Introduction: Hidden Blade Concept

Picture of Hidden Blade Concept

Disclaimer: I apologise for the beautiful title image, its not my concept, mine is ugly and sketchy, run away while you can :D

It seems everyone is making hidden blades that just slide out, or blades which retract on impact...

I think spring loaded ones like those in assassin's creed 2 are cooler.

Sadly, I do not have the materials or skills (maybe) to make a functional one, but I'm sure many of you can easily think up a way to make one and have the skills to bring it to life...

This is what I would do if I had to make a hidden blade.
I want to, but nope, suck at metalwork...

Please play along and check out how my idea goes, I think it's feasible although the one in assassin's creed 2 is probably way more complex.

Hoping someone makes a functional one, cos its cool to know that something like that exists.

Step 1: Explaining My Lousy Concept: Initial Lock

Picture of Explaining My Lousy Concept: Initial Lock

-The blade will rest on a rail inside a suitable container.
-It will be spring loaded and held in place with a latch (the spring type) which can be released by pulling a string, maybe attached to assassin's ring finger?

-Brown square is handle which is used to cock the blade back into place, assume that container has a slit along which handle slides when blade is sprung.

-Hole is for holding blade in place in secondary lock stage.

Step 2: Explaining My Lousy Concept: Secondary Lock

Picture of Explaining My Lousy Concept: Secondary Lock

This is the side view and front of the "thing"

-There is a bolt which slides into the hole in the blade as it springs out from the initial lock position.
-Bolt is spring loaded too
-Supposed to hold the blade in place while stabbing?

-Bolt can be easily pushed back down and handle pulled back to return blade to the initial lock position. For the stealthy assassin to remain inconspicuous -___-

Hope my explanation makes up for the lousy pics.
Come on people I wanna see a fully functional hidden blade, why aren't the pros making these things, probably cos they don't play games XD

[Note]: Had a new idea about the bolt... Read On! :D

Step 3: Explaining My Lousy Concept: a Less Crappy Bolt

Picture of Explaining My Lousy Concept: a Less Crappy Bolt

I was thinking, an assassin wouldn't have the time to stick his finger in and push the bolt back -.-
So I think this might be a better idea.

-The bolt resists the blade from sliding back in on impact, as seen in the picture.
-When the blade is to be retracted, the assassin turns the bolt 180degrees and pulls the handle back...

-With the shape of the bolt, it should slide back down by itself when the handle is pulled back (Probably)


makerboy112 (author)2010-04-28

Altair had his ring fing removed to be an assassin so the blade would not knick his finger.

michaels989 (author)makerboy1122016-08-29

Well, the removal of the finger was only symbolic, representing the sacrifice the blade demands, but I like how you think.

william662 (author)2014-05-20

its awsome

afrocatpro (author)2012-09-24

designing and building a blade that deploys, locks, retracts and locks again with a string attached utilizing an otf style "switchblade" mechanism would be fairly simple with the proper materials and skills and i'm sure already has. i will design one as soon as i can stumble upon the epiphany of how to operate the weapon as done in the game:
- opening without ring and string operation
- blade hand/arm only for operation
- opening with enough force to penetrate a body
- allowing running, climbing and any other rigorous activities or hand movements without opening
-locks into stable position for true thrust and penetrating power
- hopefully non-electrical although that concept, in my mind holds the most potential
any concepts for an operating mechanism to engage/disengage the blade that would follow the mentioned standards would be great to hear.

aweis (author)2011-06-11

since you have it spring loaded, why not weight the blade, so that it can spring open, then to close it pull the string and jerk your arm down and the blade will come down, and the momentum should be suitable enough to push the spring back.

Darthscout (author)aweis2011-07-12

that makes a lot of sense, but how do you get it back in? also if this where real, how ywould the blade go into someone, if it where weighted it would slide back into the holder

nenaptio (author)Darthscout2012-04-23

It would work the same way a dual action otf knife would work.

inoyes (author)Darthscout2011-10-24

i think you could make it so it automatically lock into place when it is deployed, or have a knob that'll allow you to retract it manually with your other hand, cuz quite frankly, lest you're switching from the hidden blade to ur sword mid-combat, you won't need to worry about using your other hand sheathing the blade.... and another might wanna have a way of easily disengaging the mechanism, kinda like having a safety switch on a firearm, that doesn't involve you taking the ring off of your finger, which might accidentally trigger the blade and cause unnecessary injury... and that's the last thing an assassin needs, am i right? lol

Este Loco (author)2012-03-14

it works as a light saber type thing like a flat one though and when it is pulled out the locking mechanism will kick in until you add force you did a very good job of explaining and what most people do is go off num 1. it has a very clear idea of how to make it.

yoshio6 (author)2011-11-18

sorry your mechanism is ok but not nearly as functional as the real blade and there are people on youtube that make better versions not saying yours is bad but there is better

zedman70000 (author)2011-08-11

if the slide handle is on the underside of the blade and the bolt is on the other how would you reach it?

BlutoothV3 (author)2010-12-31

I have some ideas for a clockwork mechanism for extending the blade and then retracting, I also just wanted to add to your idea of locking the blade, a pen would make a prime example, the ones that lock and require a second trigger/button to release it using a spring, maybe a sturdier version would work?

Hope you know what I am talking about xD and hope this helps

spong20 (author)BlutoothV32011-06-09

if your skilled enough to do a clockwork mechanism just use an otf switchblade mechanism.

ajk18 (author)2011-01-24
someone has finally been able to make one and has an video
if someone want to figure out a way so that it doesnt pop out automatically it would be just like the one in the game

cleage001 (author)2010-11-22

You should post this on SINZA-Exotic Automatic Weapon Design.

(YOUR N (author)2010-11-04

(corny joke)
man wearing spring knife: hello can I shake your hand?
Inasant bystander: sure
Man wearing spring knife: skadoosh!
Inasant bystander: arrrrrrrghhhh theres a knife in my hand!
Man wearing sponge knife: mwa ha ha ha ha ha ha!

Me made one dem knife fings me post pics soon!

Sudavar (author)2010-05-26

Well have you considered the "blinds" technology. I mean the one where you strech the rope and the blind goes down and then again if you want it to go up you just strech the rope again until it clicks or whatever.. but then again you'll just have to be carefull not to strech the finger where the rope is going to be.. hope it helped..

deathsavilion (author)2010-03-24

 you need 2 triggers for the blade....a button that you push with the back of your hand on the brace and a ring on your pinky to pull it back need 2 springs and two locks to have it work also...and a clock spring for the coil of the cogs....its pretty simple just need the materials to make it....which i don't have :(

Jayzberg (author)deathsavilion2010-05-01

I like your idea, please draw a picture or something and i will see if i can get it done, i have the materials and id like to work with you,, email me the pic, thanks a ton

I R ASSASSIN (author)2010-02-18

since the bolt has to be twisted maybe u can attach a string to the tiny handle so when the user has to rotate the bolt so it can retract it will be done with a pull of the string...nice concept by the way

dblader (author)2010-01-19

there r several problems with this design the hidden blade needs a spring mechanism that is like a reverse pully its a rope then a gear that rotates when the trigger is hit again its like a spring watch only appiled on a larger scale which works well the rail has to be geared and what ever but the blade can kill then retract

ericnguyen (author)dblader2010-02-18

nice but wont work

I R ASSASSIN (author)2010-02-18

maybe you can keep the old secondary bolt system and use a string to pull it out? just a suggestion...

Neafie2 (author)2010-01-14

great idea of how it all works. but i think that it slides in and out with a flick of the wist in the game. but very cool idea for like a wrist sling shot or durt gun. but very cool

lickpoison (author)2010-01-08

if the bolt could slide over about a half inch, then the blade could be extended Heckler & Koch style, being slapped down to release.

Guardians38 (author)2010-01-03

 i will add to your idea and show you my concept in like an hour btw good job!

saxman31 (author)2009-12-30

 the hidden blade does exist in real life and it functions just like in the game.
they are hard to find but they are sold.

Dudding_j95 (author)2009-12-17

mabey you should make the spring pushing the blade extend and get cought in the bolt then when the bolt is released the blaed will pop back and get cought on the ring release

momento mori (author)2009-12-15

oh, and just to add some insight on my concept, heres how i see it:

if you've ever heard of wheellock pistols, that would provide for the main mechanism of the armblade in itself.
the word 'wheellock' tells you flat out that there is a wheel. that locks. which is essentially all you need. :)

so, simply acquire a wheellock pistol, (not as easy as thought) make a leather brace, lose your ring finger, and attach a blade and a spring to the wheellock part of the gun.

critisizing of/ adding to my epiphany is much obliged.

okoshima (author)2009-11-29

watch your language, this is a pg13 site.
also if you look more you will find better drawings and concepts that do not need to be cocked back. heck ive been working on one for a friend that is more like the in game version where it is only spring assisted out and uses a spring to draw it in.

ilovegm (author)okoshima2009-11-29

Ah, alright, didn't notice that kids these days were completely free from swear words more crude than human excrement -_____-
I have tainted the pure minds of the masses.
Haha, I'll change it soon.

Yep, my concept is Sh**. No argument there.
Your idea sounds great, but yeah I couldn't think of how to create an auto retracting mechanism like in the game. Would love to see yours in action.

But I am starting to build one based on this guy's concept which I found on Sinza forums, you should check it out, its quite the awesomeness.
Doesn't retract auotmatically though.

Am I allowed to link here?

okoshima (author)ilovegm2009-12-09

one guy cracked it with an oversized out the front auto blade (switchblade?)

0xCyrusx0 (author)2009-11-29

I like. If I wasn't already completely consumed with projects, I'd attempt this out of metal and an actual blade.

ilovegm (author)0xCyrusx02009-12-01

I'd be honoured if you tried this, you gotta teach me how to make it if you do.

gmjhowe (author)2009-11-30

 Looks like you have a good idea going there, you may find you get some better discussion, and less criticism if you put this up as a forum topic. 

Its what the forums were designed for.

lemonie (author)2009-11-29

You need to make it, then publish it. If you're after discussion, create a Forum Topic.


Doctor What (author)lemonie2009-11-29

Might also mention that this idea has already been published into an excellent instructable.

There is no real need for a concept, unless they plan on doing it differently.

ilovegm (author)Doctor What2009-11-29

Just sharing my thoughts, although I should have made a working one like lemonie said -.-
Didn't noe this place was that inflexible...

Anyway, like that instructable, most designs do not lock the blade in the extended position.
No harm in proposing a design that does so

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