Hinge mechanism and foldable device having same
A foldable device may include a foldable layer and a hinge mechanism. The hinge mechanism may include a plurality of rod assemblies, arranged side by side, each defining an individual pivot axis of the hinge mechanism. The rod assemblies may each include a plurality of segments. One or more of the plurality of segments of one of the plurality of rod assemblies may be coupled to one both of the adjacent rod assemblies, such that the rod assemblies pivot sequentially to guide the folding and the unfolding of the foldable layer of the foldable device.
1. A hinge mechanism, comprising:
a plurality of rod assemblies arranged in a respective plurality of rows extending in parallel, wherein each of the plurality of rod assemblies includes a plurality of segments sequentially arranged in a longitudinal direction of the respective rod assembly, the plurality of rod assemblies define:
a first section of the hinge mechanism that guides a sequential pivoting motion of each of the plurality of rod assemblies;
a second section of the hinge mechanism that couples each of the plurality of rod assemblies to at least one adjacent rod assembly; and
a third section of the hinge mechanism, wherein the third section restricts movement of the plurality of rod assemblies to maintain a position of the hinge mechanism between a minimum bend radius and a maximum bend radius,
wherein the plurality of segments include:
a first segment comprising a first body and a shaft extending outward from an end portion of the first body;
a second segment comprising a second body and a slot formed in and extending through the second body; and
a third segment comprising a third body and a shaft extending outward from an end portion of the third body,
wherein the first section of the hinge mechanism is defined by the first, second and third segments of each of the plurality of rod assemblies,
wherein the shaft of the first segment is received in a first end portion of the slot formed in the second segment, and
the shaft of the third segment is received in a second end portion of the slot formed in the second segment, to couple the first, second and third segments, so as to axially couple the first, second and third segments.
2. The hinge mechanism of claim 1 , wherein:
the first segment further includes:
a guide slot defined in a protrusion formed on a first side portion of the first body; and
a guide recess defined in a second side portion of the first body;
the second segment further includes:
a guide recess defined in a first side portion of the second body; and
a guide pin positioned along a second side portion of the second body; and
the third segment further includes:
a guide slot defined in a protrusion formed on a first side portion of the third body; and
a guide recess defined in a second side portion of the third body.
3. The hinge mechanism of claim 2 , wherein
a first end portion of the guide pin of the second segment of a first rod assembly of the plurality of rod assemblies is received in the guide slot of the first segment of a second rod assembly of the plurality of rod assemblies, and
a second end portion of the guide pin of the second segment of the first rod assembly is received in the guide slot of the third segment of the second rod assembly.
4. The hinge mechanism of claim 3 , wherein the first and second rod assemblies are positioned adjacent to each other in the plurality of rows of rod assemblies, such that the second rod assembly pivots in response to a pivoting movement of the first rod assembly and corresponding movement of the guide pin of the first rod assembly in the guide slot of the first segment of the second rod assembly and the guide slot of the third segment of the second rod assembly.
5. The hinge mechanism of claim 2 , wherein the plurality of segments also includes a fourth segment, including:
a rod having a first end coupled to the third segment; and
at least one linkage mounted on the rod, wherein the at least one linkage couples the respective rod assembly to the rod of an adjacent rod assembly, and
wherein the second section of the hinge mechanism is defined by the fourth segment of each of the plurality of rod assemblies.
6. The hinge mechanism of claim 5 , wherein the at least one linkage includes:
a fourth body;
a first passage formed through the fourth body, wherein the rod extends through the first passage;
a second passage formed through the fourth body; and
a connecting pin positioned in the second passage, wherein the connection pin couples the respective rod assembly to the second passage of the at least one linkage of an adjacent rod assembly.
7. The hinge mechanism of claim 6 , wherein the rod is press fit in the first passage, and the connecting pin is press fit in the second passage.
8. The hinge mechanism of claim 5 , wherein the plurality of segments also includes:
a fifth segment, wherein a second end of the rod is coupled to the fifth segment; and
a sixth segment coupled to the fifth segment,
wherein the third section of the hinge mechanism is defined by the fifth and sixth segments of each of the plurality of rod assemblies.
9. The hinge mechanism of claim 8 , wherein the fifth segment includes:
a fifth body;
a guide recess formed in a first side portion of the fifth body; and
a protrusion formed on a second side portion of the fifth body,
wherein the protrusion is movably received in the guide recess of an adjacent rod assembly, and
wherein rotation of adjacent rod assemblies is restricted in a first direction in response to a positioning of the protrusion of the respective rod assembly against a first end portion of the guide recess in the adjacent rod assembly, and
rotation of adjacent rod assemblies is restricted in a second direction in response to a positioning of the protrusion of the respective rod assembly at a second end portion of the guide recess in the adjacent rod assembly and a positioning of the second side portion of the fifth segment of the respective rod assembly against the first side portion of the fifth segment of the adjacent rod assembly.
10. The hinge mechanism of claim 9 , wherein the sixth segment includes:
a sixth body;
a protrusion formed on a first side portion of the sixth body; and
a guide recess formed on a second side portion of the sixth body,
wherein the protrusion is movably received in the guide recess of an adjacent rod assembly, and
wherein rotation of adjacent rod assemblies is restricted in the first direction in response to a positioning of the protrusion of the respective rod assembly against a first end portion of the guide recess in the adjacent rod assembly, and
rotation of adjacent rod assemblies is restricted in the second direction in response to a positioning of the protrusion of the respective rod assembly at a second end portion of the guide recess in the adjacent rod assembly and a positioning of the second side portion of the sixth segment of the respective rod assembly against the first side portion of the second segment of the adjacent rod assembly.
11. The hinge mechanism of claim 1 , further comprising a bendable sheet coupled to the plurality of rod assemblies and positioned between the hinge mechanism and a foldable display of a computing device.
12. The hinge mechanism of claim 1 , wherein
the plurality of segments of each rod assembly, of the plurality of rod assemblies, are coaxially aligned, and
each rod assembly, of the plurality of rod assemblies, defines a respective pivot axis of the hinge mechanism.
13. A hinge mechanism, comprising:
a plurality of rod assemblies arranged in a respective plurality of rows extending in parallel, wherein each of the plurality of rod assemblies includes a plurality of segments sequentially arranged in a longitudinal direction of the respective rod assembly, the plurality of rod assemblies define:
a first section of the hinge mechanism that guides a sequential pivoting motion of each of the plurality of rod assemblies;
a second section of the hinge mechanism that couples each of the plurality of rod assemblies to at least one adjacent rod assembly; and
a third section of the hinge mechanism that restricts movement of the plurality of rod assemblies to maintain a position of the hinge mechanism between a minimum bend radius and a maximum bend radius, wherein the plurality of segments includes:
a first segment, including:
a first body;
a shaft extending outward from an end portion of the first body;
a guide slot defined in a protrusion formed on a first side portion of the first body; and
a guide recess defined in a second side portion of the first body;
a second segment, including:
a second body;
a slot formed in and extending through the second body;
a guide recess defined in a first side portion of the second body; and
a guide pin positioned along a second side portion of the second body; and
a third segment, including:
a third body;
a shaft extending outward from an end portion of the third body;
a guide slot defined in a protrusion formed on a first side portion of the third body; and
a guide recess defined in a second side portion of the third body,
wherein the first section of the hinge mechanism is defined by the first, second and third segments of each of the plurality of rod assemblies,
wherein the shaft of the first segment is received in a first end portion of the slot formed in the second segment, and
wherein the shaft of the third segment is received in a second end portion of the slot formed in the second segment, to couple the first, second and third segments, so as to axially couple the first, second and third segments.
14. The hinge mechanism of claim 13 , wherein
a first end portion of the guide pin of the second segment of a first rod assembly of the plurality of rod assemblies is received in the guide slot of the first segment of a second rod assembly of the plurality of rod assemblies, and
a second end portion of the guide pin of the second segment of the first rod assembly is received in the guide slot of the third segment of the second rod assembly.
15. A hinge mechanism, comprising:
a plurality of rod assemblies arranged in a respective plurality of rows extending in parallel, wherein each of the plurality of rod assemblies includes a plurality of segments sequentially arranged in a longitudinal direction of the respective rod assembly, the plurality of rod assemblies define:
a first section of the hinge mechanism that guides a sequential pivoting motion of each of the plurality of rod assemblies;
a second section of the hinge mechanism that couples each of the plurality of rod assemblies to at least one adjacent rod assembly; and
a third section of the hinge mechanism that restricts movement of the plurality of rod assemblies to maintain a position of the hinge mechanism between a minimum bend radius and a maximum bend radius, wherein the plurality of segments includes:
a first segment, including:
a first body;
a shaft extending outward from an end portion of the first body;
a guide slot defined in a protrusion formed on a first side portion of the first body; and
a guide recess defined in a second side portion of the first body;
a second segment, including:
a second body;
a slot formed in and extending through the second body;
a guide recess defined in a first side portion of the second body; and
a guide pin positioned along a second side portion of the second body; and
a third segment, including:
a third body;
a shaft extending outward from an end portion of the third body;
a guide slot defined in a protrusion formed on a first side portion of the third body; and
a guide recess defined in a second side portion of the third body,
a fourth segment, including:
a rod having a first end coupled to the third segment; and
at least one linkage mounted on the rod, wherein the at least one linkage couples the respective rod assembly to the rod of an adjacent rod assembly,
wherein the first section of the hinge mechanism is defined by the first, second and third segments of each of the plurality of rod assemblies, and
wherein the second section of the hinge mechanism is defined by the fourth segment of each of the plurality of rod assemblies.
16. The hinge mechanism of claim 15 , wherein the at least one linkage includes:
a fourth body;
a first passage formed through the fourth body, wherein the rod extends through the first passage;
a second passage formed through the fourth body; and
a connecting pin positioned in the second passage, wherein the connection pin couples the respective rod assembly to the second passage of the at least one linkage of an adjacent rod assembly.
17. The hinge mechanism of claim 16 , wherein the rod is press fit in the first passage, and the connecting pin is press fit in the second passage.
18. The hinge mechanism of claim 15 , wherein the plurality of segments also includes:
a fifth segment, wherein a second end of the rod is coupled to the fifth segment; and
a sixth segment coupled to the fifth segment,
wherein the third section of the hinge mechanism is defined by the fifth and sixth segments of each of the plurality of rod assemblies.
19. The hinge mechanism of claim 18 , wherein the fifth segment includes:
a fifth body;
a guide recess formed in a first side portion of the fifth body; and
a protrusion formed on a second side portion of the fifth body,
wherein the protrusion is movably received in the guide recess of an adjacent rod assembly, and
wherein rotation of adjacent rod assemblies is restricted in a first direction in response to a positioning of the protrusion of the respective rod assembly against a first end portion of the guide recess in the adjacent rod assembly, and
rotation of adjacent rod assemblies is restricted in a second direction in response to a positioning of the protrusion of the respective rod assembly at a second end portion of the guide recess in the adjacent rod assembly and a positioning of the second side portion of the fifth segment of the respective rod assembly against the first side portion of the fifth segment of the adjacent rod assembly.