Structure for integrating down tube of electric bicycle with battery box

A structure for integrating a down tube of an electric bicycle with a battery box, comprising

• the down tube and the battery box;
• wherein
• the down tube has a hollow straight tubular tube body and two fixed bases arranged in an inner cavity of the hollow straight tubular tube body at intervals along a lengthwise direction of the hollow straight tubular tube body;
• a receiving cavity is bounded by the two fixed bases and the inner cavity of the hollow straight tubular tube body;
• the receiving cavity is provided with an access opening on an outer side surface of the hollow straight tubular tube body;
• the access opening extends along the lengthwise direction of the hollow straight tubular tube body, and the access opening is configured to allow the battery box to be placed in the receiving cavity;
• a long side of the access opening extends inward to form an elongated protruding rib;
• a positioning column is integrally provided on each of two opposite sides of the two fixed bases;
• the battery box has a straight tubular box body for receiving a battery cell and two bearing bases;
• the two bearing bases are positioned and installed on outer sides of two ends of the straight tubular box body in a lengthwise direction of the straight tubular box body, respectively;
• a first dimple is provided on an outer side of the straight tubular box body in a concave manner and the first dimple extends along the lengthwise direction of the straight tubular box body;
• a second dimple is provided on one side of each of the two bearing bases in the concave manner;
• the two second dimples are connected to two ends of the first dimple in a lengthwise direction of the first dimple through smooth transitions, respectively, to jointly constitute a rotating slot movably matched with the elongated protruding rib;
• the two bearing bases correspondingly match the two fixed bases, respectively;
• an engaging slot is integrally formed on each of the two bearing bases correspondingly, and the engaging slot is configured to be movably matched with the positioning column-;
• when an external force in a positive direction is applied to the battery box, the battery box rotates around the elongated protruding rib as a rotation fulcrum in the positive direction relative to the receiving cavity, and the two engaging slots are correspondingly engaged with the two positioning columns to position the battery box in the receiving cavity;
• and
• when an external force in a reverse direction is applied to the battery box, the battery box rotates around the elongated protruding rib as the rotation fulcrum in the reverse direction relative to the receiving cavity, and the two engaging slots are disengaged from the two positioning columns to separate the battery box from the receiving cavity.