Button Switch Stable Application Principle And Precautions
The button switch refers to a switch that uses a button to push the transmission mechanism, presses or disconnects the moving contact and the static contact, and realizes the circuit switching.
Button switch is a kind of master electrical appliance with simple structure and very wide application.
In electrical automatic control circuits, it is used to manually send control signals to control contactors, relays, electromagnetic starters, etc.
Button switch, also known as control button (button for short), is a low-voltage electrical appliance that can be manually and generally reset automatically.
Buttons are usually used in circuits to issue start or stop instructions to control the on and off of electrical coil currents such as electromagnetic starters, contactors, and relays.
The button switch is an electrical appliance that is used to switch on and off small current circuits that is pressed to act and released to reset.
Generally used in control circuits with AC and DC voltages below 440V and currents less than 5A, generally do not directly manipulate the main circuit, and can also be used in interconnected circuits.
The opening and closing state of the contacts when the button switch is not subjected to external force (ie static), divided into start button (ie normally open button), stop button (ie normally closed button) and composite button (ie normally open and normally closed contacts are combined into One button).
For the start button switch, the contact is closed when the button cap is pressed, and the contact is automatically opened and reset after being released; the opposite is true for the stop button, the contact is separated when the button cap is pressed, and the contact is automatically closed and reset after being released.
The composite button switch is that when the button cap is pressed, the bridge-type moving contact moves downwards, so that the normally closed contact is first opened, and then the normally open contact is closed; when the button cap is released, the normally open contact is first After breaking and resetting, the normally open contact is closed and reset.
Button switch Use matters:
(1) Check the button switch frequently to remove the dirt on it.
Due to the small distance between the contacts of the button, after years of use or poor seals, the inflow of dust or oil emulsions, etc., will reduce the insulation and even cause a short circuit accident.
In this case, insulation and cleaning must be done, and corresponding sealing measures must be taken.
(2) When the button switch is used in a high-temperature environment, it is easy to deform the plastic and cause the button to loosen and cause a short circuit between the terminal screws.
According to the situation, a fastening ring can be added to tighten it during installation, or an insulating plastic tube can be added to the wiring screw to prevent loosening.
(3) For the button switch with indicator light, the bulb will be hot, and the plastic lamp cover will be deformed for a long time, which will make it difficult to replace the bulb.
Therefore, it is not suitable to be used in places where the power-on time is long; if you want to use it, you can appropriately lower the bulb voltage to extend its life.
(4) If poor contact is found, the reason should be investigated: if the contact surface is damaged, it can be repaired with a fine file;
If there is dirt or soot on the contact surface, wipe it with a clean cotton cloth dipped in solvent;
If the contact spring fails, it should be replaced; if the contact is severely burned, the product should be replaced.
FILN company introduction
Filn is an innovative industrial and trading company integrating r&d, production and sales. The company was founded in 1998 and has 21 years of history. Now the company has three factories and one trading company.
FILN produces indicator lights, button switches, boat switches, guitar switches, touch control system switches, waterproof microswitches and other products.
FILN is the world’s most complete indicator lamp category of a manufacturing company, but also China’s only one has a small indicator lamp UL certificate mainland manufacturers.
In 2017, he started to design and develop guitar switch products, and in 2018, he completed the design of the new guitar switch with lights. He also participated in the electronics show in Thailand and the electronics show in Brazil.
In 2018, I obtained the indicator light UL certification in the United States and CCC quality certification in China. At the same time, I participated in exhibitions in Singapore, the United States and Germany.
In 2019, a research and development center was set up in shenzhen to develop touch control system switches, and the switch laboratory was established after obtaining the UL certificate for buttons and UL certificate for ship type. At the same time, the company participated in the electronic exhibition in Brazil and the electronic exhibition in Hong Kong.