Patent ID: 9669648
Date: 2017-06-06
CPC Classifications: B42B,B42F

Claim:
1. A loose-leaf binder device disposed on a loose-leaf book, the loose-leaf binder device comprising: a back comprising a lower sheet and an upper sheet, wherein two parallel upright baffles are formed between the lower sheet and the upper sheet, so that a space surrounded by the lower sheet, the upper sheet and the two upright baffles is formed with an insert slot, wherein at least one of two ends of the back is formed with an open end portion, a portion of the upper sheet abutting upon an end edge corresponding to the open end portion is formed with a retaining hole communicating with the insert slot, and a track is formed on each of two opposite outer sides of the two upright baffles between the lower sheet and the upper sheet; at least one end plug inserted into the open end portion of the back, wherein the end plug comprises a base cover and a plug body for closing one of the two opposite ends of the back, two sides of the plug body are formed with two side tines which are inserted into the tracks of two sides of the back, respectively, a receiving slot is formed between the two side tines, the plug body is integrally formed with a curve-shaped resilient member in the receiving slot, the resilient member may be inserted into the insert slot of the back, a top surface of the resilient member is formed with one post corresponding to the retaining hole of the back, a free end of the resilient member is formed with an upward compressing edge, and the base cover can correspondingly cover an end portion of the plug body, so that an insert space into which an end portion of the back is inserted is formed between an outer surface of the plug body and an inner surface of the base cover, wherein a middle of an end edge of the base cover is formed with a through hole through which the compressing edge projects; and a loose-leaf coil selectively disposed below the back, wherein the loose-leaf coil is formed with continuous C-shaped portions by bending a wire, and each of two ends of each of the C-shaped portions is formed with a track section to slide in the track of the back.