Abstract: Disclosed is an automatic circulation binder, comprising a housing (1), a pair of pivotable hinged plates (2) which are located in the housing (1) and are tightly clamped by the housing (1), and multiple pairs of half ring elements (3) respectively fixed on the pair of hinged plates (2), wherein the half ring element (3) extends out of an upper surface of the housing (1); the automatic circulation binder also comprises a push rod (4) which is located in the housing (1) and capable of moving in an axial direction of the housing, the push rod (4) is located below the hinged plates (2), and a first through groove (5) and a second through groove (6) are successively provided on the push rod (4) from the left to the right in the axial direction of the housing, wherein an automatic rotation push rod locating sleeve (7) is provided in the first through groove (5) and an upper end of the automatic rotation push rod locating sleeve (7) is fixedly connected to an inner surface of the housing (1), a return spring (8) is

Abstract: A ring binder mechanism that includes a housing, first and second hinge boards positioned in the housing that cooperate to define a slot having a closing edge and an opening edge. The hinge boards are pivotable between open and closed positions. A plurality of pairs of semi-rings include first and second ring members mounted on the first and second hinge boards, respectively. A travel bar is positioned below the hinge boards and moveable with respect to the housing and the hinge boards between an open position and a closed position. The travel bar includes at least one top bar extending from a top surface thereof that includes inclined opening and closing surfaces. The top bar extends through the slot in the hinge boards and is biased toward the open position. The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position.

Abstract: Disclosed is an automatic circulation binder, comprising a housing (1), a pair of pivotable hinged plates (2) which are located in the housing (1) and are tightly clamped by the housing (1), and multiple pairs of half ring elements (3) respectively fixed on the pair of hinged plates (2), wherein the half ring element (3) extends out of an upper surface of the housing (1); the automatic circulation binder also comprises a push rod (4) which is located in the housing (1) and capable of moving in an axial direction of the housing, the push rod (4) is located below the hinged plates (2), and a first through groove (5) and a second through groove (6) are successively provided on the push rod (4) from the left to the right in the axial direction of the housing, wherein an automatic rotation push rod locating sleeve (7) is provided in the first through groove (5) and an upper end of the automatic rotation push rod locating sleeve (7) is fixedly connected to an inner surface of the housing (1), a return spring (8) is

Abstract: A ring binder mechanism that includes a housing, first and second hinge boards positioned in the housing that cooperate to define a slot having a closing edge and an opening edge. The hinge boards are pivotable between open and closed positions. A plurality of pairs of semi-rings include first and second ring members mounted on the first and second hinge boards, respectively. A travel bar is positioned below the hinge boards and moveable with respect to the housing and the hinge boards between an open position and a closed position. The travel bar includes at least one top bar extending from a top surface thereof that includes inclined opening and closing surfaces. The top bar extends through the slot in the hinge boards and is biased toward the open position. The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position.

Abstract: A ring binder mechanism that includes a housing, first and second hinge boards positioned in the housing that cooperate to define a slot having a closing edge and an opening edge. The hinge boards are pivotable between open and closed positions. A plurality of pairs of semi-rings include first and second ring members mounted on the first and second hinge boards, respectively. A travel bar is positioned below the hinge boards and moveable with respect to the housing and the hinge boards between an open position and a closed position. The travel bar includes at least one top bar extending from a top surface thereof that includes inclined opening and closing surfaces. The top bar extends through the slot in the hinge boards and is biased toward the open position. The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position.

Abstract: A ring binder mechanism that includes a housing, first and second hinge boards positioned in the housing that cooperate to define a slot having a closing edge and an opening edge. The hinge boards are pivotable between open and closed positions. A plurality of pairs of semi-rings include first and second ring members mounted on the first and second hinge boards, respectively. A travel bar is positioned below the hinge boards and moveable with respect to the housing and the hinge boards between an open position and a closed position. The travel bar includes at least one top bar extending from a top surface thereof that includes inclined opening and closing surfaces. The top bar extends through the slot in the hinge boards and is biased toward the open position. The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position.

Abstract: A ring binder mechanism that includes a housing, first and second hinge boards positioned in the housing that cooperate to define a slot having a closing edge and an opening edge. The hinge boards are pivotable between open and closed positions. A plurality of pairs of semi-rings include first and second ring members mounted on the first and second hinge boards, respectively. A travel bar is positioned below the hinge boards and moveable with respect to the housing and the hinge boards between an open position and a closed position. The travel bar includes at least one top bar extending from a top surface thereof that includes inclined opening and closing surfaces. The top bar extends through the slot in the hinge boards and is biased toward the open position. The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position.

Abstract: A ring binder mechanism that includes a housing, first and second hinge boards positioned in the housing that cooperate to define a slot having a closing edge and an opening edge. The hinge boards are pivotable between open and closed positions. A plurality of pairs of semi-rings include first and second ring members mounted on the first and second hinge boards, respectively. A travel bar is positioned below the hinge boards and moveable with respect to the housing and the hinge boards between an open position and a closed position. The travel bar includes at least one top bar extending from a top surface thereof that includes inclined opening and closing surfaces. The top bar extends through the slot in the hinge boards and is biased toward the open position. The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position.