Chair With Rotatable Seat and Adjustable Height - Make It Move

This chair is a product that is usable by all ages because of its adjustable height. Also, the rotatable seat is a nice addition and helps you swivel and see whatever you need to see.

This fits into the Make it Move Category because:

It contains a moving tube that changes the height of the seat
It can swivel the seat.

The USP of the chair is how it has a table as well as a seat. Along with this, it contains a hole from which wires can pass through. This prevents cluttering on the table.

Supplies

All you need is a TinkerCad Account. It is completely free, and will help significantly in school, just as it has with me!

Step 1: Base and Footrest

I first started by creating to cylinders, one with a diameter of at least 30mm larger than the other. Bear in mind that the smaller of the two will be used as a footrest. The thickness of the two will be to your personal taste but I used a height of 5mm. Use the aligning tool to get them in line and bring in a cone. Attach the cone above the larger cylinder so that it looks similar to the second photograph. Move the smaller cylinder up to a height of approximately 300mm above the workplane and bring in a third cylinder. This cylinder should be a hole and should have a diameter of around 30mm. Make it as tall as you like, as it will be grouped later on. However, it must go through both of the cylinders. In my example, I have used a wire mesh-based design for the footrest. To do this ( not the most perfect way) I used two lines of text with the letter I - see figure 4 - and merged them. By using a cylinder hole, I cut through the footrest and grouped the 'I' sentences with the 'ring'

Step 2: The Stem

Copy the tube hole from before and paste it as a solid. Paste another cylinder and decrease the diameter by at least 2mm. Copy this and keep one aside for later use. For now, we can pretend that this is not here. Use the alignment tool and make the two cylinders so that the hole is inside the solid at the centre. Group the two and you should have what looks like a tall ring (similar to figure 1). Use two additional cylinders to make holes in the solid (only on ONE side). These will be used for the height adjustment. It should end up something like figure 2. Bring back in the shape that we put on the side earlier, and make its height a bit taller than before, around 20mm. Put together a spring and a paraboloid, to create something like figure 3. Just remember, the diameter of the shape should be the same as the hole that you made on the cylinder. Place the spring onto the taller cylinder, in line with the bottom hole (on the shorter cylinder). Just like figure 4. Align the two tall cylinders so that the taller one is inside the shorter one. That is your stem. To finish it off, add in the previous step.

Step 3: Rotator

This is definitely an important part of the chair. To start, take a look at figure 1. I have used a screw as a hole to create an internal thread. This will be used to rotate the chair. Get another screw - this time as a solid. Like in figure 2, get a cylinder at a height of around 0.5 mm. Inside it, create a hole with a diameter at least 1mm larger than the screw. Put two cylinders on either side (I have used a diameter of 3mm). The three cylinders that we have created will be used to control how much the chair can be rotated. When it touches the stem, the chair will be unable to go further. This will be the attached by screwing it into the internal thread.

Step 4: The Seat and Table

Start by creating a cone that is quite low, around a height of 15 mm. However it should have the diameter that is 1mm bigger than your seat. Directly above the flat side of the cone, place a cuboid (the seat) of about 20mm in height. You could add a cushion as well to make it more comfortable. On the right (or left) side, create a parallelogram. There are two ways to do this:

Use another rectangle and use two (hole) triangles to cut the negative space.
Use a small rectangle and place two triangles beside. Look at images 2 and 3 for further examples.

Place one more rectangle above that as the table. Also, add in a hole at the end so that wires can pass through. Place this on top of the rotator to finish it off!