Tactile and Non-Tactile membrane switches

JRPanel Erin KOU JAN 14, 2020

The most economical and reliable design is the non-tactile membrane switch. Non- tactile membrane switch is flat and has no tactile feedback. However, this design relies on other methods of identifying a feedback or that a connection is made.

These include indicator LEDs (visual), LCD screen (visual), or a sound(audible). In other words, an LED light can blink or a beeping sound can be heard when a button is pressed. This type of non-tactile membrane switch has the longest life cycle and reliability.

The other type of membrane switch is the tactile membrane switch. Tactile membrane switch is very popular because it provides a direct feedback to users that a connection is made.

One way to design a tactile membrane switch is to dome emboss the keys on the graphic overlay. Although it is a little bit more cost that a non-tactile or flat membrane switch, and requires an embossing tool, it is still a common way to provide tactile feedback when needed.

Another design option for a tactile membrane switch is to emboss the upper switch layer or poly-dome. This will also require an embossing tool. One drawback is that this type of tactile membrane switch provides a milder tactile response and less snap action. Also, it is sensitive to temperature and therefore, high temperature conditions may affect its snap feedback. The best way to get the optimum snap and tactile feedback is to use a metal dome.

Metal domes can get expensive especially if the membrane switch has a lot of keys. It is also recommended that the graphic overlays where the keys are, should be full embossed to accommodate the metal dome height. Therefore, an emboss tool may still be required. One thing to consider when using metal domes for tactile membrane switch is that it needs a rigid backing, so that when the metal dome is pressed down, it does not get inverted.

An inverted metal dome, is one of the major failures of a tactile membrane switch and is mostly due to the metal dome being bent or deformed when assembling to the plastic housing, and/or pressing the keys when there is lack of rigid support.

---------------

Topspeed manufacture fab for

Membrane switch, Graphic Overlay & Acrylic Overlay

Online instant quote

www.jrpanel.com

Comments

Identify Different Types of Transformer Cores, Based on Materials

Hi guys, this is JRPanel ! In previous blog s, we have introduced several points about High Frequency Transformer, like bobbins and Flat Spiral Coil . In this blog, JRPanel would like to introduce the commonly used magnetic cores in transformers , based on materials. Generally speaking, the material of the core determines the environment in which the transformer is used. A transformer that uses a core of a different material will have its performance affected, may even be non-functional. By material, magnetic cores are generally divided into the several categories . JRPanel will introduce them one by one to help you understand more fully. 1. Manganese Zinc Ferrite Core Mn-Zn core is a soft magnetic core with high initial permeability (2000~15000). The higher the initial permeability, the lower the surface resistance, so it is generally used in circuits below 1 MHz. Mn-Zn core has a high saturation flux density and causes lower losses, making it one of the most desirable

The Relationship Between Plastic Nameplates and Membrane Switches

Before the 1970s, most nameplates were made of metal materials. Today, plastic nameplates have been widely used in household appliances, instruments, meters, office equipment and other fields, and have become an indispensable part of electromechanical products. It not only plays the role of trademark identification, specification model, function indication, etc., but also becomes an element that reflects the appearance of the product. With the continuous use of new materials and new processes, the surface of plastic nameplates is constantly improving, and it has become the crystallization of three major technologies: comprehensive surface treatment, processing and molding, and screen printing. Plastic nameplates can be divided into 2 types according to their material processing methods and objects of use: 1. The injection-type plastic nameplate is made of ABS, PC and other engineering injection molding, and then undergoes secondary surface decoration processing such

The Main Use and Classification Methods of Transformer Bobbins

Hi guys, this blog is still about high frequency transformers . JRPanel would like to introduce you the main use of transformer bobbins and how we classify them. In the pictures are the transformer bobbins. Following are the main uses of that JRPanel has summarized for you: 1. The bobbins provide space for winding copper wires in transformers. 2. Wire channel in the bobbins provides path for transformer winding. 3. The bobbins help to fix the core in the transformers. 4. The metal pins in the bobbins are connected to the PCB after soldering, which play an important role in conducting electricity when the transformer is working. 5. The baffle at the bottom of the bobbins isolates the core from the tin stack to avoid poor volta ge resistance. From this it can be seen that the importance of bobbins in transformer is extraordinary. After understanding the main uses of transformer bobbins, JRPanel is to introduce its common classification methods. Fi

JRPanel

Search This Blog