Dual Action OTF Hidden Blade (Assassin Style) by Stonedge

Last crawled date: 2 years, 12 months ago

Current Status
Update 10/17/2017
Some of you ask if I could add a ring, so here the result... I made a connor(templar) style ring. Size of the design is ring size 10(62) so dont forget to scale it to your needs (finger) enjoy!
Update 4/9/2017
HI so following comments about issues... I've uploaded fixed part!
-Outer Blade bottom: sorry my bad the latest version was missing the under channel for the rubber band so I re-up the correct version...
-Main Body: I've Re-up the last version that I've print and work... since some people mention me some mesh defect...
-Ratchet Wheel and Gear: Remove rubber band hook on the wheel (historical reason) so it's stronger and easier to print. Also change the radius so more flat space for the pla spring...
-Optionnal Dual Side Inner Blade: Blade design to be printed on his edge (brim recommended) so you could be kick-ass on both side :) ... but harder to print...
Special Thanks to BP94 and Toa_Firox for there respective constructive comments!
Update 1/24/2017
I've just re-uploaded the fixed switchplate (shorter release curve), and removed the ratchet latch (has been replaced by the pla spring ... and it work a lot better)
Update 1/4/2017
Happy New Year :) ! ... I've just added the new design for the ratchet latch... currently in testing but seem to work really nicely!! enjoy!
I've also added a version of the blade latch with no hole... some people have issue to print the original one so i've add a version without the pivot hole...(manual drilling required)... but if you could you should try to avoid using those... normally over a stadard 0.4 nozzle printer those latch print nicely envent at 0.2 layer (0.1 recommended).
Update 11/28/2016
After my weekend's test I've concluded that my prior double hook carriage was a far better design... so i've just updated the stl... (last design was functionnal ... but i've been force to add a drop of hot glue to ensure rubber band stay in place.... this old/ new design was better and work without any help... so this is fixed.
I've been able to assemble a complete working device, some sanding was required... now i start printing the complete design and start documenting assembly...
Update 11/2/2016
Ok, First I've made a thickness calculation error over the latest outer blade top which is now solved.
The double hook latch beat gravity easily! In your Face Gravity! :D... my problem was related to friction against the front stop block... So I've modified the blade to fix that.
The Inner blade double latch work well... but a little weak so I've fix that too...
Fix clearance issue around hook on the switch plate (I was forced to drill a hole next to it to fit the band.... not needed anymore)
I've design a new switchplate double hook carriage that is easier to print and stronger by design, I'm also think of applying same concept over the switch plate itself... could enable a better power adjustment(not sure if its needed... since it currently work very well)
I've also added a new BETA main body low friction edition. would test it over next days...
Change Log:
Fixed Switch Plate.
New Switch plate carriage.
Move Foward the rubber band track on the outer blade so the latch of the blade would be stronger.
Fix some tolerance issue
Incoming:
New Rack Hook design.
Slimmer Ratchet System and slimmer middle plate.
Hole to insert hex nuts to the back for easier assembly/de-assembly.
look to take this design a little smaller...length/width/thickness
Update2 11/2/2016
New Rack Hook design
Ratchet latch tolerance fixed (not yet tested)
MAJOR UPDATE
I've move the main flipper rubber band from bottom to middle plate, this solve the time to time rubber band obstruction, it's now easier to assemble and enable me to slim the system by 2 mm :).
I've also fix the channel for the rubber band on the blade (wider).
Tolerance on blade, latch, rack and gear as been adjusted too.
The only real issue remaining is the join of rubber band an the switch-plate + Carriage... currently it work but require glue to keep them in place ... and the carriage part is hard to print cleanly.
I'm in my way to test 2-3 option: hook on both part, sandwich the rubber band between two part (carriage split in two slim part) ... if you have any other idea feel free to comment :)
I know that I could set the ratchet part to 2mm thickness... And a would probably do it... as soon other issue solved... I would probably be able to take the complete system under 20mm thickness(but since I like the blade as is, it would be hard to go under that...) :)
Update Beta Hook Version
I've just add an hook version of the switch plate.... not yet tested.... Update 27/10/2016
Finally I've found the solution for the rebber band hook of the switchplate...and now i need to found a usage for my ~10 switchplate prototype i've print... lol...
Add gap for flipper in main plate and tune flipper
Update 27/10/2016 part two
I've just added an double hook version of the switch plate... with one hook its hare to find rubber band strong enough to beat gravity so double hook is here :)
* Update 29/10/2016 My fight against gravity**
OK so the previous double hook switch plate wasn't working very well... so here a new version that should fix those issue... the new double hook is design to use a single longer rubber band.
I also modify the blade(inner/outer) to limit resistance and make blade latch easier to print ...
on my way to print and test them,,, hope I would say your face gravity :)
Update 31/10/2016
Fixed the thin wall of the double hook system... looking good to solve the gravity issue :)... if this didn't solve the case, I would slim done a little outer blade to limit weight of the blade... I know using the single hook version with a metal spring work well but my plan is to do the complete thing without any special part... 1 paper clip and couple of rubber band.... that's my plan :)
Original
Since I have an overstock of rubber band, I was looking around for something to complete my medieval vambrace (My Other Designs). I didn't find what a was looking for...(didn't have time for special order of specific spring, special part etc...)
THIS IS A WORK IN PROGRESS!! Currently it seems that some tolerance is too small so it need sanding to make it work... also currently the resulting thinkness of the complete system is a little big in my point of view....
I use smaller air rubber band from dollar store... but it seems that they worn out really fast when use for the main blade extension/retraction... so I keep them for blade latch and Flipper .... but i'm currently reworking the cad to enable the use of something stronger for the blade I've Just updated the Switch Plate and carriage :) (currently rack use standard rubber band which do the job well)
The Switch plate and switchpale latch have Change!!
Special thanks to InDeepPainReborn for his impressive how-to made an hidden blade in wood...this was really usefull and help me to design mine...
Also I'm currently working on another latch system for the main blade...Now working to slim down the model...
Resulting Blade Look Great... I plan to finish the design before Halloween :)
Hope you like it :)
Update !!!
I've just update some part to add some tolerance for limiting required sanding....
MY BAD!!!
One of the updated Stl(switchplate) was missing on of the 45deg rail on one end.... its now fixed, sorry everyone for that...