The yoke which connects the eyepieces and keeps them aligned as the focus changes is damaged. If you can easily move one eyepiece back and forth with respect to the other then the yoke has broken, if not then it's bent, probably cracked and waiting to break.This is probably the most common fault on most binoculars, and it's usually uneconomic to repair.
If bent, the yoke *might* be able to be straightened, but it will be weakened and the alignment afterwards will rarely be spot-on. If broken, then the yoke must be replaced professionally but the repair often costs more than replacing the binoculars with new. The break cannot be simply glued: the contact area is too small to carry the loads it has to carry, and you also usually find that the yoke bent before breaking anyway so you then have all the same problems as you do with a bent yoke.
The fragile nature of the yoke is why binoculars must always be inserted into their case with the objective lenses facing down; this avoids shock loads on the delicate yoke assembly.
If you have a telescope and binocular repair specialist located conveniently to you then it may worth getting an estimate for repairs, but there are few these days with the skills to do so. Minolta no longer exist, so spare parts will be almost as scarce as rocking horse droppings. But if you're in the UK, then visit or phone
Kay Optical for advice.
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