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Shenzhen Guangjiayuan Electronic Technology Co., Ltd

Mr. Chen: 136-6225-2835 (same WeChat account)

QQ: 979285705

Miss Chen: 189-2385-0895 (same WeChat account)

QQ: 2391552662

Chen Weiting :135-3824-4786 (same WeChat account)

Chen Weihao: 139-2459-4393 (same WeChat account) 

Tel: 86-0755-33182327

Email: gjydz88@163.com

Website: www.usb-type.com

Address: Building 10, Hongxing Gebu Qixiang, Songgang Town, Bao'an District, Shenzhen, Guangdong Province

What does the four pins of a light touch switch mean

2021-05-21

When using a four foot light touch switch to meet the operating force conditions, apply pressure to the switch to perform the opening and closing functions.

When the pressure is revoked, the four foot light touch switch will be closed, and the internal structure of the four foot light touch switch relies on metal shrapnel to protect the stress situation, achieving connection and disconnection.

The working principle of this switch is actually similar to that of ordinary button switches, consisting of a combination of normally open and normally closed contacts. In a four foot light touch switch, the function of the normally open contact is to present a connected state when pressure is applied to the normally open contact; When this pressure is lifted, it returns to the original normally closed contact, also known as disconnection. The force of pressure is the action of using our hands to open and close buttons. In summary, the working principle of the four foot light touch switch is still easy to understand.



Overview of contact switches, also known as button switches, first appeared in Japan [referred to as sensitive switches]. When used, the switch function is closed and closed by applying pressure to the direction of switch operation to meet the conditions of operating force. When the pressure is released, the switch is opened, and its internal structure is achieved by changing the force on the metal spring.


The light touch switch consists of: insert, base, spring piece, button and cover plate. The waterproof light touch switch adds a layer of polyimide film on the spring piece (as shown in the figure).

The light touch switch has the advantages of small contact resistance load, accurate operating force error, and diversified specifications. It has been widely used in electronic equipment and Major appliance, such as audio and video products, digital products, remote controls, communication products, household appliances, security products, games, computer products, fitness equipment, medical equipment, currency verification pens, laser pen keys, etc. Because the light touch switch directly replaces large equipment and high-load buttons with conductive rubber or pot switch hardware shrapnel due to environmental conditions such as elastic force less than twice the applied pressure/environmental temperature and humidity conditions, as well as electrical performance, such as medical equipment, television remote controls, etc.

Regarding the pin position issue of the five pin light touch switch: Two pins are grouped together, and when correctly applying pressure to the switch body, the four pins are connected, and the fifth pin serves as a ground.

The light touch switch is a fourth generation switch product developed with the requirements of electronic technology development. The earliest volume was 12mmx12mm, 8mm and 8mm, and now it is 6mm less than 6mm. There are three product structures: vertical, horizontal and horizontal with ground end, and now there are two types of combination (3M, 4M, SM, 6M, SM) and Potentiometer touch switch combination, which meet the requirements of various domestic electronic products. There are three installation dimensions available: 6.3mm and 4.5mm, 5.5mm and 4mm, and 6mm and 4mm. There are already 4.5mm and 4.5mm small touch switches and disc type touch switches abroad, and disc type touch switches are suitable for surface assembly. At present, the use of conductive rubber switches is also very popular.

There are now fifth generation switches - thin film switches, which have the same function as touch switches and are mainly used in electronic instruments and CNC machine tools, but with high resistance and poor hand feel. In order to overcome the phenomenon of poor hand feel, there are also cases where contact springs are installed inside the thin film switch instead of using a silver layer as the contact point.


contact information

Contact person: 

    Mr. Chen 136-6225-2835 (same WeChat account)

    Miss Chen 189-2385-0895 (same WeChat account)

    Chen Weiting 135-3824-4786 (same WeChat account)

   Chen Weihao 139-2459-4393 (same WeChat account) 

Address: 

    Building 10, Hongxing Gebu Qixiang, Songgang Town, Bao'an District, Shenzhen, Guangdong Province




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