Spring, damping assembly and electronic device

Abstract

A spring (1). The cross-section of a spring wire (10) of the spring is rectangular; in a same spatial condition, the helical spring having a rectangular cross-section has greater stiffness and absorbs more energy. Also disclosed is a damping assembly (370) comprising the spring. The spring can increase the damping force generated by the damping assembly. Also disclosed is an electronic device comprising the spring or the damping assembly. The spring or the damping assembly can improve a user's feel when folding or unfolding the electronic device. When satisfying the same damping force, the helical spring having a rectangular cross-section occupies less space, and the arrangement of other components of the electronic device is facilitated.

Description

Spring, damping assembly and electronic device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 8, 2023, with application number 202322453384.X, and invention name “A spring, damping assembly and electronic device”, the entire contents of which are incorporated by reference in the embodiments of this application. Technical Field

[0002] The embodiments of the present application relate to the technical field of electronic products, and in particular to a spring, a damping assembly, and an electronic device. Background Art

[0003] Currently, electronic devices such as notebooks and foldable screen mobile phones include a first body, a hinge mechanism and a second body, wherein the first body and the second body are folded and unfolded relative to each other through the hinge mechanism. Please understand this in conjunction with the electronic devices shown in Figures 1 to 3, which respectively show schematic diagrams of the electronic device in a flattened state, an intermediate unfolded state and a folded state.

[0004] The hinge mechanism is typically equipped with a damping assembly, which improves the rotational feel of the hinge mechanism and allows the first and second bodies to hover at a predetermined deployed position. Currently, the damping assembly typically features a convex-concave surface fit, with a cylindrical spring providing the axial force. The spring wire of the cylindrical spring has a circular cross-section.

[0005] On the premise of achieving normal functions of electronic equipment, how to reduce the volume of the damping component as much as possible is a technical issue that has always been of concern to those skilled in the art.

[0006] Summary of the Invention

[0007] Embodiments of the present application provide a spring with high rigidity and small space occupation, as well as a damping assembly and electronic device including the spring.

[0008] In a first aspect, embodiments of the present application provide a spring comprising a spring wire, wherein the spring wire is helically wound N times to form a columnar structure, where N is an integer greater than or equal to 4, for example, N is 4, 5, 6, 7, 8, or an integer greater than 8. The cross-section of the spring wire is rectangular, and the rectangle includes a first side and a second side adjacent to each other, wherein the length of the first side ranges from 0.3 mm to 0.55 mm, and the length of the second side ranges from 0.3 mm to 0.55 mm. Ideally, the first and second sides of the rectangle are perpendicular, but due to limitations such as processing technology, the first and second sides may be approximately perpendicular, and a certain deviation is permitted as long as it does not affect the overall effect.

[0009] Compared with spring wires with circular cross-sections, under the same spatial conditions, rectangular cross-section coil springs have greater stiffness, absorb more energy, and increase the damping force generated by the damping component, which helps improve the user's feel when folding or unfolding electronic devices; while meeting the same damping force, rectangular cross-section coil springs occupy less space, which is beneficial to the layout of other components of electronic equipment.

[0010] In one example, the length of the first side is greater than the length of the second side, and the first side extends axially along the columnar structure. The length of the first side ranges from 0.45 mm to 0.55 mm, and the length of the second side ranges from 0.3 mm to 0.35 mm. A spring formed by a spring wire within this range occupies a relatively small circumferential space, which can meet the requirements of most electronic devices.

[0011] In one example, the first side and the second side are connected by an arc, the radius of the arc is greater than or equal to 0.15 mm, and after the arc is processed, the length of the first side is greater than or equal to 0.36 mm. The corners of the rectangular cross section in the embodiment of the present application are arc-shaped, where stress is reduced, which is conducive to improving the working performance and service life of the spring.

[0012] In one example, the inner ring of the columnar structure is cylindrical, and the diameter of the inner ring ranges from 0.88 mm to 0.95 mm. The inner ring of the columnar structure is cylindrical. The spring within this size range has a small volume and high working performance, which can meet the small volume design requirements of electronic equipment.

[0013] In one example, the outer ring of the columnar structure is cylindrical, and the outer ring of the columnar structure is cylindrical, and the diameter of the outer ring ranges from 1.65mm to 1.72mm. Springs within this size range are small in size and have high working performance, which can meet the requirements of small-volume design of electronic equipment.

[0014] In one example, in a non-compressed state, the length of the columnar structure along the axial direction ranges from 7.6 mm to 7.8 mm. Springs within this length range can basically meet the damping force requirements of most electronic devices and occupy a small 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. Spring coils within this range meet damping performance requirements while taking up less space, facilitating the overall structural layout of electronic equipment.

[0016] In one example, the intercept of the spring ranges from 0.7 mm to 0.9 mm. In this example, the intercept of the spring takes into account both usage requirements and space occupation.

[0017] In one example, the columnar structure includes a first spring wire coil and a second spring wire coil at either end. The distal end surfaces of the first and second spring wire coils are flat, perpendicular to the axis of the columnar structure. In this example, the flat end surfaces of the columnar structure increase the contact area between the spring and its two adjacent components, improving the reliability of force transmission and enhancing system stability.

[0018] In one example, the minimum thickness of the first spring wire coil and the second spring wire coil is greater than or equal to 0.4 times the axial length of the rectangular cross section, which can improve the stability of the system formed by the spring.

[0019] In one example, the angle of the circumference occupied by the plane is greater than 180 degrees, so as to maximize the contact area between the spring and its contact member and improve the stability of the system in which the spring is located.

[0020] On the second aspect, an embodiment of the present application also provides a damping assembly, including a bracket, a shaft, a slider and a spring of any one of the above items, the spring is nested in the shaft, the slider slides along the shaft, and 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 bracket includes a first bracket and a second bracket, the shaft includes a first shaft and a second shaft, the first bracket and the second bracket include relatively close first ends, the first end of the first bracket is rotatably connected to the first shaft, the first end of the second bracket is rotatably connected to the second shaft, the slider is slidingly connected to the first shaft and the second shaft at the same time, and the slider and the first bracket and the second bracket are both concave and convex matched; in this embodiment, the slider slides along the first shaft and the second shaft, the structure is simple, the first bracket and the second bracket are also connected to the first shaft and the second shaft, respectively, and the arrangement is compact.

[0022] In one example, the ends of the first and second brackets that are relatively far apart are referred to as second ends. The second ends of the first and second brackets are each configured to be slidably connected to a corresponding side door panel of the electronic device. Driven by the door panels, the first and second brackets can rotate relative to their corresponding shafts, achieving high synchronization between the movement of the brackets and the door panels.

[0023] In one example, the first bracket and the second bracket each have a first sleeve and a second sleeve, which are spaced apart in the axial direction. The slider includes a first slider and a second slider, which are both slidably mounted on the first shaft and the second shaft. The first shaft and the second shaft are both provided with a spring, and the spring is press-fitted 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. In this example, sliders are provided on both sides of the spring, as well as cam portions that mate with the sliders, thereby increasing the damping force. The damping assembly has a compact structure and occupies a small space.

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

[0025] In a third aspect, an embodiment of the present application further provides an electronic device comprising any of the above-mentioned springs or any of the above-mentioned damping components.

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

[0027] In one example, the electronic device is a foldable screen mobile phone, and the first body and the second body are two middle frames of the foldable screen mobile phone respectively;

[0028] Alternatively, the electronic device is a notebook computer, and the first body and the second body are respectively the display side and the keyboard side of the notebook computer.

[0029] The damping assembly and electronic device provided in the embodiments of the present application include the above-mentioned spring, so the damping assembly and electronic device also have the above-mentioned technical effects of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic structural diagram of an electronic device in an unfolded state according to an embodiment of the present application;

[0031] FIG2 is a schematic structural diagram of the electronic device shown in FIG1 in an intermediate unfolded state;

[0032] FIG3 is a schematic diagram of the electronic device shown in FIG1 in a folded state;

[0033] FIG4 is a schematic structural diagram of the rotating shaft mechanism of the electronic device shown in FIG1 ;

[0034] FIG5 is a schematic structural diagram of the damping assembly in the rotating shaft mechanism shown in FIG4 ;

[0035] FIG6 is an exploded schematic diagram of the damping assembly shown in FIG4 ;

[0036] FIG7 is a schematic diagram of a spring in the damping assembly shown in FIG6 ;

[0037] FIG8 is a front view of the spring shown in FIG7;

[0038] FIG9 is a cross-sectional view taken along line AA of the spring shown in FIG8 ;

[0039] FIG10 is a schematic cross-sectional view of the spring wire in FIG7 ;

[0040] FIG11 is a schematic cross-sectional view of a spring wire in another embodiment of the present application;

[0041] FIG12 is a partial enlarged view of point A1 in FIG9;

[0042] FIG13 is a view taken along the direction B in FIG8 .

[0043] Among them, in Figures 1 to 13:

[0044] 110 first body; 120 second 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 component; 370 damping component;

[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 bracket; 21 first bracket; 21a inner hole; 22 second bracket; 201 first sleeve; 202 second sleeve; 203 protruding column; 204 arc-shaped concave surface;

[0047] 3 axis body; 31 first axis body; 32 second axis body; 301 slot;

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

[0049] 5 circlip Specific embodiments

[0050] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present application, the embodiments of the present application are further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] The embodiments of the present application provide a spring with high stiffness and small space occupation, which can be applied to electronic devices. Of course, the spring of the embodiments of the present application 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, vehicle-mounted device, augmented reality (AR) / virtual reality (VR) device, laptop computer, ultra-mobile personal computer (UMPC), netbook, personal digital assistant (PDA), or a professional shooting device such as a digital camera, SLR camera / micro-single camera, sports camera, gimbal camera, drone, etc. The embodiments of the present application do not limit the specific type of electronic device. For ease of understanding, the technical solution and technical effects will be described below using a foldable screen mobile phone as an example.

[0052] Please refer to FIG1 again, which is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

[0053] The electronic device in the embodiment of the present application 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 respectively 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 respectively show schematic diagrams of the electronic device in a flattened state, an intermediate unfolded state and a folded state. Figure 1 takes a folding screen mobile phone as an example. The first body 110 and the second body 120 are respectively the two middle frames of the folding screen mobile phone. When the electronic device is a laptop computer, the first body 110 can be the display side of the laptop computer, and the second body 120 can be the keyboard side of the laptop computer.

[0054] In the embodiment of the present application, the display screen 200 includes a display module and a transparent cover plate. The display module can display images and videos, etc. The display module can adopt a liquid crystal display 200 (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), an electrophoretic display technology (E-Ink), etc. The display screen 200 of current foldable screen electronic devices mostly adopts OLED. The transparent cover plate covers the outside of the display module and plays a role in protecting the display module. The transparent cover plate can be a glass cover plate, of course, it can also be other transparent materials that can provide a protective function, for example, the transparent cover plate can be transparent polyimide. The display screen 200 can also have a touch function, that is, the display screen 200 can be a touch screen.

[0055] Driven by the first body 110 and the second body 120 , the display screen 200 can be relatively folded and unfolded.

[0056] Referring to FIG4 , in the embodiment of the present application, the hinge 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 connected to each other on either side of the base 310. The first swing arm 320 is connected between the first door panel 340 and the base 310. The first swing arm 320 and the first door panel 340 are also connected in rotation, 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. The second swing arm 330 and the second door panel 350 are also connected in rotation, so that the second door panel 350 can rotate around the base 310 via the second swing arm 330. Among them, the rotation of the swing arm and the door panel, and the rotation of the swing arm and the base 310 can be achieved through arc-shaped sliding grooves and arc-shaped blocks, and of course can also be achieved through other forms.

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

[0058] In the embodiment of the present application, the first door panel 340 and the second door panel 350 are fixedly connected to the first body 110 and the second body 120 respectively, 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 assembly 360 and a damping assembly 370. The synchronization assembly 360 is used to achieve synchronous rotation of the first door panel 340 and the second door panel 350. The synchronization assembly 360 can be a gear mechanism, or alternatively, a screw mechanism. FIG4 shows the synchronization assembly 360 in the form of a gear mechanism. The number and position of the synchronization assemblies 360 can be appropriately selected based on the specific structure of the rotating shaft mechanism 300. FIG4 shows an example of providing two sets of synchronization assemblies 360.

[0060] In the embodiment of the present application, the damping assembly 370 is used to generate a damping force for the rotation of the first door panel 340 and the second door panel 350. Referring to Figures 5 and 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 are both mounted on the base 310. Specifically, the 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 extends through both 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 mounted 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 axially relative to the first shaft 31 and the second shaft 32. The first shaft 31 and the second shaft 32 are both sleeved with springs 1, and the two springs 1 are press-fitted between the first slider 41 and the second slider 42. The end surfaces of the first slider 41 and the second slider 42 that are relatively far away from each other each have two concave and convex surfaces 401.

[0061] The relatively close ends of the first bracket 21 and the second bracket 22 are defined as first ends. The first end of the first bracket 21 is rotatably connected to the first shaft 31, and the first end of the second bracket 22 is rotatably connected to the second shaft 32. Specifically, each of the first bracket 21 and the second bracket 22 has two sleeves spaced apart along the axial direction. The two sleeves of the first bracket 21 are coaxial with the first shaft 31, and the first shaft 31 extends through the inner holes 21a of the two sleeves of the first bracket 21. The two sleeves of the second bracket 22 are coaxial with the second shaft 32, and the second shaft 32 extends through the inner holes 21a of the two sleeves of the second bracket 22. For the sake of convenience of description, the embodiment of the present application defines the two sleeves arranged along the axial direction 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 are in concave and convex contact with the two first sleeves 201, and the two concave and convex surfaces 401 of the second slider 42 are in concave and convex contact with the two second sleeves 202.

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

[0063] The axial limitation of the first shaft body 31 and the second shaft body 32 and the first bracket 21 and the second bracket 22 can be achieved by means of a retaining spring 5 and a retaining groove 301. For example, a retaining groove 301 is provided at both ends of the first shaft body 31 and the second shaft body 32, and the retaining spring 5 is installed inside the retaining groove 301. The retaining springs 5 ​​at both ends limit the axial movement of the first bracket 21 and the second bracket 22 relative to each shaft body 31.

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

[0065] The second ends of the first bracket 21 and the second bracket 22 which are relatively far away can both be provided with a boss 203, which slides with the corresponding door panel. For example, a slide groove (not shown in the figure) is provided on the door panel, and the boss 203 is slidably provided inside the slide groove.

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

[0067] Referring to Figures 7 to 9 , in the embodiment of the present application, the spring 1 in the damping assembly 370 is wound helically by a spring wire 10, with the number of windings N being an integer greater than or equal to 4, for example, N being 4, 5, 6, 7, 8, or an integer greater than 8. The cross-section of the spring wire 10 is rectangular. As understood in conjunction with Figure 10 , the rectangle includes adjacent first and second sides 1-2 and 1-1. The length c of the first side 1-2 ranges from 0.3 mm to 0.55 mm, and the length b of the second side 1-1 ranges from 0.3 mm to 0.55 mm. 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 and second sides 1-2 and 1-1 can be any value within the aforementioned numerical range. Of course, the lengths of the first and second sides 1-2 and 1-1 can also be the same, or the values ​​of the first and second sides can be different. The embodiment of the present application shows a specific structure in which the length b of the first side 1-2 is 0.35 mm and the length c of the second side 1-1 is 0.5 mm. Of course, in another example, the length b of the first side 1-2 can be 0.4 mm and the length c of the second side 1-1 can be 0.45 mm.

[0068] The cross section of the spring wire 10 is a cylindrical spring with a circular shape and a stiffness of

[0069] The cross section of the spring wire 10 is a cylindrical spring with a rectangular shape and a stiffness of

[0070] In the two formulas, G indicates the shear modulus of the spring material, where G for steel is 8x10 10 Pa, bronze G = 4x10 10Pa; a represents the diameter of the circular cross section; n represents the number of effective coils of the spring, without unit; 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] Take the rectangular cross-section spring and the circular cross-section spring with the same effective number of coils, the same mean diameter D and the same material as an example. For example, taking a=0.45mm as an example, the circular cross-section with this size can be formed into a rectangular cross-section with b=0.35mm and c=0.5mm by calendering process.

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

[0073] Compared with the spring wire 10 with a circular cross-section, under the same spatial conditions, the rectangular cross-section coil spring 1 has greater stiffness and absorbs more energy, thereby increasing the damping force generated by the damping component 370, which is beneficial to improving the user's feel when folding or unfolding the electronic device; while meeting the same damping force, the rectangular cross-section coil spring 1 occupies less space, which is beneficial to the layout of other components of the electronic device.

[0074] In the embodiment of the present application, 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 axially along the columnar structure. The length c of the first side 1-2 ranges from 0.45 mm to 0.55 mm, and the length b of the second side ranges from 0.3 mm to 0.35 mm. Within this range, the spring 1 formed by the spring wire 10 occupies a relatively small circumferential space, which can meet the requirements of most electronic devices.

[0075] Referring to Figure 11 , in the embodiment of the present application, the first side 1-2 and the second side 1-1 are connected by an arc 1-3. In other words, the corners of the rectangular cross-section of the spring wire 10 in the embodiment of the present application are not right angles, but 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 the embodiment of the present application reduce stress, which helps improve the performance and service life of the spring 1.

[0076] In summary, the rectangle described in the embodiments of the present application can be a rectangle with adjacent sides perpendicular to each other, or a rectangle with non-right angles with adjacent sides connected by arcs or straight lines.

[0077] Please refer to Figure 12. In the embodiment of the present 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 0.88mm to 0.95mm.

[0078] The outer ring of the columnar structure is also cylindrical, and the diameter D2 of the outer ring ranges from 1.65mm to 1.72mm. The spring 1 within this size range is small in size and has high working performance, which can meet the small size design requirements of electronic equipment.

[0079] That is to say, the spring 1 in the embodiment of the present application is also a cylindrical spring 1.

[0080] Referring again to Figure 8 , in the embodiment of the present application, when 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. Spring 1 within this length range can generally meet the damping requirements of most electronic devices while occupying a relatively small space. The intercept p of 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 the embodiment of the present application, 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, and the total number of coils in the columnar structure ranges from 8 to 10, for example, 8, 9, or 10. The first spring wire coil 12 and the second spring wire coil 13 at the outermost end of the spring 1 are essentially incomplete coils. The effective coils 11 are located between the first spring wire coil 12 and the second spring wire coil 13. The number of effective coils 11 is the effective number of coils, and the total number of coils is roughly 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. The number of coils of the spring 1 within this range can both meet the damping performance requirements and occupy a small space.

[0082] The above parameters can be reasonably configured according to the specific product. The following table gives the specific configuration parameters of several springs.

[0083] The springs in the table above were subjected to force tests, where the test conditions were: pre-compression 10 times with a stroke of 5.85mm to 5.05mm, and then one time with a single-side stroke of 5.75mm. When the spring was compressed to its minimum length, the pressure was greater than 22N.

[0084] Life test conditions: Compression 400,000 times according to the stroke range of 5.85mm to 5.05mm, and the force reduction shall not exceed 15%.

[0085] Please refer to Figure 13. In this embodiment of the present application, the columnar structure includes a first spring wire coil 12 and a second spring wire coil 13 located at each end. The end surfaces of the first spring wire coil 12 and the second spring wire coil 13 that are relatively far apart are planes 121. Planes 121 are perpendicular to the axial direction of the columnar structure. To better distinguish the plane areas, the plane areas are shaded in the figure. The figure only shows the plane of the outer end of the first spring wire coil 12. The plane of the outer end of the second spring wire coil 13 can be understood with reference to the plane of the outer end of the first spring wire coil 12. The planes at both ends can be the same size, or of course, different.

[0086] In this example, both end surfaces 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 improve the stability of the system.

[0087] Referring again to Figure 12 , to prevent the ends of the spring from being crushed, in this embodiment of the present application, the minimum thickness L1 of the first and second spring wire coils is greater than or equal to 0.4 times the axial length of the rectangular cross-section. For example, when c is 0.5 mm, the thickness L1 of the outermost spring wire coil is no less than 0.2 mm. This improves the stability of the system formed by the spring 1.

[0088] In order to further improve the stability of the spring, the angle β of the circumference occupied by the plane 121 is greater than 180 degrees, as shown in Figure 13. Figure 13 shows two boundary lines of the outer end plane of the first spring wire coil 12 located below: the first boundary line 1211 and the second boundary line 1212. The 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 contact component.

[0089] The material of the spring wire can be SAE6150 chrome vanadium steel, INCONEL-750, INCONEL-718, NIMONIC 90, etc.

[0090] The embodiment of the present application is described by taking the application of a spring to a damping component as an example. Of course, the spring in the embodiment of the present application can also be applied to other positions to provide elastic force requirements.

[0091] For other structures of electronic devices, please refer to current technology.

[0092] The damping assembly, the rotating shaft mechanism and the electronic device in the embodiments of the present application all include the above-mentioned spring, so the damping assembly, the rotating shaft mechanism and the electronic device also have the above-mentioned technical effects of the spring.

[0093] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0094] The directional terms mentioned in the embodiments of the present application, such as "inside" and "outside", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0095] In the description of the embodiments of the present application, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0096] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0097] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A spring, characterized in that: It includes a spring wire, which is spiraled N times to form a columnar structure. The cross-section of the spring wire is a rectangle, and the rectangle includes a first side and a second side adjacent to each other. The length of the first side ranges from 0.3 mm to 0.55 mm, and the length of the second side ranges from 0.3 mm to 0.55 mm. N is a natural number greater than or equal to 4.

2. The spring according to claim 1, characterized in that: The length of the first side is greater than that of the second side. The first side extends along the axial direction of the columnar structure. The length of the first side ranges from 0.45 mm to 0.55 mm, and the length of the second side ranges from 0.3 mm to 0.35 mm.

3. The spring according to claim 2, characterized in that: The first side and the second side are connected by an arc, the radius of the arc is greater than or equal to 0.15 mm, and the length of the first side is greater than or equal to 0.36 mm.

4. The spring according to claim 1, characterized in that: The inner ring of the columnar structure is cylindrical, and the diameter of the inner ring ranges from 0.88 mm to 0.95 mm.

5. The spring according to claim 4, characterized in that: The outer ring of the columnar structure is cylindrical, and the diameter of the outer ring ranges from 1.65 mm to 1.72 mm.

6. The spring according to claim 1, characterized in that: In a non-compressed state, the length of the columnar structure along the axial direction ranges from 7.6 mm to 7.8 mm.

7. The spring according to claim 1, characterized in that: The effective number of turns in the columnar structure ranges from 6 to 8 turns, and the total number of turns of the columnar structure ranges from 8 to 10 turns.

8. The spring according to claim 1, characterized in that: The intercept of the spring ranges from 0.7 mm to 0.9 mm.

9. The spring according to any one of claims 1 to 8, characterized in that: The columnar structure comprises a first spring wire coil and a second spring wire coil located at two ends, and end surfaces of the first spring wire coil and the second spring wire coil that are relatively far away from each other are planes, and the planes are perpendicular to the axial direction of the columnar structure.

10. The spring according to claim 9, characterized in that: The minimum thickness of the first spring wire coil and the second spring wire coil is greater than or equal to 0.4 times the length of the side of the rectangular cross-section extending in the axial direction.

11. The spring according to claim 9, characterized in that: The angle of the circumference occupied by the plane is greater than 180 degrees.

12. A damping assembly, characterized in that: It comprises a bracket, a shaft, a slider and the spring according to any one of claims 1 to 11, wherein the spring is nested in the shaft, the slider slides along the shaft, and under the action of the spring, the concave and convex matching surfaces of the bracket and the slider abut against each other.

13. The damping assembly according to claim 12, characterized in that The shaft body includes a first shaft body and a second shaft body, the slider is slidably connected to the first shaft body and the second shaft body at the same time, the bracket includes a first bracket and a second bracket, the first bracket and the second bracket include relatively close first ends, the first end of the first bracket is rotatably connected to the first shaft body, and the first end of the second bracket is rotatably connected to the second shaft body, and the slider is concave-convexly matched with the first bracket and the second bracket.

14. The damping assembly according to claim 13, characterized in that The ends of the first bracket and the second bracket that are relatively far away are second ends. The second ends of the first bracket and the second bracket are respectively used for sliding connection with corresponding side door panels of the electronic equipment.

15. The damping assembly according to claim 14, characterized in that The first bracket and the second bracket both have a first sleeve and a second sleeve, which are arranged axially at intervals. The slider includes a first slider and a second slider, and the first slider and the second slider are both slidably sleeved on the first shaft body and the second shaft body. The first shaft body and the second shaft body are both sleeved with the spring, and the spring is pressed between the first slider and the second slider. The first slider is in concave-convex fit with the first sleeve of the first bracket and the first sleeve of the second bracket, and the second slider is in concave-convex fit with the second sleeve of the first bracket and the second sleeve of the second bracket.

16. The damping assembly according to claim 15, characterized in that The opposite sides of the first bracket and the second bracket are also provided with arc-shaped concave surfaces to avoid the spring and the slider on the corresponding side.

17. An electronic device, characterized in that It comprises the spring according to any one of claims 1 to 11, or the damping assembly according to any one of claims 12 to 16.

18. The electronic device according to claim 17, characterized in that: The electronic device comprises a first body, a second body and a hinge mechanism. Under the action of the hinge mechanism, the first body and the second body can be relatively folded and unfolded. The hinge mechanism comprises at least one damping component.

19. The electronic device according to claim 18, characterized in that: The electronic device is a folding screen mobile phone, and the first body and the second body are two middle frames of the folding screen mobile phone respectively; Alternatively, the electronic device is a notebook computer, and the first body and the second body are respectively a display side and a keyboard side of the notebook computer.

Images