Automatic pencil

Last week's answer is "Carbon".Diamond is substance of carbon .
But we cannot use diamond to write . WHY? Because, diamond doesn't have same structure of black lead.The structure of black lead is very weak,so we can write by its peeling off and entering into fiber of paper . But ,you know,diamond is very hard.OK?
Let's watch movie!!"Remodeled automatic pencil　is useless"

Ｓｏｒｒｙ！Ｉｔ　is Japanese movie.This movie seemed to be stupid.
But, you can understand infinite potential of automatic pencil in this movie .If you have a time , I want you to make new automatic pencil. 

This week's topic is automatic pencil and I have two subtopics today.First, I introduce the history of automatic pencil in the world and in Japan.
①Keeran, in the USA, made 'Ever Sharp' public 100 years ago.

It is the first automatic pencil .And Hayakawa Kinzoku(the Japanese major company 'SHARP' at present) sold the first automatic pencil in Japan at the era of Taisyo.In 1960, Japanese company invented and sold knock system automatic pencil.There was no lead expect 0.9 mm lead in these days.So , automatic pencil cannot spread.But 0.5 mm lead was invented and it became to be daily thing.WHY?Because 0.5 mm lead is adequate to write in Japanese.Which size of lead do you use every day ?Maybe , you use 0.5 mm lead.
Second , I introduce  some troubles of  automatic pencil.

1.　You　can't  take out lead from automatic pencil.

First , make sure that there are some lead in lead tank and size of lead. You cannot use 0.7mm lead in 0.5mm automatic pencil .

Is pipe of point bent ? Did you drop or hammer your pencil ? If you did , the pipe transforms . In case that snapped lead  is  choken up , you should get off cone of its top by turnning left and remove ruin of leads from top .

2. Lead withdraw to automatic pencil.

The reason that short lead cannot catch lead fly .But , if your automatic pencil has long leads and withdraw happens , your automatic pencil dosen't have ability of holding lead or ruin of leads attaches to fly and makes it slippery.

3.Leads shakes , when you use automatic pencil .

When leads become short and catch on fly , only one pipe holds lead. So, leads shake. Long lead don't shake . Because long lead is holded by both pipe and fly .

4.Lead is easy to snap

Does your automatic pencil have loose top cone? Loose top cone causes snapping lead. And , make sure whether top pipe is bent or not.

Next week topic is "Automatic pencil part 2"
I want you to investigate automatic pencil yourself.
So , I make question for it .
Question
Please look below three pictures.
When you search "シャーペン（Sharpen/Automatic pencil）" in google , you will find only one of these pictures on web page.
Which is it???????Please search and check!!!!

①This picture is 龍蝦片


②This picture is pencil

 

 

 

 

③This picture is　koara