door. The side of the handle body 1 facing the mounting surface has a recessed surface, and the handle body 1 also has a receiving cavity 11 located near the recessed surface.

[0032] The tactile feedback device 2 includes an actuator 21, a piezoelectric ceramic unit 22, and a control unit 23;

[0033] The actuator 21 is disposed inside the accommodating cavity 11 and is fitted to the recessed surface and the adjacent surface inside the accommodating cavity 11 to generate vibration feedback.

[0034] The piezoelectric ceramic unit 22 is disposed on the recessed surface and electrically connected to the actuator 21, and is used to generate corresponding electrical signals according to the gripping state of the handle body 1.

[0035] The control unit 23 is electrically connected to the piezoelectric ceramic unit 22 and the actuator 21, and is disposed in the accommodating cavity 11. It is used to receive electrical signals and feed them back to the tactile feedback device 2.

[0036] The control unit 23 drives the actuator 21 to generate vibrations of corresponding intensity based on the electrical signal generated by the piezoelectric ceramic unit 22.

[0037] like Figure 1 and Figure 2As shown, the handle body 1 has a recessed surface with an inward structure on the side facing the mounting surface, which is used to accommodate the piezoelectric ceramic unit 22. The actuator 21 is installed inside the accommodating cavity 11 and fits against the cavity surface adjacent to the recessed surface. When the control unit 23 receives an electrical signal, the actuator 21 generates vibration feedback, thereby providing tactile information to the user. The piezoelectric ceramic unit 22 is mounted on the recessed surface and is electrically connected to the actuator 21. This unit generates corresponding electrical signals by sensing the gripping state of the handle, such as pressure and contact area. The control unit 23 is disposed within the accommodating cavity 11 and is electrically connected to both the piezoelectric ceramic unit 22 and the actuator 21. Its function is to receive the electrical signals transmitted by the piezoelectric ceramic unit 22 and, based on these signals, drive the actuator 21 to provide vibration feedback of varying intensities to the user's operating state. When a user holds or touches the handle, the piezoelectric ceramic unit 22 senses the user's hand contact and converts it into an electrical signal; the control unit 23 receives the electrical signal and processes it according to the set feedback mechanism to determine whether to trigger tactile feedback; if the feedback conditions are met, the control unit 23 drives the actuator 21 to work, and the actuator 21 provides feedback on the user's current operating status through vibration, such as unlocking, locking, or warning prompts.

[0038] In the above embodiments, the present invention provides a receiving cavity 11 inside the handle body 1 and integrates a piezoelectric ceramic unit 22, an actuator 21 and a control unit 23. The piezoelectric ceramic unit detects the gripping state and the control unit 23 drives the actuator 21 to provide corresponding vibration feedback. Compared with traditional technology, the piezoelectric ceramic unit 22 can directly sense the gripping pressure or changes in finger contact, allowing the user to intuitively perceive the vibration feedback of the handle body 1, thereby enhancing the user's tactile feedback experience.

[0039] In an embodiment of this utility model, the piezoelectric ceramic unit 22 includes multiple modules 22a connected in series. Each module 22a is formed by stacking a piezoelectric ceramic layer 22a1, an electrode layer 22a2, and an insulating layer 22a3. For example... Figure 3As shown, the piezoelectric ceramic unit 22 is composed of multiple modules 22a connected in series. The piezoelectric ceramic units 22 are stacked, with piezoelectric ceramic layers 22a1 and electrode layers 22a2 stacked sequentially in the same direction. The piezoelectric ceramic layer 22a1 is made of a piezoelectric material, such as lead zirconate titanate. These materials exhibit piezoelectric effects, generating electrical signals when subjected to mechanical stress or undergoing mechanical deformation when an electric field is applied. The electrode layer 22a2 is made of a conductive material, such as copper or silver. The function of the electrode layer 22a2 is to provide an electric field to the piezoelectric ceramic layer 22a1 or to transmit electrical signals generated by the piezoelectric ceramic layer 22a1. When mechanical vibration is required in the piezoelectric ceramic layer 22a1, the electrode layer 22a2 applies a voltage to the piezoelectric ceramic layer 22a1, exciting its deformation; when the piezoelectric ceramic layer 22a1 is subjected to mechanical stress, the electrode layer 22a2 collects the generated electrical signals and transmits them to the control unit 23 for processing. The insulating layer 22a3 can be made of ceramic, polymer, or other high-resistivity materials. The main function of the insulating layer 22a3 is to prevent electrical short circuits between adjacent electrode layers 22a2. Since the electrode layers 22a2 are conductive, without the insulating layer 22a3, adjacent electrode layers 22a2 might come into direct contact, leading to a short circuit and affecting the normal operation of the piezoelectric ceramic unit 22, thus improving the reliability and stability of the piezoelectric ceramic unit 22. This series design enhances the overall performance of the piezoelectric ceramic unit 22, such as increasing output voltage or sensitivity, while also better adapting to the shape and functional requirements of the handle. The insulating layer 22a3 is positioned between the electrode layers 22a2, and the electrode layers 22a2 of each module 22a are connected sequentially according to their electrodes. Specifically, the electrode layer 22a2 of each module 22a is divided into a positive electrode and a negative electrode. The positive electrode of the previous module 22a is connected to the negative electrode of the next module 22a, forming a series circuit. This allows the piezoelectric ceramic unit 22 to cover a larger area while maintaining high sensitivity and stability.

[0040] In an embodiment of this utility model, a first mounting groove 11a is provided on the inner wall of the accommodating cavity 11, the first mounting groove 11a being located near the recessed surface, and the actuator 21 is installed in the first mounting groove 11a; a second mounting groove 11b is also provided on the inner wall of the accommodating cavity 11, the second mounting groove 11b being located away from the recessed surface, and the control unit 23 is installed in the second mounting groove 11b. Figure 2As shown, since the actuator 21 needs to be in direct or indirect contact with the user's hand to provide vibration feedback, mounting it in the first mounting slot 11a ensures that the vibration can be effectively transmitted to the user's hand. Mounting the control unit 23 in the second mounting slot 11b, away from the recess, avoids interference from mechanical stress when the user grips it, ensuring stable operation. The accommodating cavity 11 achieves functional partitioning through the first mounting slot 11a and the second mounting slot 11b. The actuator 21 and the control unit 23 are installed in different areas, ensuring functional independence while optimizing space utilization.

[0041] In an embodiment of this utility model, the second mounting groove 11b is a rectangular groove, the groove wall of which is integrally formed with the inner wall of the receiving cavity 11, and the opening of the second mounting groove 11b is oriented towards the center of the receiving cavity 11. Figure 2 As shown, the one-piece molding indicates that the second mounting groove 11b and the receiving cavity 11 are a single structure, rather than being assembled and connected later. The opening facing the center facilitates the installation of the control unit 23 into the groove. This design not only improves the structural strength and sealing performance but also optimizes the spatial layout, making component installation and maintenance easier.

[0042] In this embodiment of the invention, the second mounting groove 11b is provided with a plurality of fixing pins a, and the outer wall of the control unit 23 is provided with positioning holes b that are adapted to the fixing pins a. The number of fixing pins a is configured according to the size and weight of the control unit 23, and the positions of the positioning holes b correspond one-to-one with the positions of the fixing pins a. The fitting method between the two can be interference fit or clearance fit, etc. This arrangement not only improves the reliability and vibration resistance of the system, but also makes the installation and maintenance of the control unit 23 more convenient.

[0043] In an embodiment of this utility model, anti-slip texture 12 is also provided on the outer wall of the recessed surface, and the anti-slip texture 12 is staggered from the piezoelectric ceramic unit 22. Figure 5 As shown, the anti-slip texture 12 is not limited to the illustrated example; it can also take the form of a grid pattern, stripe pattern, dot pattern, or a combination thereof. When a user grips the door handle, the anti-slip texture 12 not only provides a stable grip, but also effectively prevents the hand from slipping, for example, in rainy or wet environments.

[0044] 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 car door handle with haptic feedback based on piezoelectric ceramics, characterized in that, include: A handle body for mounting on a vehicle door, wherein the handle body has a recessed surface on the side facing the mounting surface, and the handle body also has an accommodating cavity located near the recessed surface. The tactile feedback device includes an actuator, a piezoelectric ceramic unit, and a control unit; The actuator is disposed inside the accommodating cavity and is fitted to the recessed surface adjacent to the surface inside the accommodating cavity to generate vibration feedback. The piezoelectric ceramic unit is disposed on the recessed surface and electrically connected to the actuator, and is used to generate corresponding electrical signals according to the gripping state of the handle body; The control unit is electrically connected to the piezoelectric ceramic unit and the actuator, and is disposed in the accommodating cavity to receive the electrical signal and feed it back to the tactile feedback device. The control unit drives the actuator to generate vibrations of corresponding intensity based on the electrical signals generated by the piezoelectric ceramic unit.

2. The car door handle with haptic feedback based on piezoelectric ceramics according to claim 1, characterized in that, The piezoelectric ceramic unit includes multiple modules connected in series, and each module is composed of a piezoelectric ceramic layer, an electrode layer, and an insulating layer stacked together.

3. The car door handle with haptic feedback based on piezoelectric ceramics according to claim 2, characterized in that, The insulating layer is disposed between the electrode layers, and the electrode layers of each module are connected sequentially according to the electrodes.

4. The car door handle with haptic feedback based on piezoelectric ceramics according to claim 1, characterized in that, A first mounting groove is provided on the inner wall of the accommodating cavity. The first mounting groove is located on the side close to the recessed surface, and the actuator is installed in the first mounting groove.

5. The automotive door handle with haptic feedback based on piezoelectric ceramics according to claim 4, characterized in that, A second mounting groove is also provided on the inner wall of the accommodating cavity. The second mounting groove is located on the side away from the recessed surface, and the control unit is installed in the second mounting groove.

6. The automotive door handle with haptic feedback based on piezoelectric ceramics according to claim 5, characterized in that, The second mounting groove is a rectangular groove, the groove wall of which is integrally formed with the inner wall of the receiving cavity, and the opening of the second mounting groove is oriented towards the center of the receiving cavity.

7. The automotive door handle with haptic feedback based on piezoelectric ceramics according to claim 6, characterized in that, The second mounting slot is provided with a plurality of fixing pins, and the outer wall of the control unit is provided with positioning holes that are adapted to the fixing pins.

8. The automotive door handle with haptic feedback based on piezoelectric ceramics according to claim 1, characterized in that, The outer wall of the recessed surface is also provided with anti-slip texture, which is staggered from the piezoelectric ceramic unit.

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