CN201312300Y - Touch sensitive type car switch - Google Patents

Abstract

The utility model relates to a touch-sensitive automobile switch, comprising a touch switch, a switch surface layer, a circuit board, and a capacitive sensor. The inner surface of the switch surface layer arranged on the upper layer of the circuit board is closely connected. In the utility model, the capacitive sensor is arranged on the lower layer of the circuit board, and the circuit is closely connected with the inner surface of the switch to form an electrical circuit. When the human finger approaches or touches the switch, the capacitance parameter of the sensor will be changed, and the sensor can be detected according to the change of the parameter. The opening and closing of the output switch. The utility model has the following advantages: 1. High sensitivity, long service life, no contact failure and other shortcomings, and the function can be realized only by touching the touch switch of the car during use; 2. Simple structure, beautiful appearance, less materials used for manufacturing, and Low cost; 3. Safe and reliable.

Description

A touch-sensitive car switch

technical field

The utility model relates to a touch-sensitive automobile switch.

Background technique

With the continuous increase of the demand for automobiles, people's requirements for the convenience and safety of automobile use are also continuously improved. Existing automotive switches are all composed of injection molded parts, circuit boards and plastic elastic contact pads for buttons, which have the disadvantages of complex structure, many materials used, and contact failure after the switch is used for a period of time. At present, the commercially available push-type electronic switch needs a large pressing force and accurate pressing on the electric shock to realize the function during operation, which is laborious and labor-intensive, and the effect is not very ideal, and the switch will be oxidized between electric shocks, resulting in poor electric contact. The effect is not good, and even sparks will be generated, which will cause safety hazards to the car. Therefore people try to carry out research and development to automobile switch, and existing invention title is " a kind of electronic switch for automobile horn " (authorization announcement number is CN2807609, and authorization announcement date is on August 16th, 2006) provides a kind of The touch-type electronic switch for automobiles composed of touch electrodes, monostable circuits and relays can realize the on-off function of the switch through low-current control relays only by lightly touching the electrodes, but because the relays also have mechanical contacts Points, produce electric sparks, large volume and short life and other disadvantages. Therefore, the safety performance and usability of the touch-type automotive electronic switch in the prior art are still unsatisfactory.

Utility model content

The utility model aims to solve the above problems, and provides a touch-sensitive automobile switch with simple structure, elegant appearance, less materials and long service life of the switch, so as to increase the safety and convenience of automobile use. The utility model relates to a touch-sensitive automobile switch, which is mainly used in the control of automobile electronic modules, such as headlights, steering lights, car windows and sunroofs.

The technical problem to be solved by the utility model can be realized through the following technical solutions:

A touch-sensitive automobile switch, comprising a touch switch, a switch surface, a circuit board, and a capacitive sensor, characterized in that the sensor is arranged on the lower layer of the circuit board, and is arranged on the upper layer of the circuit board through the capacitive electrodes arranged on the circuit board The inner surface of the switch surface layer is closely connected; the touch switch is arranged on the switch surface layer.

The switch surface layer is made of plastic.

In the utility model, the capacitive sensor is arranged on the lower layer of the circuit board, and the circuit is closely connected with the inner surface of the switch to form an electrical circuit. When the human finger approaches or touches the switch, the capacitance parameter of the sensor will be changed, and the sensor can be detected according to the change of the parameter. The opening and closing of the output switch.

Specifically, the touch switch, the switch surface, the circuit board, and the capacitive sensor described in the utility model all adopt the known technology in the prior art field, and the relevant touch switch, the switch surface, the circuit board, and the capacitive sensor are in the prior art The known technical solutions in the above are well known to those skilled in the art, so they will not be repeated here.

Due to the adoption of the above technical solution, the utility model has the following advantages: 1. High sensitivity, long service life, no contact failure and other shortcomings, and the function can be realized by touching the touch switch of the car during use; 2. Simple structure and beautiful appearance 1. Less materials are used for manufacturing, and the manufacturing cost is low; 3. It is safe and reliable.

Description of drawings

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

Fig. 1 is a schematic structural view of Embodiment 1 of the present utility model.

Numbers in the figure: 1 is the excitation signal, 2 is the transmitting electrode, 3 is the receiving electrode, 4 is the converter, 5 is the touch switch, 6 is the switch surface, 7 is the circuit board, 8 is the human finger.

Fig. 2 is a schematic structural diagram of a new embodiment 2 of the present invention.

Numbers in the figure: 9 is an excitation signal, 10 is a converter, 11 is a receiving end, 12 is a transmitting electrode, 13 is a touch switch, 14 is a circuit board, 15 is a switch surface, and 16 is a human finger.

Detailed ways

In order to make the technical means, creative features, goals and effects of the present utility model easy to understand, the utility model will be further elaborated below in conjunction with the embodiments.

Example 1

As shown in Figure 1, a kind of touch-sensitive automobile switch of the present utility model comprises touch switch 5, switch top layer 6, circuit board 7, capacitive sensor, wherein said capacitive sensor is arranged on circuit board 7 lower layers, by setting The capacitive transmitting electrode 2 and the capacitive receiving electrode 3 on the circuit board 7 are closely connected to the inner surface of the switch surface layer 6 arranged on the upper layer of the circuit board 7 ; the touch switch 5 is arranged on the switch surface layer 6 .

The switch surface layer 6 is made of plastic.

Workflow: As shown in Figure 1, when not in use, the excitation signal 1 transmits the excitation signal 1 to the transmitting electrode 2 of the capacitor at a frequency of 250KHz, and the transmitting electrode 2 and the receiving electrode 3 of the circuit board layer 7 form two parts of the capacitor. The electrodes form an electric field. When the human finger 8 is not close to or touches the touch switch 5, the charge signal distribution of the receiving electrode 3 is only related to the surrounding environment, and the charge signal of the receiving electrode 3 is converted into an electrical signal by the sigma-delta converter 4 into a digital signal and serve as the original reference value. When in use, when a person's finger 8 is very close to or touches the touch switch 5, a part of the charge signal of the electric field will be introduced into the ground, which changes the amount of charge at the end of the capacitor receiving electrode 3, and then changes the value obtained through the sigma-delta converter 4, According to the change of this important parameter, the on-off function of the touch-sensitive automobile switch of the utility model is realized.

Example 2

As shown in Figure 2, a kind of touch sensitive automobile switch of the present utility model comprises touch switch 13, switch top layer 15, circuit board 14, capacitive sensor, wherein said capacitive sensor is arranged on circuit board 14 lower layers, by setting The capacitive emitter electrode 12 on the circuit board 14 is closely connected with the inner surface of the switch surface layer 15 arranged on the upper layer of the circuit board 14 ; the touch switch 13 is arranged on the switch surface layer 15 .

The switch surface layer 15 is made of plastic.

Workflow: As shown in Figure 2, when not in use, the excitation signal 9 is sent to the capacitive emitter electrode 12 through the receiving end 11 at a frequency of 250KHz. When the human finger 16 is not close to or in contact with the touch switch 13, the receiving The distribution of the charge signal at the end 11 is only related to the surrounding environment, and the charge signal at the receiving end 11 is converted into a digital signal by the sigma-delta converter 10 and used as an original reference value. When in use, when a person's finger 16 is very close to or touches the touch switch 13, a part of the charge signal of the electric field will be introduced into the ground, which changes the amount of charge at the capacitive receiving electrode 11, and then changes the value obtained through the sigma-delta converter 10, According to the change of this important parameter, the on-off function of the touch-sensitive automobile switch of the utility model is realized.

There are various types of electrical contacts for existing automotive switches. The automotive touch switch designed using the principle of capacitive sensors has not been reported in the literature, but similar products have been used in automobiles, such as on-board Bluetooth switches and car audio panel switches. The utility model relates to a touch-sensitive automobile switch, which is mainly used in the control of automobile electronic modules, such as the switch control of headlights, turn signals, car windows and sunroofs.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. The utility model does not depart from the spirit and scope of the utility model There will also be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (2)

1. A touch-sensitive car switch, comprising a touch switch, a switch surface, a circuit board, and a capacitive sensor, characterized in that the sensor is arranged on the lower layer of the circuit board, and the capacitive electrodes arranged on the circuit board are connected to the circuit board through the circuit. The inner surface of the upper switch surface layer on the circuit board is closely connected; the touch switch is arranged on the switch surface layer. 2. A touch-sensitive car switch according to claim 1, wherein the surface layer of the switch is made of plastic.

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