Automatic closing door hinge, automatic closing door mechanism, and hinge of automatic closing door mechanism

An automatic closing door mechanism having a hinge having a pair of wing plates one of which has a cylinder in a circular cylindrical form received therein a piston, the other wing plate fixing an upper portion of an operation rod engaged with the piston, the piston being to be advanced and retracted through the operation rod associatively with a rotation of the other wing plate, the automatic closing door mechanism comprising:

• a female thread formed on the piston;
• a male thread formed on the operation rod, the female and male threads engaging between the piston and the operation rod;
• a sphere arranged in a recess formed in an outer surface of the piston;
• a recess groove formed lengthwise in the cylinder, the sphere rolling along the recess groove, to allow the piston to slide within the cylinder;
• and
• a compression coiled spring arranged within the cylinder and to be compressed by an operation of the piston during door opening, the other wing plate being rotated in a direction toward door closing associatively with a return movement of the piston due to a restoration force of the compression coiled spring;
• whereby impact upon door closing is to be damped by an action of air cushioning within the cylinder due to a return movement of the piston.

An automatic closing door mechanism having a damping function having a hinge comprising:

• a pair of wing plates;
• a piston arranged within a cylinder provided in one of the wing plates;
• an operation rod fixed at a substantially upper portion by the other wing plate, a substantially lower portion of the operation rod being arranged within the cylinder;
• a cam groove having a slant region formed in an outer periphery of the substantially lower portion of the operation rod;
• and
• a sphere arranged for rolling in a predetermined position of the piston and protruding in an inner periphery;
• whereby the piston advances and retracts correspondingly to a movement of the sphere relative to the slant region of the cam groove, impact being to be damped by an action of air cushioning within the cylinder due to a return movement of the piston during door closing.

A hinge for use in an automatic closing door mechanism having a damping function, the hinge comprising:

• a pair of wing plates;
• a piston arranged within a cylinder provided in one of the wing plates;
• an operation rod fixed at a substantially upper portion thereof by the other wing plate, a substantially lower portion of the operation rod being arranged within the cylinder;
• a cam groove having a slant region formed in an outer periphery of the substantially lower portion of the operation rod;
• a sphere arranged for rolling in a predetermined position of the piston and protruding in an inner periphery;
• whereby the piston advances and retracts correspondingly to a movement of the sphere relative to the slant region of the cam groove, impact being to be damped by an action of air cushioning within the cylinder due to a return movement of the piston during door closing.

A hinge for use in an automatic closing door mechanism having a damping function due to air cushioning action, the hinge comprising:

• a pair of wing plates;
• a piston arranged within a cylinder provided in one of the wing plates;
• an operation rod fixed at a substantially upper portion by the other wing plate, the piston being engaged directly or indirectly with a substantially lower portion of the operation rod, the piston being to be advanced and retracted through the operation rod associatively with a rotation of the other wing plate;
• and
• a sphere arranged for rolling in a predetermined position of the piston and protruding in an outer periphery;
• whereby the piston slides within the cylinder by rolling the sphere along a recess groove formed lengthwise in the cylinder.

A hinge for in an automatic closing door mechanism having a damping function due to air cushioning action, the hinge comprising:

• a pair of wing plates;
• a piston arranged within a cylinder provided in one of the wing plates;
• an operation rod fixed at a substantially upper portion by the other wing plate, the piston being engaged directly or indirectly with a substantially lower portion of the operation rod, rotation of the other wing plate and advancement and retraction of the piston being associated through the operation rod;
• and
• wherein the cylinder has a cross sectional form, having at least one protrusions protruding from a circle.

A movement transfer mechanism comprising:

• a rod;
• a cam groove having a slant region and formed in an outer periphery of the rod;
• a sphere arranged for rolling in a predetermined position of a cylindrical part and protruding in an inner periphery, the rod being inserted in the cylindrical part to thereby engaging between the sphere and the cam groove;
• wherein, by a movement of the sphere relative to the slant region of the cam groove, a rotation of the rod about an axis is converted into an advancement and retraction of the cylindrical part in an axial direction of rod thereby transferring a motion, or an advancement and retraction of the cylindrical part in an axial direction of rod is converted into a rotation about an axis of the rod thereby transferring a motion.

An automatic closing door mechanism comprising

• a first hinge structured with:
• a pair of wing plates;
• a cylindrical member arranged within a cylinder provided in one of the wing plates;
• an operation rod fixed at a substantially upper portion by the other wing plate, the cylindrical member being engaged directly or indirectly with a substantially lower portion of the operation rod, a rotation of the other wing plate and an ascend and descend of the cylindrical member being associated through the operation rod;
• a spring arranged within the cylinder and to be compressed by an ascend of the cylindrical member during door opening, the other wing plate being to be rotated in a direction toward door closing associatively with a descend of the cylindrical member due to a restoration force of the spring;
• and
• an engaging part provided inward of the cylindrical member and beneath the operation rod, the engaging part being to be directly or indirectly engaged with the cylindrical member, the cylindrical member when ascended to a predetermined height being released from the engagement of the engaging part and stopped ascending, the cylindrical member positioned in a predetermined height being engaged by the engaging part whereby the cylindrical member begins descending due to a restoration force of the spring;
• and
• a second hinge structured with:
• a pair of wing plates;
• a cylinder provided on one of the wing plates;
• a piston arranged within the cylinder;
• and
• an operation rod fixed at a substantially upper portion by the other wing plate, the piston being directly or indirectly engaged with a substantially lower portion of the operation rod;
• whereby a rotation of the other wing plate and an ascend and descend of the piston is associated through the operation rod, impact being to be damped during door closing by an action of air cushioning due to a descend of the piston.

A hinge of an automatic closing door mechanism comprising:

• a pair of wing plates;
• a cylinder provided in one of the wing plates;
• a piston arranged within the cylinder;
• an operation rod fixed at a substantially upper portion by the other wing plate, the piston being directly or indirectly engaged with a substantially lower portion of the operation rod, a rotation of the other wing plate and an ascend and descend of the piston being associated through the operation rod, impact being to be damped during door closing by an action of air cushioning due to a descend of the piston;
• and
• a flow-out suppressing member provided outward of a narrowest portion of a flow-out passage of the cylinder.