Zebra released the mechanical pencil "Delguard" in November, which "doesn't break the core no matter how hard you put it." When I went to the stationery department to find out that it was amazing, it seems that mechanical pencils that do not break the core are already available from various companies.

I don't remember much trouble with the lead of the mechanical pencil breaking, but if I overcome the only weakness (?), It can be said that it is an invincible item. I decided to buy as much as I could and compare the strongest ones.


◆ The secret of "not breaking" is wonderfully three companies

The mechanical pencils I bought this time were Zebra's "Delguard" (450 yen, center of the image), Pentel's "orenz" (500 yen, on the image), and the platinum fountain pen "OLEeNU SHIELD". ) ”(200 yen, below the image).


The "non-breakable" structure described on each package is three companies and three. The Nobel Prize wouldn't be a dream if the three companies cooperated to create such an idea in a small space called a pen tip ...? I will take a closer look one by one while keeping my chest from getting hot.

◆ "Delguard" with outstanding protection


Delgard features an internal mechanism that guards the core according to various writing pressures and writing angles. If you apply force from directly above or diagonally above with the core extended by 2 to 3 mm, you can clearly see that the internal spring and the metal part at the tip operate to protect the core. I felt that the force applied for writing was absorbed like a cushion.


By the way, it was written that "If you knock 4 times or more and write it, it may break", so I knocked it 5 times and wrote it, but there was no sign that it would break at all.


The writing comfort is solid and stable, and it can fill a wide range quickly, so it will be suitable for mark sheets. However, since the grip part is the thickest and hardest of the three, writing for a long time may make your hands tired.


◆ "Oh Reine Shield" which is the most "no discomfort"


The O'Reine Shield supports the core with two points, the tip part and the part that pulls out the core, and four parts are attached so as to fill the gap between the two points. It holds the core firmly on three sides and has a structure that does not break the core even if an impact is applied. … It seems to be a more complicated structure than it looks.



Of the three books this time, the writing comfort is the most comfortable, and in a good way, it is as smooth as a normal mechanical pencil. The rubber grip is non-slip, so you won't get tired even if you write for a long time.


By the way, when the writing part is gone, you can press the pen tip against the paper once and the core will come out, which is convenient. There is also a sense of security that the metal parts at the tip are stored when not in use. It can be said that it is one with high cost performance including such detailed functions.

◆ Core diameter 0.2mm! "Orens" that can draw ultra-fine lines like never before


The last is Orens. The biggest feature of this pen is the 0.2mm core, which is thinner than the needle. The tip of the metal pipe is smooth so that it does not get caught on the paper surface, and it seems that the core is protected by "writing without sticking out the core from the metal pipe".



As I continue to write, the pipe at the tip naturally slides and shortens as the core decreases. It's about to be difficult to write, so if you knock only once, it will return to the initial state.


The fine and delicate lines drawn from the core diameter of 0.2 mm are my favorite. It seems that you can write fine characters such as mathematical formulas and notebooks neatly. However, probably because of the high writing pressure of the author, it may get caught in rare cases depending on the paper quality, which can be said to be the only difficulty.


Personally, I would like to use O'Reine Shield when writing and memorizing, Orens when I want to take beautiful notes, and Delgard when drawing mark sheets and pictures. The core did not break during use, so you can concentrate on your work. I also feel that I got a glimpse of the wonderfulness of Japanese stationery technology.

* All listed prices do not include tax