What is the most common reason why automatic opening/closing umbrellas "break"?

Getting in and out of cars on rainy days, or when your hands are full with bags. An automatic open-close umbrella that pops open with a single button press and folds away with another is an incredibly smart tool for modern, busy life. However, we sometimes receive inquiries from customers saying that this convenient tool has "suddenly stopped working."

In reality, the cause for many automatic umbrellas failing to function is less about a breakdown and more about the strain placed on the mechanism due to "habitual operation."

The Little-Known Role of the "Close Button"

You might be surprised, but some people who use automatic umbrellas are unaware that they are supposed to "use the button to close it as well."

"I thought it used a button to open, but that it was meant to be pulled down by hand when closing, just like a regular manual umbrella."

A customer once told us exactly that. For those of us who have spent years using manual folding umbrellas, pulling down the "runner" (the part where the ribs meet) by hand may be an unconscious habit. However, with an automatic umbrella, this unconscious action can lead to unexpected malfunctions.

The Role of the Internal "High-Strength Fiber"

Generally speaking, an automatic opening and closing system has a complex structure. Inside the shaft, there is a powerful spring, and inside that, there is a very thin, extremely strong cord called "high-strength polyethylene fiber" threaded throughout.

By pressing the button, this strong cord works in tandem with the spring to transmit force and close the umbrella. However, if you pull the runner down by hand without using the button, the tension that should be taut in the cord is lost, causing the cord to tangle within the internal mechanism.

Once the cord becomes tangled, it is extremely difficult to disassemble and repair. This is the definitive cause of why an automatic open-close umbrella may stop responding when the button is pressed, or why the opening and closing action ceases to be smooth.

Preventing "Invisible Defects"

The tricky thing about handling automatic umbrellas is that immediately after forcing it shut by hand, there is no visible sign of any abnormality. The ribs aren't broken, and the fabric isn't torn. Even though it looks perfectly fine on the outside, the internal opening and closing mechanism is damaged. As a result, when you go to use it next, it won't move, leading to a situation where you might wonder, "Why did it break?"

The trick to enjoying a long, comfortable relationship with your automatic umbrella is very simple.

  1. Always use the button to both open and close it.

  2. Only use your hands to push the shaft in until it clicks after the umbrella has been folded by the button.

As long as you follow this rule, you can enjoy the convenience of your umbrella for a long time without damaging its internal mechanism.

[View AMVEL's Automatic Open-Close Umbrella Lineup]

Additionally, for those using models with a "safety stopper" (anti-rebound mechanism), there is one thing to keep in mind. This type of umbrella is designed so that it will not open when the button is pressed unless the shaft is pushed all the way in until it "clicks" and locks into place. Because it won't operate if the shaft is stopped halfway, some people may jump to the conclusion that it is broken; however, pushing it all the way in will return it to normal operation.

Understanding how your tools work just a little bit can make a difference. That extra bit of care will help turn your rainy-day companion into a more reliable and long-lasting tool.


アンベル株式会社 CEO

執筆者:辻野義宏

30年以上に渡って傘の開発および研究を続けている。革新的な機能を追求し続ける日本の傘ブランド「AMVEL (アンベル) 」では、時代によって変化するベストを追求し、最先端の技術を駆使した傘をお届けしています。