Hinge apparatus having automatic return function
First Claim
1. A hinge apparatus having an automatic return function, the automatic return hinge apparatus comprising:
- an upper body on a circumferential surface of which a first hinge which is fixed to a door is integrally formed and whose upper end portion is blocked by an upper cap on the inner side surface of which a recess is formed;
a lower body on a circumferential surface of which a second hinge which is fixed to a door frame is integrally formed and whose lower end portion is blocked by a lower cap which is connected in a sealing manner;
a shaft whose lower end portion is rotatably installed in the upper portion of the lower body and whose upper end portion is inserted into the recess of the upper cap;
a piston whose outer circumference is slidably installed along the inner circumferential surface of the lower body and which divides the inner portion of the lower body into upper and lower chambers;
a rotational/linear motion converter which converts a rotational motion of the shaft into an axial linear motion of the piston when the rotational force of the door is applied to the shaft according to the rotation of the door;
a damping unit which provides a damping function selectively in the case that the piston descends/ascends according to opening/closing of the door; and
a return unit which provides a restoring force to the rotational/linear motion converter in order to return the door to an initial position at the time when the door is closed.
1 Assignment
0 Petitions
Accused Products
Abstract
A hinge apparatus includes an upper body, a lower body, a shaft whose lower end portion is rotatably installed in the lower body, a piston whose outer circumference is slidably installed along the inner surface of the lower body, a rotational/linear motion converter which converts a rotational motion of the shaft into an axial linear motion of the piston, a damping unit provides a damping function selectively where the piston ascends according to return of the door, a torsion spring rotates the shaft in the door closing direction, and a clutch unit for stopping the elastic force due to reverse twisting of the spring or for restoring the elastic force of the spring.
33 Citations
24 Claims
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1. A hinge apparatus having an automatic return function, the automatic return hinge apparatus comprising:
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an upper body on a circumferential surface of which a first hinge which is fixed to a door is integrally formed and whose upper end portion is blocked by an upper cap on the inner side surface of which a recess is formed; a lower body on a circumferential surface of which a second hinge which is fixed to a door frame is integrally formed and whose lower end portion is blocked by a lower cap which is connected in a sealing manner; a shaft whose lower end portion is rotatably installed in the upper portion of the lower body and whose upper end portion is inserted into the recess of the upper cap; a piston whose outer circumference is slidably installed along the inner circumferential surface of the lower body and which divides the inner portion of the lower body into upper and lower chambers; a rotational/linear motion converter which converts a rotational motion of the shaft into an axial linear motion of the piston when the rotational force of the door is applied to the shaft according to the rotation of the door; a damping unit which provides a damping function selectively in the case that the piston descends/ascends according to opening/closing of the door; and a return unit which provides a restoring force to the rotational/linear motion converter in order to return the door to an initial position at the time when the door is closed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A hinge apparatus having an automatic return function, the automatic return hinge apparatus comprising:
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an upper body on a circumferential surface of which a first hinge which is fixed to a door is integrally formed and whose upper end portion is blocked by an upper cap; a lower body on a circumferential surface of which a second hinge which is fixed to a door frame is integrally formed and whose lower end portion is blocked by a lower cap which is connected in a sealing manner; a shaft whose upper end portion is coupled with the upper cap, and which is extended to the upper end portion of the lower body; a piston whose outer circumference is slidably installed along the inner circumferential surface of the lower body and which divides the inner portion of the lower body into upper and lower chambers; a rotational/linear motion converter which converts a rotational motion of the shaft into an axial linear motion of the piston when the rotational force of the door is applied to the shaft according to opening/closing of the door; a damping unit which is installed in the piston, controls a descending/ascending speed of the piston according to the opening/closing of the door, and provides a damping function selectively in the case that the piston ascends; a torsion spring which is built in the upper body so that one end of the torsion spring is fixed to the upper end portion of the shaft, thereby providing a restoring force rotating the shaft in the direction closing the door; and a clutch unit which is connected with the torsion spring, for stopping an increment of an elastic force of the torsion spring in the case that an opening angle exceeds a predetermined opening angle at the door opening and closing times, and for restoring the elastic force of the torsion spring in the case that the opening angle is within the range of the predetermined opening angle.
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24. A hinge apparatus having an automatic return function, the automatic return hinge apparatus comprising:
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an upper body on a circumferential surface of which a first hinge which is fixed to a door is integrally formed and whose upper end portion is blocked by an upper cap; a lower body on a circumferential surface of which a second hinge which is fixed to a door frame is integrally formed and whose lower end portion is blocked by a lower cap which is connected in a sealing manner; first and second reinforcement plates which are extended perpendicularly with the first and second hinges from the upper and lower bodies so as to be contiguous to the door and the door frame in order to disperse the external forces applied to the first and second hinges, respectively; a shaft whose upper end portion is coupled with the upper cap, and which is extended to the upper end portion of the lower body; a piston whose outer circumference is slidably installed along the inner circumferential surface of the lower body and which divides the inner portion of the lower body into upper and lower chambers; a rotational/linear motion converter which converts a rotational motion of the shaft into an axial linear motion of the piston when the rotational force of the door is applied to the shaft according to opening/closing of the door; a damping unit which is installed in the piston, controls a descending/ascending speed of the piston according to the opening/closing of the door, and provides a damping function selectively in the case that the piston ascends; a torsion spring which is built in the upper body so that one end of the torsion spring is fixed to the upper end portion of the shaft, thereby providing a restoring force rotating the shaft in the direction closing the door; a clutch unit which is connected with the torsion spring, for stopping an increment of an elastic force of the torsion spring in the case that an opening angle exceeds a predetermined opening angle at the door opening and closing times, and for restoring the elastic force of the torsion spring in the case that the opening angle is within the range of the predetermined opening angle; and a clutch stop unit for temporarily stopping the clutch unit.
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Specification