Device Details

Project Overview

Figure 1: Clamp Mechanism of Re-Stringer

A device had to be created that could attach to a string and not detach during the restringing process of passing through a hood. It also had to pass through smoothly which meant it wouldn’t snag and was stiff that so it could be pushed through a hood, but also flexible so it could curve around the hood. A device was created that was able to be opened for the insertion of the string, and closed so that the string would not detach, and it had a flexible middle and stiff ends because of the extension rod that was chosen which allows quick and smooth passage. The device has 4 parts, the outer clamp part, the inner clamp part, the hinge pin, and the extension rod. It functions by compressing the hoodie string between the ends of the clamp parts, as the clamp parts rotates about the hinge pin, and the ends of the clamp parts contain small 3-D printed hooks which prevent the string from coming out because of tensile forces. The extension rod, which is connected to the tapered nose cone of the inner clamp part, establishes the passage for the Re-Stringer to restring the displaced drawstring throughout the hood without snagging it

Inner Clamp

Figure 2. Inner Clamp Detail

The tapered nose cone was created to ensure smooth passage of the hoodie restringing through the hood. There are 3 sections in the inner clamp part. The first section is the hook section which is 45mm long to accommodate 14 hooks(1mm Height), the locking mechanism of the clamp, and a section for hoodie tips(20mm).The first section of the inner clamp part is 5mm longer than the outer clamp part, to create a tip in the device that can be used to easily open the clamp(45mm). The second section(25mm) is the hinge section contains the pin hole(1.25mm Diameter) for the hinge pin about which the 2 clamp parts will rotate. The third is the nose cone section(29mm) which contains the and the tapered nose cone(11.3mm), and the hole(25mm) into which the extension rod will be inserted to attach it to the device.

Figure 3. Detailed dimension of Inner Clamp, YZ plane

Outer Clamp

  

Figure 4. Outer Clamp detail

The inner clamp and outer clamp are fitted together using a pin-and-hinge assembly. The inner clamp is placed inside of the outer clamp such that their holes line up, and then a pin is inserted through them and secured in place using an adhesive.

The sting is placed in the cavity of the rod, and is held in place by the angled teeth that line the walls. The inner clamp is then closed on top of it, which is also lined with a set of teeth. The device is then locked together, which keeps it closed and secure while the device travels through the hood of the clothing.

Figure 5. Detailed dimension of Outer Clamp, YZ plane

Hinge Pin

Figure 6. Hinge Pin, created by cutting a paperclip

Re-Stringer's hinge pin is a Staples' paperclip. The hinge pin holes have a diameter of 1.25mm and the thickness of a paperclip is 1mm. The hinge pin is as long as the width of the clamp: 8.5mm, and was cut from a paperclip. It is inserted through the hinge pin holes of the two clamp parts and glued at both sides of the outer clamp, so that it will not fall out but still allows the two parts to rotate.

Extension Rod

Figure 7. Shwizadle's BBQ Skewer

A barbecue skewer was used for the extension rod because it was the correct size and relative stiffness, and could be acquired fairly cheaply.  When the skewer is attached to the clamp mechanism it functions very similarly to another hoodie restringing idea called “Re-Stringing It” as shown in the YouTube video below, which uses a rod with stiff ends and a flexible middle.

Reference:

"ReString It - Shark Tank." YouTube. ReStringIt - Drawstring Restringing, 22 May 2014. Web.
07 Nov. 2016. https://youtu.be/RiqCWUa5HdU?t=1m14s