buckle structure (41), which is equipped to connect with a belt (30),where the buckle structure (41) has a connecting connection (413),where the connecting connection (413) has a connecting element (44) for connecting to the belt (30),where an extension section (414) extends from one side of the connection connection connection (413),where the extension section (414) has an opening (415) through which the belt can pass (30); andwhere the belt (30) passes through the opening (415) for insertion into the connection connection connection (413) and for connection with the connection element (44).
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