A haptic feedback device

Abstract

The application relates to the technical field of human-computer interaction, in particular to a kind of haptic feedback device, comprising: touch screen, for display and touch input;Rear shell, it is in the basin type structure, including the side wall that encloses closed area and the bottom wall vertical to side wall, touch screen is connected to the top of side wall, bottom wall has accommodating cavity;Base, connect with rear shell, for supporting rear shell and touch screen;Vibration assembly, set in the accommodating cavity of rear shell;Wherein, there is gap between accommodating cavity and touch screen, vibration assembly generates vibration when energized, the vibration of vibration assembly is transmitted to the side wall through bottom wall, the side wall drives the whole touch screen to vibrate.The application generates vibration through the energization of vibration assembly, and the vibration is gradually transmitted to the touch screen through the bottom wall and the side wall, and the whole touch screen vibrates accordingly;Compared with the prior art, the feedback area is increased, and the vibration uniformity of tactile feedback is improved.

Description

Technical Field

[0001] This invention relates to the field of human-computer interaction technology, and in particular to a haptic feedback device. Background Technology

[0002] Haptic feedback screens represent a significant innovation in human-computer interaction. By introducing physical vibrations or force feedback into touchscreens, they provide users with a more intuitive operating experience. This technology is widely used in devices such as smartphones, tablets, and car infotainment screens, greatly enhancing user perception and interaction efficiency.

[0003] In related technologies, touch screens generate haptic feedback primarily using linear vibration motors. However, vibration motors are relatively large, requiring a significant portion of the product design structure to be occupied, which contradicts the current concept of lightweight and thin design.

[0004] In the prior art, in order to achieve thinness and lightness, piezoelectric ceramics have begun to be used as vibration sources for touch feedback. For example, Chinese invention patent with publication number CN220419927U disclosed a tactile feedback structure and electronic device on January 30, 2024. It achieves vibration feedback by setting a piezoelectric component in the accommodating space between the touch panel and the fixed base, and by deforming the piezoelectric component in the pressing direction.

[0005] However, since the vibration feedback mentioned above only occurs in the deformation direction of the piezoelectric component and the feedback area is small, the vibration sensation is uneven throughout the touch panel, affecting the user experience. Summary of the Invention

[0006] In view of at least one of the above-mentioned technical problems, the present invention provides a haptic feedback device that employs structural improvements to enhance the uniformity of haptic feedback vibration.

[0007] According to a first aspect of the present invention, a haptic feedback device is provided, comprising:

[0008] A touchscreen for displaying and facilitating touch input;

[0009] The rear shell has a basin-shaped structure, including sidewalls that form a closed area and a bottom wall perpendicular to the sidewalls. The touch screen is connected to the top of the sidewalls, and the bottom wall has a receiving cavity.

[0010] The base is connected to the back cover and is used to support the back cover and the touch screen;

[0011] A vibration assembly is disposed within the receiving cavity of the rear housing;

[0012] There is a gap between the receiving cavity and the touch screen. The vibration component vibrates when powered on. The vibration of the vibration component is transmitted to the side wall through the bottom wall, and the side wall drives the entire touch screen to vibrate.

[0013] In some embodiments of the present invention, the bottom wall has a basin-like cavity facing away from the touch screen, the basin-like cavity including an arcuate plate connected to the bottom wall and a support plate connected to the arcuate plate and parallel to the touch screen, the receiving cavity being formed on the support plate.

[0014] In some embodiments of the present invention, the receiving cavity is formed within the pelvic cavity and is oriented toward the touch screen. The receiving cavity includes a side wall perpendicular to the support plate and a mounting plate connected to the side wall, and the vibration assembly is fixed on the mounting plate.

[0015] In some embodiments of the present invention, the mounting plate has reinforcing ribs on the side near the touch screen that are disposed toward the touch screen.

[0016] In some embodiments of the present invention, the vibration assembly includes a stop fixed on the mounting plate and a slider disposed opposite to the stop and movable toward or away from the stop. A deformable and bendable substrate is also fixed on the surface of the slider facing the stop, and a piezoelectric ceramic is also fixed on the surface of the substrate facing the stop. The other side of the piezoelectric ceramic is connected to the stop. The vibration of the piezoelectric ceramic causes the slider to move toward or away from the stop.

[0017] In some embodiments of the present invention, the slider has a groove on the surface facing the stop block for deforming the substrate, and the two ends of the substrate are fixed to the two sides of the groove.

[0018] In some embodiments of the present invention, the vibration assembly further includes a base fixed to the mounting plate, a slide rail fixed on the base, and the slider being slidably disposed on the slide rail.

[0019] In some embodiments of the present invention, the base has a first protrusion facing the slider at the end away from the stop, the slider has a second protrusion facing the base, and a compression spring is provided between the first protrusion and the second protrusion.

[0020] In some embodiments of the present invention, a screen driver board and a ceramic driver board are also fixed on the mounting plate.

[0021] In some embodiments of the present invention, a rear cover is fixedly connected to the support plate, and the base is connected to the rear cover.

[0022] The beneficial effects of the present invention are as follows: The present invention generates vibration by energizing the vibration component, and the vibration is gradually transmitted to the touch screen through the bottom wall and side wall, and the entire touch screen vibrates accordingly; compared with the prior art, the feedback area is increased and the uniformity of the tactile feedback is improved. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the haptic feedback device in an embodiment of the present invention;

[0025] Figure 2 This is an exploded view of the haptic feedback device in an embodiment of the present invention;

[0026] Figure 3 This is a rear view of the haptic feedback device in an embodiment of the present invention;

[0027] Figure 4 As described in the embodiments of the present invention Figure 3 Sectional view along the middle AA direction;

[0028] Figure 5 As described in the embodiments of the present invention Figure 4 A magnified view of a section at point B in the middle;

[0029] Figure 6 This is a schematic diagram of the rear shell structure in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the vibration component in an embodiment of the present invention;

[0031] Figure 8 As described in the embodiments of the present invention Figure 7 A magnified view of a section at point C;

[0032] Figure 9 This is a schematic diagram of the vibration component from another perspective in an embodiment of the present invention;

[0033] Figure 10 This is a cross-sectional view of the vibration component in an embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram illustrating two locations on the touchscreen where a finger presses, according to an embodiment of the present invention.

[0035] Figure 12As described in the embodiments of the present invention Figure 11 A schematic diagram of the vibration waveform after the middle finger presses point A;

[0036] Figure 13 As described in the embodiments of the present invention Figure 11 A schematic diagram of the vibration waveform after the middle finger presses on point B.

[0037] Explanation of reference numerals in the attached drawings: 1. Touch screen; 2. Back cover; 21. Side wall; 22. Bottom wall; 23. Basin; 23a. Arc plate; 23b. Support plate; 24. Receiving cavity; 24a. Side wall; 24b. Mounting plate; 24b1. Reinforcing rib; 3. Base; 4. Vibration assembly; 41. Stop; 42. Slider; 42a. Groove; 42b. Second protrusion; 43. Substrate; 44. Piezoelectric ceramic; 45. Base; 45a. First protrusion; 46. Slide rail; 47. Compression spring; 5. Screen driver board; 6. Ceramic driver board; 7. Back cover. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] 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.

[0040] 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.

[0041] like Figures 1 to 13The haptic feedback device shown includes: a touch screen 1, used for display and touch input, serving as the main interface for user interaction with the device. Here, the touch screen can be a back cover 2, with a basin-shaped structure, including side walls 21 forming a closed area and a bottom wall 22 perpendicular to the side walls 21. The touch screen 1 is connected to the top of the side walls 21, and the bottom wall 22 has a receiving cavity 24. A base 3, connected to the back cover 2, provides support for the back cover 2 and the touch screen 1, ensuring the overall stability of the device. A vibration assembly 4 is disposed within the receiving cavity 24 of the back cover 2. A gap exists between the receiving cavity 24 and the touch screen 1. When powered on, the vibration assembly 4 vibrates, and the vibration is transmitted through the bottom wall 22 to the side wall 21, causing the entire touch screen 1 to vibrate. Various connection methods are available; strong adhesives can be used to connect the components, as well as threaded or plug-in connections, etc., depending on specific usage requirements. It should be noted that the gap setting means that a certain gap is maintained between the receiving cavity 24 and the touch screen 1 to prevent the vibration component 4 from directly contacting the touch screen 1. This setting optimizes the vibration transmission path and ensures that the vibration is evenly transmitted to the entire screen through the side wall 21 of the back shell 2, thereby improving the quality and consistency of tactile feedback.

[0042] In the above embodiments, the present invention generates vibration by energizing the vibration component 4, and the vibration is gradually transmitted to the touch screen 1 through the bottom wall 22 and the side wall 21, and the entire touch screen 1 vibrates accordingly; compared with the prior art, the feedback area is increased and the uniformity of the tactile feedback is improved.

[0043] In embodiments of the present invention, to achieve a superior haptic feedback experience, such as Figure 4 and Figure 5 As shown, the bottom wall 22 has a basin 23 facing away from the touch screen 1. The basin 23 includes an arc-shaped plate 23a connected to the bottom wall 22 and a support plate 23b connected to the arc-shaped plate 23a and parallel to the touch screen 1. A receiving cavity 24 is formed on the support plate 23b. The basin 23 consists of two main parts: the arc-shaped plate 23a connected to the bottom wall 22 helps optimize the vibration transmission path and enhances the overall structural strength of the device; the support plate 23b connected to the arc-shaped plate 23a ensures the symmetry and stability of the internal structure of the device. The receiving cavity 24 is used to fix the vibration assembly 4. Through the combined structure of the arc-shaped plate 23a and the support plate 23b, vibration can be transmitted more effectively from the vibration assembly 4 to the screen, ensuring that the user feels consistent and comfortable tactile feedback.

[0044] Furthermore, in embodiments of the present invention, for the sake of a compact device structure, please continue to refer to... Figure 4 and Figure 5A receiving cavity 24 is formed within the basin cavity 23 and is oriented towards the touch screen 1. The receiving cavity 24 includes a side wall 24a perpendicular to the support plate 23b and a mounting plate 24b connected to the side wall 24a. The vibration assembly 4 is fixed to the mounting plate 24b. This arrangement brings the vibration assembly 4 closer to the touch screen 1, shortening the vibration transmission path. The side wall 24a serves to support and fix the vibration assembly 4; the mounting plate 24b, connected to the side wall 24a and located at the top of the receiving cavity 24, provides a plane for fixing the vibration assembly 4, ensuring that the vibration assembly 4 remains stable during operation. The combination of the side wall 24a and the mounting plate 24b within the receiving cavity 24 provides a stable working environment for the vibration assembly 4, preventing displacement or resonance caused by vibration.

[0045] In embodiments of the present invention, in order to improve structural strength, such as Figure 5 and Figure 6 As shown, the mounting plate 24b has reinforcing ribs 24b1 facing the touch screen 1 on its side. These reinforcing ribs 24b1, arranged towards the touch screen 1, can be raised strips or grid structures, distributed along the surface of the mounting plate 24b. While improving its resistance to bending and deformation, the reinforcing ribs 24b1 also more evenly distribute the vibration force generated by the vibration assembly 4, making the vibration transmitted to the side wall 24a, support plate 23b, and touch screen 1 more smoothly and uniformly.

[0046] In embodiments of the present invention, in order to achieve efficient tactile feedback, such as Figure 7 and Figure 8As shown, the vibration assembly 4 includes a stop 41 fixed on the mounting plate 24b and a slider 42 opposite to the stop 41 and movable toward or away from the stop 41. A deformable and bendable substrate 43 is fixed to the surface of the slider 42 facing the stop 41, and a piezoelectric ceramic 44 is fixed to the surface of the substrate 43 facing the stop 41. The other side of the piezoelectric ceramic 44 is connected to the stop 41. The vibration of the piezoelectric ceramic 44 causes the slider 42 to move toward or away from the stop 41. The stop 41, fixed to the mounting plate 24b, serves as a limiting structure for the movement of the slider. The slider 42 can move within a certain range relative to the stop 41. The movement of the slider 42 is driven by the vibration of the piezoelectric ceramic 44, thereby providing vibration feedback to the touch screen 1. The substrate 43, fixed to the side of the slider 42 near the stop 41, is deformable and bendable. The flexible design of the substrate 43 allows it to effectively transmit the strain and displacement generated by the piezoelectric ceramic 44 during vibration, thereby driving the slider 42 to move. When energized, the piezoelectric ceramic 44 vibrates, and this vibration is transmitted to the slider 42 via the substrate 43, causing the slider 42 to move towards or away from the stop 41. During operation, the piezoelectric ceramic 44 vibrates under the influence of the electric field. This vibration is transmitted to the slider 42 through the bending deformation of the substrate 43, driving the slider 42 to move relative to the stop 41. The movement of the slider 42 is transmitted layer by layer through the mounting plate 24b, side wall 24a, and support plate 23b, ultimately causing the touch screen 1 to vibrate. This design ensures sensitive and accurate tactile feedback, providing users with a high-quality interactive experience.

[0047] Based on the above embodiments, to prevent the substrate 43 from breaking or failing due to the restriction of the slider 42 or the stop 41, such as Figure 8 As shown, the slider 42 also has a groove 42a on the surface facing the stop 41 for the substrate 43 to deform. The two ends of the substrate 43 are fixed to both sides of the groove 42a. The groove 42a is located on the surface of the slider 42 facing the stop 41, that is, on the side that contacts the substrate 43 and the piezoelectric ceramic 44. The design of the groove 42a provides sufficient free deformation space for the substrate 43 during vibration, ensuring that the substrate 43 always remains within a reasonable deformation range during operation and avoiding stress concentration caused by vibration. The two ends of the substrate 43 are fixed to both sides of the groove 42a, which helps to improve the efficiency and stability of vibration transmission. During operation, when the piezoelectric ceramic 44 deforms under the action of an electric field, the substrate 43 bends accordingly; the two ends of the substrate 43 are fixed to both sides of the groove 42a, so that the bending deformation is concentrated in the middle area of ​​the groove 42a, ensuring that the deformation and vibration of the substrate 43 are uniformly and effectively transmitted to the slider 42; the slider 42 moves relative to the stop 41 during vibration, thereby driving the touch screen 1 to realize tactile feedback.

[0048] In embodiments of the present invention, in order to ensure the sliding trajectory of slider 42, such as Figure 9As shown, the vibration assembly 4 also includes a base 45, which is fixed to the mounting plate 24b. A slide rail 46 is fixed on the base 45, and the slider 42 is slidably mounted on the slide rail 46. The slide rail 46 is fixed to the base 45 and cooperates with the slider 42 to form a sliding guide structure. The slide rail 46 limits the movement range of the slider 42, prevents the slider 42 from deviating from the predetermined path, and ensures the stability of vibration transmission. When the piezoelectric ceramic 44 is energized and vibrates, the vibration force is transmitted to the slider 42 through the substrate 43. The slider 42 moves along the slide rail 46, thereby realizing the movement of approaching or moving away from the stop 41.

[0049] Based on the above embodiments, in order to enhance the dynamic performance and stability of the vibration component 4, such as... Figure 9 and Figure 10 As shown, the base 45 has a first protrusion 45a facing the slider 42 at the end away from the stop 41, and the slider 42 has a second protrusion 42b facing the base 45. A compression spring 47 is located between the first protrusion 45a and the second protrusion 42b. The first protrusion 45a is located at the end of the base 45 away from the stop 41, facing the slider 42, forming a fixed fulcrum. The second protrusion 42b is located on the slider 42, facing the base 45, opposite to the first protrusion 45a. The second protrusion 42b cooperates with the first protrusion 45a to provide a fixed point for the other end of the compression spring 47, ensuring that the spring is in a controlled state. During operation, when the piezoelectric ceramic 44 is energized and vibrates, the slider 42 moves along the slide rail 46, and the compression spring 47 is compressed or released along with the movement of the slider 42. When the slider 42 moves towards the stop 41, the spring is compressed; when the slider 42 moves away from the stop 41, the spring force pushes the slider 42 back to its original position. This cyclical motion, through the reaction force of the spring, makes the vibration transmitted to the touch screen 1 more smoothly and rhythmically. The compression spring 47, through periodic compression and release, further enhances the dynamic performance of the vibration component 4, making the vibration feedback of the touch screen 1 more powerful and uniform.

[0050] In embodiments of the present invention, in order to control the display of the touch screen 1 and the vibration of the piezoelectric ceramic 44, such as Figure 3As shown, a screen driver board 5 and a ceramic driver board 6 are also fixed on the mounting plate 24b. The screen driver board 5 is fixed on the mounting plate 24b and electrically connected to the touch screen 1. The screen driver board 5 receives external input signals and converts them into display signals to control the touch screen 1, realizing functions such as image display and touch feedback. The ceramic driver board 6 is also fixed on the mounting plate 24b and electrically connected to the piezoelectric ceramic 44 in the vibration assembly 4. The ceramic driver board 6 converts the input electrical signals into high-frequency voltage signals to control the piezoelectric ceramic 44, causing it to vibrate; it can also control the vibration frequency and amplitude of the piezoelectric ceramic 44 by adjusting the output signal, thereby achieving tactile feedback of different intensities and modes. It should be noted that after the screen driver board 5 is powered on, it detects a finger pressing different positions on the touch screen 1 and sends signals, such as... Figures 11 to 13 As shown, different pressing positions correspond to different frequencies and voltage vibration waveforms. Through integrated design, not only is the structure optimized, but the system's efficiency and maintainability are also improved.

[0051] In embodiments of the present invention, protection and fixation are provided for the device, such as... Figure 2 As shown, it also includes a rear cover 7 fixedly connected to the support plate 23b, and a base 3 connected to the rear cover 7. The rear cover 7 is fixedly installed on the support plate 23b, forming a closed structure together with the vibration assembly 4 and other internal components to prevent dust, moisture and other external factors from affecting the internal components. The rear cover 7 can be connected by screws, snap-fit, rubber pads, magnetic connection, etc. The base 3, through its connection with the rear cover 7, supports the weight of the entire device, ensuring the stability of the touch screen 1 and the vibration assembly 4 during operation.

[0052] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A haptic feedback device, characterized in that, include: A touchscreen for displaying and facilitating touch input; The rear shell has a basin-shaped structure, including sidewalls that form a closed area and a bottom wall perpendicular to the sidewalls. The touch screen is connected to the top of the sidewalls, and the bottom wall has a receiving cavity. The base is connected to the back cover and is used to support the back cover and the touch screen; A vibration assembly is disposed within the receiving cavity of the rear housing; There is a gap between the receiving cavity and the touch screen. The vibration component vibrates when powered on. The vibration of the vibration component is transmitted to the side wall through the bottom wall, and the side wall drives the entire touch screen to vibrate. The bottom wall has a basin-shaped cavity facing away from the touch screen. The basin-shaped cavity includes an arc-shaped plate connected to the bottom wall and a support plate connected to the arc-shaped plate and parallel to the touch screen. The receiving cavity is formed on the support plate. The receiving cavity is formed within the pelvic cavity and is oriented towards the touch screen. The receiving cavity includes a side wall perpendicular to the support plate and a mounting plate connected to the side wall. The vibration assembly is fixed on the mounting plate.

2. The tactile feedback device according to claim 1, characterized in that, The mounting plate also has reinforcing ribs on the side closest to the touch screen, which are positioned towards the touch screen.

3. The haptic feedback device according to claim 1, characterized in that, The vibration assembly includes a stop fixed on the mounting plate and a slider disposed opposite to the stop and movable toward or away from the stop. A deformable and bendable substrate is also fixed on the surface of the slider facing the stop, and a piezoelectric ceramic is also fixed on the surface of the substrate facing the stop. The other side of the piezoelectric ceramic is connected to the stop. The vibration of the piezoelectric ceramic causes the slider to move toward or away from the stop.

4. The tactile feedback device according to claim 3, characterized in that, The slider also has a groove on the surface facing the stop block for deforming the substrate, and the two ends of the substrate are fixed to the two sides of the groove.

5. The tactile feedback device according to claim 3, characterized in that, The vibration assembly also includes a base, which is fixed to the mounting plate. A slide rail is fixed on the base, and the slider is slidably disposed on the slide rail.

6. The haptic feedback device according to claim 5, characterized in that, The base has a first protrusion facing the slider at the end away from the stop, and the slider has a second protrusion facing the base. A compression spring is located between the first protrusion and the second protrusion.

7. The tactile feedback device according to claim 3, characterized in that, The mounting plate also has a screen driver board and a ceramic driver board fixed to it.

8. The haptic feedback device according to claim 7, characterized in that, It also includes a rear cover fixedly connected to the support plate, and the base is connected to the rear cover.

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