
die Klinke
door handle
A usually L-shaped handle on a door that you press down to open the door.
Er drückte die Klinke herunter und trat leise ins Zimmer.
He pressed down the door handle and quietly entered the room.
handle / jack
Loading your saved state.

door handle
A usually L-shaped handle on a door that you press down to open the door.
Er drückte die Klinke herunter und trat leise ins Zimmer.
He pressed down the door handle and quietly entered the room.

to come and go
An idiom meaning that very many people enter and leave a place one after another.
In der Arztpraxis gaben sich die Patienten die Klinke in die Hand.
At the doctor's office, patients were coming and going.

jack
A colloquial term for a jack plug, an electrical connector that is often used for transmitting audio signals, e.g. with headphones.
Mein Kopfhörer hat einen 3,5-Millimeter-Klinke-Anschluss.
My headphones have a 3.5-millimeter jack connection.
For a door, 'Klinke' (door handle) is almost always used with the verb 'drücken' (to press) or 'herunterdrücken' (to press down). This describes the typical hand movement used to open a door.
Bitte drück die Klinke leise herunter, das Baby schläft.
Please press the door handle down quietly; the baby is sleeping.
The idiom 'sich die Klinke in die Hand geben' (to come and go in large numbers) is a fixed unit. The verb is reflexive ('sich'), and the subject is in the plural because it is always about several people coming and going.
Vor Weihnachten geben sich die Kunden im Kaufhaus die Klinke in die Hand.
Before Christmas, customers are coming and going at the department store.
You can tell from the context whether the door handle or the plug is meant. Words like 'Kopfhörer' (headphones), 'Kabel' (cable), 'Anschluss' (connection/port), or measurements like '3,5 mm' clearly point to the audio plug.
Der Stecker passt nicht, ich brauche eine kleinere Klinke für mein Handy.
The plug doesn't fit; I need a smaller jack for my phone.