Is it slip joint?

JINKNIVES

JINKNIVES

Joined
Sep 7, 2021
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83
Curious if it is slip joint knife, but it is definitely not a traditional one? No lock design means carrying it around in places with restrictive knife law is possible, someone may say it has safety issue, how do you think? Will you add no lock knife to your list? Thank you.
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Functionally its more like a friction folder. The detents hold the blade just enough to keep from opening or closing, unlike a slipjoint with a back spring. Once the detente is disengaged the blade will move freely either direction.
This Two Sun 244 has the same detente system. You can flick it open easily with the front tab, and once you figure it out you can flick it closed with one finger just as easily.

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I'd call it a slip joint, since you certainly "slip" past something, but it's certainly appropriate to specify/elaborate that it's a detent system rather than a traditional backspring.

The safety of the knife will depend on the knife. And your common sense, of course. I have a ZT 0235 myself. It felt only kinda secure/safe, so I disassembled it, pulled on the detent tabs a bit to increase the tension. Rather a PITA to reassemble. A slipjoint with detents might feel less safe, probably because it doesn't spring back open (or closed) if you nudge it a bit to the point where it disengages. But in practice, it's really no different, so long as the detent is reasonably positive. Any such knife that's disassembleable should be tweakable to your preferences.

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I like the Shilin styled handle. I'd like to see a more typical blade, also (like the Shilin leaf blade). Drop the flipper tab (I believe enough of the blade will show that you can open it with pinching) and the ball bearing (not needed) and you get a beautiful modern traditional. As long as the detent (open and closed) is firm enough, I need no lock on a folder. The beauty of traditionals is hard to rival but it is entirely possible. Here under a whole family of Shilins. Not mine, alas, and pretty much unobtainium as of now :
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I would also like to see a Shilin-pattern blade, but this looks decent, as it is.

The trouble with these half-scale designs is that you have to have your tolerances really right, and there can't be any flex in the handle slab.

Years ago, I had a little bitty Gerber that used this same half-handle arrangement. I can't recall the name right now, and it's not that important. I liked it plenty well until one day when I dug my hand into my pocket for something else and caught the tip against the side of my hand. Lucky for me, my sharpening sucks, or it would have opened a long gash.

As interesting as it is, I would want a fairly substantial redesign of the scale/slab to protect my fat hands from my skinny pockets.
 
I can't say for sure but it looks like the tip of the blade would rest quite deeply in the channel. While the "open frame" build isn't a favorite of mine, I must admit that all mine have been perfect. And so easy to clean and keep clean ! I love the hollow grind of the blade but the pattern makes me think instantly of ZT. It's a good shape, very versatile, no doubt, but I'd really love to see something different, maybe more traditional.
 
Thank you so much for your thoughts, I will update its description to double detent system. Yes, it is without backspring, it does like friction folder when open and close, here are more photos. This one is not traditional one, even the G10 handle is 3D printed, hahhh :)
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I can't lie, this is a very nice knife ! Honestly, you can forget the flipper tab (yes, I know it's all the rage now...) but I'm sure this knife can be shaken open safely (healthy portion of hollow grind to grip) like we did in the old days with the Buck 110, for example. Needs a little bit practice but way more fun than flipping with the tab. If you can live with something protruding from the frame when closed, then you could straightly go for a true friction folder (with a small lever, no bearings, but keep the open & closed detent and by all means the bolted pivot to be able to adjust the friction).
 
herisson said:
I can't lie, this is a very nice knife ! Honestly, you can forget the flipper tab (yes, I know it's all the rage now...) but I'm sure this knife can be shaken open safely (healthy portion of hollow grind to grip) like we did in the old days with the Buck 110, for example. Needs a little bit practice but way more fun than flipping with the tab. If you can live with something protruding from the frame when closed, then you could straightly go for a true friction folder (with a small lever, no bearings, but keep the open & closed detent and by all means the bolted pivot to be able to adjust the friction).
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Thank you for saying that :) This knife can be shaken open safely. Actually, the flipper tab is not very protruding, but if you don’t get used to it, I do have one (also double detent system, no lock) that opens as below shows or it can be opened by thumb stud. Open the knife in the way as below feels better.
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This one looks very, very nice ! I love the "agricultural" scales ! The flipper tab is diminutive enough as to not block a streamlined use of the knife. Honestly, ditch the thumbstuds. It's redundant and totally un-needeed on such a lean-designed knife. The "huge" accomodation for a lanyard or a fobble is just too big. A simple hole, with a riveted tube, or not, is nice enough.
 
herisson said:
This one looks very, very nice ! I love the "agricultural" scales ! The flipper tab is diminutive enough as to not block a streamlined use of the knife. Honestly, ditch the thumbstuds. It's redundant and totally un-needeed on such a lean-designed knife. The "huge" accomodation for a lanyard or a fobble is just too big. A simple hole, with a riveted tube, or not, is nice enough.
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Thanks :) Linen Micarta does give out unique look. Thumbstud is designed for more opening preference, but the knife indeed, will look more clean without it.Thanks for your suggestion about the lanyard, in fact, we thought about a small and simple lanyard hole at first, but finally we used this big one that can be attached to carabiner, and same Matt finish as the blade, we thought it would be nice😂😂
 
Don't think too much about the market, think about your own achievement. You're welcome !
 
I like the look of the skeletonized back. Might be less comfortable for long use though? You can test it out..

Maybe keep the feature, but not as large if it becomes uncomfortable.

The second knife looks comfortable and fun.

Congratulations! These are interesting designs.
 
herisson said:
I'm sure this knife can be shaken open safely (healthy portion of hollow grind to grip) like we did in the old days with the Buck 110, for example.
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Wouldn't being able to shake or flick it open using only hand/wrist motion regulate it to the realm of the "dangerous gravity knife" in jurisdictions such as NYC, Kalifornistan, and others where gravity knives are banned/Illegal?
I know Buck changed the 110's pivot geometry in either 1965 or 1966, so the blade couldn't be opened with a quick flick of the wrist, or shaken open while holding the handle.

JINKNIVES JINKNIVES
Why one hand opening?
Aren't there some European and Asian (and possibly African) jurisdictions that ban or prohibit one hand opening?
 
jerok8 said:
I like the look of the skeletonized back. Might be less comfortable for long use though? You can test it out..

Maybe keep the feature, but not as large if it becomes uncomfortable.

The second knife looks comfortable and fun.

Congratulations! These are interesting designs.
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Thank you😁 Those two have comfortable grips, except the first one (black/white G10 handle) may be smoother feels in hand than the second one (linen Micarta handle). The big lanyard hole is not a problem if you look from below view, it is wide enough to not feeling protruding or something.
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afishhunter said:
Wouldn't being able to shake or flick it open using only hand/wrist motion regulate it to the realm of the "dangerous gravity knife" in jurisdictions such as NYC, Kalifornistan, and others where gravity knives are banned/Illegal?
I know Buck changed the 110's pivot geometry in either 1965 or 1966, so the blade couldn't be opened with a quick flick of the wrist, or shaken open while holding the handle.

JINKNIVES JINKNIVES
Why one hand opening?
Aren't there some European and Asian (and possibly African) jurisdictions that ban or prohibit one hand opening?
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Well, one hand opening is quite normal. I heard that Denmark ban slipjoints, and some other countries in Europe ban spring-assisted knives or knives with lock. :)
 
JINKNIVES said:
Thank you so much for your thoughts, I will update its description to double detent system. Yes, it is without backspring, it does like friction folder when open and close, here are more photos. This one is not traditional one, even the G10 handle is 3D printed, hahhh :)
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Wait, do you know what G10 is? By definition it can't be 3D printed.........
 
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