CN204928795U - Vibration feedback keying circuit , button and door handle switch - Google Patents

Abstract

The utility model discloses a vibration feedback button circuit, a button and a door handle switch. The button circuit comprises: a piezoelectric ceramic sheet J1 for generating a pulse signal when pressed, a signal acquisition circuit for collecting the pulse signal, and a A signal feedback circuit for generating an AC pulse signal from the pulse signal and feeding it back to the piezoelectric ceramic sheet J1 to cause the piezoelectric ceramic sheet J1 to vibrate. The technical scheme of the utility model adopts the piezoelectric ceramic sheet as the main body of the button. When pressed, the piezoelectric ceramic sheet generates high voltage, which is collected through the circuit, and then outputs a waveform to make the piezoelectric ceramic sheet vibrate, simulating the mechanical button when it is pressed. Due to the use of piezoelectric ceramics, the input and output voltage is relatively high, so the anti-interference ability is very high.

Description

A vibration feedback key circuit, key and door handle switch

technical field

The utility model relates to the technical field of flat buttons, in particular to a vibration feedback button circuit, a button and a door handle switch.

Background technique

The current flat keys are generally capacitive, and key signals are collected by detecting changes in capacitance. When the finger is pressed on the key, the capacitance changes, thereby collecting the key signal. However, this kind of button has poor anti-interference ability and cannot be applied to automobiles.

Utility model content

The purpose of the utility model is to propose a vibration feedback button circuit, a button and a door handle switch, aiming to solve the problem of how to realize the flat button with high anti-interference ability.

For this purpose, the utility model adopts the following technical solutions:

In the first aspect, a vibration feedback button circuit includes a piezoelectric ceramic sheet J1 for generating a pulse signal when pressed, a signal acquisition circuit for collecting the pulse signal, and a feedback circuit for generating an AC pulse signal from the pulse signal. Give the piezoelectric ceramic sheet J1 a signal feedback circuit to make the piezoelectric ceramic sheet J1 vibrate, the output end of the signal acquisition circuit is connected to the input end of the signal feedback circuit, and one end of the piezoelectric ceramic sheet J1 is connected to the signal acquisition circuit respectively. The input end is connected to the output end of the signal feedback circuit, and the other end of the piezoelectric ceramic sheet J1 is grounded.

Preferably, the signal feedback circuit includes a processor that generates an AC pulse signal from the pulse signal and a feedback control circuit that feeds the AC pulse signal back to the piezoelectric ceramic sheet J1 so that the piezoelectric ceramic sheet J1 vibrates .

Preferably, the signal feedback circuit includes a processor for generating AC pulse signals of different shapes from the pulse signal.

Preferably, the signal acquisition circuit includes a first resistor, a second resistor and a voltage regulator tube D1, one end of the first resistor is connected to the other end of the piezoelectric ceramic sheet J1, and the other end of the first resistor It is connected with the cathode of D1 and one end of the second resistor, and the anode of D1 and the other end of the second resistor are connected with signal ground.

Preferably, the feedback control circuit includes a third resistor, a fourth resistor, a fifth resistor, and transistors Q1 and Q2, one end of the fifth resistor is connected to the processor, and the other end of the fifth resistor is connected to the processor. The base of the Q2 is connected, the emitter of the Q2 is connected to the signal ground, the collector of the Q2 is connected to one end of the third resistor, and the other end of the third resistor is connected to one end of the fourth resistor 1. The base of the Q1 is connected, the other end of the fourth resistor is connected to the power supply terminal VBAT and the emitter of the Q1, and the collector of the Q1 is connected to the other end of the piezoelectric ceramic sheet J1.

In a second aspect, a button includes the circuit provided in the first aspect and a button panel, and the piezoelectric ceramic sheet J1 is installed under the button panel.

Preferably, the key panel includes a metal panel or a plastic panel.

In a third aspect, a door handle switch includes the button provided in the second aspect.

The utility model provides a vibration feedback button circuit, a button and a door handle switch. The button circuit includes a piezoelectric ceramic sheet J1 for generating a pulse signal when pressed, a signal acquisition circuit for collecting the pulse signal, and a The AC pulse signal generated by the pulse signal is fed back to the piezoelectric ceramic sheet J1 to make the piezoelectric ceramic sheet J1 vibrate. The signal feedback circuit adopts the piezoelectric ceramic sheet as the main body of the button. High voltage, collected through the circuit, and then output a waveform to vibrate the piezoelectric ceramic sheet, simulating the feeling of the mechanical button when it is pressed. Due to the use of piezoelectric ceramic sheet, the input and output voltage is high, so the anti-interference ability is very high.

Description of drawings

Fig. 1 is a structural schematic diagram of a vibration feedback button circuit provided by the utility model;

Fig. 2 is a structural representation of a signal feedback circuit provided by the utility model;

Fig. 3 is a structural schematic diagram of a vibration feedback button circuit provided by the utility model.

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a vibration feedback button circuit provided by the present invention. The vibration feedback button circuit 101 includes a piezoelectric ceramic sheet J1 for generating a pulse signal when pressed, a signal acquisition circuit 102 for collecting the pulse signal, and a signal acquisition circuit 102 for generating an AC pulse signal from the pulse signal to feed back to the pressure button. The electric ceramic sheet J1 is the signal feedback circuit 103 that makes the piezoelectric ceramic sheet J1 vibrate, the output end of the signal acquisition circuit 102 is connected with the input end of the signal feedback circuit 103, and one end of the piezoelectric ceramic sheet J1 is respectively connected to the signal acquisition circuit 102 The input end is connected to the output end of the signal feedback circuit 103, and the other end of the piezoelectric ceramic sheet J1 is grounded.

Among them, the functions performed by the piezoelectric ceramic chip J1, the signal acquisition circuit 102, and the signal feedback circuit 103 can be realized by circuit units composed of electronic components.

Specifically, refer to FIG. 2 , which is a schematic structural diagram of a signal feedback circuit provided by the present invention.

The signal feedback circuit 103 includes a processor 201 for generating an AC pulse signal from the pulse signal and a feedback control circuit 202 for feeding back the AC pulse signal to the piezoelectric ceramic sheet J1 so that the piezoelectric ceramic sheet J1 vibrates .

Preferably, the signal feedback circuit 103 includes a processor for generating AC pulse signals of different shapes from the pulse signal.

Wherein, the piezoelectric ceramic piezoelectric ceramic sheet J1 generates a pulse signal after receiving a button command triggered by the user, and the processor 201 filters the pulse signal, and the processor outputs an AC pulse signal. The specific implementation manner of the processor 201 can be realized by existing technologies, that is, all can be realized by circuit units composed of existing electronic components.

Specifically, refer to FIG. 3 , which is a schematic structural diagram of a vibration feedback button circuit provided by the present invention.

The signal acquisition circuit 102 includes a first resistor, a second resistor and a voltage regulator tube D1, one end of the first resistor is connected to the other end of the piezoelectric ceramic sheet J1, and the other end of the first resistor is connected to the D1 The cathode of D1 is connected to one end of the second resistor, and the anode of D1 is connected to the signal ground with the other end of the second resistor.

The feedback control circuit 202 includes a third resistor, a fourth resistor, a fifth resistor, and transistors Q1 and Q2. One end of the fifth resistor is connected to the processor 201, and the other end of the fifth resistor is connected to the The base of Q2 is connected, the emitter of Q2 is connected to signal ground, the collector of Q2 is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the fourth resistor, The base of the Q1 is connected, the other end of the fourth resistor is connected to the power supply terminal VBAT and the emitter of the Q1, and the collector of the Q1 is connected to the other end of the piezoelectric ceramic sheet J1.

Specifically, the utility model adopts the piezoelectric ceramic sheet J1 as a button acquisition component, and at the same time, it is also used as a vibration feedback output component. When the hand presses the button, the piezoelectric ceramic sheet generates a voltage output due to deformation. Since the output voltage is relatively high, the voltage regulator D1 is used to limit the voltage, and the first resistor is a current-limiting resistor. The second resistor is a pull-down resistor. When the button is not pressed, the voltage on the piezoelectric ceramic sheet is 0, which has anti-interference ability. When the button is pressed, a pulse signal is generated. The pulse signal after the pressure limit is collected by the button acquisition circuit, enters the processor, and the pulse signal is filtered by the processor. After that, the processor outputs an AC pulse signal to control Q2, so that Q1 switches to make the piezoelectric ceramic sheet vibrate, simulating the touch of a mechanical button for vibration feedback, so that people can know that the button is pressed. In Fig. 2, the fifth resistor and the third resistor are current-limiting resistors, and the fourth resistor is a pull-up resistor, which has anti-interference ability. At the same time, the processor can form different tactile sensations by changing the waveform of the pulse signal.

On the other hand, the utility model provides a button structure, including the circuit and the button panel provided by the embodiment of the utility model, and the piezoelectric ceramic sheet J1 is installed under the button panel. The key panel includes a metal panel or a plastic panel.

On the other hand, the utility model provides a door handle switch, and the door handle switch includes the button structure provided by the embodiment of the utility model.

Specifically, the piezoelectric ceramic sheet is placed under the button panel, and the button panel can be made of metal or plastic. Since the piezoelectric ceramic sheet is installed under the panel, it can be fully sealed and waterproof, and can be well applied to the exterior of the car, such as Door handle switch for car entry system.

The utility model provides a vibration feedback button circuit. The button circuit includes a piezoelectric ceramic sheet J1 for generating a pulse signal when pressed, a signal acquisition circuit for collecting the pulse signal, and a signal acquisition circuit for generating a pulse signal from the pulse signal. The AC pulse signal is fed back to the piezoelectric ceramic sheet J1 to make the piezoelectric ceramic sheet J1 vibrate. The piezoelectric ceramic sheet is used as the main body of the button. When pressed, the piezoelectric ceramic sheet generates high voltage, which is collected by the circuit , and then output a waveform to vibrate the piezoelectric ceramic sheet to simulate the feeling of the mechanical button when it is pressed. Due to the use of piezoelectric ceramic sheet, the input and output voltage is high, so the anti-interference ability is very high.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present utility model without creative work, and these modes will all fall within the protection scope of the present utility model.

Claims (8)

1. a vibrational feedback key circuit, it is characterized in that, the piezoelectric ceramic piece J1 of pulse signal is produced when comprising for pressing, for gathering the signal acquisition circuit of described pulse signal, described piezoelectric ceramic piece J1 is fed back to make the vibrative signal feedback circuit of piezoelectric ceramic piece J1 for producing pulse signal by described pulse signal, the output of signal acquisition circuit is connected with the input of signal feedback circuit, one end of piezoelectric ceramic piece J1 is connected with the output of signal feedback circuit with the input of signal acquisition circuit respectively, the other end ground connection of piezoelectric ceramic piece J1.

2. vibrational feedback key circuit according to claim 1, it is characterized in that, described signal feedback circuit comprises by the processor of described pulse signal generation pulse signal and described pulse signal is fed back to described piezoelectric ceramic piece J1 to make the vibrative feedback control circuit of piezoelectric ceramic piece J1.

3. vibrational feedback key circuit according to claim 2, is characterized in that, described signal feedback circuit comprises the processor being produced difform pulse signal by described pulse signal.

4. vibrational feedback key circuit according to claim 1, it is characterized in that, described signal acquisition circuit comprises the first resistance, the second resistance and voltage-stabiliser tube D1, one end of described first resistance is connected with the other end of described piezoelectric ceramic piece J1, the other end of described first resistance is connected with one end of the negative electrode of D1, the second resistance, and the anode of described D1, the other end of the second resistance are connected with signal ground.

5. vibrational feedback key circuit according to claim 2, it is characterized in that, described feedback control circuit comprises the 3rd resistance, 4th resistance, 5th resistance, triode Q1, Q2, one end of described 5th resistance is connected with described processor, the base stage of Q2 described in the other end of described 5th resistance connects, the emitter of described Q2 is connected with signal ground, the collector electrode of described Q2 is connected with one end of described 3rd resistance, the other end of described 3rd resistance and one end of described 4th resistance, the base stage of described Q1 connects, the other end of described 4th resistance and power end VBAT, the emitter of described Q1 connects, the collector electrode of described Q1 is connected with the other end of described piezoelectric ceramic piece J1.

6. a button, comprises the circuit described in claim 1 to 5 any one and key panel, and described piezoelectric ceramic piece J1 is arranged on the below of described key panel.

7. button according to claim 6, is characterized in that, described key panel comprises metal decking or plastic front board.

8. a door handle switches, is characterized in that, described door handle switches comprises the button described in claim 6 or 7.