My son iPad is not charging. The charger pin can not entering..so the iPad is been dead for sometime cos no charger can enter

it can be

1. dirt, lint debris stuck in the connector of the ios device which needs to be cleared out
2. a damaged connector in the cable one attempts to insert
3. a damaged connector in the ios device disabling the cables connector to be inserted

My issue was a piece of the end of the charger cord tip was lodged in the port, looks like a mini staple!! check the tip of the charger cord to see if the metal frame end is missing. I used a curved tip nail file to pick the tip out and it charges fine now.

If the cable is damaged - as illustrated in your photo - the cable should be discarded and not used to charge the iPad.

The illustrated cable is of poor quality - and certainly not of Apple origin. Use of cheap/uncertified cables is false economy - and risks major damage to the iPad. A damaged iPad is very expensive to repair - the cost being orders of magnitude beyond that of even the most expensive certified cable!

That is the same for me.