Introduction
Most people only focus on the micro switches themselves and have not paid attention to the protective covers for them. In the use of micro switches, although the protective cover is just an accessory, it plays a significant role - it can prevent dust and liquids from entering, protect the internal components from damage, and provide a more comfortable feel when pressing. Choosing the right protective cover can make the micro switch last longer and be safer. Let's talk about the common types and selection tips for protective covers below.
Four common types of protective covers
The most commonly used type is the key-type protective cover, which is directly attached to the switch button. It has a simple structure and is inexpensive. Most home appliances and office equipment buttons use it. If the switch has a lever arm, such as the safety door switch on industrial equipment, it is more suitable for the lever-type protective cover, which can cover the lever and the base, providing better protection. In some scenarios with higher protection requirements, such as outdoor equipment and medical instruments, an integrated sealed protective cover should be used. It can wrap the entire switch and terminal, with dust and water protection levels up to IP67 or even IP69K, capable of short-term immersion or high-pressure rinsing. There are also protective covers with indicators, such as red ones for emergency stop buttons, which are easy to distinguish functions and prevent incorrect pressing, suitable for complex control panels.
The key to selection
When choosing a protective cover, the first thing to consider is the environment. If the equipment is in a humid place, it should be selected to be splash-proof, at least of IP54 level. If it is in a food processing plant or medical scene, a food-grade silicone protective cover that can be sterilized at high temperatures should be used, and it must be non-toxic and odorless. The feel is also an important point. The silicone protective cover is soft and comfortable to press, but it will increase the operating force. It is necessary to ensure that pressing can trigger the switch. The TPU material protective cover has a delicate touch, is fatigue-resistant, and is suitable for frequently pressed buttons. The most important thing is the size matching. First, clearly identify the model of the micro switch to know whether the button is round, square, and what the diameter is, and then select the corresponding protective cover - if the size is not matched, either it won't fit or it won't be operable, and it won't provide protection. First, clarify the requirements: in what environment is the equipment used? What to protect against? Should the feel be soft or hard? The second step is to confirm the switch model, find out the specific style; the third step is to prioritize checking the brand website of the switch, such as Omron, Honeywell, of course, our RENEW’s protective covers are also of high quality, they will recommend matching protective covers, which is the most reliable; the fourth step is to definitely test with samples, install and see if it is easy to press, can block water and dust, and if there are no problems, then use in batches.
Conclusion
Although the protective cover is small, it is a key component of the micro switch. Choosing the right protective cover can not only extend the lifespan of the switch but also make the equipment safer and more convenient to use. Whether it is for household appliances, industrial equipment or medical instruments, choosing the right accessories can provide an extra layer of protection for the equipment.
Post time: Sep-02-2025
