Door electrical connector

Thread Starter

jcubie

Joined Nov 22, 2015
4
I am trying to find a connector that physically connects two wires when a door closes. I am not not looking for a switch -- but some type of connector that engages and will pass DC current of less than 20 volts and 5 amps from one wire on the door to another wire on the jam.
 

MaxHeadRoom

Joined Jul 18, 2013
21,404
If wishing to break a conductor leaving the door across the Jamb, why not use a small loop in the conductor between door and jamb and use either the reed sw mentioned or a miniature limit switch to break contact?.
Max.
 

#12

Joined Nov 30, 2010
18,210
As far as I know, there is no such thing as an electrical connector that can be in-serted and out-serted dozens of times a day, under varying loads and speeds, dealing with small changes in humidity or maybe even the building settling, and stay reliable for more than a few months. You can do a sliding contact, that works pretty well, but Ford stopped using copper and carbon contacts in their steering wheel connections and changed to a coiled cable, like a watch spring, because the sliding contact method isn't reliable. The bottom line is that reed switches, mercury switches, Hall Effect magnetic switches, and micro-switches were invented to provide reliability for this kind of need by separating the mechanical function from the electrical function.

There you have it. Take your pick according to your needs. Two slats cut out of a tomato can is good enough if you only need it to last a few weeks.
 

wayneh

Joined Sep 9, 2010
16,399
I am not not looking for a switch ...
Well, yes you are. You want to switch 5A based on the door position. You can sense the door position and perform the switching somewhere else, or use a conventional switch that triggers on door position. Why do you want the door itself to be a switch? I mean, this wheel has been invented. Why do you need something else?

A plate on a spring that mates up against a conductor on the opposite side might work. You need to compensate for a lot of slop.
 

MikeML

Joined Oct 2, 2009
5,444
Most of the door sensors, such as used in alarms, cannot switch 5A directly; more like 100mA or less. You will need a sensitive relay or transistor switch to protect the switch.
 

bwilliams60

Joined Nov 18, 2012
1,342
You can do a sliding contact, that works pretty well, but Ford stopped using copper and carbon contacts in their steering wheel connections and changed to a coiled cable, like a watch spring, because the sliding contact method isn't reliable.
Nothing more than information but we got away from the slip ring/contact setup and went to the clockspring because of airbags or SRS. It has been a great improvement until you put one on and don't center it properly. Not good when the clockspring gets too tight. They have a tendancy to "snap".
 

AnalogKid

Joined Aug 1, 2013
8,589
Most of the door sensors, such as used in alarms, cannot switch 5A directly;
I wondered if anyone else has noticed that.

Generically, connectors that mate up with one or both haves moving around are called blind-mate. There are lotsa of different kinds. Some are rated to 10's of amps, but for only a few hundred mating cycles.

ak
 

strantor

Joined Oct 3, 2010
5,329
I've seen harting connectors used for this purpose before.



It was on multibay cardboard stamping/printing presses. The machine is in several "bays" (sections) that are all on rollers on the same track. The bays separate to get inside and change the die patterns. When you're ready to run the press, the bays all slide together and power/signal circuits are completed through the connectors.

In that application, the plugs are pushed straight into the receptacles. In a swinging door application, it wouldn't be quite straight. Maybe straight enough to plug in/out, but probably also not straight enough to prevent the pins getting bent and the females getting widened.

I cannot guess why you want to do this, but I suggest if at all possible, you don't.
 

Whatashame

Joined Nov 30, 2015
88
Edmond's makes a door jam switch mostly use to turn a closet light on. It usually used and made for 120 volt circuits but it can be use for low voltage. Comes with a steel box that must be reset in the door jam. Has momentary normally open contact heavy duty push button switch. Has 1\2" (7\8") knock out for an electrical connector sold separate. This will last a long, long time. I hope you were not asking for a auto door switch. My first reply to help someone. I'm a retired electrician learning electronics and " Arduino".
 

GopherT

Joined Nov 23, 2012
8,012
The Apple MagSafe connector does essentially what the OP is asking for but slightly less current and, not readily available in non-apple applications. Magnet on the outside positions and the spring loaded gold-plated balls make the contact to gold plated cups on the other side.

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