Touch feedback device

Abstract

The utility model provides a touch feedback device which comprises a touch signal acquisition layer, a metal net, polyvinyl chloride gel, metal foil and a driving circuit, the driving circuit is provided with a signal input end, a power input end and a power output end, the signal input end is in circuit communication with the touch signal acquisition layer, the external working voltage of the power input end is direct current 5V, and the external working voltage of the power output end is direct current 5V. The power supply output end outputs 220V-250V square wave voltage signals when working, the positive electrode of the power supply output end is conducted with the metal net, and the negative electrode of the power supply output end is conducted with the metal foil; when a user touches or presses the touch signal acquisition layer, the touch signal acquisition layer can transmit an electric signal to the driving circuit as an input signal, and the circuit can boost the voltage to 220V-250V and drive the polyvinyl chloride gel to deform towards the metal net. When a voltage signal of the driving circuit is output in an on-off square wave mode, the polyvinyl chloride gel can be in a continuous deformation-recovery state, and therefore the vibration effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the operation feedback device field, specifically is a kind of touch feedback device. BACKGROUND

[0002] Operation feedback system is widely applied in electronic equipment, and common operation feedback system includes light feedback, sound feedback and touch feedback (also known as vibration feedback) system. Light feedback system usually refers to the situation that the device reminds the user to perform operation by emitting light when the user and the device perform a series of interactive operations. Sound feedback refers to the situation that the device reminds the user to perform operation by emitting sound. Touch feedback refers to the situation that the device reminds the user to perform operation by vibration. Since the hardware prices of light feedback and sound feedback are low, they are widely applied in electronic products. However, vibration feedback has the characteristics of quietness, no light pollution, strong adaptability and friendliness to disabled people, and has irreplaceable use in home, noisy places and special equipment field.

[0003] Under the prior art, touch feedback is mainly realized by linear motor vibration. However, linear motor has a certain volume and is expensive. At present, it is mainly used in mobile phones and high-value-added electronic equipment. Therefore, it is necessary to find a vibration feedback device with low price and small volume to greatly reduce the application cost of touch feedback. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a kind of touch feedback device, for solving the problems in the background art, the device uses touch acquisition sensor (for example ITO film), polyvinyl chloride gel device, boost driving circuit as module group, by collecting touch signal, and with the signal as the opening signal of boost driving circuit, drive polyvinyl chloride gel device vibration, to realize the effect of touch feedback vibration.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A kind of touch feedback device, including touch signal acquisition layer (1), metal net (2), polyvinyl chloride gel (3), metal foil (4), driving circuit (5), the driving circuit (5) has 1 signal input end (5.1), 1 power input end (5.2), power output end (5.3), the signal input end is in circuit communication with touch signal acquisition layer (1), the working voltage of external power input end is direct current 5V, power output end outputs 220V-250V square wave voltage signal when working, output voltage 0V in non-working state, the positive electrode of power output end is conducted with metal net (2), the negative electrode is conducted with metal foil (4);

[0007] When the user touches or presses the touch signal collection layer (1), the layer will transmit an electrical signal to the driving circuit (5) as an input signal, and when the touch signal is received, the circuit can boost the voltage to 220V-250V and drive the polyvinyl chloride gel (3) to deform towards the metal mesh (2). The metal mesh (2), the polyvinyl chloride gel (3), and the metal foil (4) form a vibration unit. When the driving circuit (5) outputs a voltage signal in the form of an on-off square wave, it can cause the polyvinyl chloride gel (3) to be in a constant deformation-recovery state, thereby achieving the effect of vibration.

[0008] In the above technical solution, the following further preferred solutions are provided:

[0009] The touch signal collection layer (1) is a capacitive sensor film, such as an ITO film or a ceramic capacitive pressure sensor; a piezoelectric sensor film, such as a polyvinylidene fluoride film.

[0010] The metal mesh (2) is a copper mesh or a stainless steel mesh with a mesh diameter of 40-80 mesh and a wire diameter of 0.12-0.15 mm.

[0011] The polyvinyl chloride gel (3) has a thickness of 0.1-0.3 mm.

[0012] The metal foil (4) is made of aluminum foil or copper foil with a thickness of 0.04-0.12 mm.

[0013] Further, the vibration unit composed of the metal mesh (2), the polyvinyl chloride gel (3), and the metal foil (4) can be further stacked to achieve stronger vibration effect. The structure of the stack is metal mesh-polyvinyl chloride gel-metal foil-polyvinyl chloride gel-metal mesh arranged in sequence.

[0014] (Three) beneficial effects

[0015] The device structure is simple, the overall device structure occupies a small volume, and the device can be attached to the back of a common electronic device key. When the user presses or touches the key, the lower vibration module vibrates. This solution is suitable for large-area, narrow-space scenarios that require vibration solutions to replace linear motors, achieving excellent economy. The device has low power consumption and long service life, and has excellent environmental properties. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure of the present application is shown in the figure.

[0017] Figure 2 The driving circuit diagram of the present application is shown in the figure. DETAILED DESCRIPTION

[0018] The technical solutions, use methods, installation sequences, and material properties of the present application will be clearly and completely described below with reference to the accompanying drawings of the present application. For orientation words such as "up", "down", "left", "right", etc., no special explanation is given, and they are all referred to the position seen by the human eye in the corresponding drawings.

[0019] Any raw material used in the present embodiment, if not specifically stated, is a commonly available raw material on the market. The polyvinyl chloride gel used in the present embodiment is prepared by stirring dibutyl adipate and tetrahydrofuran until they are fully mixed, maintaining the stirring state, and adding PVC powder, and then performing flow casting by a flow casting machine to obtain a polyvinyl chloride gel film. In addition, due to the long development device test and debugging period, high test and detection cost, and other reasons, all experimental supplies in the following embodiments, such as the touch signal collection layer (1), use ITO film, the metal mesh (2) uses brass mesh with a mesh diameter of 60 meshes and a wire diameter of 0.15 millimeters, and the metal foil (4) selects copper foil with a thickness of 0.08 millimeters.

[0020] Referring to Figure 1 A touch feedback device includes a touch signal collection layer (1), a metal mesh (2), a polyvinyl chloride gel (3), a metal foil (4), and a driving circuit (5). The driving circuit (5) has one signal input end (5.1), one power input end (5.2), and a power output end (5.3). The signal input end is in electrical communication with the touch signal collection layer (1). The positive pole (5.3+) of the power output end is in communication with the metal mesh (2), and the negative pole (5.3-) is in communication with the metal foil (4). At this time, the assembly of the device of the present application is completed. A 5V 1A power supply is connected to the power input end (5.2) to enter the standby state.

[0021] Referring to Figure 2 , Figure 2For the drive circuit design diagram, the circuit can detect the behavior of human hand touching the key, and use the microcontroller (MCU) to output the PWM (pulse width modulation) signal of specific frequency and voltage, to drive the PVC gel to produce contraction vibration effect. The whole system realizes sensitive detection of human hand contact through precise touch sensor, ensures short and accurate response time. When the user touches the key, the touch sensor immediately generates a signal, which is immediately sent to the MCU. The MCU analyzes the signal according to the preset program, and outputs the corresponding PWM signal. The frequency and voltage of the PWM signal can be programmed according to the demand, so as to realize the effective driving of PVC gel. This process not only can cause the contraction of PVC gel, but also can produce vibration effect, to provide intuitive feedback for users. In order to ensure the stability and performance of the circuit, the power management and signal integrity are specially considered in the design. In addition, through optimizing the component layout and PCB design, the anti-interference ability and overall reliability of the circuit are enhanced.

[0022] It should be noted that Figure 1 The drive circuit diagram of the PVC gel is not completely representative of Figure 2 For example, the signal input end (5.1), although only one is drawn in Figure 1 In actual use, the ITO film signal input end often has multiple pins, Figure 2 The circuit diagram with multiple pins is given in

[0023] When the user touches or presses the ITO film of the touch signal collection layer, the layer will deliver a signal to the drive circuit (5) as an input signal. Upon receiving the touch signal, the drive circuit can boost the voltage to 220V-250V square wave voltage and drive the PVC gel (3) to deform towards the metal mesh (2) for about 0.05-0.1 seconds, causing the PVC gel (3) to be in a state of continuous deformation-recovery, thereby achieving the vibration effect.

Claims

1. A haptic feedback device, characterized by, The application relates to a touch signal acquisition layer (1), a metal net (2), a polyvinyl chloride gel (3), a metal foil (4) and a driving circuit (5), wherein the driving circuit (5) has one signal input end (5.1), one power input end (5.2) and a power output end (5.3), the signal input end is in circuit communication with the touch signal acquisition layer (1), the power input end is externally connected with a working voltage of 5V, the power output end outputs a 220V-250V square wave voltage signal during working, outputs 0V during non-working, the positive pole of the power output end is in conduction with the metal net (2), the negative pole is in conduction with the metal foil (4), the touch signal acquisition layer (1) transmits an electric signal to the driving circuit (5) as an input signal during working, when the input signal is received, the driving circuit (5) boosts the voltage to 220V-250V and drives the polyvinyl chloride gel (3) to deform towards the metal net (2), the metal net (2), the polyvinyl chloride gel (3) and the metal foil (4) form a vibration unit, when the voltage signal of the driving circuit (5) is output in the form of an open-close square wave, the polyvinyl chloride gel (3) is in a continuous deformation-recovery state, thereby realizing the vibration effect.

2. A tactile feedback device according to claim 1, wherein The touch signal acquisition layer (1) is a capacitive sensor film, an ITO film, a ceramic capacitive pressure sensor film, a piezoelectric sensor film or a polyvinylidene fluoride film.

3. The tactile feedback device of claim 1, wherein, The metal net (2) is a copper net or a stainless steel net, the mesh diameter is 40-80 meshes, and the wire diameter is 0.12-0.15 mm.

4. The tactile feedback device of claim 1, wherein, The polyvinyl chloride gel (3) has a thickness of 0.1-0.3 mm, the metal foil (4) is an aluminum foil or a copper foil, and the thickness is 0.04-0.12 mm.

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