Membrane switch has rigorous structure, beautiful appearance, good sealing, moisture-proof and long service life. Membrane switches have different structures and processes for different users, environments, and terminal equipment. Zhi Dexing will talk to you about the advantages and disadvantages of several common types of membrane switches.

Advantages and disadvantages of several common types of membrane switches

1. Metal shrapnel (dome) type: use metal shrapnel as the conduction medium.

Advantages: the keys feel good, the strength is uniform, and the stroke accuracy is high; you can hear the crisp sound when operating, and you can clearly know the operation situation, avoiding repeated operations due to the buffer time of some equipment; the operating temperature can reach -20 ~ 80 ℃

Disadvantages: When the liner is uneven or pasted on the bending arc is too large, the shrapnel may cause short circuit, malfunction and non-rebound phenomenon.

Suggestion: Use it on a flat backing board that can withstand the force of the keys, or directly use a thicker PCB board as the circuit layer.

2. Hot-pressed convex handle type: After printing the contact surface with film material, the bumps are rolled to form resilience.

Advantages: long service life, which can reach more than 500,000 times; good hand feeling, stroke and strength can be customized according to customer needs;

Disadvantages: The cost of the mold is high, and a convex mold needs to be opened; using it in a high temperature environment may lead to weakening of the button force.

Suggestion: Open the metal mold of the convex bud mold to ensure the consistency of the key force and stroke.

3. Flat light touch type: the contact point uses a film substrate to print conductors, and does not use secondary processes

Advantages: The button has a long life span, which can reach one million times; the conduction contact area is large, and the conduction rate is guaranteed.

Disadvantages: No operating feel, easy to cause repeated operation or misoperation;

Suggestion: Enlarge the key spacing as much as possible, otherwise it will increase the failure rate and reduce the life span.

4. Capacitive sensing type: use conductors to induce conduction.

Advantages: Like a capacitive touch screen, it can sense actions within a certain distance; the sensing distance can be designed according to customer specifications.

Disadvantages: The pass rate of finished products is low, sensitive to the surrounding electromagnetic interference, and the design requirements are very high; it needs the support of related electronic components and chips.

5. PCB circuit type: use PCB circuit board instead of thin film circuit layer

Advantages: PCB circuit has high precision, soldered LED is more solid and reliable, and the resistance value is lower; the thickened PCB circuit layer can be directly used as a lining board.

Disadvantages: PCB is a rigid material and cannot be bent.

Membrane switches have a wide range of applications, widely used in electronic communications, electronic measuring instruments, industrial control, medical equipment, automotive industry, smart toys, household appliances and other fields. Several types of common membrane switches are introduced here. If you want to know more about membrane switches, you can pay attention to Zhidexing, a membrane switch panel manufacturer specializing in membrane switches, membrane panel processing, and membrane button customization. It provides industrial control membrane switches. Customized, touch panel processing, membrane button panel, membrane switch panel manufacturer developed by industrial control membrane switch, for details, please log in to the official website to consult customer service!

Contact:Mr. Bin

E-mail:
binyq@ahtongchi.com

Phone:
+86-0566-5229929

Address:
Building 1, Fu'an Industrial Park, Chizhou Development Zone, Guichi District, Chizhou City, Anhui Province