Searching \ for '[EE] Spring Contacts for devices Off the shelf or' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=spring+contacts
Search entire site for: 'Spring Contacts for devices Off the shelf or'.

Exact match. Not showing close matches.
PICList Thread
'[EE] Spring Contacts for devices Off the shelf or '
2008\02\28@200852 by Stephen R Phillips

picon face
I am in a project at my company in which we have reached an impasse
with finding contacts for our project. The device is a hand held
instrument with integral battery (IE rechargeable).  It is a SEALED
unit and the battery is NOT user removable or replaceable (this is a
requirement to meet government regulations so it's immutable).  This
means the device requires case contacts AND also require contacts for
charging the unit. It will be operated in a dirty and dusty environment
therefore the contacts need to somehow be self cleaning etc.  The
'vision' that's been tossed about is to chuck the instrument into a
unit with spring contacts that wipe (and therefore self clean).
Contacts need to be gold for low contact pressure and have to have
approximately 2.5mm to 5mm of travel (the more the better because the
contacts are recessed again government regulated ) for the charging
unit.

I've seen similar contacts used on wireless mice etc. However there
travel is quite limited.  Anyone have a clue?  We have a clue as to
what we want we just don't want to become experts at making contacts
(we already have more work than we can get done in time as it is) and
have someone make 'our' design.  It would be nice if some one had
expertise in this field so we can get the contacts made or off the
shelf (preferably the latter).

Stephen


     ____________________________________________________________________________________
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

2008\02\28@212017 by John Ferrell

face picon face
I have recently acquired a 2008 Chrysler Minivan with a rechargeable Led
flashlight stowed in the hatchback. It would probably be worth a trip to
your local dealer to check out how they implemented it.


John Ferrell    W8CCW

"All that is necessary for the triumph of evil is for good men to do
nothing." -- Edmund Burke
http://DixieNC.US

{Original Message removed}

2008\02\28@223012 by Jake Anderson

flavicon
face
Take a look at an inductive power transfer mechanism.
Big advantage then is you don't need to punch holes in your case and it
will probably work out cheaper than the magic contacts.

Stephen R Phillips wrote:
{Quote hidden}

2008\02\29@051846 by msi1259

picon face
Stephen R Phillips wrote:
> <snip> the device requires case contacts AND also require contacts for
> charging the unit. It will be operated in a dirty and dusty environment
> therefore the contacts need to somehow be self cleaning etc. <snip>
In medical applications (ultrasound probes, MRI coils), I see a lot of
Hypertronics connectors used.( http://www.hypertronics.com/ ). Was also
looking at the connectors on an wheel alignment machine while my car was
being serviced - the alignment heads plugged into a  connector with a
small hinged cap and what looked sort of like a oiled felt pad that
moved down the contact pins as the female pressed in. Mini USB
connectors seem to stand a fair bit of abuse (mp3 players, camera, phones).

2008\02\29@123755 by Dwayne Reid

flavicon
face
Any chance that you can use the huge pogo pins that Pylon makes?  The
ones I use for some of our test jigs have a pin that is about 0.125"
diameter.  The pin comes to a sharp point and has about 3/16"
travel.  Spring pressure is much higher than normal test-bed pogo
pins - ~200g at start of spring compression, ~450g with spring
compressed nearly all the way.  Pylon # P2447-1C

The pins seem pretty good at pushing dust and debris out of the way
when making contact.  The sharp point does a good job.

dwayne


At 06:08 PM 2/28/2008, Stephen R Phillips wrote:

>This means the device requires case contacts AND also require contacts for
>charging the unit. It will be operated in a dirty and dusty environment
>therefore the contacts need to somehow be self cleaning etc.


--
Dwayne Reid   <spam_OUTdwaynerTakeThisOuTspamplanet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
http://www.trinity-electronics.com
Custom Electronics Design and Manufacturing

2008\02\29@152916 by M. Adam Davis

face picon face
In my limited experience, most interconnects of this type are so
specific that they are almost always custom designed.  This is
especially true in the automotive world.

Try
http://www.google.com/search?q=custom%20electromechanical%20design%20services

or variations thereof.

Also, look at Thomas net, alibaba and other industry supplier
searches.  You may find exactly what you need in China, though you'll
spend a lot of time searching for companies that might have it, and
then discussing it with them (few companies have their full product
line online, so email/phone the ones that might do what you need with
your requirements).  Even if they don't have it as a standard product,
you might be surprised at how cheaply they'll quote you a custom part,
although be prepared for a lot of iterative back and forth design
depending on the company.

And, I hate to say it, but if designing your own be careful about
patents.  There is a _lot_ of patents in this exact area, and while
chances are slim you'll run into a problem, you never know.

Oh, also sell the end result on your website to other companies and
hobbyists.  The OBD-II connecter person on this list makes a killing
because they had to design their own and found out everyone else
wanted them too.

-Adam

On 2/28/08, Stephen R Phillips <.....cyberman_phillipsKILLspamspam@spam@yahoo.com> wrote:
{Quote hidden}

> -

2008\02\29@182003 by Stephen R Phillips

picon face

--- Jake Anderson <jakespamKILLspamvapourforge.com> wrote:

> Take a look at an inductive power transfer mechanism.
> Big advantage then is you don't need to punch holes in your case and
> it
> will probably work out cheaper than the magic contacts.

UL would have a hey day.

This device needs to meet quite a few electromagnetic certifications as
this is a safety device. NIOSH and UL requirements are extremely
stringent. It is going to have a Faraday shield as well as a lot of
other things to remove RF interference before it enters the unit. It's
also an instrument, and very sensitive to electromagnetic waves
(+-300nv  is it's LOWEST sensitivity). It uses the contacts for more
than simply charging as well.  It is an Intrinsically Safe device and
must meet said requirements. It has taken a VERY long time to get it
this far, although electromagnetic charging was mentioned it is simply
not feasible to implement. It also must meet IP65 ratings. Therefore
there will be no holes because it will be a case with a gasket and the
contacts molded into the case itself.

Requirements made it hard enough to just get a battery in it.

Stephen


     ____________________________________________________________________________________
Never miss a thing.  Make Yahoo your home page.
http://www.yahoo.com/r/hs

2008\02\29@190541 by Stephen R Phillips

picon face

--- msi1259 <.....msi1259KILLspamspam.....rogers.com> wrote:

> Stephen R Phillips wrote:
> > <snip> the device requires case contacts AND also require contacts
> for
> > charging the unit. It will be operated in a dirty and dusty
> environment
> > therefore the contacts need to somehow be self cleaning etc. <snip>
> In medical applications (ultrasound probes, MRI coils), I see a lot
> of
> Hypertronics connectors used.( http://www.hypertronics.com/ ). Was
> also
> looking at the connectors on an wheel alignment machine while my car
> was
> being serviced - the alignment heads plugged into a  connector with a
>
> small hinged cap and what looked sort of like a oiled felt pad that
> moved down the contact pins as the female pressed in. Mini USB
> connectors seem to stand a fair bit of abuse (mp3 players, camera,
> phones).
I'll have a look maybe they can make custom (at least they have contact
expertise and mention custom as a possibility).

Stephen

Stephen R. Phillips was here
Please be advised what was said may be absolutely wrong, and hereby this disclaimer follows.  I reserve the right to be wrong and admit it in front of the entire world.


     ____________________________________________________________________________________
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ


'[EE] Spring Contacts for devices Off the shelf or '
2008\03\01@053437 by Richard Prosser
picon face
Charging via a solar cell & comms via infra-red led etc.?

RP

On 01/03/2008, Stephen R Phillips <EraseMEcyberman_phillipsspam_OUTspamTakeThisOuTyahoo.com> wrote:
{Quote hidden}

> -

2008\03\03@043828 by Alan B. Pearce

face picon face
>Take a look at an inductive power transfer mechanism.
>Big advantage then is you don't need to punch holes in your case
>and it will probably work out cheaper than the magic contacts.

Along with saving the hassles of wiping contacts clean ...

2008\03\06@165945 by alan smith

picon face
For pads and the like, Bourns make some, and MillMax for the spring loaded pins.
 
 Inductive coupling for power transfer check out a company called "powercasting", they were showing at CES.
 
 Also look at an article in EDN from July 5, 2007 "power with no strings attached"
 
 These might give you some ideas into solving this particular problem

     
---------------------------------
Looking for last minute shopping deals?  Find them fast with Yahoo! Search.

More... (looser matching)
- Last day of these posts
- In 2008 , 2009 only
- Today
- New search...