Four-legged button switch _ four-legged button switch pin diagram _ four-legged button switch wiring diagram

The four-legged pushbutton switch is a type of thing with our usual tactile switch and six-legged switch. The four-legged pushbutton switch cannot be self-locking, but every time it is pressed, the signal will jump once. When not pressed, only two sets of pins are connected. When pressed, the four pins are connected together.

The bottom can be expressed as:

To ensure accuracy, it is recommended to measure the continuity of each pin with the “diode, resistor, and buzzer” of the multimeter before use.

The working principle of this kind of switch is similar to the working principle of the ordinary push button switch. It consists of a normally open contact and a normally closed contact. In the four-leg push switch, the function of the normally open contact is when the pressure is normal. When the open contact is pressed, the circuit is turned on; when the pressure is removed, the original normally closed contact is restored, which is called disconnection. The force of this pressure is to use our hands to open the button and close the button. All in all, the working principle of the four-legged push button switch is well understood.

The four-foot button switches used in different conditions or in different environments may be different or different. This requires a fairly familiar grasp of the different series of specifications and models. The main specifications of the four-foot button switch are side plug-in type, patch type, plug-in type, etc. In addition, there are 8*8 series waterproof switch, 6*6 series waterproof switch, 10*10 series waterproof switch and 12*12 series waterproof switch. Different models of four-foot button switches, the model series is also very different. For example, 6*6*5.5/12/10/13/4.3/17/21/26mm and other four-foot button switches.

The front also briefly mentions the application range of the four-legged push button switch, electric wind, microwave oven, television, electronic fat scale, rice cooker and electronic kitchen scale in household appliances; monitors, video walkie-talkies, etc. among security products ; recording pens, cameras, etc. in the computer; call systems, sphygmomanometers, thermometers, etc. in medical equipment, massage chairs, running machines, etc. in fitness equipment, these four-foot button switches are involved in applications. In addition, there are many aspects, and from the application range of the four-foot button switch, it can be seen that this switch will be more widely used in the future development.

The quality of the switch will directly affect the use of the product. Therefore, when selecting the four-foot button switch, pay attention to its physical properties such as solderability, protection, conduction, etc. The service life is long-lasting and the touch is rough. These external surface factors will also determine the four-foot button. The advantages and disadvantages of the switch. In order to reduce the resistance, silver plating is applied to the pins, so the high-quality four-legged push button switch has silver plating thickness and process control on the pins. The final silver plating is 0.3um or more, and the thin silver is 0.2. Um, 0.1um is white. After the four-foot button switch is silver-plated, its protection is waterproof and dustproof. Otherwise, it will be oxidized by air.

Regarding the welding of the switch, it is necessary to confirm the conditions at the time of production. Due to the different conditions, the conformity exerted on the terminals and the deterioration of the deformation are also possible, so be sure to pay attention to this when using them. For the thermal stress effect of the four-legged push button switch, it is necessary to fully confirm the preparation before use; for the two welding processes, after the first welding, return to the normal temperature state for secondary welding, if continuous heating The shape of the four-legged push button switch changes, and the terminal may also fall off, resulting in a decrease in electrical characteristics. The resistance load of the four-leg push button switch is designed according to the premise. Please pay attention to the confirmation when using other loads.

There are 2 groups of switches in 4 pins. When pressed, the 2 groups are energized at the same time, and the release is 2 groups at the same time.

The figure above is the wiring diagram. The 1st and 2nd feet are one end, and the 3rd and 4th feet are the other end. Different manufacturers have different labels.

When the tact switch is pressed, the circuit is turned on. After the hand is released, the circuit is still turned on, and then the circuit is turned off again. When the touch button is pressed, the circuit is turned on, and the circuit is released when the hand is released.

Due to the small size of the components and the poor mechanical strength, in order to reliably connect the circuit and reduce the contact resistance, two sets of contacts are used in parallel, so there are 4 feet instead of one like a relay, one set is a normally open contact, and the other group It is a normally closed contact.

You can use the multimeter's resistance file to identify the structure, or search for the manufacturer's data by model.

1. The multimeter is adjusted to the diode

2. First measure any two of the four corners to determine which two corners are conductive and which two corners are open.

3. Press the button and measure any two feet to judge which two corners are conductive and which two corners are disconnected.

4, start to disconnect, press the two feet of the button can be used as the two corners of the welding

According to experience, direct welding can be performed as long as the diagonal is normal.

Note: The working principle of the button switch is that when the button is pressed, the two patches are close, that is, the switch is turned on; when released, the patch is separated, that is, disconnected.

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