Abstract: A magnetic attraction threshold contains: an accommodation holder, a stopper, and at least one magnetic element. The base includes an open segment, a first groove, and a second groove. The first groove includes a first opening, the second groove includes a second opening, and the first groove and the second groove are symmetrically formed inside the hollow accommodation holder. The stopper includes a stop sheet, a first fixing fence, and a second fixing fence. The first fixing fence and the second fixing fence extend from a bottom of the stop sheet respectively. The stop sheet includes a trench configured to accommodate the at least one magnetic element. The stopper is connected in the accommodation holder. The first fixing fence is movably inserted into the first groove via the first opening, and the second fixing fence is movably inserted into the second groove via the second opening.

Abstract: Disclosed is an automatic released foldable door having a two-way door structure, which foldable door comprises a first closing door device (11) and a second closing door device (13), wherein a first door leaf (2) is connected to one side of the first closing door device (11), the second closing door device has one side connected to the first door leaf (2) and the other side thereof connected to a second door leaf (6), the second door leaf (6) is a door-in-door and a two-way door structure; and the foldable door further comprises a plurality of fixing devices (3, 31, 7) and at least one hinge (4). The foldable door has a relatively small turning radius and can be folded for receiving, and the door-in-door can be rotated in different directions.

Abstract: Disclosed is an automatic released foldable door having a two-way door structure, which foldable door comprises a first closing door device (11) and a second closing door device (13), wherein a first door leaf (2) is connected to one side of the first closing door device (11), the second closing door device has one side connected to the first door leaf (2) and the other side thereof connected to a second door leaf (6), the second door leaf (6) is a door-in-door and a two-way door structure; and the foldable door further comprises a plurality of fixing devices (3, 31, 7) and at least one hinge (4). The foldable door has a relatively small turning radius and can be folded for receiving, and the door-in-door can be rotated in different directions.

Abstract: A double-action door based on two door frames and one door panel of a door-in-door architecture so arranged that the door panel is biasable relative to the inner door frame in a first direction and biasable with the inner door frame relative to the outer door frame in a second direction reversed to the first direction subject to the functioning of a bi-directional door closer.

Abstract: A double-action door based on two door frames and one door panel of a door-in-door architecture so arranged that the door panel is biasable relative to the inner door frame in a first direction and biasable with the inner door frame relative to the outer door frame in a second direction reversed to the first direction subject to the functioning of a bi-directional door closer.

Abstract: A double-action door based on two door frames and one door panel of a door-in-door architecture so arranged that the door panel is biasable relative to the inner door frame in a first direction, and biasable with the inner door frame relative to the outer door frame in a second direction reversed to the first direction.

Abstract: A door including a door frame unit, a door leaf, a door closer system and hinges is provided. A sliding groove is opening formed on a top surface or a bottom surface of the door leaf. The door closer system is assembled to the door leaf and the door beam of the door frame (or embedded in the ground). The door closer has a sliding arm, and the sliding arm has a front end pivoted to the sliding groove of the door leaf, and a rear end connected to the door closer. Through the combination of the door closer with the door frame and the door leaf, the door leaf may rotate outward completely or inward with respect to the door columns. Therefore, the elastic stroke and oil pressure efficacy of the door closer is effectively used, to ensure that the door leaf to return to the close state.