Feedback/critique on an Axis variant concept

[Erik.E]

Hello,
This is my first "real" post to the forum. I would really appreciate some feedback on this concept. General stuff, but also around processes suitable for a project like this.
This is intended to be a small gentleman's knife of razor style with a chisel grind. I intend to have the slider tab cut with waterjet or other process and I'm worried the slider is too small and intricate. To give a rough idea about scale, the slider is 12mm long (about 1/2 inch)

Thanks in advance!
Erik

 

[Lorien]

looks pretty nifty

 

[Mecha]

If the user can pull the tab to release the blade to start closing the knife then release the tab as the blade rotates and clicks to lock it closed, it will be satisfying to use, but if he has to hold the tab back through the whole rotation and can only then release it to lock the blade closed, it could be awkward.

 

[Hubert S.]

I have the same concern as Mecha . It looks like at 32s into the clip, it would bind if the tab was all the way forward. Also, it looks like the blade could be rotated past the closed position to where the edge would protrude from the spine. I guess there is no room for a stop pin because it would prevent the tab from being retracted, but maybe you can add some more meat on the left side of the tab so that the area where the sharpening choil is would hit the tab and prevent the blade from over rotating.

 

[Hengelo_77]

Will there be a spring pushingvthe tab back?
Will that be a place to accumulate dirt and block the system?

 

[Erik.E]

If the user can pull the tab to release the blade to start closing the knife then release the tab as the blade rotates and clicks to lock it closed, it will be satisfying to use, but if he has to hold the tab back through the whole rotation and can only then release it to lock the blade closed, it could be awkward.

If it works as intended the tab would only have to be pulled back in the beginning of folding the blade in. Toward the end of closing the blade, the blade would push back the tab before locking it in a closed position.

 

[Erik.E]

Will there be a spring pushingvthe tab back?
Will that be a place to accumulate dirt and block the system?

Yes, there would be a horseshoe-type spring like the original axis lock. it can be seen in the video, but I have not been able to make it work as an actual spring in the software yet. You bring up a good point. I will think more about how to make it either easy to clean or try to minimize the opportunity for dirt to get in, but I guess lint finds its way in anywhere.

 

[Pinoy Knife]

ok so it looks like you want to use a "Stop Pin " for the open position.
but not for the closed ?? the job of the "Stop pin" is just that to Stop the movement.. either open or closed
if you want a sliding lock for the open position fine but it should be designed with the "Stop pin" in the way so to speak
the sliding lock looks like it could easily be made on a milling machine.. you could also likely use a block as its guide instead of 2 separate pins.
this might make the slider a little more stable so it is less likely to tilt in movement..
id be more concerned with the amount of metal acting as the lock to prevent the blade accidently moving when locked into place...
maybe more of a wedge shape to match the back of the blade ?
but hey its your knife/your design....

 

[Erik.E]

ok so it looks like you want to use a "Stop Pin " for the open position.
but not for the closed ?? the job of the "Stop pin" is just that to Stop the movement.. either open or closed
if you want a sliding lock for the open position fine but it should be designed with the "Stop pin" in the way so to speak
the sliding lock looks like it could easily be made on a milling machine.. you could also likely use a block as its guide instead of 2 separate pins.
this might make the slider a little more stable so it is less likely to tilt in movement..
id be more concerned with the amount of metal acting as the lock to prevent the blade accidently moving when locked into place...
maybe more of a wedge shape to match the back of the blade ?
but hey its your knife/your design....

Thank you for your feedback. The slider is intended to act as a stop for the closed position. I have considered the block idea also but was hoping to get away with pins only because it would be a little easier to make holes rather than slots and be able to just use standard size pins. Hoping I will get a chance to prototype this way then move to block if it tilts or gets hungup.

 

[Danke42]

Does it have one single slab? Because if it has one single slab it looks way too much like a Panchenko Dog Tag.

 

[Erik.E]

Does it have one single slab? Because if it has one single slab it looks way too much like a Panchenko Dog Tag.

Had to google that. I see what you mean, but no. it will have to handle scales, and I might make the final design more sleek and elongated compared to this sketch.

 

[Mecha]

I have the same concern as Mecha Mecha . It looks like at 32s into the clip, it would bind if the tab was all the way forward.

Yes that's what I was trying to say but it came out dumb. It looks like the tab will block the blade from closing unless it's pulled back again. If the blade pushes the tab out of the way by itself as the OP intends, it will be cool IMO.

 

[Hubert S.]

Yes that's what I was trying to say but it came out dumb. It looks like the tab will block the blade from closing unless it's pulled back again. If the blade pushes the tab out of the way by itself as the OP intends, it will be cool IMO.

I think what you said was perfectly clear, but my concerns about where the blade stops were poorly expressed.

I did not realize that the round section on the tab is supposed to provide both the closing moment and the stop for the rotation. I think this might be difficult to adjust for a variety of reasons. I have added a sketch below to illustrate what I meant in my previous post. To provide a stop for the blade that can easily be adjusted, I would modify the tab as shown below. This would allow you to set the closed position similar to a slipjoint by modifying the kick.

There are two areas where I think gaps are needed. To ensure that the tab exerts a closing force, it should not bottom out on the pin as in the drawing. Also, if the tab is modified to lock the rotation at the kick, there should be a gap at the bottom of the tab.

 

[Erik.E]

I think what you said was perfectly clear, but my concerns about where the blade stops were poorly expressed.

I did not realize that the round section on the tab is supposed to provide both the closing moment and the stop for the rotation. I think this might be difficult to adjust for a variety of reasons. I have added a sketch below to illustrate what I meant in my previous post. To provide a stop for the blade that can easily be adjusted, I would modify the tab as shown below. This would allow you to set the closed position similar to a slipjoint by modifying the kick.

There are two areas where I think gaps are needed. To ensure that the tab exerts a closing force, it should not bottom out on the pin as in the drawing. Also, if the tab is modified to lock the rotation at the kick, there should be a gap at the bottom of the tab.

Thank you so much for taking the time to do this. I really appreciate that. I see what you are saying and it makes a lot of sense.

 

[Mecha]

I think what you said was perfectly clear, but my concerns about where the blade stops were poorly expressed.

Well, I think what you said was perfectly clear, but my concerns about the locking tab on the slide blocking the blade from closing without being pulled back, rather than sliding smoothly and clicking into a locked position were poorly expressed.