Patent ID: 8870483
Filing Date: 2014-10-28
Classification: B41J

Abstract:
1. A printing device comprising: a device main body; an opening/closing member comprising an upper frame rotatably connected to the device main body and a cover part disposed above the upper frame and operated integrally with the upper frame as a cap body for opening and closing an opening of the device main body, wherein the cover part comprises a button part, an unlocking mechanism, an arm, a support shaft body, and an elastic member that facilitates opening or closing of the device main body, a first printing head to print first surface sides of a sheet, a first platen, a second printing head to print second surface sides of the sheet and a second platen which are arranged to face each other via a sheet conveying path in the device main body; and first and second spring members which elastically press the first and second printing heads to the first and second platens, wherein the first platen and the second printing head are fixed to the opening/closing member, and the first printing head and the second platen are fixed to the device main body, wherein the first and second printing heads are arranged so that pressing directions of the first and second platens intersect each other; a locking means for locking the opening/closing member when the opening/closing member is closed, the locking means includes the unlocking mechanism disposed in the opening/closing member, and a hook member provided in the device main body engaged with the locking means to be disengaged; a linking member which links the first printing head with the hook member, wherein, when the button part is pressed, the hook member rotates in a direction away from the locking means; wherein, when the button part is pressed and the hook member rotates against a pressure from the elastic member, the locking between the unlocking mechanism and the hook member is released, and the first printing head is retreated from the first platen via the linking member, wherein the button part comprises a lower surface capable of opening such that a concave part is disposed to insert the hook member and a first portion of the surface having a first slope is formed in the concave part to slide with respect to a second portion of the surface having a second slope disposed in a tip of the hook member, wherein the first portion of the surface having the first slope approaches a bottom surface of the device main body as it approaches the support shaft body, and wherein a third portion of the surface having a third slope of a larger inclination angle is formed to be continuous from an upper side of the first portion of the surface having the first slope.