Touch feedback module and electronic device

Abstract

The present invention relates to a touch feedback module and an electronic device. The touch feedback module includes a pressing unit, a first elastic sheet, a piezoelectric unit, and an elastic bracket. The pressing unit and the piezoelectric unit are respectively arranged on opposite sides of the first elastic sheet, and the pressing unit is fixedly connected to the middle area of the first elastic sheet. The piezoelectric unit is fixedly connected to both ends of the first elastic sheet. There is a gap between the surface of the first elastic sheet adjacent to the piezoelectric unit except for the two ends connected to the piezoelectric unit and the piezoelectric unit. A part of the elastic bracket is connected to the side of the piezoelectric unit facing away from the first elastic sheet, and the other part is connected to a fixed position where the user presses the pressing unit. It can realize functions such as power-on, power-off, pressure sensing, and touch feedback, with relatively more functions, meeting the user's pursuit of achieving more functions for the same operation and having a better human-computer interaction experience. And it can absorb assembly tolerances, reduce the assembly requirements of the touch feedback module, thereby simplifying the overall machine design and improving the product yield.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a touch feedback module and an electronic device. Background Art

[0002] As people's awareness of information security protection increases, more and more display devices are adopting fingerprint recognition technology. In order to pursue better visual effects, the screen-to-body ratio of display devices is getting larger and larger, and full-screen displays have come into being.

[0003] At present, fingerprint recognition is integrated with the switch function key and is set on the side of the display device along with the switch function key. At this time, the display device has two structural modes. In mode one, the fingerprint recognition unit, the pot piece, and the switch button circuit board are stacked on the middle frame. In mode two, the fingerprint recognition unit and the pot piece are set on the same circuit board, and the pot piece is folded and fixed on the middle frame. However, the display devices of these two structural modes only include fingerprint recognition function and switch function, and the functions are relatively single, which cannot meet the user's pursuit of more functions for the same operation, and the human-computer interaction experience is poor. In addition, the vibration of the pot piece needs to be realized by a separate linear motor module, which leads to high assembly requirements, complex overall design, and low product yield. Summary of the invention

[0004] Based on this, it is necessary to provide a touch feedback module and electronic device to address the problems of single function and poor human-computer interaction experience.

[0005] A touch feedback module comprises a pressing unit, a first spring sheet, a piezoelectric unit and an elastic bracket, wherein the pressing unit and the piezoelectric unit are respectively arranged on opposite sides of the first spring sheet, and the pressing unit is fixedly connected to the middle area of ​​the first spring sheet, the piezoelectric unit and both ends of the first spring sheet are fixedly connected, and a gap is formed between the surface of the first spring sheet adjacent to the piezoelectric unit except for the two ends connected to the piezoelectric unit and the piezoelectric unit; a part of the elastic bracket is connected to a side of the piezoelectric unit away from the first spring sheet, and the other part is connected to a fixed position.

[0006] In the above touch feedback module, when a user presses the pressing unit, since the middle area of the pressing unit and the first elastic sheet are fixedly connected, the pressing force is transmitted to the first elastic sheet, causing the first elastic sheet to undergo an elongation deformation along the stacking direction perpendicular to the pressing unit and the first elastic sheet. Furthermore, the piezoelectric unit is driven to elongate and generates a voltage output through the direct piezoelectric effect. Different threshold values of the output voltage are used to correspond to functions such as power-on, power-off, and pressure sensing. At this time, the piezoelectric unit receives a voltage signal and generates a force effect through the inverse piezoelectric effect, driving the piezoelectric unit to undergo a contraction deformation along the stacking direction perpendicular to the pressing unit and the first elastic sheet, driving the first elastic sheet to contract along the stacking direction of the pressing unit and the first elastic sheet, and thus transmitting vibration to the pressing unit through the first elastic sheet, enabling the pressing unit to generate a displacement along the stacking direction of the pressing unit and the first elastic sheet to achieve touch feedback. Therefore, the above touch feedback module can achieve functions such as power-on, power-off, pressure sensing, and touch feedback, with relatively more functions, meeting the user's pursuit of achieving more functions with the same operation and having a better human-computer interaction experience. Moreover, the touch feedback module is fixed at a fixed position through an elastic bracket, and can absorb assembly tolerances, reducing the assembly requirements of the touch feedback module, thereby simplifying the overall machine design and improving the product yield.

[0007] In one embodiment, the elastic bracket includes a functional area, the functional area is fixedly connected to both ends of the piezoelectric unit connected to the first elastic sheet, and there is a gap between the surface of the functional area adjacent to the piezoelectric unit except for the part connected to the piezoelectric unit and the piezoelectric unit.

[0008] In the above touch feedback module, by defining that the functional area in the elastic bracket is fixedly connected to both ends of the piezoelectric unit connected to the first elastic sheet, the fixed connection between the elastic bracket and the piezoelectric unit is realized. By defining that there is a gap between the surface of the functional area adjacent to the piezoelectric unit except for the part connected to the piezoelectric unit and the piezoelectric unit, direct contact between the elastic bracket and the piezoelectric unit is avoided, thereby protecting the piezoelectric unit.

[0009] In one embodiment, the elastic bracket further includes a connection area, the connection area is disposed around the outside of the functional area, and is fixed to the fixed position.

[0010] In the above touch feedback module, by defining that the elastic bracket further includes a connection area disposed around the outside of the functional area, it is convenient to realize the connection between the elastic bracket and the fixed position.

[0011] In one embodiment, from both ends of the piezoelectric unit towards the middle, the gap between the functional area and the piezoelectric unit gradually increases, and the middle area of the functional area is fixedly connected to the fixed position.

[0012] The above touch feedback module fixes the middle area of the functional area to a fixed position, so as to facilitate the connection between the elastic bracket and the fixed position.

[0013] In one embodiment, the elastic bracket includes two elastic monomers spaced apart along a direction perpendicular to the lamination direction of the first elastic sheet and the piezoelectric unit. The two elastic monomers are disposed opposite to each other and are respectively connected to the ends of the piezoelectric unit and the first elastic sheet connected to the fixed position.

[0014] The above touch feedback module facilitates the connection between the elastic bracket, the piezoelectric unit and the fixed position by defining the structural form of the elastic bracket as two spaced-apart elastic monomers.

[0015] In one embodiment, the elastic bracket is connected to the piezoelectric unit through a second elastic sheet. The middle area of the second elastic sheet is connected to the elastic bracket, and both ends of the second elastic sheet are fixedly connected to the two ends of the piezoelectric unit connected to the first elastic sheet. There is a gap between the surface of the second elastic sheet adjacent to the piezoelectric unit except for the two ends connected to the piezoelectric unit and the piezoelectric unit.

[0016] The above touch feedback module can achieve the indirect connection between the elastic bracket and the piezoelectric unit by setting the second elastic sheet, and by defining a gap between the second elastic sheet and the piezoelectric unit to prevent the direct contact between the elastic bracket and the piezoelectric unit, thereby protecting the piezoelectric unit.

[0017] In one embodiment, the pressing unit includes a fingerprint recognition unit and a first rigid bracket. The first rigid bracket is a plate-like structure disposed between the middle areas of the fingerprint recognition unit and the first elastic sheet and is respectively connected to the middle areas of the fingerprint recognition unit and the first elastic sheet.

[0018] The above touch feedback module integrates the fingerprint recognition function by defining that the pressing unit includes a fingerprint recognition unit and a first rigid bracket, and the first rigid bracket can improve the support strength for the fingerprint recognition unit to ensure the stability of the overall structure.

[0019] In one embodiment, the touch feedback module further includes a second rigid bracket, wherein:

[0020] The second elastic sheet, the piezoelectric unit and the two ends of the first elastic sheet are sequentially stacked in the second rigid bracket, the second rigid bracket is provided with an opening corresponding to the middle area of ​​the first elastic sheet, the middle area of ​​the first elastic sheet protrudes from the opening, a side end surface of the first elastic sheet along the stacking direction is adjacent to the surface of the second rigid bracket and has a gap with the second rigid bracket, and the middle area of ​​the second elastic sheet is fixedly connected to the elastic bracket through the end of the second rigid bracket away from the opening;

[0021] Along the stacking direction of the fingerprint recognition unit and the first rigid support, the height of the first elastic sheet at a side away from the piezoelectric unit is greater than the height between the second rigid supports.

[0022] In the above-mentioned touch feedback module, a second rigid bracket is provided to limit the fingerprint recognition unit, the first rigid bracket, the first spring and the piezoelectric unit, so as to avoid a more obvious downward movement of the touch feedback module when pressed, so as to improve the user experience, and to avoid mutual friction between the piezoelectric unit and the elastic bracket when the piezoelectric unit is deformed along a stacking direction perpendicular to the pressing unit and the first spring, so as to protect the piezoelectric unit and improve the product yield.

[0023] In one of the embodiments, the first rigid bracket includes a support plate and an annular baffle, the annular baffle is arranged on a side of the support plate away from the fingerprint recognition unit, the first spring sheet and the fingerprint recognition unit are respectively arranged on both sides of the support plate, and the second rigid bracket is arranged in the annular baffle, and along a stacking direction perpendicular to the fingerprint recognition unit and the first rigid bracket, a gap is formed between the surface of the second rigid bracket adjacent to the annular baffle and the annular baffle.

[0024] In the above touch feedback module, the first rigid support is limited to include a support plate and an annular baffle, so as to reduce the shaking amplitude of the touch feedback module and improve the user experience.

[0025] In addition, the present invention further provides an electronic device, including a middle frame, and also including a touch feedback module as described in any of the above technical solutions, wherein the touch feedback module is arranged on the middle frame.

[0026] In the above electronic device, since the above touch feedback module can realize the functions of power on, power off, pressure sensing and touch feedback, it has relatively more functions, which meets the user's pursuit of more functions for the same operation, and the human-computer interaction experience is better; and the touch feedback module is fixed in a fixed position by an elastic bracket, and the assembly tolerance can be absorbed, the assembly requirements of the touch feedback module are reduced, and the whole machine design is simplified, and the product yield is improved. Therefore, the electronic device with the touch feedback module has more functions, lower assembly requirements, and higher product yield.

[0027] In one embodiment, when the touch feedback module has the first rigid bracket, the middle frame is provided with an opening window, the pressing unit group of the touch feedback module is embedded in the opening window of the middle frame, and the first rigid bracket is arranged inside the middle frame; the elastic bracket is arranged inside the middle frame, and the fixed position is the end part of the middle frame that is spaced apart from the opening window.

[0028] In the above-mentioned electronic device, by embedding the touch feedback module in the opening window of the middle frame, the overall thickness can be reduced, which is convenient for realizing thin and light. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of an electronic device provided by the present invention;

[0030] Figure 2 It is a schematic structural diagram of another electronic device provided by the present invention;

[0031] Figure 3 It is a schematic structural diagram of yet another electronic device provided by the present invention;

[0032] Figure 4 It is a schematic structural diagram of still another electronic device provided by the present invention;

[0033] Figure 5 It is a schematic structural diagram of another electronic device provided by the present invention;

[0034] Figure 6 It is a schematic structural diagram of yet another electronic device provided by the present invention;

[0035] Figure 7 It is a schematic structural diagram of still another electronic device provided by the present invention. Detailed Embodiments

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed embodiments of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0039] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0042] As Figure 1 shown, the present invention provides a touch feedback module 100, which includes a pressing unit 110, a first elastic sheet 120, a piezoelectric unit 130 and an elastic bracket 140. The pressing unit 110 and the piezoelectric unit 130 are respectively disposed on opposite sides of the first elastic sheet 120, and the middle region of the pressing unit 110 and the first elastic sheet 120 are fixedly connected by connection means such as fixing glue and double-sided tape. The two ends of the piezoelectric unit 130 and the first elastic sheet 120 are fixedly connected by connection means such as fixing glue and double-sided tape. There is a gap between the surface of the first elastic sheet 120 adjacent to the piezoelectric unit 130 except at both ends, so that the surface of the first elastic sheet 120 adjacent to the piezoelectric unit 130 except at the two ends connected to the piezoelectric unit 130 is spaced apart from the piezoelectric unit 130, for forming a deformation space of the first elastic sheet 120; a part of the elastic bracket 140 is connected to the side of the piezoelectric unit 130 facing away from the first elastic sheet 120, and another part of the elastic bracket 140 is connected to the fixed position 200, so that the elastic bracket 140 can play a buffering role and is used to absorb assembly tolerances.

[0043] In the above touch feedback module 100, when a user presses the pressing unit 110, since the middle area of the pressing unit 110 and the first elastic sheet 120 are fixedly connected, the pressing force is transmitted to the first elastic sheet 120, causing the first elastic sheet 120 to undergo an elongation deformation along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120. Furthermore, this drives the piezoelectric unit 130 to elongate and generate a voltage output through the direct piezoelectric effect. Different threshold values of the output voltage are used to correspond to functions such as power-on, power-off, and pressure sensing. At this time, the piezoelectric unit 130 receives the voltage signal and generates a force effect through the inverse piezoelectric effect, driving the piezoelectric unit 130 to undergo a contraction deformation along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120, driving the first elastic sheet 120 to contract along the stacking direction of the pressing unit 110 and the first elastic sheet 120. Thus, the vibration is transmitted to the pressing unit 110 through the first elastic sheet 120, enabling the pressing unit 110 to generate a displacement along the stacking direction of the pressing unit 110 and the first elastic sheet 120 to achieve touch feedback. Therefore, the above touch feedback module 100 can achieve functions such as power-on, power-off, pressure sensing, and touch feedback, with relatively more functions, meeting the user's pursuit of achieving more functions with the same operation and providing a better human-computer interaction experience. Moreover, the touch feedback module 100 is fixed to the fixed position 200 through the elastic support 140, and it can absorb assembly tolerances, reducing the assembly requirements of the touch feedback module 100, thereby simplifying the overall machine design and improving the product yield.

[0044] There are various structural forms of the elastic support 140, such as Figure 1 As shown in a preferred embodiment, the two ends of the elastic support 140 connected to the first elastic sheet 120 in the piezoelectric unit 130 are fixedly connected through connection methods such as fixing glue and double-sided tape. Moreover, there is a gap between the surface of the elastic support 140 adjacent to the piezoelectric unit 130 except for the two ends connected to the piezoelectric unit 130 and the piezoelectric unit 130, so that there is a spaced arrangement between the surface of the elastic support 140 adjacent to the piezoelectric unit 130 except for the two ends connected to the piezoelectric unit 130 and the piezoelectric unit 130, avoiding mutual friction between the piezoelectric unit 130 and the elastic support 140 when the piezoelectric unit 130 deforms along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120, protecting the piezoelectric unit 130, and improving the product yield.

[0045] In the above touch feedback module 100, during specific settings, such as Figure 1As shown, the elastic support 140 can be an integral structure, which has a functional area 141. The functional area 141 can be in a structural form similar to that of the first elastic piece 120, and is disposed opposite to the first elastic piece 120 on both sides of the piezoelectric unit 130. Both ends of the functional area 141 are fixedly connected to the two ends where the piezoelectric unit 130 is connected to the first elastic piece 120. There is a gap between the surface of the functional area 141 adjacent to the piezoelectric unit 130 and the piezoelectric unit 130 except for the two ends connected to the piezoelectric unit 130. There are two ways to connect the elastic support 140 to the fixed position 200, such as Figure 2 As shown, in one way, the fixed position 200 is located on the side of the functional area 141 away from the piezoelectric unit 130, and the functional area 141 is fixed on the fixed position 200, such as Figure 1 As shown, in the other way, the integral structure further has a connection area 142, which is disposed outside the functional area 141 and connected to the fixed position 200. And at this time, the fixed position 200 can be located on both sides of the touch feedback module 100. Of course, the structure of the elastic support 140 is not limited to this, and it can also be other structural forms that can meet the requirements. For example, such as Figure 3 and Figure 4 As shown, the elastic support 140 can also include two spaced elastic monomers 143. The two elastic monomers 143 are disposed opposite to each other, and there is a space between the two elastic monomers 143. One end of an elastic monomer 143 is fixed to one end of the piezoelectric unit 130 connected to the first elastic piece 120, and the other end of the elastic monomer 143 is fixed to a fixed position 200. One end of the other elastic monomer 143 is fixed to the other end of the piezoelectric unit 130 connected to the first elastic piece 120, and the other end of the elastic monomer 143 is fixed to another fixed position 200. And at this time, these two fixed positions 200 can be located on both sides of the touch feedback module 100, and these two fixed positions 200 can also be located on the side of the piezoelectric unit 130 away from the first elastic piece 120 and close to the middle area of the piezoelectric unit 130; For another example, such as Figure 5 As shown, the fixed position 200 is located on the side of the piezoelectric unit 130 away from the first elastic piece 120 and in the middle area of the piezoelectric unit 130. The piezoelectric unit 130 is connected to the fixed position 200 through the elastic support 140. At this time, the elastic support 140 can be a gasket.

[0046] To ensure the deformation space of the first elastic piece 120, specifically, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, from both ends of the self-piezoelectric unit 130 towards the middle, the gap between the first elastic sheet 120 and the piezoelectric unit 130 gradually increases. Correspondingly, from both ends of the self-piezoelectric unit 130 towards the middle, the gap between the first elastic sheet 120 and the pressing unit 110 gradually decreases, so as to adapt to the gradually increasing deformation space required for the first elastic sheet 120 from both ends towards the middle. Further, it can also be defined that from both ends of the self-piezoelectric unit 130 towards the middle in the integrated elastic bracket 140, the gap between the functional area 141 and the piezoelectric unit 130 gradually increases, so as to make the structure symmetrical and ensure the consistency of pressure sensing and the uniformity of touch feedback.

[0047] In the above touch feedback module 100, by defining the structural form of the gap, it is ensured that each part of the first elastic sheet 120 can vibrate up and down well. In specific settings, the gap between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the elastic bracket 140 can be exactly the same, the gap between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the elastic bracket 140 can be approximately the same, and the gap between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the elastic bracket 140 can also be different. The gap relationship between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the elastic bracket 140 is determined according to the actual situation of the touch feedback module 100.

[0048] There are various connection methods between the elastic bracket 140 and the piezoelectric unit 130, such as Figure 6 As shown, in a preferred embodiment, the elastic bracket 140 is connected to the piezoelectric unit 130 through the second elastic sheet 150. The middle area of the second elastic sheet 150 is connected to the elastic bracket 140 through connection methods such as fixing glue and double-sided tape. And both ends of the second elastic sheet 150 are fixedly connected to both ends of the piezoelectric unit 130 connected to the first elastic sheet 120 through connection methods such as fixing glue and double-sided tape. There is a gap between the surface of the second elastic sheet 150 adjacent to the piezoelectric unit 130 except at both ends and the piezoelectric unit 130.

[0049] In the above touch feedback module 100, the elastic bracket 140 supports the middle area of the second elastic sheet 150. Since there is a gap between the surface of the second elastic sheet 150 adjacent to the piezoelectric unit 130 except at both ends and the piezoelectric unit 130, the surface of the second elastic sheet 150 adjacent to the piezoelectric unit 130 except at both ends is spaced apart from the piezoelectric unit 130, so as to prevent the piezoelectric unit 130 from rubbing against the second elastic sheet 150 when deforming along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120, thereby protecting the piezoelectric unit 130 and improving the product yield. Specifically, from both ends of the piezoelectric unit 130 towards the middle, the gap between the second elastic sheet 150 and the piezoelectric unit 130 gradually increases, so as to make the structure symmetrical and ensure the consistency of pressure sensing and the uniformity of touch feedback. When specifically setting, the gap between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the second elastic sheet 150 can be exactly the same, the gap between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the second elastic sheet 150 can be approximately the same, and the gap between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the second elastic sheet 150 can also be different. The gap relationship between the piezoelectric unit 130 at the same position and the first elastic sheet 120 and the second elastic sheet 150 is determined according to the actual situation of the touch feedback module 100.

[0050] The pressing unit 110 can have various structural forms according to its function. For example, the pressing unit 110 can be a touchpad, which is fixedly connected to the middle area of the first elastic sheet 120. When a user presses the touchpad, the pressing force is transmitted to the first elastic sheet 120, causing the first elastic sheet 120 to undergo an elongation deformation along the stacking direction perpendicular to the touchpad and the first elastic sheet 120, and driving the piezoelectric unit 130 to elongate and generate a voltage output through the direct piezoelectric effect. Different threshold values of the output voltage are used to correspond to functions such as power on, power off, and pressure sensing. At this time, the piezoelectric unit 130 receives a voltage signal, generates a force effect through the inverse piezoelectric effect, drives the piezoelectric unit 130 to undergo a contraction deformation along the stacking direction perpendicular to the touchpad and the first elastic sheet 120, drives the first elastic sheet 120 to contract along the stacking direction of the touchpad and the first elastic sheet 120, and thus transmits the vibration to the touchpad through the first elastic sheet 120, enabling the touchpad to generate a displacement along the stacking direction of the touchpad and the first elastic sheet 120 to achieve touch feedback.

[0051] Of course, the pressing unit 110 can also have other structural forms according to its function. Specifically, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, the pressing unit 110 includes a fingerprint recognition unit 111 and a first rigid bracket 112. The first rigid bracket 112 is in a plate-like structure and is disposed between the fingerprint recognition unit 111 and the middle area of the first elastic sheet 120. And the first rigid bracket 112 is connected to the fingerprint recognition unit 111 through connection means such as fixing glue and double-sided tape. The first rigid bracket 112 is connected to the middle area of the first elastic sheet 120 through connection means such as fixing glue and double-sided tape.

[0052] In the above touch feedback module 100, by defining that the first rigid bracket 112 is elastically connected to the middle areas of the fingerprint recognition unit 111 and the first elastic sheet 120 respectively, so that the acting force can be transmitted among the fingerprint recognition unit 111, the first rigid bracket 112 and the first elastic sheet 120; by setting the first rigid bracket 112, the support strength for the fingerprint recognition unit 111 is improved to ensure the stability of the overall structure. When the user presses the fingerprint recognition unit 111, the fingerprint recognition unit 111 collects the fingerprint information of the user, and the pressing force is transmitted to the first elastic sheet 120, causing the first elastic sheet 120 to undergo an elongation deformation along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120. Furthermore, it drives the piezoelectric unit 130 to elongate and generates a voltage output through the direct piezoelectric effect. By different threshold values of the output voltage and integrating the fingerprint information, it corresponds to fingerprint recognition, power-on, power-off, and pressure sensing functions. At this time, the piezoelectric unit 130 receives the voltage signal, generates a force effect through the inverse piezoelectric effect, drives the piezoelectric unit 130 to undergo a contraction deformation along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120, drives the first elastic sheet 120 to contract along the stacking direction of the pressing unit 110 and the first elastic sheet 120, and thus transmits the vibration to the fingerprint recognition unit 111 and the first rigid bracket 112 through the first elastic sheet 120, enabling the fingerprint recognition unit 111 to generate a displacement along the stacking direction of the pressing unit 110 and the first elastic sheet 120 to achieve touch feedback. Therefore, the above touch feedback module 100 can realize functions such as fingerprint recognition, power-on, power-off, pressure sensing, and touch feedback, with relatively more functions, meeting the user's pursuit of achieving more functions for the same operation, and having a better human-computer interaction experience.

[0053] There are various connection methods between the elastic bracket 140 and the piezoelectric unit 130. More specifically, as Figure 7 shown, the touch feedback module 100 further includes a second rigid bracket 160. The second rigid bracket 160 is a cavity structure with one end open. The second rigid bracket 160 can be injection molded, and the second rigid bracket 160 can also be formed by bending a sheet. Among them:

[0054] The second spring piece 150, the piezoelectric unit 130 and the two ends of the first spring piece 120 are stacked in sequence in the second rigid bracket 160, the middle area of ​​the first spring piece 120 is arranged corresponding to the opening of the second rigid bracket 160, the middle area of ​​the first spring piece 120 protrudes from the opening of the second rigid bracket 160, there is a gap between the side end surface of the first spring piece 120 along the stacking direction and the second rigid bracket 160, and the middle area of ​​the second spring piece 150 is fixedly connected to the elastic bracket 140 through the end of the second rigid bracket 160 facing away from the opening. In the specific setting, there is a gap between the side end surface of the first spring piece 120 along the stacking direction and the second rigid bracket 160 when not pressed. There is a gap, and there is still a gap between the side end surface of the first spring sheet 120 along the stacking direction and the second rigid bracket 160 when the first spring sheet 120 has the largest variable, the middle area of ​​the first spring sheet 120 is fixedly connected to the first rigid bracket 112 by means of fixing glue, double-sided tape, etc., the two ends of the first spring sheet 120, the piezoelectric unit 130 and the second spring sheet 150 are arranged in the second rigid bracket 160, the second spring sheet 150 is fixedly connected to the middle area of ​​the end of the second rigid bracket 160 away from the opening by means of fixing glue, double-sided tape, etc., and the second rigid bracket 160 is fixedly connected to the elastic bracket 140 by means of fixing glue, double-sided tape, etc.;

[0055] Along the stacking direction of the fingerprint recognition unit 111 and the first rigid support 112, the height of the first elastic piece 120 on the side away from the piezoelectric unit 130 is greater than the height of the second rigid support 160, so that there is a gap between the surface of the second rigid support 160 adjacent to the first rigid support 112 and the first rigid support 112. In the specific setting, the height difference between the side of the first elastic piece 120 away from the piezoelectric unit 130 and the second rigid support 160 is related to the amplitude of the above-mentioned touch feedback module 100 and is determined according to the actual situation of the above-mentioned touch feedback module 100.

[0056] In the above touch feedback module 100, by providing the second rigid bracket 160 and defining that the height of the side of the first elastic sheet 120 facing away from the piezoelectric unit 130 is greater than the height of the second rigid bracket 160, a gap is formed between the surface of the second rigid bracket 160 adjacent to the first rigid bracket 112 and the first rigid bracket 112, so as to limit the fingerprint recognition unit 111, the first rigid bracket 112, the first elastic sheet 120 and the piezoelectric unit 130, preventing the touch feedback module 100 from having an obvious downward displacement feeling when being pressed, thereby improving the user experience. By defining that there is a gap between the side end surface of the first elastic sheet 120 in the stacking direction and the second rigid bracket 160, the side end surface of the first elastic sheet 120 in the stacking direction is always spaced from the second rigid bracket 160 during the pressing deformation process, preventing the two ends of the second elastic sheet 150, the piezoelectric unit 130 and the first elastic sheet 120 from colliding with the second rigid bracket 160 when deforming along the direction perpendicular to the stacking direction of the pressing unit 110 and the first elastic sheet 120, ensuring the smoothness of the touch feedback and improving the user experience.

[0057] Specifically, as Figure 7 shown, the first rigid bracket 112 includes a support plate 113 and an annular baffle 114. The annular baffle 114 is disposed on the side of the support plate 113 facing away from the fingerprint recognition unit 111. The first elastic sheet 120 and the fingerprint recognition unit 111 are respectively disposed on both sides of the support plate 113. The second rigid bracket 160 is disposed inside the annular baffle 114. Along the direction perpendicular to the stacking direction of the fingerprint recognition unit 111 and the first rigid bracket 112, there is a gap between the surface of the second rigid bracket 160 adjacent to the annular baffle 114 and the annular baffle 114.

[0058] In the above touch feedback module 100, by disposing the second rigid bracket 160 inside the annular baffle 114, the movement of the fingerprint recognition unit 111, the first rigid bracket 112, the first elastic sheet 120 and the piezoelectric unit 130 in the direction perpendicular to the stacking direction is limited, and by defining that there is a gap between the surface of the second rigid bracket 160 adjacent to the annular baffle 114 and the annular baffle 114, the annular baffle 114 can block the shaking of the second rigid bracket 160 in the direction perpendicular to the stacking direction of the fingerprint recognition unit 111 and the first rigid bracket 112, thereby ensuring the reliability of the touch feedback, and at the same time reducing the shaking amplitude of the touch feedback module 100 and improving the user experience. When specifically setting, the support plate 113 and the annular baffle 114 can be an integral structure. The support plate 113 and the annular baffle 114 are formed by injection molding, or the support plate 113 and the annular baffle 114 are formed by bending. Of course, the support plate 113 and the annular baffle 114 can also be fixed together by welding, snap connection and other means.

[0059] In addition, as Figure 1 、Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown in Figure 6 and Figure 7 , the present invention further provides an electronic device 10, including a middle frame 300, and further including the touch feedback module 100 in any one of the above embodiments. The touch feedback module 100 is disposed on the middle frame 300. The electronic device 10 includes, but is not limited to, devices such as laptop computers, mobile phones, and in-vehicle devices. For example, if the electronic device 10 is a laptop computer, the touch feedback module 100 is the input touch feedback module 100 of the laptop computer, also referred to as the PC touch feedback module 100.

[0060] In the above electronic device 10, since the touch feedback module 100 can implement functions such as fingerprint recognition, power-on, power-off, pressure sensing, and touch feedback, it has relatively many functions, meets the user's pursuit of achieving more functions for the same operation, has a good human-computer interaction experience, and can absorb assembly tolerances, reducing the assembly requirements for the touch feedback module 100, thereby simplifying the overall machine design and improving the product yield. Therefore, the electronic device 10 with the touch feedback module 100 has relatively many functions, low assembly requirements, high product yield, and good user experience.

[0061] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , in a preferred embodiment, when the touch feedback module 100 has a first rigid bracket 112, the middle frame 300 is provided with a window. The pressing unit 110 of the touch feedback module 100 is embedded in the window of the middle frame 300, and the first rigid bracket 112 of the touch feedback module 100 is disposed inside the middle frame 300. The elastic bracket 140 and the piezoelectric unit 130 are disposed inside the middle frame 300. At this time, the fixed position 200 is the end portion spaced from the window inside the middle frame 300.

[0062] In the above-mentioned electronic device 10, by embedding the touch feedback module 100 in the opening of the middle frame 300, the overall thickness is reduced, facilitating the realization of a thinner and lighter design. When a user presses the pressing unit 110, the pressing unit 110 moves downward within the opening. The pressing force is transmitted to the first elastic sheet 120 through the first rigid bracket 112, causing the first elastic sheet 120 to undergo an elongation deformation along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120. This in turn drives the piezoelectric unit 130 to elongate and generate a voltage output through the direct piezoelectric effect. Different threshold values of the output voltage are used to correspond to functions such as power-on, power-off, and pressure sensing. At this time, the piezoelectric unit 130 receives the voltage signal and generates a force effect through the inverse piezoelectric effect, driving the piezoelectric unit 130 to undergo a contraction deformation along the stacking direction perpendicular to the pressing unit 110 and the first elastic sheet 120, driving the first elastic sheet 120 to contract along the stacking direction of the pressing unit 110 and the first elastic sheet 120. Thus, the first elastic sheet 120 vibrates upward, and the vibration is transmitted to the pressing unit 110 through the first rigid bracket 112, enabling the pressing unit 110 to generate a displacement along the stacking direction of the pressing unit 110 and the first elastic sheet 120 to achieve touch feedback. Therefore, the above-mentioned touch feedback module 100 can implement functions such as power-on, power-off, pressure sensing, and touch feedback, with relatively more functions, meeting the user's pursuit of achieving more functions with the same operation and providing a better human-computer interaction experience. Moreover, the touch feedback module 100 is fixed at the fixed position 200 through the elastic bracket 140, and can absorb assembly tolerances, reducing the assembly requirements for the touch feedback module 100, thereby simplifying the overall machine design and improving the product yield. In specific settings, the projection of the first rigid bracket 112 on the middle frame 300 completely covers the opening of the middle frame 300 to play a role in shielding and limiting.

[0063] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0064] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A touch feedback module, characterized in that, The invention comprises a pressing unit, a first spring sheet, a piezoelectric unit and an elastic bracket, wherein the pressing unit and the piezoelectric unit are respectively arranged on opposite sides of the first spring sheet, and the pressing unit is fixedly connected to the middle area of ​​the first spring sheet, and the piezoelectric unit and the two ends of the first spring sheet are fixedly connected, and the first spring sheet has a gap between the surface adjacent to the piezoelectric unit and the piezoelectric unit except for the two ends connected to the piezoelectric unit, and the gap provides space for the first spring sheet to deform; a part of the elastic bracket is connected to a side of the piezoelectric unit away from the first spring sheet, and the other part is connected to a fixed position; the pressing unit is a touch panel; The elastic support is connected to the piezoelectric unit through a second elastic sheet, the middle area of ​​the second elastic sheet is connected to the elastic support, and the two ends of the second elastic sheet are fixedly connected to the two ends of the piezoelectric unit connected to the first elastic sheet, and the second elastic sheet has a gap between the surface adjacent to the piezoelectric unit and the piezoelectric unit except the two ends connected to the piezoelectric unit; The pressing unit includes a fingerprint recognition unit and a first rigid bracket, wherein the first rigid bracket is a plate-shaped structure, disposed between the fingerprint recognition unit and the middle area of ​​the first elastic sheet, and connected to the fingerprint recognition unit and the middle area of ​​the first elastic sheet respectively; Also included is a second rigid bracket, wherein: The second elastic sheet, the piezoelectric unit and the two ends of the first elastic sheet are sequentially stacked in the second rigid bracket, the second rigid bracket is provided with an opening corresponding to the middle area of ​​the first elastic sheet, the middle area of ​​the first elastic sheet protrudes from the opening, a side end surface of the first elastic sheet along the stacking direction is adjacent to the surface of the second rigid bracket and has a gap with the second rigid bracket, and the middle area of ​​the second elastic sheet is fixedly connected to the elastic bracket through the end of the second rigid bracket away from the opening; The elastic bracket includes a functional area, which is fixedly connected to two ends of the piezoelectric unit connected to the first elastic sheet, and a gap is formed between the surface of the functional area adjacent to the piezoelectric unit except the two ends connected to the piezoelectric unit and the piezoelectric unit.

2. The touch feedback module according to claim 1, wherein The elastic bracket also includes a connection area, which is arranged around the outside of the functional area and fixed at the fixed position.

3. The touch feedback module according to claim 1, characterized in that, From two ends of the piezoelectric unit toward the middle, the gap between the functional area and the piezoelectric unit gradually increases, and the middle area of ​​the functional area is fixedly connected to the fixed position.

4. The touch feedback module according to claim 1, wherein The elastic support includes two elastic monomers spaced apart in a direction perpendicular to the stacking direction of the first elastic sheet and the piezoelectric unit. The two elastic monomers are arranged opposite to each other and are respectively connected to the end of the piezoelectric unit connected to the first elastic sheet and the fixed position.

5. The touch feedback module according to claim 1, characterized in that, The first rigid bracket includes a support plate and an annular baffle, the annular baffle is arranged on a side of the support plate away from the fingerprint recognition unit, the first spring sheet and the fingerprint recognition unit are respectively arranged on both sides of the support plate, and the second rigid bracket is arranged in the annular baffle, along a stacking direction perpendicular to the fingerprint recognition unit and the first rigid bracket, a surface of the second rigid bracket adjacent to the annular baffle has a gap with the annular baffle.

6. An electronic device, including a middle frame, characterized in that, It also includes the touch feedback module according to any one of claims 1 to 5, wherein the touch feedback module is arranged on the middle frame.

Images