Damping rotating shaft structure
By designing a damping pivot structure, using elastic elements and multiple convex toothed slopes to provide torsional force and damping, the loosening and impact problems of foldable devices are solved, achieving convenient unfolding and hovering effects, and improving the user experience and durability of the devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN JINFENG ELECTRONICS
- Filing Date
- 2025-02-24
- Publication Date
- 2026-07-03
AI Technical Summary
The existing hinge damping structure of foldable electronic devices is prone to loosening, causing the device to close automatically under its own weight. Furthermore, when the folding angle is too large, the impact force is large, causing damage to the device and making it inconvenient to operate.
It adopts a damping hinge structure including a hinge, a torque component and an outer sleeve. Through the design of elastic elements, multiple toothed slopes and damping surfaces, it provides torsional force and damping effect, so that the flip page can be easily unfolded and suspended at a certain angle to prevent excessive folding.
It enables convenient unfolding and hovering of flip pages, avoids equipment damage, reduces the impact force between flip pages, and improves operational convenience and equipment lifespan.
Smart Images
Figure CN224453384U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rotating shaft mechanism technology, and in particular to a damped rotating shaft structure. Background Technology
[0002] In today's rapidly evolving technological world, mobile phones, computers, tablets, and foldable and multi-foldable electronic devices have become an indispensable part of people's daily lives. These devices not only greatly enrich people's entertainment lives but also significantly improve work efficiency. In particular, in recent years, with the continuous growth of users' demand for portability and multifunctionality, foldable electronic devices have quickly become the focus of the market.
[0003] Currently, all existing foldable electronic devices have damping structures on their hinges to ensure that the foldable electronic devices can be folded to any angle. However, the folded electronic devices often require both hands to open, which makes operation inconvenient. Moreover, the damping structure is prone to loosening after long-term friction. When the damping structure is loose, if the folding angle of the electronic device is acute, the device will automatically close due to its own weight. When closing, the impact force between the two pages of the electronic device will be relatively large due to the lack of damping, which may cause damage to the device. Utility Model Content
[0004] The purpose of this application is to overcome the above-mentioned technical problems and provide a damping shaft structure.
[0005] A damping shaft structure, comprising:
[0006] A rotating shaft is fixedly connected to the first flip page. The rotating shaft includes a stop flange, and an elastic element is sleeved on the outer peripheral surface of the rotating shaft.
[0007] A torque assembly, sleeved on the rotating shaft, includes a first wheel sleeve and a second wheel sleeve. The first wheel sleeve abuts against the elastic element and is rotatable around and sliding along the rotating shaft. The second wheel sleeve can only slide along the rotating shaft. The first wheel sleeve has a first concave-convex portion, and the second wheel sleeve has a second concave-convex portion. Both the first and second concave-convex portions are composed of multiple protruding teeth with sloped surfaces.
[0008] An outer sleeve covers the torque component and abuts against the stop flange, with its outer circumferential surface fixed to the second flipping page. The outer sleeve can rotate synchronously with the first wheel sleeve. The outer sleeve has a first damping surface inside, and the second wheel sleeve has a second damping surface that cooperates with the first damping surface at one end away from the second concave-convex part. Damping can be generated between the first damping surface and the second damping surface. When the first flipping page and the second flipping page are in a closed state, the inner protrusion of the first concave-convex part is in contact with the top surface of the inner protrusion of the second concave-convex part, and the elastic element is in a compressed state. When the first flipping page and the second flipping page continue to flip outward to a certain angle, the slope surface of the inner protrusion of the second concave-convex part facing the flipping direction of the first flipping page abuts against the slope surface of the inner protrusion of the first concave-convex part.
[0009] By adopting the above scheme, when the first and second flip pages unfold from the closed state to a certain angle, the protruding teeth inside the first concave-convex part contact the inclined surface of the protruding teeth inside the second concave-convex part. The elastic element unfolds from the compressed state, thereby applying an elastic thrust to the first sleeve. The first sleeve squeezes the second sleeve, so the slope of the protruding teeth inside the first concave-convex part will automatically slide along the slope of the protruding teeth inside the second concave-convex part under the action of the thrust, thereby generating a torsional force along the rotation direction of the first flip page relative to the second flip page, making it easier for the user to unfold the first and second flip pages. Similarly, when the first and second flip pages are closed, the first and second concave-convex parts will provide a force opposite to the closing direction, avoiding excessive force when the first and second flip pages are fastened. Damping can be generated between the first damping surface and the second damping surface, realizing the suspension of the first and second flip pages at a certain angle.
[0010] In one embodiment, the first concave-convex portion includes two first protruding teeth that are centrally symmetrical about the axis of rotation. The first protruding teeth include a first steep slope and a first gentle slope located on both sides of the first protruding teeth. The second concave-convex portion includes a plurality of second protruding teeth that are centrally symmetrical about the axis of rotation. The second protruding teeth include a second steep slope and a second gentle slope. The inclination angle of the first steep slope is greater than that of the first gentle slope. The first gentle slope faces the unfolding direction of the first flip page and the second flip page. The first steep slope can cooperate with the second steep slope, and the first gentle slope can cooperate with the second gentle slope.
[0011] By adopting the above scheme, when the first and second flip pages move in the unfolding direction, the first and second gentle ramps cooperate. Because the inclination angle of the gentle ramps is smaller, and damping is generated between the first and second damping surfaces, the torsional force provided by the gentle ramps can be offset. Therefore, during the relative sliding process of the first and second gentle ramps, they can provide the torsional force in the flipping direction of the flip pages, thereby reducing the force required when the first and second flip pages are flipped open, and can also achieve a hovering effect. When the flipping angle of the first and second flip pages is too large, the first and second steep ramps cooperate to provide the torsional force opposite to the flipping direction. Because the inclination angle of the first and second steep ramps is larger, the torsional force between the first and second steep ramps is greater. The torsional force provided between the first and second steep ramps is greater than the resistance between the damping surfaces, thereby causing the flip pages to automatically rotate in the opposite direction to the folding direction, avoiding excessive flipping angle between the flip pages, which could lead to equipment damage.
[0012] In one embodiment, the first protruding tooth further includes a first top surface located between the first steep slope and the first gentle slope, and the second protruding tooth further includes a second top surface located between the second steep slope and the second gentle slope, wherein the first top surface and the second top surface may be mutually cooperating convex and concave curved surfaces, respectively.
[0013] By adopting the above scheme, when the first flip page and the second flip page are in the closed state, the first top surface and the second top surface cooperate, but relative sliding may occur between the second top surface and the second top surface. By designing the first top surface and the second top surface as convex curved surfaces and concave curved surfaces that can cooperate with each other, displacement between the first top surface and the second top surface is avoided.
[0014] In one embodiment, the inner wall surface of the outer sleeve is provided with a sliding groove, and the outer peripheral surface of the first wheel sleeve is provided with a slider that cooperates with the sliding groove.
[0015] By adopting the above scheme, the outer sleeve can drive the first sleeve to rotate.
[0016] In one embodiment, the outer peripheral surface of the outer sleeve is provided with an assembly groove, and the second flip-page can cooperate with the assembly groove.
[0017] By adopting the above scheme, the assembly slot cooperates with the second flip page, and the assembly slot plays a limiting role, preventing relative rotation between the second flip page and the outer sleeve.
[0018] In one embodiment, the stop flange is provided with a stop notch, and the end of the outer sleeve that abuts against the stop flange is provided with a stop block that can slide along the stop notch.
[0019] By adopting the above scheme, when the flipping angle between the first flipping page and the second flipping page is too large, the sliding notch abuts against the stop block, thereby preventing the outer sleeve from continuing to rotate around the axis. The maximum angle at which the stop block can slide along the stop notch is the maximum angle at which the first flipping page and the second flipping page can flip.
[0020] In one embodiment, the rotating shaft includes a torsion portion and a mounting portion, the torque component is sleeved on the torsion portion, and the mounting portion is located on the side of the stop flange opposite to the torque component and can cooperate with the first flip page.
[0021] By adopting the above scheme, the torsion part is used to support the torsion assembly and the outer sleeve, and the mounting part is used to install the first flip page.
[0022] In one embodiment, the diameter of the mounting portion is larger than the diameter of the torsion portion.
[0023] By adopting the above solution, the diameter of the mounting part is larger than that of the torsion part, and the mounting part can provide a larger lever arm, thereby generating a larger torque with a smaller force. This avoids excessive torsional force between the mounting part and the first flip page, which could cause tearing or deformation at the joint between the first flip page and the mounting part.
[0024] In one embodiment, the outer peripheral surface of the mounting part is provided with a mounting plane, the torsion part is provided with a limiting plane, the first wheel sleeve cooperates with the limiting plane, and the first flipping page cooperates with the mounting plane.
[0025] By adopting the above scheme, the first flip page cooperates with the mounting plane to play a limiting role, preventing relative rotation between the rotating shaft and the first flip page. Through the cooperation between the second cam sleeve and the limiting plane, the first wheel sleeve can only slide along the rotating shaft.
[0026] In summary, this application includes at least one of the following beneficial technical effects:
[0027] 1. When the first and second flip pages are unfolded to a certain angle from their closed state, the protruding teeth inside the first concave-convex part contact the inclined surface of the protruding teeth inside the second concave-convex part. The elastic element relaxes from its compressed state, thereby applying an elastic thrust to the first sleeve. The first sleeve squeezes the second sleeve, so the inclined surface of the protruding teeth inside the first concave-convex part will automatically slide along the inclined surface of the protruding teeth inside the second concave-convex part under the action of the thrust, thereby generating a torsional force along the rotation direction of the first flip page relative to the second flip page, making it easier for the user to unfold the first and second flip pages. Similarly, when the first and second flip pages are closed, the first and second concave-convex parts will provide a force opposite to the closing direction to avoid excessive force when the first and second flip pages are fastened. Damping can be generated between the first damping surface and the second damping surface to achieve the suspension of the first and second flip pages at a certain angle.
[0028] 2. When the first and second flip pages move in the unfolding direction, the first and second gentle ramps work together. Because the inclination angle of the gentle ramps is smaller, and damping is generated between the first and second damping surfaces, the torsional force provided by the gentle ramps can be counteracted. Therefore, during the relative sliding process of the first and second gentle ramps, they can provide the torsional force in the flipping direction of the flip pages, thereby reducing the force required to flip the first and second flip pages open, and also achieve a hovering effect. When the flipping angle of the first and second flip pages is too large, the first and second steep ramps work together to provide the torsional force opposite to the flipping direction. Because the inclination angle of the first and second steep ramps is larger, the torsional force between the first and second steep ramps is greater. The torsional force provided between the first and second steep ramps is greater than the resistance between the damping surfaces, thereby causing the flip pages to automatically rotate in the opposite direction to the folding direction, avoiding excessive flipping angle between the flip pages, which could lead to equipment damage.
[0029] 3. When the first flip page and the second flip page are in the closed state, the first top surface and the second top surface are engaged, but relative sliding may occur between the second top surface and the second top surface. By designing the first top surface and the second top surface as convex and concave curved surfaces that can engage with each other, displacement between the first top surface and the second top surface is avoided. Attached Figure Description
[0030] Figure 1 This is a diagram illustrating the combined state of the first and second flip pages.
[0031] Figure 2 This is a diagram illustrating the combined state of the first and second flip pages.
[0032] Figure 3 This is a schematic diagram of a damping shaft structure provided in this application.
[0033] Figure 4This is a cross-sectional view of a damping shaft structure provided in this application.
[0034] Figure 5 This is an exploded view of a damping shaft structure provided in this application.
[0035] Figure 6 This is a schematic diagram of the torsion assembly structure.
[0036] Figure 7 This is a schematic diagram of the internal structure of the outer sleeve.
[0037] Explanation of reference numerals in the attached drawings: 1. Rotating shaft; 11. Stop flange; 111. Stop notch; 12. Elastic element; 13. Torsion part; 131. Limiting plane; 14. Mounting part; 141. Mounting plane; 2. Torque assembly; 21. First wheel sleeve; 211. Slider; 22. Second wheel sleeve; 221. Second damping surface; 23. First concave-convex part; 231. First tooth; 2311. First steep slope; 2312. First gentle slope; 2313. First top surface; 24. Second concave-convex part; 241. Second tooth; 2411. Second steep slope; 2412. Second gentle slope; 2413. Third top surface; 3. Outer sleeve; 31. First damping surface; 32. Sliding groove; 33. Assembly groove; 34. Stop block; 4. First flip page; 5. Second flip page. Detailed Implementation
[0038] Therefore, it is necessary to provide a damping shaft structure that is easier to deploy.
[0039] Please see Figure 1-3 , Figure 3 This application provides a schematic diagram of a damping hinge structure, which is used for flipping the first flip page 4 and the second flip page 5. Please refer to [link / reference needed]. Figure 1 , Figure 1 The damping shaft structure provided in this application includes a shaft 1, a torque assembly 2, and an outer sleeve 3.
[0040] Please refer to the following: Figure 4-5 , Figure 5This is an exploded view of a damping shaft structure provided in this application. The shaft 1 includes a stop flange 11, a torsion portion 13, and a mounting portion 14. An elastic element 12, which can be a spring, is fitted onto the outer peripheral surface of the shaft 1. A torque assembly 2 is fitted onto the torsion portion 13. The mounting portion 14 is located on the side of the stop flange 11 opposite to the torque assembly 2. The diameter of the mounting portion 14 is larger than the diameter of the torsion portion 13, thereby providing a larger lever arm and enabling a smaller force to generate a larger torque. This prevents excessive torsional force between the mounting portion 14 and the first flip page 4, which could cause tearing or deformation at the mating point between the first flip page 4 and the mounting portion 14. The outer peripheral surface of the mounting portion 14 is provided with a mounting plane 141. The first flip page 4 is fitted onto the mounting portion 14 and can mate with the mounting plane 141. The mounting plane 141 acts as a limit, preventing relative rotation between the first flip portion and the mounting portion 14.
[0041] Please refer to the following: Figure 6 , Figure 6 The diagram shows the structure of the torque assembly 2, which includes a first wheel sleeve 21 and a second wheel sleeve 22. Both the first wheel sleeve 21 and the second wheel sleeve 22 are sleeved on the torsion part 13 of the rotating shaft 1. The torsion part 13 is also provided with a limiting plane 131. The second cam sleeve cooperates with the limiting plane 131. The limiting plane 131 limits the first wheel sleeve 21, preventing it from rotating relative to the rotating shaft 1 and allowing it to slide only along the direction of the rotating shaft 1. The first wheel sleeve 21 abuts against the elastic element 12. A nut is sleeved on the rotating shaft 1, and the nut is provided with an abutting piece that abuts against the end of the elastic element 12 away from the first wheel sleeve 21. The first wheel sleeve 21 can compress the elastic element 12 during the sliding process along the rotating shaft 1.
[0042] The first cam sleeve has a first concave-convex portion 23 at one end away from the elastic element 12. The first concave-convex portion 23 consists of two first protruding teeth 231 that are centrally symmetrically distributed with the axis of the rotating shaft 1 as the center. The first protruding teeth 231 include a first steep slope 2311 and a first gentle slope 2312. The second cam sleeve has a second concave-convex portion 24 at one end facing the first concave-convex portion 23 that cooperates with the first concave-convex portion 23. The second concave-convex portion 24 consists of two second protruding teeth 241 that are aligned with the axis of the rotating shaft 1. The second protruding teeth 241 include a second steep slope 2411 and a second gentle slope 2412. The inclination angle of the first steep slope 2311 is greater than that of the first gentle slope 2312, and the inclination angle of the second steep slope 2411 is greater than that of the second gentle slope 2412. The first steep slope 2311 can cooperate with the second steep slope 2411, and the first gentle slope 2312 can cooperate with the second gentle slope 2412. The top of the first gentle slope 2312 and the first steep slope 2311 is the first top surface 2313, and the top of the second gentle slope 2412 and the second steep slope 2411 is the second top surface. The first top surface 2313 and the second top surface can be convex and concave curved surfaces that cooperate with each other to avoid resistance between the first top surface 2313 and the second top surface and prevent the first top surface 2313 and the second top surface from sliding easily relative to each other. The surfaces of the first top surface 2313 and the second top surface can also be made of damping material to provide damping.
[0043] Please refer to the following: Figure 7 , Figure 7 The diagram shows the internal structure of the outer sleeve. The outer sleeve 3 is covered by the torque assembly 2. The outer circumferential surface of the outer sleeve is provided with a mounting groove 33, which includes multiple mounting grooves 33. The second flip page 5 has a protrusion inside that cooperates with the mounting groove 33. The mounting groove 33 cooperates with the protrusion inside the second flip page 5 to prevent relative rotation between the second flip page 5 and the outer sleeve 3, so that the second flip page 5 can drive the outer sleeve 3 to rotate around the rotating shaft 1. The inner wall surface of the outer sleeve 3 is provided with a sliding groove 32. The outer circumferential surface of the first wheel sleeve 21 is provided with a slider 211 that cooperates with the sliding groove 32. The sliding groove 32 and the slider 211 cooperate to enable the outer sleeve 3 to drive the first wheel sleeve 21 to rotate synchronously. The outer sleeve 3 has a stop block 34 that can slide along the stop notch 111 at one end of the stop protrusion 11. The stop protrusion 11 has a stop notch 111. When the flip angle of the first flip page 4 and the second flip page 5 is too large, the sliding notch abuts against the stop block 34, thereby preventing the outer sleeve 3 from continuing to rotate around the rotating shaft 1. The maximum angle at which the stop block 34 can slide along the stop notch 111 is the maximum angle at which the first flip page 4 and the second flip page 5 can flip.
[0044] The outer sleeve 3 has a first damping surface 31 inside, and the second sleeve 22 has a second damping surface 221 at the end opposite to the second concave-convex portion 24. The surfaces of the first damping surface 31 and the second damping surface 221 can be made of damping material, such as a gasket or powder metallurgy material, to increase the friction between the first damping surface 31 and the second damping surface 221. The structure of the first damping surface 31 and the second damping surface 221 can also be the same as the structure of the first concave-convex portion 23 and the second concave-convex portion 24, respectively.
[0045] The working principle of this application is as follows: when the first flip page 4 and the second flip page 5 are closed, the first top surface 2313 is in contact with the second top surface. At this time, the elastic element 12 is in a compressed state. When the user flips the first flip page 4, the first top surface 2313 and the second top surface slide relative to each other under the action of inertia. When the first top surface 2313 slides past the second top surface, the first gentle slope 2312 comes into contact with the second gentle slope 2412.
[0046] As the user continues to flip the page, a relative displacement occurs between the first gentle ramp 2312 and the second gentle ramp 2412. At this time, the elastic element 12 transmits the elastic force to the first gentle ramp 2312, generating a torsional force perpendicular to the ramp surface between the first gentle ramp 2312 and the second gentle ramp 2412. The direction of the torsional force is the same as the direction of flipping the first flip page 4, so the user can flip the first flip page 4 more easily. Damping is generated between the first damping surface 31 and the second damping surface 221, allowing the first flip page 4 to be freely suspended at a certain angle.
[0047] When the first flip page 4 and the second flip page 5 flip to the end point, the first steep ramp 2311 and the second steep ramp 2411 abut against each other, and the elastic element 12 is in its natural state. When the first flip page 4 flips beyond the end point position, a torsional force opposite to the flipping direction will be generated between the first steep ramp 2311 and the second steep ramp 2411. Under the action of the torsional force, the first flip page 4 will automatically return to the end point position, realizing the end point self-locking function. When the structure of the first damping surface 31 and the second damping surface 221 is the same as the structure of the first concave and convex part 23 and the second concave and convex part 24, respectively, the torsional force can be provided synchronously to further enhance the self-locking and torsional effects.
[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A damped pivot structure for the turning of a first turning leaf (4) and a second turning leaf (5), characterized in that include: A rotating shaft (1) is fixedly connected to the first flip page (4). The rotating shaft (1) includes a stop flange (11), and an elastic element (12) is sleeved on the outer peripheral surface of the rotating shaft (1). A torque assembly (2) is sleeved on the rotating shaft (1). The torque assembly (2) includes a first wheel sleeve (21) and a second wheel sleeve (22). The first wheel sleeve (21) abuts against the elastic element (12). The first wheel sleeve (21) can rotate around the rotating shaft (1) and also slide along the rotating shaft (1). The second wheel sleeve (22) can only slide along the rotating shaft (1). The first wheel sleeve (21) has a first concave-convex portion (23), and the second wheel sleeve (22) has a second concave-convex portion (24). Both the first concave-convex portion (23) and the second concave-convex portion (24) are composed of multiple protruding teeth with slopes. The outer sleeve (3) covers the torque assembly (2) and abuts against the stop flange (11), and its outer circumferential surface is fixed to the second flip-page (5). The outer sleeve (3) can rotate synchronously with the first wheel sleeve (21). The outer sleeve (3) has a first damping surface (31) inside. The second wheel sleeve (22) has a second damping surface (221) that cooperates with the first damping surface (31) at one end away from the second concave-convex part (24). The first damping surface (31) and the second damping surface Damping can be generated between (221). When the first flip page (4) and the second flip page (5) are in a closed state, the inner protrusion of the first concave-convex part (23) is in contact with the top surface of the inner protrusion of the second concave-convex part (24), and the elastic element (12) is in a compressed state. When the first flip page (4) and the second flip page (5) continue to flip outward to a certain angle, the slope of the inner protrusion of the second concave-convex part facing the flipping direction of the first flip page (4) abuts against the slope of the inner protrusion of the first concave-convex part.
2. The damping rotating shaft structure according to claim 1, characterized in that: The first concave-convex portion (23) includes two first protruding teeth (231) that are centrally symmetrical about the axis of the rotating shaft (1). The first protruding teeth (231) include a first steep slope (2311) and a first gentle slope (2312) located on both sides of the first protruding teeth (231). The second concave-convex portion (24) includes a plurality of second protruding teeth (241) that are centrally symmetrical about the axis of the rotating shaft (1). The second protruding teeth (241) include a second steep slope (2411) and a second gentle slope (2412). The inclination angle of the first steep slope (2311) is greater than that of the first gentle slope (2312). The first gentle slope (2312) faces the unfolding direction of the first flip page (4) and the second flip page (5). The first steep slope (2311) can cooperate with the second steep slope (2411), and the first gentle slope (2312) can cooperate with the second gentle slope (2412).
3. The damping shaft structure according to claim 2, characterized in that: The first protruding tooth (231) further includes a first top surface (2313) located between the first steep slope (2311) and the first gentle slope (2312), and the second protruding tooth (241) further includes a second top surface between the second steep slope (2411) and the second gentle slope (2412). The first top surface (2313) and the second top surface can be convex curved surfaces and concave curved surfaces that cooperate with each other, respectively.
4. The damping rotating shaft structure according to claim 2, characterized in that: The inner wall surface of the outer sleeve (3) is provided with a sliding groove (32), and the outer peripheral surface of the first wheel sleeve (21) is provided with a slider (211) that cooperates with the sliding groove (32).
5. A damped rotary union according to claim 4, wherein: The outer sleeve (3) has an assembly groove (33) on its outer circumferential surface, and the second flip page (5) can cooperate with the assembly groove (33).
6. A damped rotating shaft structure according to claim 5, characterized in that: The stop protrusion (11) is provided with a stop notch (111), and the outer sleeve (3) is provided with a stop block (34) that can slide along the stop notch (111) at one end that abuts against the stop protrusion (11).
7. The damping rotating shaft structure according to claim 1, characterized in that: The rotating shaft (1) further includes a torsion part (13) and a mounting part (14). The torque component (2) is sleeved on the torsion part (13). The mounting part (14) is located on the side of the stop flange (11) away from the torque component (2) and can cooperate with the first flip page (4).
8. The damping rotating shaft structure according to claim 7, characterized in that: The diameter of the mounting part (14) is larger than the diameter of the torsion part (13).
9. A damped rotary union according to claim 8, wherein: The mounting part (14) has a mounting plane (141) on its outer peripheral surface, and the torsion part (13) has a limiting plane (131). The first wheel sleeve (21) cooperates with the limiting plane (131), and the first flipping page (4) cooperates with the mounting plane (141).