Tactile feedback device

Abstract

The invention relates to the technical field of man-machine interaction, in particular to a tactile feedback device, which comprises a touch screen, a touch control module, a display module and a control module, the rear shell is of a basin-shaped structure and comprises a side wall defining a closed area and a bottom wall perpendicular to the side wall, the touch screen is connected to the top of the side wall, and a containing cavity is formed in the bottom wall; the base is connected with the rear shell and used for supporting the rear shell and the touch screen; the vibration assembly is arranged in the accommodating cavity of the rear shell; wherein a gap is formed between the containing cavity and the touch screen, the vibration assembly generates vibration when powered on, vibration of the vibration assembly is transmitted to the side wall through the bottom wall, and the side wall drives the whole touch screen to vibrate. The vibration assembly is powered on and generates vibration, the vibration is gradually transmitted to the touch screen through the bottom wall and the side wall, and the whole touch screen vibrates along with the vibration assembly; compared with the prior art, the feedback area is increased, and the vibration sense uniformity of tactile feedback is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of human-computer interaction, and in particular to a tactile feedback device. Background Art

[0002] The tactile feedback screen is an important innovation in the field of human-computer interaction. It introduces physical vibration or force feedback into the touch screen to provide users with a more intuitive operating experience. This technology is widely used in devices such as smartphones, tablets, and car central control screens, greatly enhancing the user's operating perception and interaction efficiency.

[0003] In the related art, the touch screen basically generates tactile feedback by using a linear vibration motor. However, the vibration motor is large in size, which causes a large part of the structure to be occupied during the product design process, which is inconsistent with the existing concept of lightweight design.

[0004] In the prior art, in order to achieve lightness and thinness, piezoelectric ceramics are used as vibration sources for touch feedback. For example, the Chinese invention patent with publication number CN220419927U disclosed a tactile feedback structure and electronic device on January 30, 2024. A piezoelectric component is arranged in the accommodation space between the touch panel and the fixed seat, and vibration feedback is achieved by deformation of the piezoelectric component in the pressing direction.

[0005] However, since the above vibration feedback only occurs in the deformation direction of the piezoelectric component, the feedback area is small, which makes the vibration feeling of various parts of the touch panel uneven, affecting the user experience. Summary of the invention

[0006] In view of at least one of the above technical problems, the present invention provides a tactile feedback device, which adopts structural improvement to improve the vibration uniformity of tactile feedback.

[0007] According to a first aspect of the present invention, there is provided a tactile feedback device, comprising: Touch screen for display and touch input; The rear shell is in a basin-shaped structure, including side walls forming a closed area and a bottom wall perpendicular to the side walls, the touch screen is connected to the top of the side walls, and the bottom wall has a receiving cavity; A base, connected to the rear housing, and used to support the rear housing and the touch screen; A vibration component, disposed in the accommodation cavity of the rear shell; There is a gap between the accommodating cavity and the touch screen, the vibration component generates vibration 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.

[0008] In some embodiments of the present invention, the bottom wall has a pelvic cavity arranged away from the touch screen, the pelvic cavity includes an arc plate connected to the bottom wall and a support plate connected to the arc plate and parallel to the touch screen, and the accommodating cavity is formed on the support plate.

[0009] In some embodiments of the present invention, the accommodating cavity is formed in the pelvic cavity and is arranged in a direction close to the touch screen. The accommodating cavity includes a side wall arranged perpendicular to the support plate and a mounting plate connected to the side wall, and the vibration assembly is fixed on the mounting plate.

[0010] In some embodiments of the present invention, the surface of the mounting plate close to the touch screen further has a reinforcing rib disposed toward the touch screen.

[0011] In some embodiments of the present invention, the vibration component includes a stop block fixed on the mounting plate and a slider arranged opposite to the stop block and movable toward or away from the stop block, a deformable and bendable substrate is fixed on the surface of the slider facing the stop block, a piezoelectric ceramic is fixed on the surface of the substrate facing the stop block, the other surface of the piezoelectric ceramic is connected to the stop block, and the vibration of the piezoelectric ceramic drives the slider to approach or move away from the stop block.

[0012] In some embodiments of the present invention, the surface of the sliding block facing the stopper further comprises a groove for the substrate to be deformed, and two ends of the substrate are fixed on two sides of the groove.

[0013] In some embodiments of the present invention, the vibration assembly further comprises a base, the base is fixed on the mounting plate, a slide rail is fixed on the base, and the slider is relatively slidably arranged on the slide rail.

[0014] In some embodiments of the present invention, the base has a first protrusion disposed toward the slider on one end away from the stopper, the slider has a second protrusion disposed toward the base, and a compression spring is provided between the first protrusion and the second protrusion.

[0015] In some embodiments of the present invention, a screen driving board and a ceramic driving board are also fixed on the mounting board.

[0016] In some embodiments of the present invention, a back cover is further included which is fixedly connected to the support plate, and the base is connected to the back cover.

[0017] The beneficial effects of the present invention are as follows: the present invention energizes the vibration component and generates vibration, and the vibration is gradually transmitted to the touch screen through the bottom wall and the side walls, and the entire touch screen vibrates accordingly; compared with the prior art, the feedback area is increased and the vibration uniformity of the tactile feedback is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic structural diagram of a tactile feedback device in an embodiment of the present invention; Figure 2 An exploded schematic diagram of a tactile feedback device according to an embodiment of the present invention; Figure 3 is a rear view of the tactile feedback device in an embodiment of the present invention; Figure 4 In the embodiment of the present invention Figure 3 Sectional view along AA direction; Figure 5 In the embodiment of the present invention Figure 4 A partial enlarged view of point B in the middle; Figure 6 Schematic diagram of the structure of the rear housing in an embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of the vibration assembly in an embodiment of the present invention; Figure 8 In the embodiment of the present invention Figure 7 A partial enlarged view of point C in the middle; Fig. 9 A schematic structural diagram of a vibration assembly from another perspective in an embodiment of the present invention; Fig.10 is a cross-sectional view of a vibration assembly in an embodiment of the present invention; Fig.11 A schematic diagram of a finger pressing two positions on a touch screen in an embodiment of the present invention; Fig.12 In the embodiment of the present invention Fig.11 Schematic diagram of the vibration waveform after the middle finger presses point A; Fig.13 In the embodiment of the present invention Fig.11 Schematic diagram of the vibration waveform after the middle finger presses point B.

[0020] Explanation of the accompanying drawings: 1. touch screen; 2. back shell; 21. side wall; 22. bottom wall; 23. pelvic cavity; 23a. arc plate; 23b. support plate; 24. accommodating cavity; 24a. side wall; 24b. mounting plate; 24b1. reinforcing rib; 3. base; 4. vibration assembly; 41. block; 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 drive board; 6. ceramic drive board; 7. back cover. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] like Figures 1 to 13The tactile feedback device shown includes: a touch screen 1, which is used for display and touch input and is the main interface for user interaction with the device. The touch screen here can be a rear shell 2, which is a basin-shaped structure, including a side wall 21 that encloses a closed area and a bottom wall 22 that is perpendicular to the side wall 21. The touch screen 1 is connected to the top of the side wall 21, and the bottom wall 22 has a receiving cavity 24. The base 3 is connected to the rear shell 2 to provide support for supporting the rear shell 2 and the touch screen 1 to ensure the overall stability of the device. The vibration component 4 is arranged in the receiving cavity 24 of the rear shell 2. There is a gap between the receiving cavity 24 and the touch screen 1. The vibration component 4 generates vibration when powered on. The vibration of the vibration component 4 is transmitted to the side wall 21 through the bottom wall 22, and the side wall 21 drives the entire touch screen 1 to vibrate. There are various connection methods. Strong adhesives can be used to connect the components, and threaded connections or plug-in connections can also be used. It can be selected according to specific usage requirements. It should be noted here that the gap setting means that a certain gap is retained between the accommodating 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 rear shell 2, thereby improving the quality and consistency of tactile feedback.

[0025] In the above embodiment, the present invention energizes the vibration component 4 and generates vibration, 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 vibration uniformity of the tactile feedback is improved.

[0026] In an embodiment of the present invention, in order to achieve a high-quality tactile feedback experience, such as Figure 4 and Figure 5 As shown, the bottom wall 22 has a pelvic cavity 23 that is set away from the touch screen 1. The pelvic cavity 23 includes an arc plate 23a connected to the bottom wall 22 and a support plate 23b connected to the arc plate 23a and parallel to the touch screen 1. The accommodating cavity 24 is formed on the support plate 23b. The pelvic cavity 23 is composed of two main parts. The arc plate 23a is connected to the bottom wall 22, which helps to optimize the transmission path of the vibration and enhance the overall structural strength of the device; the support plate 23b is connected to the arc plate 23a to ensure the symmetry and stability of the internal structure of the device. The accommodating cavity 24 is used to fix the vibration component 4. Through the combined structure of the arc plate 23a and the support plate 23b, the vibration can be more effectively transmitted from the vibration component 4 to the screen, ensuring that the user feels consistent and comfortable tactile feedback.

[0027] Further, in the embodiment of the present invention, for the compactness of the device structure, please continue to refer to Figure 4 and Figure 5, the accommodating cavity 24 is formed in the pelvic cavity 23 and is arranged in a direction close to the touch screen 1. The accommodating cavity 24 includes a side wall 24a vertically arranged with the support plate 23b and a mounting plate 24b connected with the side wall 24a, and the vibration component 4 is fixed on the mounting plate 24b. This arrangement makes the vibration component 4 closer to the touch screen 1 and shortens the vibration transmission path. The side wall 24a plays a role in supporting and fixing the vibration component 4; the mounting plate 24b is connected to the side wall 24a and is located at the top of the accommodating cavity 24, providing a plane for fixing the vibration component 4 to ensure that the vibration component 4 remains stable during operation. The combination of the side wall 24a and the mounting plate 24b in the accommodating cavity 24 provides a stable working environment for the vibration component 4 to prevent displacement or resonance caused by vibration.

[0028] In the embodiment of the present invention, in order to improve the structural strength, as Figure 5 and Figure 6 As shown, the mounting plate 24b has a reinforcing rib 24b1 disposed toward the touch screen 1 on one side thereof close to the touch screen 1. The reinforcing rib 24b1 is disposed toward the touch screen 1 and may be a raised strip or grid structure, distributed along the surface of the mounting plate 24b. The reinforcing rib 24b1 not only improves its anti-bending and anti-deformation capabilities, but also more evenly disperses the vibration force generated by the vibration assembly 4, so that the vibration is transmitted to the side wall 24a, the support plate 23b and the touch screen 1 more smoothly and evenly.

[0029] In an embodiment of the present invention, in order to achieve efficient tactile feedback, Figure 7 and Figure 8As shown, the vibration assembly 4 includes a stopper 41 fixed on the mounting plate 24b and a slider 42 arranged opposite to the stopper 41 and movable toward or away from the stopper 41. A deformable and bendable substrate 43 is also fixed on the surface of the slider 42 facing the stopper 41. A piezoelectric ceramic 44 is also fixed on the surface of the substrate 43 facing the stopper 41. The other surface of the piezoelectric ceramic 44 is connected to the stopper 41. The vibration of the piezoelectric ceramic 44 drives the slider 42 to approach or move away from the stopper 41. The stopper 41 is fixed on the mounting plate 24b and serves as a limiting structure for the movement of the slider. The slider 42 can move within a certain range relative to the stopper 41. The movement of the slider 42 is driven by the vibration of the piezoelectric ceramic 44, and the vibration feedback of the touch screen 1 is realized through its movement. The substrate 43 is fixed on the side of the slider 42 close to the stopper 41 and has the characteristics of being deformable and bendable. The flexible design of the substrate 43 enables it to effectively transmit the strain and displacement generated by the piezoelectric ceramic 44 during the vibration process, thereby driving the slider 42 to move. The piezoelectric ceramic 44 vibrates after being energized, and is transmitted to the slider 42 through the substrate 43, pushing the slider 42 to move toward or away from the stopper 41. During operation, the piezoelectric ceramic 44 vibrates under the action of the electric field, and the vibration is transmitted to the slider 42 through the bending deformation of the substrate 43, driving the slider 42 to move relative to the stopper 41. The movement of the slider 42 is transmitted layer by layer through the mounting plate 24b, the side wall 24a and the support plate 23b, and finally drives the touch screen 1 to vibrate. This setting ensures sensitive and accurate tactile feedback, providing users with a high-quality interactive experience.

[0030] On the basis of the above-mentioned embodiment, in order to prevent the substrate 43 from being broken or failing due to the restriction of the slider 42 or the stopper 41, as shown in FIG. Figure 8 As shown, the surface of the slider 42 facing the stopper 41 also has a groove 42a for the substrate 43 to deform, and the two ends of the substrate 43 are fixed on both sides of the groove 42a. The groove 42a is set on the surface of the slider 42 facing the stopper 41, that is, the side in contact with the substrate 43 and the piezoelectric ceramic 44. The design of the groove 42a provides enough free deformation space for the substrate 43 during the vibration process, ensuring that the substrate 43 always remains within a reasonable deformation range during operation, avoiding stress concentration caused by vibration. The two ends of the substrate 43 are respectively fixed on both sides of the groove 42a, which helps to improve the efficiency and stability of vibration transmission. During operation, when the piezoelectric ceramic 44 is deformed by the electric field, the substrate 43 bends accordingly; the two ends of the substrate 43 are fixed on 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 evenly and effectively transmitted to the slider 42; the slider 42 moves relative to the stopper 41 during the vibration process, thereby driving the touch screen 1 to achieve tactile feedback.

[0031] In the embodiment of the present invention, in order to ensure the sliding track of the slider 42, as shown in FIG. Fig. 9As shown, the vibration assembly 4 also includes a base 45, which is fixed on the mounting plate 24b, and a slide rail 46 is fixed on the base 45, and the slider 42 can be relatively slidably arranged on the slide rail 46. The slide rail 46 is fixed on the base 45, and cooperates with the slider 42 to form a sliding guide structure. The slide rail 46 limits the moving 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 to generate vibration, the vibration force is transmitted to the slider 42 through the substrate 43, and the slider 42 moves along the slide rail 46, thereby achieving an approaching or moving away action with the stopper 41.

[0032] On the basis of the above embodiments, in order to enhance the dynamic performance and stability of the vibration assembly 4, as Fig. 9 and Fig.10 As shown, the end of the base 45 away from the stopper 41 has a first protrusion 45a arranged toward the slider 42, the slider 42 has a second protrusion 42b arranged toward the base 45, and a compression spring 47 is arranged between the first protrusion 45a and the second protrusion 42b. The first protrusion 45a is arranged at the end of the base 45 away from the stopper 41, facing the slider 42, forming a fixed fulcrum, and the second protrusion 42b is arranged on the slider 42, facing the base 45, opposite to the first protrusion 45a, and 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 to generate vibration, the slider 42 moves along the slide rail 46, and the compression spring 47 is compressed or released as the slider 42 moves; when the slider 42 moves toward the stopper 41, the spring is compressed; when the slider 42 moves away from the stopper 41, the elastic force of the spring pushes the slider 42 to reset; this cyclic movement transmits the vibration to the touch screen 1 more steadily and rhythmically through the reaction force of the spring. The compression spring 47 further enhances the dynamic performance of the vibration component 4 through periodic compression and release, making the vibration feedback of the touch screen 1 more powerful and uniform.

[0033] In the embodiment of the present invention, in order to control the display of the touch screen 1 and the vibration of the piezoelectric ceramic 44, as shown in FIG. 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 is electrically connected to the touch screen 1. The screen driver board 5 receives external input signals and converts them into display signals for controlling the touch screen 1 to realize functions such as image and touch feedback. The ceramic driver board 6 is also fixed on the mounting plate 24b and is electrically connected to the piezoelectric ceramic 44 in the vibration component 4. The ceramic driver board 6 converts the input electrical signal into a high-frequency voltage signal for controlling the piezoelectric ceramic 44 to cause it to vibrate; the vibration frequency and amplitude of the piezoelectric ceramic 44 can also be controlled by adjusting the output signal, thereby realizing tactile feedback of different intensities and modes. It should be noted here that after the screen driver board 5 is powered on, it detects that the finger presses on different positions of the touch screen 1 and sends a signal, such as Figures 11 to 13 As shown in the figure, different pressing positions correspond to different vibration waveforms of frequency and voltage. The integrated setting not only optimizes the structure, but also improves the efficiency and maintainability of the system.

[0034] In an embodiment of the present invention, the device is provided with protection and fixation, such as Figure 2 As shown, the back cover 7 is also included, which is fixedly connected to the support plate 23b, and the base 3 is connected to the back cover 7. The back cover 7 is fixedly connected to the support plate 23b, and together with the vibration component 4 and other internal components, it forms a closed structure to prevent dust, moisture and other external factors from affecting the internal components. The connection method of the back cover 7 can be selected from screw connection, snap connection, rubber pad, magnetic connection, etc. The base 3 supports the weight of the entire device by connecting to the back cover 7, ensuring the stability of the touch screen 1 and the vibration component 4 when working.

[0035] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tactile feedback device, characterized in that: include: Touch screen for display and touch input; The rear shell is in a basin-shaped structure, including side walls forming a closed area and a bottom wall perpendicular to the side walls, the touch screen is connected to the top of the side walls, and the bottom wall has a receiving cavity; A base, connected to the rear housing, and used to support the rear housing and the touch screen; A vibration component, disposed in the accommodation cavity of the rear shell; There is a gap between the accommodating cavity and the touch screen, the vibration component generates vibration 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.

2. The tactile feedback device according to claim 1, characterized in that: The bottom wall has a basin arranged away from the touch screen, the basin includes an arc plate connected to the bottom wall and a support plate connected to the arc plate and parallel to the touch screen, and the accommodating cavity is formed on the support plate.

3. The tactile feedback device according to claim 2, characterized in that: The accommodating cavity is formed in the pelvic cavity and is arranged in a direction close to the touch screen. The accommodating cavity includes a side wall vertically arranged with the support plate and a mounting plate connected with the side wall. The vibration component is fixed on the mounting plate.

4. The tactile feedback device according to claim 3, characterized in that: The surface of the mounting plate close to the touch screen also has a reinforcing rib arranged toward the touch screen.

5. The tactile feedback device according to claim 3, characterized in that: The vibration component includes a stopper fixed on the mounting plate and a slider arranged opposite to the stopper and movable toward or away from the stopper, a deformable and bendable substrate is fixed on the surface of the slider facing the stopper, a piezoelectric ceramic is fixed on the surface of the substrate facing the stopper, the other surface of the piezoelectric ceramic is connected to the stopper, and the vibration of the piezoelectric ceramic drives the slider to approach or move away from the stopper.

6. The tactile feedback device according to claim 5, characterized in that: The sliding block is also provided with a groove for the substrate to be deformed on the surface facing the stopper, and two ends of the substrate are fixed on two sides of the groove.

7. The tactile feedback device according to claim 5, characterized in that: The vibration component also includes a base, which is fixed on the mounting plate. A slide rail is fixed on the base, and the slider can be relatively slidably arranged on the slide rail.

8. The tactile feedback device according to claim 7, characterized in that: The base has a first protrusion disposed toward the slider on one end away from the stopper, the slider has a second protrusion disposed toward the base, and a compression spring is disposed between the first protrusion and the second protrusion.

9. The tactile feedback device according to claim 5, characterized in that: A screen driving board and a ceramic driving board are also fixed on the mounting plate.

10. The tactile feedback device according to claim 9, characterized in that: It also includes a back cover fixedly connected to the support plate, and the base is connected to the back cover.

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