Key piezoelectric feedback assembly

Abstract

The utility model discloses a key piezoelectric feedback subassembly, including from top to bottom place's upper casing, piezoelectric ceramic sensor execution subassembly, piezoelectric ceramic subassembly, PCB electronic circuit board, lower casing, PCB electronic circuit board is used for integrated signal processing circuit, and connects external MCU control module, piezoelectric ceramic subassembly is fixed in PCB electronic circuit board top, is used for receiving mechanical stress and converts into electric signal, and response electric signal produces vibration feedback, piezoelectric ceramic sensor execution subassembly is mechanically coupled with piezoelectric ceramic subassembly, is used for delivering user press force to piezoelectric ceramic subassembly, and will vibrate through PCB electronic circuit board feedback delivery to user operation surface, still circumferential array is equipped with elastic support structure between upper casing and lower casing, is used for providing press reset function and maintaining the contact pressure of piezoelectric ceramic sensor execution subassembly and piezoelectric ceramic subassembly, the utility model has the advantages of low power consumption, response time is fast, reliability is high, and the good advantage of flexibility.

Description

Technical Field

[0001] This utility model relates to the field of tactile feedback technology, and in particular to a button piezoelectric feedback component. Background Technology

[0002] In consumer electronics devices such as smartphones and tablets, as well as in-vehicle touch panels and steering wheel feedback systems, button feedback systems are used, primarily consisting of mechanical buttons and linear motors.

[0003] However, mechanical buttons have a short lifespan, large size, and poor environmental adaptability; linear motors have high energy consumption, response delay, and weak local feedback. Utility Model Content

[0004] The purpose of this invention is to provide a button piezoelectric feedback component, which has the advantages of low power consumption, fast response time, high reliability, and good flexibility.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A button piezoelectric feedback component includes, from top to bottom, an upper housing, a piezoelectric ceramic sensor actuation component, a piezoelectric ceramic component, a PCB electronic circuit board, and a lower housing;

[0007] PCB electronic circuit board, used to integrate signal processing circuits and connect to external MCU control modules;

[0008] Piezoelectric ceramic components are fixed to the top of the PCB electronic circuit board to receive mechanical stress and convert it into electrical signals, as well as generate vibration feedback in response to electrical signals.

[0009] The piezoelectric ceramic sensor actuator is mechanically coupled to the piezoelectric ceramic component to transmit the user's pressing force to the piezoelectric ceramic component and to transmit the vibration back to the user's operating surface via the PCB electronic circuit board.

[0010] Between the upper and lower housings, there are several elastic support structures arranged in a circumferential array to provide a press-to-reset function and maintain the contact pressure between the piezoelectric ceramic sensor actuator and the piezoelectric ceramic assembly.

[0011] The preferred solution is as follows:

[0012] Preferably, the cross-sections of the upper shell and the lower shell are both circular. The top outer circumference of the lower shell has four circular perforations. The bottom of the lower shell has a first clearance groove corresponding to the position of the four circular perforations. The top of the lower shell has a second clearance groove corresponding to the position of the four circular perforations.

[0013] The bottom of the upper housing is provided with threaded holes corresponding to the four circular through holes, and the bottom of the upper housing is provided with a third clearance groove corresponding to the four threaded holes.

[0014] Each elastic support structure includes bolts and springs;

[0015] Each of the circular through holes is fitted with a bolt that slides in, and each bolt is threadedly connected to its corresponding threaded hole. The bolt head of each bolt is located in the first clearance groove, and each bolt is fitted with a spring. The upper end of each spring is located in the third clearance groove, and the lower end of each spring is located in the second clearance groove.

[0016] Preferably, the cross-section of each of the second relief grooves is fan-shaped, and each of the second relief grooves is connected to the outer side wall of the lower housing.

[0017] In summary, this utility model has the following beneficial effects:

[0018] 1. By setting up piezoelectric ceramic components, energy can be consumed only during feedback, i.e. during pulse drive, without the need for continuous power supply, thus achieving low power consumption.

[0019] 2. By using piezoelectric ceramic sensor components and setting up piezoelectric ceramic components, the inverse application of the piezoelectric effect and the physical property of converting electrical energy into mechanical energy determine its microsecond-level deformation capability. Without the need for an electromagnetic conversion process, it can achieve a rapid response effect.

[0020] 3. By using piezoelectric ceramic sensor actuators and setting up piezoelectric ceramic components, and eliminating mechanical wear through solid-state coupling structures, high reliability can be achieved;

[0021] 4. The upper and lower shells can be customized to fit different orientations, achieving a high degree of flexibility in use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structural design of the embodiment;

[0023] Figure 2 This is a partial cross-sectional view of an embodiment.

[0024] In the diagram, 1 is the upper housing; 2 is the piezoelectric ceramic sensor actuator; 3 is the piezoelectric ceramic assembly; 4 is the PCB electronic circuit board; 5 is the lower housing; 6 is the elastic support structure; 7 is the bolt; and 8 is the spring. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings.

[0027] A piezoelectric feedback component for buttons, such as Figure 1 , Figure 2 As shown, the structure includes, from top to bottom, an upper housing 1, a piezoelectric ceramic sensor actuation assembly 2, a piezoelectric ceramic assembly 3, a PCB electronic circuit board 4, and a lower housing 5.

[0028] PCB electronic circuit board 4 is used to integrate signal processing circuits and connect to an external MCU control module;

[0029] The piezoelectric ceramic component 3 is fixed on the top of the PCB electronic circuit board 4. It is used to receive mechanical stress and convert it into electrical signals, and to generate vibration feedback in response to electrical signals. Piezoelectric ceramic is a functional material based on the piezoelectric effect, which can realize the mutual conversion of electrical energy and mechanical energy. Its core effects include the positive piezoelectric effect, mechanical stress-induced charge generation and the inverse piezoelectric effect, and electric field-induced lattice deformation to generate mechanical vibration.

[0030] The piezoelectric ceramic sensor actuator 2 is mechanically coupled to the piezoelectric ceramic component 3. It is used to transmit the user's pressing pressure to the piezoelectric ceramic component 3 and to transmit the vibration back to the user's operating surface through the PCB electronic circuit board 4. The piezoelectric ceramic actuator specifically refers to the device driven by the inverse piezoelectric effect, such as the piezoelectric ceramic actuator, which controls small displacements by applying an alternating electric field.

[0031] Both the piezoelectric ceramic sensor actuator 2 and the piezoelectric ceramic assembly 3 are existing technologies and will not be described in detail here.

[0032] Between the upper housing 1 and the lower housing 5, there are also several elastic support structures 6 arranged in a circumferential array to provide a press reset function and maintain the contact pressure between the piezoelectric ceramic sensor actuator 2 and the piezoelectric ceramic assembly 3.

[0033] Both the upper shell 1 and the lower shell 5 have circular cross-sections. The top outer side of the lower shell 5 has four circular perforations arranged in a circular array. The bottom of the lower shell 5 has a first clearance groove corresponding to the position of the four circular perforations. The top of the lower shell 5 has a second clearance groove corresponding to the position of the four circular perforations.

[0034] The bottom of the upper housing 1 is provided with threaded holes corresponding to the positions of the four circular through holes, and the bottom of the upper housing 1 is provided with a third clearance groove corresponding to the positions of the four threaded holes.

[0035] Each elastic support structure 6 includes a bolt 7 and a spring 8;

[0036] Each circular through hole has a bolt 7 slidably inserted into it, and each bolt 7 is threadedly connected to its corresponding threaded hole. The bolt head of each bolt 7 is located in the first clearance groove. Each bolt 7 is fitted with a spring 8, the upper end of each spring 8 is located in the third clearance groove, and the lower end of each spring 8 is located in the second clearance groove.

[0037] Each second relief groove has a fan-shaped cross-section, and each second relief groove is connected to the outer side wall of the lower housing 5.

[0038] Specific implementation process:

[0039] The PCB electronic circuit board 4 is fixed to the center area of ​​the lower housing 5, and the signal processing circuit is soldered onto the piezoelectric ceramic component 3 by bonding it with conductive adhesive; the piezoelectric ceramic sensor actuation component 2 is aligned with the piezoelectric ceramic component 3, and solid-state mechanical coupling is achieved by epoxy resin; the surface of the piezoelectric ceramic sensor actuation component 2 is polished to ensure force transmission efficiency.

[0040] Four bolts 7 are inserted into the circular through holes of the lower housing 5 respectively, with the bolt head of each bolt 7 located in the first clearance groove; a spring 8 is fitted onto each bolt 7, with the lower end of the spring 8 located in the fan-shaped space of the second clearance groove.

[0041] Align the four threaded holes of the upper housing 1 with the four bolts 7 of the lower housing 5, rotate the four bolts 7 so that the upper end of the spring 8 is inserted into the third clearance groove of the upper housing 1, the spring 8 is compressed, and a preload of 0.5N is provided to maintain the contact pressure.

[0042] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A button piezoelectric feedback component, characterized in that: The components are arranged from top to bottom as follows: upper housing (1), piezoelectric ceramic sensor actuation assembly (2), piezoelectric ceramic assembly (3), PCB electronic circuit board (4), and lower housing (5); PCB electronic circuit board (4) is used to integrate signal processing circuits and connect to an external MCU control module; The piezoelectric ceramic component (3) is fixed on the top of the PCB electronic circuit board (4) to receive mechanical stress and convert it into an electrical signal, and to generate vibration feedback in response to the electrical signal; The piezoelectric ceramic sensor actuator (2) is mechanically coupled to the piezoelectric ceramic assembly (3) to transmit the user's pressing force to the piezoelectric ceramic assembly (3) and to transmit the vibration back to the user's operating surface via the PCB electronic circuit board (4); Several elastic support structures (6) are arranged in a circumferential array between the upper housing (1) and the lower housing (5) to provide a press reset function and maintain the contact pressure between the piezoelectric ceramic sensor actuator (2) and the piezoelectric ceramic assembly (3).

2. The piezoelectric feedback component for a button according to claim 1, characterized in that: The cross-sections of the upper shell (1) and the lower shell (5) are both circular. Four circular perforations are arranged in a circular array on the outer side of the top of the lower shell (5). A first clearance groove is provided at the bottom of the lower shell (5) corresponding to the position of the four circular perforations. A second clearance groove is provided at the top of the lower shell corresponding to the position of the four circular perforations. The bottom of the upper housing (1) is provided with threaded holes corresponding to the positions of the four circular through holes, and the bottom of the upper housing is provided with a third clearance groove corresponding to the positions of the four threaded holes. Each elastic support structure (6) includes a bolt (7) and a spring (8); Each of the circular through holes is slidably inserted with a bolt (7), each bolt (7) is threadedly connected to its corresponding threaded hole, the bolt head of each bolt (7) is located in the first relief groove, each bolt (7) is fitted with a spring (8), the upper end of each spring (8) is located in the third relief groove, and the lower end of each spring (8) is located in the second relief groove.

3. A button piezoelectric feedback component according to claim 2, characterized in that: Each of the second relief grooves has a fan-shaped cross-section, and each of the second relief grooves is connected to the outer wall of the lower housing (5).

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