‘constrained ball’
‘constrained ball’ is a drawing aid created by korean product designer giha woo. once attached to the pen, this device helps to draw straight lines without using a ruler. normally, a ball point pen rolls freely in accordance with the ball located at the tip of the pen. however, this writing tool prevents winding lines by helping to move the ball in one direction only. using the installed measuring wheel indicated on the product, users can draw the exact desired line length in both a horizontal and vertical direction, as well as strokes in 45 degree angles.
the mounting area is made with a flexible rubber material helping it adhere to the attached pen.
measurement of line is indicated on the product
GIHA WOO (6)
Jun 28, 2014
Sep 26, 2011
May 02, 2011
Mar 02, 2011
Feb 07, 2011KOREAN DESIGN (98)
Aug 22, 2021
Jun 21, 2021
Jun 09, 2021
May 09, 2021
Mar 06, 2021PRODUCT LIBRARY
Nov 23, 2021for this anniversary, the designers created eleven unconventional custom-made models to demonstrate just how flexibly the chair can be used.
connections: +350
Nov 15, 2021'this research aims to take advantage of the natural phonaesthetic connections people make between sonic and visual elements,' explains the designer, william shaw.
connections: 40
Nov 11, 2021this compact scooter is suitable for older dogs, dogs with weak legs, or simply for the lazy ones.
connections: +420
Nov 10, 2021the designer focused his design on 'giwa' - the symbolic roof tiles of the old korean house model known as 'hanok'.
connections: +2060
amy Nov 17, 2013 Edna Apr 24, 2013 Celeste Mar 23, 2013 Ashraf Hendawi Feb 20, 2013 Beth Jan 20, 2013 mariana.wolf Aug 14, 2010 Nadia Aug 14, 2010 wayne Aug 14, 2010 cvvc Aug 14, 2010 Esraa al sharaa Aug 14, 2010
more commentsHow do I buy this??
I think this is a great tool as I do art work and sign writing and sometimes rulers slip or get in the way. I know I would use it quite often
This is actually a really good idea – I know that sometimes when I’m inking a straight line with a ruler, the ruler will smudge the lines and I’ll have to redo the page all over again. so in these kinds of circumstances having an aid to draw a straight line that won’t impact the line itself would be fantastic!
Hi. could you please let me know how can i get the constrained ball
Thank you
Is this item commercially available for purchase?
oh my god i need one of this!
So i have to change my grip to use it?
Idea has potential.
go straight?
if really… perfect!
love it!
want one!
very great idea !!!!!!