Patent ID: 8590949
Filing Date: 2013-11-26
Classification: E05B,Y10T

Abstract:
1. A cylindrical lock comprising, in combination: an inner chassis including inner and outer ends spaced in a longitudinal direction, with the inner chassis further including a space extending from the inner end of the inner chassis toward but spaced from the outer end of the inner chassis, with a rib formed on an inner periphery of the space, with the inner chassis further including an axial hole extending from the outer end of the inner chassis to the space, with the inner chassis adapted to be mounted in a first mounting hole of a door, with the door having inner and outer sides spaced in the longitudinal direction; an inner locking ring mounted around the inner chassis, with the inner locking ring adapted to abut the inner side of the door; a first push ring pivotably received in the space of the inner chassis and adjacent to the outer end of the inner chassis, with the first push ring including a sleeve portion having first and second ends spaced in the longitudinal direction, with an actuating groove defined in an outer periphery of the sleeve portion of the first push ring, with a first push leg extending from one of the first and second ends of the sleeve portion of the first push ring, with the first push leg spaced from the outer periphery of the sleeve portion of the first push ring in a radial direction perpendicular to the longitudinal direction; a first torsion spring mounted around the sleeve portion of the first push ring, with the first torsion spring including first and second tangs abutting two sides of the first push leg of the first push ring, with the rib of the inner chassis located between the first and second tangs of the first torsion spring, wherein when the first push ring pivots in the circumferential direction, the first push leg pivots the first tang of the first push ring, and the second tang of the first push ring is retained on the rib of the inner chassis; an inner lining mounted in the space of the inner chassis and made of a material having a hardness of HRB80-HRB100, with the inner lining including first and second sides spaced in the longitudinal direction, with a pivot hole defined in the second side of the inner lining and aligned with the axial hole of the inner chassis, with the second side of the inner lining abutting the push ring; an inner spindle pivotably received in the axial hole of the inner chassis, with the inner spindle made of a material having a hardness of HRC35-HRC50, with the inner spindle including an inner end located in the inner chassis and an outer end located outside of the inner chassis, with the inner spindle further including an outer periphery extending between the inner and outer ends of the inner spindle, with a lug formed on the inner end of the inner spindle and protruding radially outward away from the outer periphery of the inner spindle, with an actuating block protruding outward from the outer periphery of the inner spindle and located adjacent to the inner end of the inner spindle, with a portion of the inner spindle adjacent to the inner end being pivotably received in the pivot hole of the inner lining, with the lug located outside of the first side of the inner lining, with the outer end of the inner spindle located outside of the outer end of the inner chassis, with the actuating block of the inner spindle engaged with the actuating groove of the first push ring; an inner handle mounted to the outer end of the inner spindle and located beyond the outer end of the inner chassis, with the inner spindle and the push ring pivoting together with the inner handle in a circumferential direction about the longitudinal direction when the inner handle pivots in the circumferential direction; an outer chassis including inner and outer ends spaced in the longitudinal direction, with the outer chassis further including a space extending from the inner end of the outer chassis toward but spaced from the outer end of the outer chassis, with a rib formed on an inner periphery of the space of the outer chassis, with the outer chassis further including an axial hole extending from the outer end of the outer chassis to the space of the outer chassis, with the outer chassis adapted to be mounted in the first mounting hole of the door, with two engagement arms extending from the inner end of the outer chassis and fixed to the inner chassis, with the inner end of the inner chassis spaced from the inner end of the outer chassis; an outer locking ring mounted around the outer chassis, with the outer locking ring adapted to abut the outer side of the door; a second push ring pivotably received in the space of the outer chassis and adjacent to the outer end of the outer chassis, with the second push ring including a sleeve portion having first and second ends spaced in the longitudinal direction, with an actuating groove defined in an outer periphery of the sleeve portion of the second push ring, with a second push leg extending from one of the first and second ends of the sleeve portion of the second push ring, with the second push leg spaced from the outer periphery of the sleeve portion of the second push ring in a radial direction perpendicular to the longitudinal direction; a second torsion spring mounted around the sleeve portion of the second push ring, with the second torsion spring including first and second tangs abutting two sides of the second push leg, with the rib of the outer chassis located between the first and second tangs of the second torsion spring, wherein when the second push ring pivots in the circumferential direction, the second push leg pivots the first tang of the second push ring, and the second tang of the second push ring is retained on the rib of the outer chassis; an outer lining mounted in the space of the outer chassis, with the outer lining made of a material having a hardness of HRB80-HRB100, with the outer lining including first and second sides spaced in the longitudinal direction, with a pivot hole defined in the second side of the outer lining and aligned with the axial hole of the outer chassis, with the second side of the outer lining abutting one of the first and second ends of the second push ring; an outer spindle pivotably received in the outer chassis, with the outer spindle made of a material having a hardness of HRC35-HRC50, with the outer spindle including an inner end and an outer end, with the outer spindle further including an outer periphery extending between the inner and outer ends of the outer spindle, with an actuating block protruding outward from the outer periphery of the outer spindle, with the outer spindle including a receiving space extending from the inner end of the outer spindle through the outer end of the outer spindle, with the inner end of the outer spindle pivotably received in the pivot hole of the outer lining, with the outer end of the outer spindle located outside of the outer end of the outer chassis, with the actuating block of the outer spindle engaged with the actuating groove of the second push ring; an outer handle mounted to the outer end of the outer spindle and located beyond the outer end of the outer chassis, with the outer spindle and the push ring pivoting together with the outer handle in the circumferential direction when the outer handle pivots in the circumferential direction; an actuating cylinder received in the receiving space of the outer spindle, with the actuating cylinder including a tab, with the actuating cylinder pivoting together with the outer handle when the outer handle pivots in the circumferential direction; and a retractor including two lateral surfaces defining first and second push faces, respectively, with the retractor slideably received between the inner end of the inner chassis and the inner end of the outer chassis, with the lug of the inner spindle abutting the second push face, with the tab of the actuating cylinder abutting the first push face, with the retractor adapted to be connected to a drawing member of a latch device mounted in a second mounting hole of the door in communication with the first mounting hole, with the latch device including a latch movable between a latching position in the door and an unlatching position outside of the door, with the retractor movable between a first position in which the latch is in the latching position and a second position in which the latch is in the unlatching position; wherein when the inner handle pivots in the circumferential direction, the lug of the inner spindle presses against the second push face of the retractor, moving the retractor from the first position to the second position, and wherein when the outer handle pivots in the circumferential direction, the outer spindle and the actuating cylinder pivot in the circumferential direction, and the tab of the actuating cylinder presses against the first push face of the retractor, moving the retractor from the first position to the second position.