Coupling elements to be used for joining trailer to model or toy car, designed as magnets made of r

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Each of the magnets (4) made of an alloy of rare earth metals like yttrium, neodymium, or samarium and is joined to one end of a tow bar (2). The tow bars (2) are swivel mounted (3) with their opposite ends to the vehicle (1), the trailer (1) respectively. The magnets (4) are provided with a particularly smooth contact surface in order to keep connected even when several toy cars (1) are joined and moved along a curved course, but to be also easily separated by a child.