Domestic electrician market, switch socket types, styles, color, appearance also tend to be personalized. From the initial home pull switch, the second generation of finger pressure switch, the third generation of large rocker switch, to the fourth generation of switch steel frame switch, the development of the switch has fully demonstrated the continuous improvement of the home environment. And the diversity of consumer needs. According to the survey, after the fourth-generation steel frame switch entered the market, it was favored by consumers because of its performance and safety advantages, and has gradually occupied the classification method of the mainstream tact switch in the switch market: According to the detection method, it can be divided into reflection type, and the three types of on-beam and specular reflection type are far away from each other, and the density (transparency) of the translucent object can be detected. The reflective working distance is limited to the intersection of the beams to avoid background effects. The specular reflection has a long reflection distance and is suitable for long-distance detection. It can also detect transparent or translucent objects.
According to the structure, the tact switch can be divided into three types: amplifier separation type, amplifier built-in type and power supply built-in type.
(1) Amplifier separate type tact switch is to separate the amplifier from the sensor, and is made by an ASIC and a hybrid mounting process. Since the sensor has ultra-small and muti-variety characteristics, the amplifier has many functions. Therefore, this type adopts the terminal block connection mode, and can be handed over, and the DC power supply is common. With on-off and off-delay function, it can set bright, sound-switching switch, can control 6 kinds of output states, and has two output modes: contact and level.
(2) The built-in type of amplifier is to integrate the amplifier and the sensor, and is made by an ASIC and a surface mount process, and operates with a DC power supply. Its response speed (with 0.1 milliseconds and 1 millisecond) can detect small and high-speed moving objects. Change the polarity of the power supply to switch between bright and dark, and set the self-diagnosis stable working area indicator. It has two output modes of voltage and current, which can prevent mutual interference and is very convenient in system installation.
(3) Tactile switch The built-in tact switch is a combination of an amplifier, a sensor and a power supply device, and is fabricated by an ASIC and a surface mount process. It generally uses AC power, which is suitable for replacing the contact type switch at the production site and can be directly used in the high-power control circuit. It can also set the self-diagnosis stable working area indicator. The output is equipped with SSR solid state relay or relay normally open, normally closed contact to prevent mutual interference and can be installed tightly in the system.