Patent ID: 9074389
Filing Date: 2015-07-07
Classification: E05B,E05C,E05D,Y10T

Abstract:
1. A lock apparatus for an opening/closing member which is installed in an opening portion in an installation base member so as to be opened and closed, including: a housing which is attached to one of the installation base member and the opening/closing member; a rotor which is attached rotatably to the housing; a rod which is attached to the rotor so as to slide in an interlocked fashion with each other upon rotation of the rotor and so as to be engaged with or disengaged from an engagement portion provided on the other one of the installation base member and the opening/closing member; a bearing portion which is provided on the rotor; a return spring which rotationally biases the rotor directly or via the rod so that the rod is engaged with the engagement portion; and a knob which is attached rotatably to the housing and includes: wherein, with the rod kept engaged with the engagement portion, a rotating center of the knob is positioned closer to the holding portion of the knob than a contact point between the bearing portion and the presser element, wherein an arc-shaped groove is formed in each of the pair of side walls so as to define an arc shape, whereas an arc-shaped projection or plural pin-shaped projections are formed on each of both sides of the housing and inserted into the arc-shaped groove, the arc-shaped projection or plural projections being movable within the corresponding arc-shaped groove along the arc shape, a center of the arc shape functioning as the rotating center of the knob, and wherein the center of the arc shape is provided close to the front surface of the front wall so that at least a part of the front surface of the front wall is encompassed within an imaginary circle drawn by extending the arc shape.