A hinge device coupling a cover to a container body is minimized so as not to project from the container body to achieve a neat appearance, and is simplified to facilitate efficient production and installation. The hinge device includes a housing having a cavity and attached to one of the cover and
A hinge device coupling a cover to a container body is minimized so as not to project from the container body to achieve a neat appearance, and is simplified to facilitate efficient production and installation. The hinge device includes a housing having a cavity and attached to one of the cover and the container body, a hinge shaft having a cam part rotatably housed in the housing and having a major axis and a minor axis in cross-section, an insert part extended from the cam part to protrude from the housing and connected to the other one of the cover and the container body, and a pair of leaf springs disposed in the housing to press respective outer surfaces of the cam part.
대표청구항▼
1. A hinge device rotatably coupling a cover to a container body in a storage container, comprising:a housing having a cavity and attached to one of the cover and the container body;a hinge shaft having a cam part and an insert part extended from the cam part, the cam part rotatably disposed within
1. A hinge device rotatably coupling a cover to a container body in a storage container, comprising:a housing having a cavity and attached to one of the cover and the container body;a hinge shaft having a cam part and an insert part extended from the cam part, the cam part rotatably disposed within the cavity of the housing, the insert part projected from the housing and connected to the other one of the cover and the container body;a pair of leaf springs disposed in the housing to press respective opposite outer surfaces of the cam part; andan elastic buffer member disposed between the pair of leaf springs to absorb shock generated when the cover is opened or closed. 2. The hinge device of claim 1, wherein the housing comprises support grooves to support each end of the pair of leaf springs to allow the pair of leaf springs to be in contact with the respective opposite outer surfaces of the cam part while being maintained to be parallel to each other. 3. The hinge device of claim 1, wherein the cam part comprises flat surfaces, a pair of rounded corners and a pair of angular corners, the pair of rounded corners are disposed at diagonally opposite corners, the pair of angular corners are disposed at diagonally opposite other corners, and the flat surfaces are provided between an adjacent rounded corner and angular corner. 4. The hinge device of claim 3, wherein a first pair of opposite flat surfaces of the cam part are maintained to be inclined at a predetermined angle with respect to a tangential line of corresponding ones of the leaf springs when the cover is completely opened and a second pair of opposite flat surfaces of the cam part are maintained to be inclined at another predetermined angle with respect to a tangential line of the corresponding ones of the leaf springs when the cover is completely closed such that the hinge shaft is biased to further rotate in one of an opening direction and a closing direction. 5. The hinge device of claim 1, wherein the cam part of the hinge shaft comprises a limit protrusion, and the housing comprises at an inner surface a limit step so that an opening motion of the cover is limited by engagement of the limit protrusion with the limit step when the cover is opened or closed. 6. The hinge device of claim 1, wherein the housing comprises a housing body, a side wall formed at one side of the housing body and having a first hole, an open side formed at another side of the housing body and having an opening, and a housing cover covering the opening of the open side and having a second hole, and the insert part of the hinge shaft passes through the first hole of the side wall while an end of the cam part of the hinge shaft is rotatably inserted into the second hole of the housing cover. 7. The hinge device of claim 1, wherein the cam part comprises at least one groove containing lubricant reducing frictional force between the leaf springs and the cam part. 8. A hinge device in a storage container, comprising:a housing having a housing body, a first side wall formed on one side of the housing body and having a first hole, and a second side wall formed on another side of the housing body opposite to the first side and having a second hole;a hinge shaft disposed in the housing body, having a cam part and an insert part extended from the cam part, the insert part having a first end protruding from the housing through the first hole of the first side wall, the cam part having a second end inserted into the second hole of the second side wall;at least one leaf spring coupled to the housing body, being in contact with an outer surface of the cam part to press the cam part; andat least one buffer member disposed around the cam part to contact the leaf spring to absorb shock generated when the cam part rotates. 9. The hinge device of claim 8, wherein the cam part comprises an angular corner, a small flat surface, a round corner, and a large flat surface, and the outer surface of the cam part conta cting the leaf spring is one of the angular corner, the small flat surface, the round corner, and the large flat surface. 10. The hinge device of claim 9, wherein the leaf spring is in contact with the small flat surface, the angular corner, the large flat surface in order when the hinge shaft rotates in a first direction and in reverse order when the hinge shaft rotates in a second direction opposite to the first direction. 11. The hinge device of claim 9, wherein the buffer member does not contact the leaf spring when the cam part is in contact with the small flat surface. 12. The hinge device of claim 9, wherein the buffer member is in contact with the leaf spring when the cam part is in contact with the large flat surface. 13. The hinge device of claim 9, wherein the buffer member has the same length as the cam part. 14. The hinge device of claim 8, wherein the at least one leaf spring comprises first and second leaf springs coupled to the housing body, and the first and second leaf springs are disposed at opposite first sides of the cam part to contact opposite outer surfaces of the cam part. 15. The hinge device of claim 14, wherein the at least one buffer member comprises first and second buffer members, the first and second buffer members being disposed around opposite second sides of the cam part other than the first sides and between the first and second leaf springs to contact the first and second leaf springs in response to rotation of the cam part. 16. The hinge device of claim 15, wherein the cam part comprises a pair of angular corners, a pair of small flat surfaces, a pair of round corners, and a pair of large flat surfaces, and the opposite outer surfaces of the cam part contacting the leaf spring and the additional leaf spring, respectively, are one pair of the pair of angular corners, the pair of small flat surfaces, the pair of round corners, and the pair of large flat surfaces. 17. The hinge device of claim 16, wherein the large flat surface is wider than the small flat surfaces. 18. The hinge device of claim 16, wherein the large flat surfaces have an angle with respect to corresponding leaf springs when the cam part rotates to cause the small flat surfaces to face the buffer member. 19. The hinge device of claim 16, wherein the small flat surfaces have an angle with respect to corresponding leaf springs when the cam part rotates to cause the large flat surfaces to face the buffer member. 20. The hinge device of claim 16, wherein the rounded corners are disposed at diagonally opposite corners of the cam part, and the angular corners are disposed at diagonally opposite other corners of the cam part. 21. The hinge device of claim 16, wherein each of the small and large flat surfaces is disposed between an adjacent rounded corner and angular corner. 22. The hinge device of claim 16, wherein each of the rounded corners is disposed between an adjacent large flat surface and small flat surface. 23. The hinge device of claim 8, wherein the hinge shaft comprises a flange formed between the cam part and the insert part and a limit protrusion formed on the flange, and the housing body comprises a limit step contacting the limit protrusion to limit rotation of the hinge shaft when the hinge shaft rotates with respect to the housing body to a predetermined position. 24. The hinge device of claim 23, wherein the flange, the cam part, and the insert part are integrated in a monolithic body. 25. The hinge device of claim 8, wherein the cam part comprises a groove containing lubricant, and the grove is formed on the outer surface of the cam part so that the cam part rotates smoothly while contacting the leaf spring. 26. The hinge device of claim 8, wherein the cam part comprises a circular end opposite to the insert part, and the circular end has the same shape as the second hole to be inserted into the second hole while the cam part is rotatably disposed within the housing body. 27. The hinge device of claim 8, wherein the hinge shaft rotates about an axial axis passing through the cam part and the insert part with respect to the housing body. 28. The hinge device of claim 27, wherein the cam part comprises a major axis and a minor axis disposed on a plane perpendicular to the axial axis of the cam part and further comprises a large surface corresponding to the major axis and a small surface corresponding to the minor axis, and the buffer member is not in contact with the leaf spring when the leaf spring contacts the small surface while the buffer member is in contact with the leaf spring when the leaf spring contacts the large surface. 29. The hinge device of claim 8, wherein the housing body comprises a pair of supporting grooves, wherein both ends of the leaf spring are inserted into corresponding supporting grooves while a central portion of the leaf spring contacts the cam part. 30. The hinge device of claim 8, wherein the first through hole has a first round portion and a first flat portion, and the insert part has a second round portion having the same radius of the first round portion and a second flat portion corresponding to the first flat portion of the first through hole. 31. The hinge device of claim 8, wherein the buffer members are made of one of urethane, a rubber material and a sponge.
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이 특허에 인용된 특허 (11)
Carpenter David A. ; Gelfand Mikhail ; Rude Edward T., Friction hinge with detent capability.
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