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A Detailed Guide To Push Button Switches

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Push button switches are an important part of many electronic devices and circuits. They are used to control the flow of electricity in circuits. Push button switches can be found in everything from coffee makers to computers. Despite their simplicity, push button switches come in many shapes and sizes, each with its unique capabilities.

In this guide, we’ll take a closer look at the different types of push button switches and how they work. We’ll also learn about the different applications for push button switches, as well as some tips for choosing the right switch for your project.

What is a push button switch?


A push button switch is a device used to control the flow of current in an electrical circuit. This is a simple device consisting of a button that is pressed to complete the circuit and allow current to flow.

Buttons are usually made of hard material, usually plastic or metal. The product surface is usually flat or shaped to fit a human finger or hand to be easily depressed or pushed.

Buttons are usually biased switches, although many unbiased buttons (due to their physical nature) still require a spring to return to their unpressed state.

There are many different types of pushbutton switches, each with its unique functions and applications. Some common types of pushbutton switches include momentary switches, latching switches, and illuminated switches.

How does a push button switch work?


A push button switch is a switch that is activated by pressing a button. The button can be momentary, meaning it is only active when pressed, or it can be momentary off, meaning it is active when not pressed. There are also push button switches that are always on or always off.

How do push button switches work? When the button is pressed, it makes contact with the two metal terminals, completing the circuit and allowing current to flow. Current then flows through the load, such as a light bulb or motor, and activates it. When the button is released, the circuit is disconnected and the load is deactivated.

Most push button switches function the same. Pressure is applied to the button or actuator, causing the internal spring and contacts to be depressed and contact the stable contacts on the bottom of the switch. This process will close or open the circuit. Repeated application of pressure will cause the spring to retract and change the state of the button connection.

 

 

push button switch work principle

What are the types of push button switches?


There are many different types of pushbutton switches, each with its own unique advantages and disadvantages. The most common type of switch is the momentary push button switch, which is usually used in circuit applications. These types of switches are designed to activate for a short period of time, after which they deactivate themselves.

Another common type of pushbutton switch is the locking push button switch, often used to control electrical equipment. These switches work in the “on” position after being activated and can only be deactivated by pressing the switch again.

There are also pushbutton switches designed for use with computers, often called keyboard switches. These switches can be used to control the cursor, enter data, or perform other functions.

According to the opening and closing state of the contacts when the button switch is static, it is divided into 3 types, namely start button switch (normally open button), stop button switch (normally open button, closed button) and composite button switch (normally open and normally closed contact combination button).

Normally Open Button Switch
Composite Push Button Switch
Normally Closed Button Switch

How to select the button switch?


Pushbutton switches come in many shapes, sizes, and colors, and choosing the right switch for your project can be a bit overwhelming. Therefore, we can choose the most suitable button switch according to the following four principles.

First, select the appropriate button form according to the application. Such as handle rotation, key, emergency, light, etc. For example, the model with indicator light is used to display the working status, and the model with key is used to prevent misoperation by personnel.

Secondly, select the type of button according to the occasion of use, such as open, protective, waterproof, anti-corrosion, etc. For example, the universal button on the countertop panel can be opened to prevent the entry of liquid water and achieve the purpose of waterproofing.

Next, select the color of the buttons and indicator lights according to the requirements of the working state, instructions, and working conditions. For example, green is “start” or “on”, and red is “stop”.

Finally, according to the needs of the control loop, determine the number of different keys. There are single-button, double-button, three-button, multi-button, etc. For example, two buttons can be assembled in the same button box when “start” and “stop” controls are required.

Push Button Switch Applications


Foot Switch

Foot switches are rugged switches activated by foot pressure. An example of its use is controlling a machine tool, which allows the operator to free his hands to manipulate the workpiece. Effects pedals for electric guitarists and foot controls for amps are also foot witches.

PBS-24-302 Foot 3PDT Switch

Arcade Button Switch

Arcade buttons are commonly found in arcade and arcade game controllers. In arcades, arcade buttons can be heavily or roughly used, so durability is an important feature of arcade buttons. Multiple colors make it easy to distinguish buttons with different functions.

Industrial Push Button Switch

These push buttons usually take the form of complete built-in units, including push button actuators, retaining rings and contact blocks. They can be fitted with industrial push buttons to control the power cycle of heavy machinery, ensuring an immediate stop in an emergency. Designed for easy installation in areas requiring manual intervention, these buttons are ideal for industrial applications.

Industrial Push Button Switch

Door Switch

Surface mounted one-touch door switches are the best choice for sliding doors and standard door power switches. They are usually made of white plastic and can be used on all types of doors.

Anti-Vandal Switch

A tamper-resistant switch is an electrical switch designed to be installed in locations (or devices) and applications where they may be subject to abuse and attempts to damage them. For example, crosswalk switches. Vandal-resistant switches located on outdoor equipment must be able to withstand extreme temperatures, dust, rain, snow and ice.

If you are interested in other plastic button products and waterproof plastic button products, you can visit the designated webpage.

 

 

Anti-Vandal Switch

If you are interested in other plastic button products, you can visit the designated webpage.

How to use and maintain push button switches?


Check push button switch cleanliness regularly. The buttons have a small contact distance, so over time, the entry of dust or emulsified oil will reduce insulation performance and may even cause a short-circuit accident. In this case, insulation and cleaning must be carried out, and appropriate sealing measures must be taken.

When the button is used in high temperature occasions, the plastic is easily deformed and aged, resulting in loosening of the button and short circuit between the connecting screws. During installation, the tightening ring can be tightened according to the situation, or an insulating plastic tube can be added to the wiring screw to prevent loosening.

Due to the bulb can get hot and the plastic shade can warp over time, a button with an indicator light makes it difficult to replace the bulb. Therefore, buttons with indicator lights are not suitable for use in places with long power-on time. If you want to use it, you can reduce the voltage of the bulb appropriately to prolong its life.

Identify the cause of poor contact in a timely manner. If the contact surface is damaged, it can be trimmed with a fine file. If there is dust or smoke on the contact surface, wipe with a clean cotton cloth dipped in solvent. The contact spring has failed and should be replaced. The contact surface is severely burned and the product should be replaced.

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