to the handle bar 3 the connection element 2 can therefore also serve as a handle in the area where the lock 4 is accommodated in this way a handle is available at a far outwardly lying place on the cart thus at an ergonomically particularly suitable position for guiding the cart that this handle at the same time contains the deposit lock is in no way disturbing since it need not project rearward toward the user nor upwardly above the handle the deposit lock 4 itself should be constructed as an interchangeable plug element on or in the connection element 2 it therefore requires a suitable shape or hood which transitions over into the surrounding lock housing as flush as possible only on that side which remains visible following installation into the connection element 2 in the embodiment shown this is the side where the token slot is found of course instead of this the deposit lock could also be incorporated into the connection element 2 from the other side fastening it in the connection element 2 expediently takes place by means of a catch or snap connection it is also possible however to select a form locking connection perhaps by screws the type of construction in accordance with fig4.