초록 ▼

A hinge device for a storage containerand includes a housing mounted on any one of the door and a container body, a pair of hinge shafts rotatably fit in respective ends of the housing, each of the pair of hinge shaft including a cam shaft part with a first cam provided on an outer circumferential s

A hinge device for a storage containerand includes a housing mounted on any one of the door and a container body, a pair of hinge shafts rotatably fit in respective ends of the housing, each of the pair of hinge shaft including a cam shaft part with a first cam provided on an outer circumferential surface thereof, and an extension shaft part outwardly extending from the cam shaft part to couple to a remaining one of the door and the container body, a pair of movable members, which are received in respective ends of the housing and fit on the cam shaft parts of the respective hinge shafts, each of the pair of movable members having a second cam to engage with the respective first cam, and a pair of compression springs disposed in ends of the housing to bias the pair of movable members toward the pair of first cams, respectively.

대표청구항 ▼

What is claimed is: 1. A hinge device for a storage container, which enables a door of the container to swingably couple to a container body, the hinge device comprising: a housing mounted on any one of the door and the container body; a pair of hinge shafts rotatably fitting in respective ends of

What is claimed is: 1. A hinge device for a storage container, which enables a door of the container to swingably couple to a container body, the hinge device comprising: a housing mounted on any one of the door and the container body; a pair of hinge shafts rotatably fitting in respective ends of the housing, each of the pair of hinge shafts including a respective one of a pair of cam shaft parts with a respective one of a pair of first cams provided on an outer circumferential surface of the respective one of the pair of cam shaft parts, and a respective one of a pair of extension shaft parts outwardly extending from the respective one of the pair of cam shaft parts to couple to a remaining one of the door and the container body; a pair of movable members, which are received in the respective ends of the housing and fit on the cam shaft parts of respective ones of the pair of hinge shafts so as not to rotate with respect to the housing, each of the pair of movable members having a respective one of a pair of second cams to engage with the respective one of the first pair of first cams; and a pair of compression springs disposed in the respective ends of the housing to bias the pair of movable members toward the pair of first cams, respectively. 2. The hinge device for a storage container as set forth in claim 1, wherein the housing includes a housing body, which is opened at respective ends thereof and receives the pair of movable members and the pair of compression springs in the respective opened ends of the housing body, and a pair of plugs coupled to the respective opened ends of the housing body, each of the pair of plugs having a respective one of a pair of shaft holes, through which an extension shaft part of the respective one of the pair of hinge shaft passes. 3. The hinge device for a storage container as set forth in claim 2, wherein: the housing body comprises a guide rail longitudinally provided on an inner surface of the housing body to assure a stable movement of each of the movable members in the housing body while preventing a rotation of each the movable members, and each of the pair of movable members comprises a guide groove corresponding to the guide rail of the housing body. 4. The hinge device for a storage container as set forth in claim 1, wherein one of the first cams and one of the second cams facing the one first cam of each of the hinge shafts, include tooth-shaped cam surfaces corresponding to each other, each of the cam surfaces having an opening-guide surface inclined with respect to an axis of the respective one of the pair of hinge shafts, so as to cause each of the hinge shafts to rotate in an opening direction of the door when the door is opened, and a closing-guide surface perpendicular to the axis of the respective one of the pair of hinge shafts, so as to allow the respective one of the pair of hinge shafts to rotate in a closing direction of the door by a weight of the door when the door is being closed. 5. The hinge device for a storage container as set forth in claim 2, further comprising: a shock-absorbing unit to increase a resistance to a rotation of each of the hinge shafts when the door is being closed, the shock-absorbing unit including a protrusion provided on an outer surface of each of the hinge shafts and disposed in an inner circumferential surface of each of the plugs, and a shock-absorbing spring attached to the inner circumferential surface of each of the plugs and disposed outside of a respective one of the protrusions, so as to press the respective one of the protrusions when the door is being closed. 6. The hinge device for a storage container as set forth in claim 5, wherein each of the shock-absorbing springs comprises an arch leaf spring. 7. The hinge device for a storage container as set forth in claim 2, further comprising a shock-absorbing unit to increase a resistance to a rotation of each of the hinge shafts when the door is being closed, the shock-absorbing unit including a teeth portion provided on an outer surface of each of the hinge shafts and disposed in an inner circumferential surface of each of the plugs, a gear rotatably held on the inner circumferential surface of each of the plugs, so as to engage with a respective one of the teeth portions when the door rotates to an almost closed position, and a torsion spring disposed on a shaft of each of the gears to provide each of the gears with the resistance to the rotation. 8. The hinge device for a storage container as set forth in claim 1, further comprising a shock-absorbing unit to increase a resistance to a rotation of each of the hinge shafts when the door is being closed. 9. The hinge device for a storage container as set forth in claim 8, wherein the shock-absorbing unit includes a protrusion provided on an outer surface of each of the hinge shafts and disposed in an inner circumferential surface of each of the plugs, and a shock-absorbing spring attached to the inner circumferential surface of each of the plugs and disposed outside of a respective one of the protrusions, so as to press the respective one of protrusions when the door is being closed. 10. The hinge device for a storage container as set forth in claim 8, wherein the shock-absorbing unit includes a teeth portion provided on an outer surface of each of the hinge shafts and disposed in an inner circumferential surface of each of the plugs, a gear rotatably supported on the inner circumferential surface of each of the plugs, so as to engage with a respective one of the teeth portions when the door rotates to be near a completely closed position, and a torsion spring disposed on a shaft of each of the gears to provide each of the gears with a resistance to a rotation. 11. A hinge device for a storage container, which enables a door of the storage container to swingably couple to a container body, the hinge device comprising: a housing mounted on any one of the door and the container body; a hinge shaft rotatably fitting at one end thereof in an end of the housing, and outwardly extending at a remaining end thereof from the housing to couple to a remaining one of the door and the container body; and a shock-absorbing unit provided between an inner surface of the housing and an outer surface of the hinge shaft such that a portion of the shock-absorbing unit is formed on the outer surface of the hinge shaft, so as to increase a resistance to a rotation of the hinge shaft when the door is being closed. 12. The hinge device for a storage container as set forth in claim 11, wherein the shock-absorbing unit includes a protrusion provided on the outer surface of the hinge shaft, and a shock-absorbing spring attached to the inner surface of the housing and disposed outside of the protrusion, so as to press the protrusion when the door is being closed. 13. The hinge device for a storage container as set forth in claim 11, wherein the shock-absorbing unit includes a teeth portion provided on the outer surface of the hinge shaft, a gear rotatably supported on the inner surface of the housing, so as to engage with the teeth portion when the door rotates near a completely closed position, and a torsion spring disposed on a shaft of the gear to provide the gear with the resistance to the rotation. 14. A storage container including a container body having a storage chamber with a top thereof being opened, a door to close the container body, and a hinge device to enable the door to swingably couple to the container body, the hinge device comprising: a housing mounted on any one of the door and the container body; a pair of hinge shafts rotatably fitting in opposite ends of the housing, the pair of hinge shafts including cam shaft parts with first cams provided on outer circumferential surfaces of the cam shaft parts, respectively, and extension shaft parts outwardly extending from the cam shaft parts, respectively, to coupled to a remaining one of the door and the container body; a pair of movable members, which are received in the opposite ends of the housing, and fitting on the cam shaft parts of the hinge shafts, respectively, so as not to rotate with respect to the housing, the pair of movable members having second cams to engage with the first cams, respectively; and a pair of compression springs disposed in the opposite ends of the housing to bias the pair of movable members toward the pair of first cams, respectively. 15. A storage container including a container body having a storage chamber with a top thereof being opened, a door to close the container body, and a hinge device to enable the door to swingably couple to the container body, the hinge device comprising: a housing mounted on any one of the door and the container body; a hinge shaft rotatably fitting at one end thereof in an end of the housing, and outwardly extending at another end thereof from the housing to couple to a remaining one of the door and the container body; and a shock-absorbing unit provided between an inner surface of the housing and an outer surface of the hinge shaft such that a portion of the shock-absorbing unit is formed on the outer surface of the hinge shaft, so as to increase a resistance to a rotation of the hinge shaft when the door is being closed. 16. The storage container as set forth in claim 15, wherein the shock-absorbing unit includes a protrusion provided on the outer surface of the hinge shaft, and a shock-absorbing spring attached to the inner surface of the housing and disposed outside of the protrusion, so as to press the protrusion when the door is being closed. 17. The storage container as set forth in claim 15, wherein the shock-absorbing unit includes a teeth portion provided on the outer surface of the hinge shaft, a gear rotatably supported on the inner surface of the housing, so as to engage with the teeth portion when the door rotates near a completely closed position, and a torsion spring disposed on a shaft of the gear to provide the gear with the resistance to the rotation. 18. A hinge device to rotatably couple a door to a main body, comprising: a housing mounted on any one of the door and the main body; plural hinge shafts rotatably fitting in respective ends of the housing, each of the hinge shafts including a cam shaft part with a first cam provided thereon, and a respective extension shaft part extending from the cam shaft part, to couple to a remaining one of the door and the main body; plural movable members, received in the respective ends of the housing and fitting on the cam shaft parts of respective ones of the hinge shafts so as not to rotate with respect to the housing, each of the movable members having a second cam, to engage with a respective one of the first cams; and plural compression springs disposed in the respective ends of the housing to bias the plural movable members toward the plural first cams, respectively. 19. The hinge device as set forth in claim 18, wherein the first and second cams comprise: cam surfaces, respectively, shaped into a mating sawteeth form, such that the cam surfaces of the first and second cams are engagable with each other. 20. The hinge device as set forth in claim 19, wherein the first and second cams surfaces comprise: inclined opening-guide surfaces, respectively, and are formed over a predetermined section thereof such that when the door is opened by a predetermined angle or more than the predetermined angle, respective ones of the rotatable hinge shafts fitting in the door are forced to rotate in a direction of an opening of the door by elasticity of respective ones of the compression springs. 21. The hinge device as set forth in claim 18, wherein the hinge device is constructed in a single constructional unit. 22. The hinge device as set forth in claim 18, wherein the plural hinge shafts, the plural movable members, and the plural compression springs are symmetrically provided at respective ends of the housing. 23. The hinge device as set forth in claim 18, wherein the housing includes a housing body and comprises: reception spaces formed in the housing body at ends thereof; and plugs filling in openings formed in the housing body, wherein: each of the plugs closes a respective one of the reception spaces, each of the reception spaces receives one of the plural hinge shafts, one of the plural movable members and one of the plural compression springs, each of the plugs is formed with a shaft hole through which one of the hinge shafts passes, and each of the reception spaces has a substantially rectangular section to permit a respective one of the movable members to longitudinally move in the respective one of the reception spaces while preventing a rotation of the respective one of the movable members. 24. The hinge device as set forth in claim 18, wherein each extension shaft part is integrally formed with a respective one of the cam shaft parts, and outwardly extends from the housing by a predetermined distance. 25. The hinge device as set forth in claim 23, wherein the hinge device further comprises: a shock-absorbing unit to enable the door to smoothly close, and comprises: a pair of protrusions formed on an outer surface of each of the plural hinge shafts, and a pair of shock-absorbing members fitting in an inner circumferential surface of each of the plugs, which are provided to increasingly press the pair of protrusions as the door is being closed. 26. A hinge device to rotatably couple a door to a main body, comprising: a housing mounted on any one of the door and the main body; plural hinge shafts rotatably fitting in respective ends of the housing, each of the hinge shafts including a first cam unit thereon with an extension shaft part to couple to a remaining one of the door and the main body; plural movable members, received in the respective ends of the housing and coupling to a cam unit of a respective one of the hinge shafts so as to allow the movable members to longitudinally move while preventing a rotation of the movable members with respect to the housing, each of the movable members having a second cam unit to engage with a respective first cam unit; and plural compression units disposed adjacent to the movable member, to bias the plural movable members toward respective first cams, respectively. 27. A storage container, comprising: a container body having a storage chamber with a top thereof being opened; a door to close the container body; and a hinge device to enable the door to rotatably couple to the container body, wherein the hinge device comprises: a housing mounted on any one of the door and the main body; plural hinge shafts rotatably fitting in respective ends of the housing, each of the hinge shafts including a cam shaft part with a first cam provided thereon, and a respective extension shaft part extending from the cam shaft part to couple to a remaining one of the door and the container body; plural movable members, received in the respective ends of the housing and fitting on the cam shaft parts of respective ones of the hinge shafts so as not to rotate with respect to the housing, each of the movable members having a second cam to engage with a respective one of the first cams; and plural compression springs disposed in the respective ends of the housing to bias the plural movable members toward the plural first cams, respectively. 28. The storage container as set forth in claim 27, wherein the first and second cams comprise: cam surfaces, respectively, shaped into a mating sawteeth form, such that the cam surfaces of the first and second cams are engagable with each other. 29. The storage container as set forth in claim 23, wherein the hinge device further comprises: a shock-absorbing unit to enable the door to smoothly close, and comprises: a pair of protrusions formed on an outer surface of each of the plural hinge shafts, and a pair of shock-absorbing members fitting in an inner circumferential surface of each of the plugs, which are provided to increasingly press the pair of protrusions as the door is being closed. 30. A storage container, comprising: a container body having a storage chamber with a top thereof being opened; a door to close the container body; and a hinge device to enable the door to rotatably couple to the container body, wherein the hinge device comprises: a housing mounted on any one of the door and the main body, plural hinge shafts rotatably fitting in respective ends of the housing, each of the hinge shafts including a first cam unit thereon with an extension shaft part, to couple to a remaining one of the door and the main body, plural movable members, received in the respective ends of the housing and coupling to a cam unit of a respective one of the hinge shafts so as to allow the movable members to longitudinally move while preventing a rotation of the movable members with respect to the housing, each of the movable members having a second cam unit to engage with a respective first cam unit, and plural compression units disposed adjacent to the movable member, to bias the plural movable members toward respective first cams, respectively.