Technical name for a pushable hinge

General cycling advice ( NOT technical ! )
User avatar
horizon
Posts: 10415
Joined: 9 Jan 2007, 11:24am
Location: Cornwall

Technical name for a pushable hinge

Postby horizon » 7 Dec 2011, 3:29pm

This might sound a bit daft and I probably know the answer but is there a technical term for the type of hinge that allows something to shift and remain in position simply by moving/pushing it? The obvious example is the bicycle prop stand and there are probably others (such as windscreen wipers when you are changing the blades).
When the pestilence strikes from the East, go far and breathe the cold air deeply. Ignore the sage, stay not indoors. Ho Ri Zon 12th Century Chinese philosopher

LANDSURFER74

Re: Technical name for a pushable hinge

Postby LANDSURFER74 » 7 Dec 2011, 3:46pm

over center lock ,,,,

reohn2
Posts: 40711
Joined: 26 Jun 2009, 8:21pm

Re: Technical name for a pushable hinge

Postby reohn2 » 7 Dec 2011, 3:47pm

spring loaded?
-----------------------------------------------------------

User avatar
horizon
Posts: 10415
Joined: 9 Jan 2007, 11:24am
Location: Cornwall

Re: Technical name for a pushable hinge

Postby horizon » 7 Dec 2011, 3:49pm

Thanks landsurfer - I presume the QR mechanism is also therefore an over centre lock.
When the pestilence strikes from the East, go far and breathe the cold air deeply. Ignore the sage, stay not indoors. Ho Ri Zon 12th Century Chinese philosopher

User avatar
horizon
Posts: 10415
Joined: 9 Jan 2007, 11:24am
Location: Cornwall

Re: Technical name for a pushable hinge

Postby horizon » 7 Dec 2011, 3:51pm

reohn2 wrote:spring loaded?


No, I think landsurfer is right, though some do have springs. There's something around the house that has a spring lock but I cannot remember what it is - weird! Cam locks may also be correct (for that is what is happening).
When the pestilence strikes from the East, go far and breathe the cold air deeply. Ignore the sage, stay not indoors. Ho Ri Zon 12th Century Chinese philosopher

LANDSURFER74

Re: Technical name for a pushable hinge

Postby LANDSURFER74 » 7 Dec 2011, 4:12pm

its an over centre lock , just like wheel spindles and its what keeps the undercarridge down on aircraft when they land, loads are transmitted in a diifferant direction to the un lock loads ,,,, been around since egyptian times ...and prob longer ...

thirdcrank
Posts: 30857
Joined: 9 Jan 2007, 2:44pm

Re: Technical name for a pushable hinge

Postby thirdcrank » 7 Dec 2011, 4:24pm

I don't know the name but I'm at a loss to see what a propstand and windscreen wipers- both of which are held in place by a spring - have in common with a q/r as I understand the term,. which is a cam. the only springs are to help with getting the fork-ends in quickly and easily.

reohn2
Posts: 40711
Joined: 26 Jun 2009, 8:21pm

Re: Technical name for a pushable hinge

Postby reohn2 » 7 Dec 2011, 4:30pm

horizon wrote:
reohn2 wrote:spring loaded?


No, I think landsurfer is right, though some do have springs. There's something around the house that has a spring lock but I cannot remember what it is - weird! Cam locks may also be correct (for that is what is happening).

The more I think about it the more I think L/surfer is right.
-----------------------------------------------------------

LANDSURFER74

Re: Technical name for a pushable hinge

Postby LANDSURFER74 » 7 Dec 2011, 4:36pm

THE CAM Is the motion not the mecanical lock .. the camming action leads to an over centre lock situation.. feel it as you push the wheel spindle lever .. a rise in force..camming action, .. then a drop in force as the over centre lock happens...

snibgo
Posts: 4604
Joined: 29 Jun 2010, 4:45am

Re: Technical name for a pushable hinge

Postby snibgo » 7 Dec 2011, 6:05pm

Not that I understand either the question or the answers (as often happens on these forums!) but it sounds like the type of hinge on some of my kitchen cabinets.

So the answer may be "kitchen cabinet hinge". But probably not.

User avatar
531colin
Posts: 13413
Joined: 4 Dec 2009, 6:56pm
Location: North Yorkshire

Re: Technical name for a pushable hinge

Postby 531colin » 7 Dec 2011, 6:22pm

Toggle latch?

Image

http://www.screwfix.com/p/toggle-nickel-plated-45mm-pack-of-10/15443

Wiki recognises "toggle latch" but I couldn't get "over centre lock/cam" etc to work....probably doing it wrong

LANDSURFER74

Re: Technical name for a pushable hinge

Postby LANDSURFER74 » 7 Dec 2011, 7:08pm

the toggle latch is a classic overcentre lock .... nothing on wikki ... nothing new there then !!!

User avatar
Chris Jeggo
Posts: 203
Joined: 3 Jul 2010, 9:44am
Location: Woking

Re: Technical name for a pushable hinge

Postby Chris Jeggo » 8 Dec 2011, 3:10pm

thirdcrank wrote:I don't know the name but I'm at a loss to see what a propstand and windscreen wipers- both of which are held in place by a spring - have in common with a q/r as I understand the term,. which is a cam. the only springs are to help with getting the fork-ends in quickly and easily.


There is other springiness in a Q/R hub: when locking it the skewer stretches and the rest of the hub is compressed, albeit by almost imperceptible amounts, but this elasticity is vital for the over-centre principle to work.

User avatar
Mick F
Spambuster
Posts: 50984
Joined: 7 Jan 2007, 11:24am
Location: Tamar Valley, Cornwall

Re: Technical name for a pushable hinge

Postby Mick F » 8 Dec 2011, 3:16pm

Sounds right to me.

Over Centre Lock.

Never heard the term before although I'm familiar with the concept. It's a common enough device, and there must be hundreds of everyday applications.

Just been using the pressure cooker to make some stock with leftover chicken and veg ........... smells lovely!
The lid locks by dint of an Over Centre Lock - the spring being the rubber seal, and the lock being the lid/bowl sliding interface design.
Mick F. Cornwall

stoobs
Posts: 1307
Joined: 27 Nov 2007, 4:45am

Re: Technical name for a pushable hinge

Postby stoobs » 8 Dec 2011, 3:52pm

In addition to Landsurfer's explanation, some devices use a detent to lock movable things (technical term) in set positions....and some QRs have a detent (typically a ball-type phooerr snarff snarff) in addition to the over centre action.