JCIPRNET
Door opening and closing structure
The invention relates to a door opening and closing structure including a door plate, a transverse bar, a zipper and a pulling string. When a tension is applied on the pulling string and the tension is greater than a gravity of the transverse bar and at least a portion of the door plate, and the at least a portion of the door plate is driven by the transverse bar to move along the extension direction to form an opening. When the tension is less than the gravity of the transverse bar and the at least a portion of the door plate, the door plate is driven by the transverse bar to move along the gravity direction to reduce the opening.
APEX BILLION INT'L INV. LTD.
E E E E E E E E E E E E E E
E04H E05F E06B E04H E06B E06B E06B E06B E06B E06B E06B E04H E06B E04H
inventional inventional inventional inventional inventional inventional additional additional inventional inventional additional inventional inventional inventional
Yuan-Chen
Chen