# US 12,006,749 B2 · Displaceable rotating shaft structure and foldable device having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,749 B2 - Document ID: US12006749B2 - Status: Granted - Kind: B2 - Application number: 17/973,199 - Filed: 2022-10-25 - Published: 2024-04-25 - Granted: 2024-06-11 - Earliest claimed: 2022-10-25 - Assignees: Fositek Corporation - Applicants: Fositek Corporation - Inventors: Wen-Yen Lin; Wei-Cheng Chien - Web page: https://patentgrep.com/patent/US12006749B2 ## CPC - E05D 3/022: {allowing an additional lateral movement, e.g. for sealing} - G06F 1/1681: {Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683)} - E05D 11/06: Devices for limiting the opening movement of hinges - E05D 11/08: Friction devices between relatively-movable hinge parts (E05D7/086 takes precedence) - E05D 2007/0484: {in a radial direction} - E05Y 2999/00: Subject-matter not otherwise provided for in this subclass - E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A displaceable rotating shaft structure and a foldable device having the rotating shaft structure are disclosed. The displaceable rotating shaft structure comprises a support, a rotating shaft, a connecting rod assembly, a guide assembly, and a torsion assembly. The support has a supporting portion. The connecting rod assembly has a first outer end that is rotatably connected to the linking section of the rotating shaft and a second outer end that is pivotally connected to the supporting portion. The guide assembly has a guide rod. The guide rod is configured to displace relative to the supporting portion. When the rotating shaft is rotated, the rotating shaft drives the connecting rod assembly to adjust the angle and the total length of a joint of connecting rods of the connecting rod assembly, a distance between the rotating shaft and the support is changed through the guide assembly. ## Claims ### Claim 1 A displaceable rotating shaft structure, comprising: a support (1), the support (1) having a supporting portion (11); a rotating shaft (2), one end of the rotating shaft (2) having a linking section (22), the other end of the rotating shaft (2) having a fixed section (23); a connecting rod assembly (3), includes a first connecting rod (31) and a second connecting rod (32) having a first end pivotally connected to the first connecting rod (31), one end of the first connecting rod (31) spaced from the pivotal connection to the second connecting rod (32) is defined as the first outer end (31a) and is connected to the linking section (22) and synchronously rotates therewith, a second end of the second connecting rod (32), spaced from the first connecting rod (31) is defined as the second outer end (32a) is pivotally connected to the supporting portion (11); a guide assembly (4), having a guide rod (41), one end of the guide rod (41) being pivotably connected to the linking section (22) and located between the connecting rod assembly (3) and a torsion assembly (5), the guide rod (41) having at least one guide portion (412), the guide portion (412) being configured to guide the guide rod (41) to slide relative to the supporting portion (11); the torsion assembly (5), coupled to the linking section (22) and located between the guide rod (41) and one end of the linking section (22) away from the fixed section (23), the torsion assembly (5) being configured to provide a pivoting torsion for the rotating shaft (2); wherein when the rotating shaft (2) is rotated relative to the support (1), the rotating shaft (2) drives the connecting rod assembly (3) to change an angle between the first connecting rod (31) and the second connecting rod (32) and a total linear distance between the first outer end (31a) and the second outer end (32a) relative to the rotating shaft (2), a distance between the rotating shaft (2) and the support (1) is changed through the guide assembly (4), the torsion assembly (5) and the connecting rod assembly (3) are spaced by the guide assembly (4) so that the torsion assembly (5) and the connecting rod assembly (3) can be driven under low frictional resistance. ### Claim 2 (depends on 1) The displaceable rotating shaft structure as claimed in claim 1, wherein the supporting portion (11) has at least one guide member (413) and a pivot hole (13); the second outer end (32a) of the connecting rod assembly (3) is pivotally connected to the pivot hole (13) via a pivot member (321); the guide portion (412) is a guide groove for receiving the guide member (413). ### Claim 3 (depends on 2) The displaceable rotating shaft structure as claimed in claim 2, wherein the torsion assembly (5) is composed of an elastic member assembly (50) and at least one friction member (51, 52, 53), the elastic member assembly (50) is configured to generate an elastic force on the at least one friction member (51, 52, 53) along an axial direction of the rotating shaft (2) to increase friction between the at least one friction member (51, 52, 53) and between the friction member (51) the guide assembly (4). ### Claim 4 (depends on 2) A foldable device having the rotating shaft structure as claimed in claim 2, wherein the support (1) is coupled to a preset immovable unit (A) of an electronic device, and the fixed section (23) of the rotating shaft (2) is coupled to a preset movable unit (B) of the electronic device. ### Claim 5 (depends on 1) The displaceable rotating shaft structure as claimed in claim 1, wherein an end of the first connecting rod (31) close to the second connecting rod (32) has a notch (312), a pivot portion (313) is disposed in the notch (312) and pivotally connect to the second connecting rod (32), a stopper (33) is connected to one side of the notch (312), the stopper (33) covers the pivot portion (313), and a depth (C) between a bottom of the notch (312) and the stopper (33) is greater than a thickness (D) of the second end of the second connecting rod (32), so that when the second connecting rod (32) is pivoted, the second connecting rod (32) will not rub against the bottom of the notch (312) and the stopper (33). ### Claim 6 (depends on 5) The displaceable rotating shaft structure as claimed in claim 5, wherein the torsion assembly (5) is composed of an elastic member assembly (50) and at least one friction member (51, 52, 53), the elastic member assembly (50) is configured to generate an elastic force on the at least one friction member (51, 52, 53) along an axial direction of the rotating shaft (2) to increase friction between the at least one friction member (51, 52, 53) and between the friction member (51) the guide assembly (4). ### Claim 7 (depends on 5) The displaceable rotating shaft structure as claimed in claim 5, wherein the guide assembly (4) further includes a linking member (42) pivotally connected to the linking section (22), one side of the linking member (42), facing the guide rod (41), has a protrusion (422), the guide rod (41) has a linking portion (414), the protrusion (422) is engaged in the linking portion (414) so that the linking member (42) is connected to the guide rod (41) to be driven synchronously, and at least one friction member (52) is disposed between the linking member (42) and an elastic member assembly (50). ### Claim 8 (depends on 7) The displaceable rotating shaft structure as claimed in claim 7, wherein at least one first engaging portion (423) is disposed on a surface of the linking member (42), a second engaging portion (522) is disposed on the at least one friction member (52), and the second engaging portion (522) is engaged with the second engaging portion (423). ### Claim 9 (depends on 5) The displaceable rotating shaft structure as claimed in claim 5, wherein the linking section (22) has a non-circular radial cross-section, the first outer end (31a) of the first connecting rod (31) has a linking hole (311) corresponding in shape to the non-circular radial cross-section of the linking section (22), after the linking section (22) is insertedly connected to the linking hole (311), the first connecting rod (31) is pivoted synchronously along with rotation of the rotating shaft (2). ### Claim 10 (depends on 5) A foldable device having the rotating shaft structure as claimed in claim 5, wherein the support (1) is coupled to a preset immovable unit (A) of an electronic device, and the fixed section (23) of the rotating shaft (2) is coupled to a preset movable unit (B) of the electronic device. ### Claim 11 (depends on 1) The displaceable rotating shaft structure as claimed in claim 1, wherein the end of the linking section (22), away from the fixed section (23), is defined as a locking end (24), and a locking member (241) is provided on the locking end (24). ### Claim 12 (depends on 1) The displaceable rotating shaft structure as claimed in claim 1, wherein the torsion assembly (5) is composed of an elastic member assembly (50) and at least one friction member (51, 52, 53), the elastic member assembly (50) is configured to generate an elastic force on the at least one friction member (51, 52, 53) along an axial direction of the rotating shaft (2) to increase friction between the at least one friction member (51, 52, 53) and between the friction member (51) the guide assembly (4). ### Claim 13 (depends on 12) The displaceable rotating shaft structure as claimed in claim 12, wherein the guide assembly (4) further includes a linking member (42) pivotally connected to the linking section (22), one side of the linking member (42), facing the guide rod (41), has a protrusion (422), the guide rod (41) has a linking portion (414), the protrusion (422) is engaged in the linking portion (414) so that the linking member (42) is connected to the guide rod (41) to be driven synchronously, and the at least one friction member (52) is disposed between the linking member (42) and the elastic member assembly (50). ### Claim 14 (depends on 13) The displaceable rotating shaft structure as claimed in claim 13, wherein at least one first engaging portion (423) is disposed on a surface of the linking member (42), a second engaging portion (522) is disposed on the at least one friction member (52), and the second engaging portion (522) is engaged with the second engaging portion (423). ### Claim 15 (depends on 12) The displaceable rotating shaft structure as claimed in claim 12, wherein the linking section (22) has a non-circular radial cross-section, the at least one friction member (51, 52, 53) has a linking hole (511, 521, 531) corresponding in shape to the non-circular radial cross-section of the linking section (22), after the linking section (22) is insertedly connected to the linking hole (511, 521, 531), the friction member (51, 52, 53) is rotated along with the rotating shaft (2). ### Claim 16 (depends on 1) The displaceable rotating shaft structure as claimed in claim 1, wherein the guide assembly (4) further includes a linking member (42) pivotally connected to the linking section (22), one side of the linking member (42), facing the guide rod (41), has a protrusion (422), the guide rod (41) has a linking portion (414), the protrusion (422) is engaged in the linking portion (414) so that the linking member (42) is connected to the guide rod (41) to be driven synchronously, and at least one friction member (52) is disposed between the linking member (42) and an elastic member assembly (50). ### Claim 17 (depends on 16) The displaceable rotating shaft structure as claimed in claim 16, wherein at least one first engaging portion (423) is disposed on a surface of the linking member (42), a second engaging portion (522) is disposed on the at least one friction member (52), and the second engaging portion (522) is engaged with the second engaging portion (423). ### Claim 18 (depends on 17) The displaceable rotating shaft structure as claimed in claim 17, wherein the linking section (22) has a non-circular radial cross-section, the at least one friction member (51, 52, 53) has a linking hole (511, 521, 531) corresponding in shape to the non-circular radial cross-section of the linking section (22), after the linking section (22) is insertedly connected to the linking hole (511, 521, 531), the friction member (51, 52, 53) is rotated along with the rotating shaft (2). ### Claim 19 (depends on 16) The displaceable rotating shaft structure as claimed in claim 16, wherein the linking section (22) has a non-circular radial cross-section, the at least one friction member (51, 52, 53) has a linking hole (511, 521, 531) corresponding in shape to the non-circular radial cross-section of the linking section (22), after the linking section (22) is insertedly connected to the linking hole (511, 521, 531), the friction member (51, 52, 53) is rotated along with the rotating shaft (2). ### Claim 20 (depends on 1) A foldable device having the rotating shaft structure as claimed in claim 1, wherein the support (1) is coupled to a preset immovable unit (A) of an electronic device, and the fixed section (23) of the rotating shaft (2) is coupled to a preset movable unit (B) of the electronic device.