Patent ID: 8602672
Filing Date: 2013-12-10
Classification: B42F

Abstract:
1. A binding device comprising: a plurality of openable-closeable binding rings; a holding member having a length which allows the binding rings to be disposed with a spacing therebetween; an operating member having a surface on which the binding rings are secured with a spacing therebetween, the operating member being secured inside the holding member such that the binding rings are secured to the holding member; and an opening/closing member biasing the binding rings in an opening direction, wherein the operating member comprises a first operating piece and a second operating piece, to one of which one base portion of each of the binding rings is secured and to the other of which the other base portion of each of the binding rings is secured, wherein the holding member includes a bulging portion that extends in the longitudinal direction of a bound object-mounting portion such that engaging portions of the operating pieces oscillate to an inner side of the bound object-mounting portion, wherein when the binding rings open or close, abutting edges of the first and the second operating pieces engage with each other in a state of abutting the first and the second operating pieces, wherein in a direction approaching the inner surface of the bound object-mounting portion of the holding member, the abutting edges of the first and the second operating pieces abut with each other in the longitudinal direction of the first and the second operating pieces to allow the first and the second operation pieces to slide toward the opposite directions thereof, wherein, when the binding rings are closed, at a position away from an inner surface of the holding member, the operating pieces are held in a state in which abutting edges thereof abut against each other, wherein, when the binding rings are opened, the operating pieces are secured to the holding member so as to be held in a manner such as to be directed in a direction approaching the inner surface of the holding member, wherein the opening/closing member is slidably disposed in a holding portion of the holding member such that the first and the second operating pieces move to opposite sides in the longitudinal direction of the operating pieces, wherein the first and the second operating pieces have protruding portions configured to be inserted in a first and a second through hole formed in the holding member, respectively, and are formed with outer edges on the outer side thereof, the outer edges being substantially parallel to the abutting edges, wherein the pair of operating pieces abut with each other, and being substantially linear, wherein the engaging portions, which engage the first and second operating pieces, are provided at the abutting edges where the pair of operating pieces abut so as to protrude from the abutting edges toward the upper sides of the operating pieces, wherein the operating member has an opening/closing member housing portion for housing the opening/closing member, wherein the operating member is recessed at the vicinity of the abutting edge of the operating member toward a protruding direction of a first binding ring of the plurality of binding rings, and is recessed at the vicinity of an abutting edge of another operating member toward the protruding direction of a second binding ring of the plurality of binding rings, forming a first recess in the operating member and a second recess in the other operating member, and the opening/closing member housing portion is formed with the first recess and the second recess, and wherein the opening/closing member is secured to the opening/closing member housing portion of the operating member on the reverse side opposite to the surface on which the binding rings are secured, and when the binding rings are opened, the opening/closing member causes the binding rings to be changed in the opening direction so that the operating pieces are moved in a longitudinal direction of the holding member and are held in the direction approaching the inner surface of the holding member, within the holding member.