A spring, damping assembly and electronic device

Abstract

The application provides a spring, damping assembly and electronic equipment, the electronic equipment can include handheld device, vehicle-mounted device, wearable device, terminal device or any one connected to wireless modem, cellular phone, smart phone, personal digital assistant, computer, tablet computer, portable computer and the like, the cross section of the spring wire in the embodiment of the application is rectangular, under the same space condition, the rectangular cross section spiral spring has greater rigidity, absorbs more energy, improves the damping force generated by the damping assembly, which is beneficial to improve the hand feeling of the user when folding or unfolding the electronic equipment; under the condition of meeting the same damping force, the rectangular cross section spiral spring occupies smaller space, which is beneficial to the arrangement of other parts of the electronic equipment.

Description

[0001] This application claims a divisional application of Chinese patent application No. 202480002183.2, entitled "A Spring, Damping Assembly and Electronic Device", filed with the China National Intellectual Property Administration on April 12, 2024, and entered the national phase on October 15, 2024.

[0002] This application claims priority to Chinese Patent Application No. 202322453384.X, filed on September 8, 2023, entitled "A Spring, Damping Assembly and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of electronic product technology, and more particularly to a spring, damping assembly, and electronic device. Background Technology

[0004] Currently, electronic devices such as laptops and foldable phones consist of a first main body, a hinge mechanism, and a second main body. The first and second main bodies are folded and unfolded relative to each other via the hinge mechanism. Please refer to... Figures 1 to 3 The electronic device shown is understood. Figures 1 to 3 The diagrams show the electronic device in a flattened state, an unfolded state, and a folded state.

[0005] The rotating shaft mechanism is usually equipped with a damping component. The damping component can improve the rotation feel of the rotating shaft mechanism and can also suspend the first and second bodies to a predetermined unfolding position. Currently, the damping component is usually a convex-concave mating mechanism, with a cylindrical spring providing the axial force of the convex-concave mating mechanism. The cross-section of the spring wire of the cylindrical spring is circular.

[0006] How to minimize the size of damping components while ensuring the normal functioning of electronic devices is a technical issue that those skilled in the art have always been concerned about. Summary of the Invention

[0007] This application provides a spring with high stiffness and small footprint, as well as a damping assembly and electronic device including the spring.

[0008] In one aspect, embodiments of this application provide a spring, including a spring wire. The spring wire is spirally wound N times to form a columnar structure, where N is an integer greater than or equal to 4, such as N equal to 4, 5, 6, 7, 8, or an integer greater than 8. The cross-section of the spring wire is rectangular, and the rectangle includes an adjacent first side and a second side. The length of the first side ranges from 0.3 mm to 0.55 mm, and the length of the second side also ranges from 0.3 mm to 0.55 mm. Ideally, the first side and the second side of the rectangle are perpendicular. However, due to limitations such as processing technology, the first side and the second side can be approximately perpendicular, allowing for a certain deviation, as long as it does not affect the overall effect.

[0009] Compared to a circular spring wire, a rectangular cross-section helical spring has greater stiffness and absorbs more energy under the same spatial conditions, increasing the damping force generated by the damping component and improving the user's feel when folding or unfolding electronic devices. Under the same damping force, a rectangular cross-section helical spring occupies less space, which is beneficial for the arrangement of other components of electronic devices.

[0010] In one example, the length of the first side is greater than the length of the second side. The first side extends axially along the columnar structure, and its length ranges from 0.45 mm to 0.55 mm. The length of the second side ranges from 0.3 mm to 0.35 mm. Within these ranges, the circumferential space occupied by the spring wire is relatively small, which can meet the usage requirements of most electronic devices.

[0011] In one example, the first and second sides are connected by an arc with a radius greater than or equal to 0.15 mm. After machining the arc, the length of the first side is greater than or equal to 0.36 mm. In this embodiment, the rectangular cross-section corners are rounded, where stress is lower, which is beneficial for improving the spring's performance and service life.

[0012] In one example, the inner ring of the columnar structure is cylindrical, with a diameter ranging from 0.88 mm to 0.95 mm. The cylindrical shape of the inner ring of this columnar structure results in a small spring volume and high performance, which can meet the small-volume design requirements of electronic devices.

[0013] In one example, the outer ring of the columnar structure is cylindrical, with a diameter ranging from 1.65 mm to 1.72 mm. Springs within this size range are small in volume, offer high performance, and meet the compact design requirements of electronic devices.

[0014] In one example, under uncompressed conditions, the axial length of the columnar structure ranges from 7.6 mm to 7.8 mm. Springs within this length range can generally meet the damping force requirements of most electronic devices and occupy relatively little space.

[0015] In one example, the effective number of coils in the columnar structure ranges from 6 to 8, and the total number of coils in the columnar structure ranges from 8 to 10. This range of spring coils satisfies the damping performance requirements while occupying less space, which is beneficial for the overall structural layout of electronic devices.

[0016] In one example, the spring's intercept ranges from 0.7 mm to 0.9 mm, a spring intercept that balances usability requirements with minimal space requirements.

[0017] In one example, the columnar structure includes a first spring coil and a second spring coil located at both ends. The relatively distant end faces of the first and second spring coils are planes, perpendicular to the axial direction of the columnar structure. In this example, the two end faces of the columnar structure are planes, which helps to increase the contact area between the spring and the components on both sides, improve the reliability of force transmission, and enhance the stability of the system.

[0018] In one example, the minimum thickness of the first and second spring coils is greater than or equal to 0.4 times the axial length of the rectangular cross-section. This improves the stability of the system formed by the springs.

[0019] In one example, the angle of the circumference occupied by the plane is greater than 180 degrees. This maximizes the contact area between the spring and its contacting components, thereby improving the stability of the system containing the spring.

[0020] Secondly, this application also provides a damping component, including a bracket, a shaft, a slider, and a spring of any one of the above. The spring is nested in the shaft, and the slider slides along the shaft. Under the action of the spring, the concave and convex mating surfaces of the bracket and the slider abut against each other.

[0021] In one example, the support includes a first support and a second support, and the shaft includes a first shaft and a second shaft. The first support and the second support have relatively close first ends. The first end of the first support is rotatably connected to the first shaft, and the first end of the second support is rotatably connected to the second shaft. The slider is slidably connected to both the first shaft and the second shaft, and the slider has a concave-convex fit with both the first support and the second support. In this embodiment, the slider slides along the first shaft and the second shaft, which is simple in structure. The first support and the second support are also respectively connected to the first shaft and the second shaft, which is compact in arrangement.

[0022] In one example, the ends of the first and second brackets that are relatively far apart are designated as the second ends. These second ends are used for sliding connections with corresponding side panels of the electronic device. Driven by the side panels, the first and second brackets can rotate relative to their respective axes, resulting in a high degree of synchronization between the brackets and the door panels.

[0023] In one example, both the first and second supports have a first sleeve and a second sleeve, which are arranged axially spaced apart. The slider includes a first slider and a second slider, both of which are slidably sleeved on the first and second shafts. A spring is sleeved on both the first and second shafts, and the spring is press-fitted between the first and second sliders. The first slider has a concave-convex fit with the first sleeve of the first support and the first sleeve of the second support, and the second slider has a concave-convex fit with the second sleeve of the first support and the second sleeve of the second support. In this example, sliders are provided on both sides of the spring, as well as cam portions that convex-convexly fit with the sliders, improving the damping force. Furthermore, the damping assembly has a compact structure and occupies little space.

[0024] In one example, the first and second supports are also provided with arc-shaped concave surfaces on opposite sides to avoid the springs and sliders on the corresponding sides.

[0025] Thirdly, embodiments of this application also provide an electronic device, including any of the springs described above, or any of the damping components described above.

[0026] In one example, the electronic device includes a first body, a second body, and a pivot mechanism, under the action of the pivot mechanism, the first body and the second body can be folded and unfolded relative to each other, and the pivot mechanism includes at least one damping component.

[0027] In one example, the electronic device is a foldable screen phone, with the first main body and the second main body being the two mid-frames of the foldable screen phone, respectively.

[0028] Alternatively, the electronic device may be a laptop computer, with the first main body and the second main body being the display side and keyboard side of the laptop computer, respectively.

[0029] The damping component and electronic device provided in this application embodiment include the above-mentioned spring, so the damping component and electronic device also have the above-mentioned technical effects of the spring. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of an electronic device in an unfolded state according to an embodiment of this application;

[0031] Figure 2 For when Figure 1 A schematic diagram of the electronic device in its unfolded state in the middle.

[0032] Figure 3 For when Figure 1 A schematic diagram of the electronic device in a folded state;

[0033] Figure 4 for Figure 1 The diagram shows the structure of the rotating shaft mechanism in the electronic device shown.

[0034] Figure 5 for Figure 4 A schematic diagram of the damping component in the rotating shaft mechanism shown;

[0035] Figure 6 for Figure 4 An exploded view of the damping component shown.

[0036] Figure 7 for Figure 6 A schematic diagram of the spring in the damping assembly shown.

[0037] Figure 8 for Figure 7 The front view of the spring shown;

[0038] Figure 9 for Figure 8 The spring shown is shown in section AA.

[0039] Figure 10 for Figure 7 A schematic diagram of the cross-section of the spring wire;

[0040] Figure 11 This is a schematic diagram of the cross-section of the spring wire in another embodiment of this application;

[0041] Figure 12 for Figure 9 Enlarged view of a portion of area A1 in the middle;

[0042] Figure 13 for Figure 8 View from direction B in the middle.

[0043] in, Figures 1 to 13 middle:

[0044] 110 First main body; 120 Second main body; 200 Display screen; 300 Rotating shaft mechanism; 310 Base; 320 First swing arm; 320 Second swing arm; 340 First door panel; 350 Second door panel; 360 Synchronization assembly; 370 Damping assembly;

[0045] 1. Spring; 10. Spring wire; 11. Effective spring coil; 12. First spring wire coil; 13. Second spring wire coil; 121. Plane; 1211. First boundary line; 1212. Second boundary line;

[0046] 2. Support; 21. First support; 21a. Inner hole; 22. Second support; 201. First sleeve; 202. Second sleeve; 203. Protruding post; 204. Arc-shaped concave surface;

[0047] 3-axis body; 31 First axis body; 32 Second axis body; 301 Slot;

[0048] 4 sliders; 41 first slider; 42 second slider; 401 concave-convex surface; 4a through hole

[0049] 5 snap rings Specific Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of the embodiments of this application, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and specific examples.

[0051] This application provides a spring with high stiffness and small space occupation. This spring can be applied to electronic devices, and of course, it can also be applied to sliding doors, accessory hinges, etc. The electronic device can be a mobile terminal such as a mobile phone, wearable device, in-vehicle device, augmented reality (AR) / virtual reality (VR) device, laptop computer, ultra-mobile personal computer (UMPC), netbook, personal digital assistant (PDA), etc., or it can be a professional shooting device such as a digital camera, SLR camera / mirrorless camera, action camera, gimbal camera, drone, etc. This application does not limit the specific type of electronic device. For ease of understanding, the following uses a foldable screen mobile phone as an example to continue introducing the technical solution and technical effects.

[0052] Please see again Figure 1 , Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0053] The electronic device in this embodiment includes a first body 110, a second body 120, a display screen 200, and a hinge mechanism 300. The first body 110 and the second body 120 are located on both sides of the hinge mechanism 300. Under the action of the hinge mechanism 300, the first body 110 and the second body 120 can be folded and unfolded relative to each other, thereby realizing the folding and unfolding of the electronic device. Figures 1 to 3 The diagrams show the electronic device in a flattened state, an unfolded state, and a folded state. Figure 1 Taking a foldable screen phone as an example, the first body 110 and the second body 120 are the two mid-frames of the foldable screen phone, respectively. When the electronic device is a laptop, the first body 110 can be the display side of the laptop, and the second body 120 can be the keyboard side of the laptop.

[0054] In this embodiment, the display screen 200 includes a display module and a transparent cover. The display module can display images and videos, and can employ technologies such as liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light-emitting diode (AMOLED), flexible light-emitting diode (FLED), quantum dot light-emitting diode (QLED), and electrophoretic (E-Ink). Currently, most foldable electronic devices use OLED displays. The transparent cover covers the outside of the display module, protecting it. The transparent cover can be glass, or other transparent materials that provide protection, such as transparent polyimide. The display screen 200 can also have touch functionality, meaning it can be a touchscreen.

[0055] Driven by the first main body 110 and the second main body 120, the display screen 200 can be folded and unfolded relative to each other.

[0056] Please refer to Figure 4 In this embodiment, the pivot mechanism 300 includes a base 310, a first door panel 340, a second door panel 350, a first swing arm 320, and a second swing arm 330. The base 310 is located between the first door panel 340 and the second door panel 350. The first swing arm 320 and the second swing arm 330 are symmetrically rotatably connected to both sides of the base 310. The first swing arm 320 is connected between the first door panel 340 and the base 310, and is also rotatably connected to the first door panel 340, so that the first door panel 340 can rotate around the base 310 via the first swing arm 320. The second swing arm 330 is connected between the second door panel 350 and the base 310, and is also rotatably connected to the second door panel 350, so that the second door panel 350 can rotate around the base 310 via the second swing arm 330. The rotation of the swing arm and the door panel, and the swing arm and the base 310 can be achieved by using arc-shaped grooves and arc-shaped blocks, or by other means.

[0057] The first door panel 340 and the second door panel 350 can have the same structure, or they can have different structures. Similarly, the first swing arm 320 and the second swing arm 330 can have the same structure, or they can have different structures.

[0058] In this embodiment of the application, the first door panel 340 and the second door panel 350 are respectively fixedly connected to the first body 110 and the second body 120, or the first door panel 340 and the second door panel 350 can be part of the first body 110 and the second body 120.

[0059] The rotating shaft mechanism 300 also includes a synchronization component 360 and a damping component 370. The synchronization component 360 is used to achieve synchronous rotation of the first door panel 340 and the second door panel 350. The synchronization component 360 can be a gear mechanism or a helical mechanism. Figure 4 The diagram shows that the synchronization component 360 is in the form of a gear mechanism. The number and position of the synchronization components 360 can be reasonably selected based on the specific structure of the rotating shaft mechanism 300. Figure 4 The example shown is an example of setting up two sets of synchronization components 360.

[0060] In this embodiment, the damping component 370 is used to generate damping force for the rotation of the first door panel 340 and the second door panel 350. Please refer to... Figure 5 and Figure 6 The damping assembly 370 includes a first shaft 31, a second shaft 32, two springs 1, a first slider 41, a second slider 42, a first bracket 21, and a second bracket 22. The first shaft 31 and the second shaft 32 are arranged parallel to the axial direction of the rotating shaft mechanism 300, and both are mounted on the base 310. Specifically, the two ends of the first shaft 31 and the second shaft 32 can be connected to the mounting holes of the base 310. Each of the first slider 41 and the second slider 42 simultaneously passes through the first shaft 31 and the second shaft 32, that is, each of the first slider 41 and the second slider 42 has two through holes 4a, which are respectively sleeved on the first shaft 31 and the second shaft 32. Each of the first slider 41 and the second slider 42 is supported on the first shaft 31 and the second shaft 32, and can slide relative to the two shafts axially. Springs 1 are sleeved on both the first shaft 31 and the second shaft 32, and the two springs 1 are pressed between the first slider 41 and the second slider 42. The relatively distant end faces of the first slider 41 and the second slider 42 each have two concave and convex surfaces 401.

[0061] The relatively close ends of the first support 21 and the second support 22 are defined as the first ends. The first end of the first support 21 is rotatably connected to the first shaft 31, and the first end of the second support 22 is rotatably connected to the second shaft 32. Specifically, both the first support 21 and the second support 22 have two sleeves spaced apart along the axial direction. The two sleeves of the first support 21 are coaxial with the first shaft 31, and the first shaft 31 passes through the inner holes 21a of the two sleeves of the first support 21. The two sleeves of the second support 22 are coaxial with the second shaft 32, and the second shaft 32 passes through the inner holes 21a of the two sleeves of the second support 22. For ease of description, in this embodiment, the two sleeves spaced apart along the axial direction are defined as the first sleeve 201 and the second sleeve 202, respectively. The first slider 41 is located on one side of the two first sleeves 201, and the second slider 42 is located on one side of the two second sleeves 202. Under the action of the restoring force of the spring 1, the two concave and convex surfaces 401 of the first slider 41 abut against the two first sleeves 201, and the two concave and convex surfaces 401 of the second slider 42 abut against the two second sleeves 202.

[0062] The first slider 41 and the second slider 42 can have the same structure, and the first bracket 21 and the second bracket 22 can also have the same structure.

[0063] The axial positioning of the first shaft 31 and the second shaft 32 relative to the first bracket 21 and the second bracket 22 can be achieved by means of retaining rings 5 ​​and retaining grooves 301. For example, retaining grooves 301 are provided at both ends of the first shaft 31 and the second shaft 32, and retaining rings 5 ​​are installed inside the retaining grooves 301. The retaining rings 5 ​​at both ends restrict the first bracket 21 and the second bracket 22 from moving axially relative to each shaft 31.

[0064] As described above, the damping assembly 370 includes a bracket 2, a shaft 3, a slider 4, and a spring 1. The bracket and slider are in a concave-convex fit, and under the restoring force of the spring 1, the concave-convex fit surfaces of the bracket 2 and slider 4 abut against each other. The form of the bracket 2 is not limited to the structure of the first bracket 21 and the second bracket 22 described in the embodiments of this application. The number of brackets 2 can also be one, and the number of sliders 4 can also be one, as long as it can provide rotational damping force for the two rotating parts.

[0065] The second ends of the first bracket 21 and the second bracket 22, which are relatively far apart, can both be provided with protruding posts 203. The protruding posts 203 slide in cooperation with the corresponding measuring door panels. For example, the door panels are provided with sliding grooves (not shown in the figure), and the protruding posts 203 are slidably disposed inside the sliding grooves.

[0066] Of course, the first bracket 21 and the second bracket 22 are also provided with arc-shaped concave surfaces 204 on opposite sides to avoid the spring 1 and slider 4 on the corresponding sides.

[0067] Please refer to Figures 7 to 9In this embodiment of the application, the spring 1 in the damping assembly 370 is wound into a spiral shape by a spring wire 10. The number of turns N is an integer greater than or equal to 4, for example, N equals 4, 5, 6, 7, 8 or an integer greater than 8. The cross-section of the spring wire 10 is rectangular, combined with... Figure 10 Understand that the rectangle includes adjacent first side 1-2 and second side 1-1. The length c of the first side 1-2 ranges from 0.3mm to 0.55mm, and the length b of the second side 1-1 ranges from 0.3mm to 0.55mm. The first side 1-2 can be the length of the rectangular cross-section, and the second side 1-1 can be the width of the rectangular cross-section. The lengths of the first side 1-2 and the second side 1-1 can be any value within the aforementioned range. Of course, the lengths of the first side 1-2 and the second side 1-1 can be the same, or they can be different. This application embodiment shows a specific structure where the length b of the first side 1-2 is 0.35mm and the length c of the second side 1-1 is 0.5mm. In another example, the length b of the first side 1-2 can be 0.4mm, and the length c of the second side 1-1 can be 0.45mm.

[0068] The spring wire 10 is a cylindrical spring with a circular cross-section; its stiffness is...

[0069] The stiffness of the cylindrical spring with a rectangular cross-section (spring wire 10) is...

[0070] In both formulas, G represents the shear modulus of the spring material, where for steel G = 8 x 10⁻⁶. 10 Pa, bronze G = 4 x 10 10 Pa; a represents the diameter of the circular cross-section; n represents the effective number of coils of the spring (unitless); D represents the mean diameter of the spring; b represents the width of the rectangular cross-section; c represents the length of the rectangular cross-section.

[0071] Taking rectangular and circular cross-section springs with the same effective number of coils, the same mean diameter D, and the same material as examples... For example, taking a = 0.45 mm as an example, a circle with this cross-sectional size can be formed into a rectangular cross-section with b = 0.35 mm and c = 0.5 mm through a rolling process.

[0072] As can be seen from the above formula, for springs with the same number of effective coils, the same mean diameter D, and the same material, the stiffness of a rectangular cross-section spring is approximately 10% higher than that of a circular cross-section spring.

[0073] Compared to the circular cross-section of the spring wire 10, under the same spatial conditions, the rectangular cross-section helical spring 1 has greater stiffness, absorbs more energy, and increases the damping force generated by the damping component 370, which is beneficial to improving the user's feel when folding or unfolding electronic devices. Under the same damping force, the rectangular cross-section helical spring 1 occupies less space, which is beneficial to the arrangement of other components of electronic devices.

[0074] In this embodiment, the length c of the first side 1-2 is greater than the length b of the second side. The first side 1-2 extends along the axial direction of the columnar structure, and the length c of the first side 1-2 ranges from 0.45 mm to 0.55 mm. The length b of the second side ranges from 0.3 mm to 0.35 mm. Within the above range, the space occupied by the spring 1 formed by the spring wire 10 in the circumferential direction is relatively small, which can meet the usage requirements of most electronic devices.

[0075] Please refer to Figure 11 In this embodiment, the first side 1-2 and the second side 1-1 are connected by an arc 1-3. That is, in this embodiment, the corners of the rectangular cross-section of the spring wire 10 are not right angles, but rather arc-shaped. The radius r of the arc 1-3 is greater than or equal to 0.15 mm, and the length c of the first side 1-2 is greater than or equal to 0.36 mm. The arc-shaped corners of the rectangular cross-section in this embodiment result in lower stress, which is beneficial for improving the working performance and service life of the spring 1.

[0076] In summary, the rectangle described in the embodiments of this application can be a rectangle with adjacent sides perpendicular, or it can be a non-right-angle corner with adjacent sides connected by arcs or straight lines.

[0077] Please refer to Figure 12 In this embodiment of the application, the inner ring of the columnar structure is cylindrical, and the diameter D1 of the inner ring ranges from 0.85mm to 0.95mm. In a specific product, D1 can be from 0.88mm to 0.95mm.

[0078] The outer ring of the columnar structure is also cylindrical, with a diameter D2 ranging from 1.65mm to 1.72mm. Springs within this size range are small in size, offer high performance, and meet the compact design requirements of electronic devices.

[0079] In other words, the spring 1 in this embodiment is also a cylindrical spring 1.

[0080] Please refer to this again. Figure 8In this embodiment, when the spring 1 is in a non-compressed state, the axial length L0 of the columnar structure ranges from 7.6 mm to 7.8 mm. The spring 1 within this length range can basically meet the damping force requirements of most electronic devices and occupies relatively little space. The intercept p of the spring 1 can range from 0.7 mm to 0.9 mm. In one example, the axial length L0 of the columnar structure is 7.7 mm, and the intercept p is 0.8 mm.

[0081] In this embodiment, the effective number of coils in the columnar structure ranges from 6 to 8, for example, the effective number can be 6, 7, or 8. The total number of coils in the columnar structure ranges from 8 to 10, for example, 8, 9, or 10. The first spring coil 12 and the second spring coil 13 at the outermost ends of spring 1 are essentially not a complete turn. The effective spring coils 11 are located between the first spring coil 12 and the second spring coil 13. The number of effective spring coils 11 is the effective number of coils, and the total number of coils is approximately equal to the effective number of coils plus 2. Of course, special cases where the total number of coils differs from the effective number of coils by 1 or 0 are not excluded. This range of spring coils satisfies the damping performance requirements while occupying relatively little space.

[0082] The above parameters can be configured reasonably according to the specific product. The table below shows several specific configuration parameters for springs.

[0083] Spring serial number C / mm b / mm p / mm L0 / mm D1 / mm D2 / mm Valid number of laps Total laps 1 0.5 0.4 0.7 7.6 0.9 1.6 8 10 2 0.5 0.35 0.75 7.6 0.88 1.68 7 9 3 0.5 0.35 0.75 7.7 0.9 1.65 8 10 4 0.45 0.35 0.8 7.7 0.91 1.64 7 9 5 0.5 0.45 0.8 7.75 0.9 1.62 6 8 6 0.4 0.4 0.9 7.8 0.89 1.6 6 8

[0084] Force tests were conducted on the springs in the table above. The test conditions were as follows: 10 pre-compressions with a stroke of 5.85 mm to 5.05 mm, followed by one single-sided 5.75 mm stroke. When the spring was compressed to its minimum length, the pressure was greater than 22 N.

[0085] Life test conditions: 400,000 compressions with a stroke of 5.85mm to 5.05mm, with force decay not exceeding 15%.

[0086] Please refer to Figure 13 In this embodiment, the columnar structure includes a first spring coil 12 and a second spring coil 13 located at both ends. The relatively distant end faces of the first spring coil 12 and the second spring coil 13 are planes 121, which are perpendicular to the axial direction of the columnar structure. To better distinguish the planar areas, the planar areas are shaded in the figure. The figure only shows the outer end plane of the first spring coil 12. The outer end plane of the second spring coil 13 can be understood by referring to the outer end plane of the first spring coil 12. The sizes of the planes at both ends can be the same or different.

[0087] In this example, the two ends of the columnar structure are flat, which helps to increase the contact area between the spring and the components on both sides, improve the reliability of force transmission, and enhance the stability of the system.

[0088] Please refer to this again. Figure 12 To prevent the ends of the spring from being crushed, in this embodiment, the minimum thickness L1 of the first and second spring coils is greater than or equal to 0.4 times the axial extension length of the rectangular cross-section. For example, when c is 0.5 mm, the thickness L1 of the outermost spring coil is not less than 0.2 mm. This improves the stability of the system formed by spring 1.

[0089] To further improve the stability of the spring, the angle β of the circumference occupied by plane 121 is greater than 180 degrees, such as... Figure 13 As shown, Figure 13 The diagram shows two boundary lines on the outer end plane of the first spring coil 12 located below: the first boundary line 1211 and the second boundary line 1212. The included angle β between the first boundary line 1211 and the second boundary line 1212 is greater than 180 degrees, so as to maximize the contact area between the spring and its contacting member.

[0090] The spring wire can be made of SAE6150 chrome vanadium steel, INCONEL-750, INCONEL-718, NIMONIC 90, etc.

[0091] This application uses the application of a spring in a damping component as an example for illustration. Of course, the spring in this application embodiment can also be applied to other locations to provide elastic force.

[0092] For other structural details regarding electronic devices, please refer to current technology.

[0093] The damping component, rotating shaft mechanism, and electronic device in the embodiments of this application all include the aforementioned spring, and therefore the damping component, rotating shaft mechanism, and electronic device also have the aforementioned technical effects of the spring.

[0094] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0095] The directional terms mentioned in the embodiments of this application, such as "inner" and "outer", are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0096] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0097] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0098] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A rotating shaft mechanism, characterized in that, include A base, a first door panel, a second door panel, and a damping assembly; the base is located between the first door panel and the second door panel, and the first door panel and the second door panel are rotatable around the base; The damping assembly includes a first shaft, a second shaft, and a slider. The first shaft and the second shaft are arranged parallel to the axial direction of the rotating shaft mechanism and are both mounted on the base. The sliders are slidably sleeved on the first shaft and the second shaft, and the sliders can slide along the shafts. The damping assembly further includes a first bracket, a second bracket, and two springs. The first bracket and the second bracket have relatively close first ends. The first end of the first bracket is rotatably connected to the first shaft, and the first end of the second bracket is rotatably connected to the second shaft. The relatively far ends of the first bracket and the second bracket are second ends. The second ends of the first bracket and the second bracket are slidably connected to the door panel on the corresponding side, respectively. The two springs are respectively nested in the first shaft and the second shaft. Under the action of the springs, the first bracket, the second bracket, and the slider abut against each other. The spring includes a spring wire, which is spiraled N times to form a columnar structure. The inner diameter of the spring ranges from 0.88 mm to 0.95 mm. The cross-section of the spring wire is rectangular, and the length of the cross-section is greater than the width of the cross-section. The length of the cross-section extends along the axial direction of the columnar structure, and the width of the cross-section extends along the radial direction of the columnar structure. The length of the cross-section ranges from 0.3 mm to 0.55 mm, and the width of the cross-section ranges from 0.3 mm to 0.55 mm. N is a natural number greater than or equal to 4. The spring includes a first spring wire coil and a second spring wire coil located at both ends. The relatively distant end faces of the first and second spring wire coils are planes, which are perpendicular to the axial direction of the columnar structure and occupy an angle greater than 180 degrees around the circumference. The minimum thickness of the first spring wire coil is greater than or equal to 0.4 times the length of the first side.

2. The rotating shaft mechanism according to claim 1, characterized in that, The length of the cross-section of the spring wire ranges from 0.45 mm to 0.55 mm, and the width of the cross-section of the spring wire ranges from 0.3 mm to 0.35 mm.

3. The rotating shaft mechanism according to claim 2, characterized in that, The rectangle includes rounded corners, and the radius of the rounded corners is greater than or equal to 0.15 mm.

4. The rotating shaft mechanism according to claim 1, characterized in that, The outer diameter of the spring ranges from 1.65 mm to 1.72 mm.

5. The rotating shaft mechanism according to claim 1, characterized in that, In the uncompressed state, the axial length of the spring ranges from 7.6 mm to 7.8 mm.

6. The rotating shaft mechanism according to claim 1, characterized in that, The effective number of coils of the spring ranges from 6 to 8.

7. The rotating shaft mechanism according to claim 6, characterized in that, The total number of coils of the spring ranges from 8 to 10.

8. The rotating shaft mechanism according to claim 1, characterized in that, The spring has a cutoff range of 0.7 mm to 0.9 mm.

9. The rotating shaft mechanism according to claim 1, characterized in that, Both the first bracket and the second bracket have a first sleeve and a second sleeve, which are arranged axially at intervals. The slider includes a first slider and a second slider. Both the first slider and the second slider are slidably sleeved on the first shaft and the second shaft. The spring is sleeved on both the first shaft and the second shaft, and the spring is pressed between the first slider and the second slider. The first slider has a concave-convex fit with the first sleeve of the first bracket and the first sleeve of the second bracket, and the second slider has a concave-convex fit with the second sleeve of the first bracket and the second sleeve of the second bracket.

10. The rotating shaft mechanism according to claim 9, characterized in that, The first bracket and the second bracket are also provided with arc-shaped concave surfaces on opposite sides to avoid the spring and the slider on the corresponding side.

11. The rotating shaft mechanism according to any one of claims 1-10, characterized in that, The rotating shaft mechanism also includes a synchronization component, which is used to realize the synchronous rotation of the first door panel and the second door panel.

12. The rotating shaft mechanism according to claim 11, characterized in that, The rotating shaft mechanism further includes a first swing arm and a second swing arm. The first swing arm is connected between the first door panel and the base, and the first swing arm is rotatably connected to both the base and the first door panel. The second swing arm is connected between the second door panel and the base, and the second swing arm is rotatably connected to both the base and the second door panel.

13. An electronic device, characterized in that, Includes the rotating shaft mechanism described in any one of claims 1 to 12 above.

14. The electronic device according to claim 13, characterized in that, The electronic device includes a first body and a second body. Under the action of the rotating shaft mechanism, the first body and the second body can be folded and unfolded relative to each other.

15. The electronic device according to claim 14, characterized in that, The electronic device is a foldable screen phone, and the first main body and the second main body are the two mid-frames of the foldable screen phone, respectively.

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