Shortened jack as Keylock

I use the headphones now been several weeks.
At the beginning I have been very annoyed by the large control button on the right earpiece.
When carrying in your pocket, the headset turns on and gets partially to the last numbers dialed. I was wondering why you do not integrate a simple key lock in the price can be expected that, in my opinion.
Then I noticed that the entire operation is off to the ear once you plug in the phone cable. I have found me an old phone cable, everything superfluous pinched, the "jack residual" I now put the headphones when not in use and have so the missing key lock.
Perhaps the tip helps someone more ...