** Hardware pack including, nuts, bolts, spring, adhesive and camera thumb screw now available @
NO DRILLING REQUIRED NOW AS I HAVE INCLUDED THE HOLES IN THE NEW STL FILES ATTACHED :)
The LimbBo Cam Buddy
This product was designed by Adam Dengel of the LimbBo Foundation to help children with limb differences (particularly those missing right arms / hands) to use a domestic camera more easily.
My son was born missing his right arm / hand and struggled to use a camera properly. This device I designed enables people to take pictures using their left arm as 99% cameras do not have a fire button on the left hand side.
The device does have the ability to house most average sized cameras. The different long rails on the base plate give plenty of movement both backwards and forwards so you can position your model of camera to line up with the fire pin. I have attached 10 different sizes of pin ends tested to fit on different cameras but you can resize in software such as TinkerCad should none of these fit. This part is interchangeable should you change cameras in the future.
I have tested the following different sized cameras.....
Cannon Powershot sx710HS (5mm PIN)
Cannon Powershot sx210IS (17mm PIN)
Cannon Powershot A3200IS (18MM PIN)
Check online should you need to compare dimensions.
Additional Tools / Equipment Required For The Build
M3 X 25mm Allen Head Bolts x 2
M3 x 22mm Allen Head Bolts x 4
M3 Nylok Nuts x 4
M3 Standard Nuts x 2
1/4 Thumb Screw (Camera tripod mount bolt)
These can all be found quite easily online
The total cost for this build is around £9
60% (mechanism base 100%)
Ensure instructions are followed to which bolt sizes to use with which part as they differ according to the length required.
Step 1 - Print
Using the attached STL files, print all the parts with auto generated supports. I used varied colours but you can print in one colour if it's easier.
Step 2 - Hardware
Ensure you have all hardware ready as stated above and lay out the printed parts roughly where they need to be.
Step 3 - Frame Construction
Align the holes in the handle, side frame right and base.
Double check everything is inline by sliding a 3mm x 25mm allen head bolt through through the 3 sets of holes. If everything is lined up, dab some glue between the parts, insert both bolts and tighten with 3mm nylok nuts.
Repeat this process for the side frame left piece with 22mm allen bolts to attach it to the base.
Next take the Mechanism baseplate, align to a central position and using a generous dab of glue, secure to the 2 adjacent shelves of the side pieces.
(ENSURE THE MECHANISM IS THE CORRECT WAY ROUND AS PER PICTURES BELOW BEFORE GLUING!)
Step 4 - Installing The Mechansism
Next take a 15mm x 4mm spring and place in the mount on the mechansim base plate. (if you cannot find this exact spring you can cut a longer one down to size using wire cutters). Next take the fire arm part and insert the other end of the spring into the mount.
Push down lightly so the spring depresses until the holes in the mechanism base plate and fire arm are aligned.
Insert a 3mm x 22mm through this hole and tighten with a 3mm standard nut, blob the end with glue so it doesn't come loose (Nyloks are too large to fit the cover over).
(DO NOT OVER TIGHTEN AS MECHANISM WILL BE TOO STIFF, TEST BEFORE GLUING!)
Repeat this process for the Lever arm (please note you will have to depress the fire arm down and ensure the lip of the lever arm is below that of the firearm as shown.
Finally add the fire button to the end of the fire arm pin, this should be a snug fit and just push on but to be extra secure add a dab of glue.
Adding The Camera
Finally using a 1/4'' thumb screw, put this through the centre rectangular hole in the base plate and screw it into the tripod thread on the underside of the camera.
Move the camera along the rail until the fire pin is roughly over the fire button of the camera and tighten the thumb screw.
If the fire pin doesn't reach the camera's fire button when depressed, try printing the longer Fire Pin files until sufficient contact is made with the button when depressed.
As you can see in the photos the pin will look lightly offset in the normal position with around a 2mm gap from the camera button. When the lever is pressed it should make just enough contact to trigger the camera with minimal force and be perfectly aligned, if it's difficult to press down and the mechanism plate moves then the pin is too long.
I can create an exact length one and send you this via email should all 10 of those pins be unsuitable, all I need is the measurements from the original sized pin to your fire button whilst stationary. DO NOT GLUE THE FIRE PIN IN, as you may need to swap it out later, they are designed to be a snug but removable fit.
I have also included a 4mm long attachment with a smaller dome end for camera buttons that may be small in diameter. Just glue this to the end of one of the fire pins if required.
Test the unit, if all is well, place the hood over the mechanism. It fits quite snug and doesn't move if done correctly so I suggest not gluing this part so you can get to the mechanism if required.
I have added a file with a LimbBo nameplate, It would be fantastic if you could add this to the front of the hood to support our work for limb different kids, but you are welcome to create your own.
For any additional support or advice, please send me a message and I will be happy to help :)
STEP 2 - HANDLE
STEP 3 - FRAME CONSTRUCTION
STEP 4 - THE MECHANISM
STEP 5 - ADDING THE CAMERA AND ALIGNMENT
STEP 5 - FIRE PIN ALIGNMENT
STEP 5 - ADDING THE HOOD - COMPLETE!
NOTE LONGER FIRE PIN END FOR THIS DIFFERENT CAMERA