A ring mechanism has a housing and rings for holding loose-leaf pages. Pivoting hinge plates are supported in the housing. Each ring includes a pair of ring members, at least one of which is mounted on a hinge plate and movable to open and close the rings. A travel bar carries a plurality of locking elements or wedges. The travel bar is secured to the housing in a manner that limits vertical movement of the travel bar while allowing the travel bar to translate between a locked position in which opening of the rings is blocked and an open position in which the rings are open. The travel bar is biased to remain in the locked position when it is in the locked position. The travel bar is free of forces tending to move the travel bar to the locked position when the travel bar is in the open position.

A single-detent binder for a file folder has a housing, one pair of baseplates, ring shaped components, a control component, a pull rod, rotary locking pieces and an intermediate junction component. The control component, intermediate junction component, pull rod and rotary locking pieces are connected in series. When the control component rotates, the rotary locking pieces are triggered to rotate in the trough of the first baseplate based on the mechanical principle of connecting rod, thus performing the locking/unlocking function. When the binder is closed, the baffle plates on the second baseplate hinder the rotary locking pieces from rotation, thus generating a clamping force. After the baffle plates and rotary locking pieces work jointly to close the binder, the ring shaped components generate a scrambling force, thus enhancing the locking effect and preventing the single-detent binder from opening unexpectedly.

A ring mechanism has an elongate body made of a moldable polymeric material and rings for holding loose-leaf pages. Each ring includes a first ring member and a second ring member. The first ring members are movable relative to the housing and the second ring members between a closed position and an open position. At least one ring member for each ring is a separately formed ring member and comprises a ring portion and an anchor connected to the ring portion. The at least one separately formed ring member is formed separately from the body. The anchor of the separately formed ring member is secured to the body for pivoting movement relative to the body. The anchor can be received in a receptacle in the body adapted to receive the anchor.

A ring mechanism has an elongate body made of a moldable polymeric material and rings for holding loose-leaf pages. Each ring includes a first ring member and a second ring member. The first ring members are movable relative to the housing and the second ring members between a closed position and an open position. At least one ring member for each ring is a separately formed ring member and comprises a ring portion and an anchor connected to the ring portion. The at least one separately formed ring member is formed separately from the body. The anchor of the separately formed ring member is secured to the body for pivoting movement relative to the body. The anchor can be received in a receptacle in the body adapted to receive the anchor.

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 provided in the second through groove (6), and the return spring (8) is connected to the hinged plates (2); and a plurality of ejection strips (9) are provided on the upper end of the push rod (4), through grooves (10) are correspondingly provided on the hinged plates (2) such that the ejection strips (9) penetrate through the through grooves (10), and snap grooves (11) matched with the front end of the ejection strips (9) are also located on the inner surface of the housing (1). The automatic circulation binder has a simple structure, and a circulating process of opening and closing can be completed by means of circular pushing with one hand, and the operation is comfortable, easy, and convenient, the usage costs are reduced, and the market demands are met.