Rotating shaft mechanism, design method thereof, and electronic device

Abstract

The application discloses a rotating shaft mechanism and a design method thereof and an electronic device, and belongs to the technical field of electronic devices. The rotating shaft mechanism comprises a base, a first swing arm and an adjusting piece. When the first swing arm is in an unfolded position, an angle between the first swing arm and the base is a flattened angle. The adjusting piece is rigidly connected with the first swing arm, the adjusting piece has a first abutting surface, the base has a second abutting surface, and the first abutting surface and the second abutting surface abut each other when the first swing arm is in the unfolded position. The adjusting piece is configured to be capable of moving in a first direction relative to the first swing arm so that the flattened angle is located in a preset angle range. The electronic device comprises a first sub-housing, a second sub-housing and the rotating shaft mechanism. The application is favorable for guaranteeing the reliability of the electronic device and improving the yield of the electronic device or the rotating shaft mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a rotating shaft mechanism and a design method thereof, and electronic equipment. Background Art

[0002] With the increasing popularity of electronic devices such as mobile phones and tablets, they have become an indispensable part of people's daily lives. To meet the convenience and portability of electronic devices, foldable electronic devices have emerged. With the gradual maturity and application of flexible display technology, foldable electronic devices not only meet the requirements of portability, but also allow users to experience the visual impact brought by large screens.

[0003] A foldable electronic device includes two middle frames and a hinge mechanism. The two middle frames are respectively connected to the hinge mechanism, and the flexible display screen is fixedly connected to the two middle frames. The foldable electronic device switches between the folded state and the unfolded state through the hinge mechanism. In the unfolded state, the parts of the flexible display screen that are respectively fixed to the middle frames need to be basically in the same plane. This state can be said to be the flattened state of the flexible display screen. In the flattened state, the user experience is also the best. However, due to the thinner hinge mechanism and middle frame, and the precision limit of the processing technology, they cannot meet the tolerance band requirements of the flattened state, resulting in a low yield of the electronic device or hinge mechanism. Summary of the Invention

[0004] The present application provides a hinge mechanism, a design method thereof, and an electronic device to solve the technical problem that the hinge mechanism and the middle frame are made thinner and thinner, and the processing technology has precision limits, which cannot meet the tolerance band requirements of the flattened state, resulting in low yield of the electronic device or hinge mechanism.

[0005] The technical solution is as follows:

[0006] A first aspect of the present application provides a rotating shaft mechanism, comprising: a base, a first swing arm, and an adjusting member;

[0007] The first swing arm is rotatably connected to the base, and the first swing arm can rotate relative to the base between an unfolded position and a folded position; when the first swing arm is in the unfolded position, the angle formed between the first swing arm and the base is a flattening angle;

[0008] The adjusting member is rigidly connected to the first swing arm, the adjusting member has a first abutting surface, and the base has a second abutting surface. When the first swing arm is in the extended position, the first abutting surface abuts the second abutting surface.

[0009] The adjusting member is configured to be movable in a first direction relative to the first swing arm so that the flattening angle is within a preset angle range.

[0010] By adopting the above scheme, when designing the first swing arm and the base, the accuracy of the processing technology can be moderately reduced, and the first swing arm and the base can be designed to be over-expanded, that is, the flattening angle is greater than 180 degrees, thereby reducing the processing accuracy of both and reducing the error requirement during flattening; an adjusting member is installed on the first swing arm, and the adjusting member is rigidly connected to the first swing arm, so that the adjusting member is moved in the first direction of the first swing arm to adjust the flattening angle between the first swing arm and the base when the first swing arm is in the expanded position, and the flattening angle meets the preset angle requirement. That is to say, the present application can fine-tune the flattening angle through the adjusting member while moderately reducing the processing accuracy of the first swing arm and the base so that the flattening angle between the first swing arm and the base is within the range of 180 degrees. The flattening angle between the first and second abutment surfaces meets the tolerance band requirement of the flattened state; when the flattening angle meets the preset angle requirement, due to the rigid connection between the first swing arm and the adjusting member, the stability of the first swing arm in the expanded position is guaranteed. Therefore, at the instant when the first abutment surface abuts the second abutment surface, the second abutment surface applies force to the first abutment surface, and the force can be directly transmitted to the first swing arm. Since the first swing arm is still rotationally connected to the base, it is not easy to jitter at the instant when the first abutment surface abuts the second abutment surface, which is conducive to avoiding a short moment of over-expansion, thereby ensuring that the display screen on the electronic device will not be pulled or squeezed due to over-expansion, thereby ensuring the reliability of the electronic device and improving the yield of the electronic device or the hinge mechanism.

[0011] In some implementations, the first swing arm has a first surface configured to be disposed opposite the second abutment surface when the first swing arm is in the deployed position;

[0012] The first abutting surface can be convex from the first surface;

[0013] When the first swing arm is in the extended position, the distance between the first surface and the first abutting surface can be changed during the movement of the adjusting member in the first direction relative to the first swing arm.

[0014] By adopting the above scheme, the first abutting surface is used to protrude the first surface so that the first abutting surface and the second abutting surface abut each other, and since the adjusting member is rigidly connected to the first swing arm, when the adjusting member moves relative to the first swing arm, the distance between the first surface and the first abutting surface changes, and the distance between the first surface and the second abutting surface can be changed, thereby adjusting the flattening angle to meet the preset angle range.

[0015] In some implementations, the first direction has an angle with the rotation axis of the first swing arm relative to the base.

[0016] By adopting the above solution, it is helpful to simplify the design of the adjustment member for adjusting the flattening angle, and the adjustment of the flattening angle can be achieved more conveniently, and the adjustment accuracy can be improved.

[0017] In some implementations, the angle between the first direction and the rotation axis of the first swing arm relative to the base is a right angle; the first direction is also parallel to the length direction of the first swing arm.

[0018] By adopting the above solution, the adjusting member can directly change the flattening angle when moving along the first direction, thereby conveniently controlling the accuracy of the flattening angle to meet the preset angle range.

[0019] In some implementations, the adjustment member is further configured to be fixedly connected to the first swing arm after the flattening angle is within a preset angle range.

[0020] By adopting the above solution, after the flattening angle is adjusted by the adjusting member so that it is within the preset angle range, the adjusting member is fixedly connected to the first swing arm. In this way, during the use of the rotating shaft mechanism, the adjusting member and the first swing arm will not be displaced, which is conducive to ensuring that the flattening angle is maintained within the preset angle range during the use of the rotating shaft mechanism.

[0021] In some implementations, the adjusting member is fixed to the first swing arm by welding.

[0022] By adopting the above solution, after adjusting the flattening angle using the adjusting member, the adjusting member and the first swing arm are secured together by welding, thereby achieving a rigid connection between the two. This improves the stability of the overall structure formed by the adjusting member and the first swing arm, ensuring that it is less likely to deform or loosen when subjected to external loads or impacts. Furthermore, the rigid connection improves stress transfer between the adjusting member and the first swing arm, allowing each component to better share the load, thereby extending the service life of the overall structure. Secondly, after adjusting the flattening angle using the adjusting member, the adjusting member and the first swing arm can be assembled together in one step by welding, without the need for additional connectors or fasteners. This not only reduces production costs but also simplifies the assembly process and improves production efficiency. Furthermore, welding ensures the relative position between the two, thus ensuring precision. Finally, the strong welded connection makes the connection between the adjusting member and the first swing arm less susceptible to damage, reducing the need for routine maintenance and repairs.

[0023] In some implementations, the first swing arm has an adjustment hole extending along the first direction, the adjustment member is a columnar structure, and at least a portion of the columnar structure is located in the adjustment hole;

[0024] The first abutting surface is an end surface of the columnar structure.

[0025] By adopting the above solution, an adjustment hole is opened on the first swing arm, which facilitates manufacturing and installation of the adjustment member; and the columnar adjustment member can have a stronger supporting force, which makes it easier to achieve a flattening angle that meets the preset angle range with greater stability.

[0026] In some implementations, the adjustment hole has an internal thread, and the columnar structure has an external thread matching the internal thread.

[0027] By adopting the above solution, the adjusting member and the first swing arm are threadedly connected, so that the flattening angle can be accurately adjusted and the rigid connection between the adjusting member and the first swing arm can be ensured. Moreover, when the adjusting member adjusts the flattening angle so that the flattening angle is within a preset angle range, when the two are fixed by welding or other means, it can also be ensured that the adjusted flattening angle is not easily changed.

[0028] In some implementations, the columnar structure includes an inserting portion and an abutting portion, wherein the inserting portion is connected to the abutting portion;

[0029] At least a portion of the insertion portion is located in the adjustment hole, and a diameter of the abutment portion is larger than a diameter of the insertion portion;

[0030] The first abutting surface is located on the abutting portion.

[0031] By adopting the above scheme, the inserting part is inserted into the adjusting hole to ensure the rigid connection between the adjusting part and the first swing arm, and the diameter of the abutting part is larger than the diameter of the inserting part, so that the first abutting surface has a larger contact area; when the first abutting surface contacts the second abutting surface, it helps to disperse the load and enhance the stability and reliability of the structure; this can also increase the service life of the adjusting part, even if the abutting part is worn during long-term use, it will not affect the accuracy of the flattening angle; in addition, due to the existence of the abutting part, the first abutting surface can have a larger and appropriate area, which can reduce the generation of pits on the base during the continuous contact between the first abutting surface and the second abutting surface, affecting the accuracy of the flattening angle.

[0032] In some implementations, the first swing arm further has an injection hole, the injection hole is connected to the adjustment hole, and an axial direction of the adjustment hole and an axial direction of the injection hole form an angle;

[0033] The injection hole is filled with solid phase change material to fix the adjustment member to the first swing arm.

[0034] By adopting the above solution, it is beneficial to achieve a fixed connection between the adjusting member and the first swing arm by filling the phase change material.

[0035] In some implementations, the phase change material is glue or solder.

[0036] By adopting the above solution, the cost of fixing the adjusting member and the first swing arm can be reduced, and the fixing method is relatively convenient and easy to implement.

[0037] In some implementations, the first swing arm has a sliding portion and a rotating portion, and the sliding portion is fixedly connected to the rotating portion;

[0038] The adjusting member is mounted on the sliding portion, and the first surface is provided on the sliding portion;

[0039] The base includes a middle beam, the second abutting surface is provided on the middle beam, and the rotating portion is rotatably connected to the middle beam;

[0040] The rotating shaft mechanism further includes a connecting member, and the sliding portion is slidably connected to the connecting member;

[0041] The connecting piece has a sliding groove, the sliding portion is located in the sliding groove, and the sliding portion can move along the guiding direction of the sliding groove.

[0042] By adopting the above scheme, an adjusting member is provided on the first swing arm that is slidably connected to the base, which is conducive to the installation and adjustment of the adjusting member. That is, after the assembly of the rotating shaft mechanism is completed, the position for adjusting the adjusting member can be exposed to the outside, thereby facilitating the adjustment and fixing of the adjusting member.

[0043] In some implementations, the rotating portion has a first arc surface and a second arc surface that are opposite to each other, so that the rotating portion is in an arc shape;

[0044] The base further includes a cover plate fixedly connected to the center beam; the cover plate has a third arc surface, and the center beam has a fourth arc surface opposite to the third arc surface, so that an arc groove is formed between the center beam and the cover plate;

[0045] The first arc surface matches the third arc surface, and the second arc surface matches the fourth arc surface, so that the rotating part is rotatably arranged in the arc groove.

[0046] By adopting the above-mentioned scheme, the arc-shaped rotating part is matched with the arc groove to realize the rotational connection between the first swing arm and the base in the form of a virtual axis. This is also conducive to setting the second abutment surface on the base, setting the first surface on the first swing arm, and facilitating the abutment between the first abutment surface and the second abutment surface.

[0047] In some implementations, the first abutting surface is a plane or a curved surface; the second abutting surface is a plane or a curved surface.

[0048] By adopting the above solution, the shapes of the first and second abutting surfaces can be determined according to actual design requirements. In addition, the first and second abutting surfaces are both flat, which not only facilitates the processing of the flat surfaces, but also makes it easier to achieve the preset flattening angle range using the adjustment member while ensuring adjustment accuracy.

[0049] A second aspect of the present application provides a design method for a rotating shaft mechanism, comprising:

[0050] An adjusting member is installed on a first swing arm rotatably connected to the base, and the adjusting member is rigidly connected to the first swing arm, wherein the adjusting member has a first abutting surface;

[0051] A second abutting surface is designed on the base to cooperate with the first abutting surface, so that when the first swing arm is in the deployed position, the first abutting surface abuts the second abutting surface, wherein when the first swing arm is in the deployed position, the angle formed between the first swing arm and the base is a flattening angle;

[0052] When the first swing arm is in the unfolded position, the adjusting member is moved in a first direction relative to the first swing arm so that the flattening angle is within a preset angle range;

[0053] After the flattening angle is within the preset angle range, the adjusting member is fixedly connected to the first swing arm.

[0054] By adopting the above scheme, when designing the first swing arm and the base, the accuracy of the processing technology can be appropriately reduced, and the first swing arm and the base can be designed to be over-expanded, that is, the flattening angle is greater than 180 degrees, so as to reduce the processing accuracy of both and reduce the error requirement during flattening; an adjusting member is installed on the first swing arm, and the adjusting member is rigidly connected to the first swing arm, so that the adjusting member is moved in the first direction of the first swing arm to adjust the flattening angle between the first swing arm and the base when the first swing arm is in the expanded position, and the flattening angle meets the preset angle requirement; when the flattening angle meets the preset angle requirement, due to the rigid connection between the first swing arm and the adjusting member, the stability of the first swing arm in the expanded position is guaranteed, so the first abutting surface and the second abutting surface are At the moment of abutment, the second abutment surface applies force to the first abutment surface, and the force can be directly transmitted to the first swing arm. Since the first swing arm and the base are still rotationally connected, it is not easy to generate jitter at the moment when the first abutment surface abuts the second abutment surface, which is beneficial to avoid the brief moment of over-expansion, thereby ensuring that the display screen on the electronic device will not be pulled or squeezed due to over-expansion, thereby ensuring the reliability of the electronic device; and after using the adjusting member to adjust the flattening angle to within the preset angle range, the adjusting member is fixedly connected to the first swing arm, so that during the use of the hinge mechanism, the adjusting member will not be displaced from the first swing arm, thereby ensuring that during the use of the hinge mechanism, the flattening angle is maintained within the preset angle range.

[0055] In some implementations, fixedly connecting the adjusting member to the first swing arm includes:

[0056] The adjusting member is fixed to the first swing arm by welding or gluing.

[0057] By adopting the above solution, the cost of fixing the adjusting member and the first swing arm can be reduced, and the fixing method is relatively convenient and easy to implement.

[0058] In a third aspect, the present application provides an electronic device comprising a first sub-shell, a second sub-shell, and a hinge mechanism according to any of the above embodiments, or a hinge mechanism designed using the design method of a hinge mechanism according to any of the above embodiments;

[0059] The first sub-shell and the second sub-shell are respectively connected to the rotating shaft mechanism, and the first sub-shell and the second sub-shell can rotate relative to each other through the rotating shaft mechanism.

[0060] By adopting the above scheme, when designing the first swing arm and the base, the accuracy of the processing technology can be appropriately reduced, and the first swing arm and the base can be designed to be over-expanded, that is, the flattening angle is greater than 180 degrees, so as to reduce the error requirement of the two when flattening; an adjusting member is installed on the first swing arm, and the adjusting member is rigidly connected to the first swing arm, so that the adjusting member is moved in the first direction of the first swing arm to adjust the flattening angle between the first swing arm and the base when the first swing arm is in the expanded position, and the flattening angle meets the preset angle requirement; when the flattening angle meets the preset angle requirement, due to the first swing arm and the base The rigid connection between the adjusting parts ensures the stability of the first swing arm in the expanded position. Therefore, at the moment when the first abutting surface abuts the second abutting surface, the second abutting surface applies force to the first abutting surface, and the force can be directly transmitted to the first swing arm. Since the first swing arm and the base are still rotationally connected, it is not easy to shake at the moment when the first abutting surface abuts the second abutting surface, which is conducive to avoiding the brief moment of over-extension, thereby ensuring that the display screen on the electronic device will not be pulled or squeezed due to over-extension, ensuring the reliability of the electronic device, and improving the yield of the electronic device or the hinge mechanism.

[0061] In some implementations, the electronic device further includes a flexible display screen, and the first sub-shell and the second sub-shell are respectively fixedly connected to the flexible display screen.

[0062] By adopting the above solution, the hinge mechanism with the adjusting member is applied to a foldable electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application in a folded state;

[0064] Figure 2 is a schematic structural diagram of an electronic device provided in an embodiment of the present application in a semi-expanded state;

[0065] Figure 3is a schematic structural diagram of an electronic device provided in an embodiment of the present application in an unfolded state;

[0066] Figure 4 1 is a schematic structural diagram of another electronic device provided in an embodiment of the present application in a semi-expanded state;

[0067] Figure 5 It is a schematic diagram of the local structure of the rotating shaft mechanism in the related art;

[0068] Figure 6 is a structural schematic diagram of the rotating shaft mechanism provided in an embodiment of the present application;

[0069] Figure 7 This is a structural diagram of the rotating shaft mechanism provided in an embodiment of the present application from another perspective;

[0070] Figure 8 This is a schematic diagram of the partial structure of the rotating shaft mechanism provided in an embodiment of the present application;

[0071] Figure 9 is a cross-sectional view of a partial structure of the rotating shaft mechanism in an embodiment of the present application;

[0072] Figure 10 is a cross-sectional view of another partial structure of the rotating shaft mechanism in an embodiment of the present application;

[0073] Figure 11 is a cross-sectional view of another partial structure of the rotating shaft mechanism in an embodiment of the present application;

[0074] Figure 12 This is a schematic structural diagram of the adjusting member in the embodiment of the present application;

[0075] Figure 13 2 is a schematic diagram of the partial structure of the first swing arm in the embodiment of the present application;

[0076] Figure 14 is another schematic diagram of the partial structure of the rotating shaft mechanism in an embodiment of the present application;

[0077] Figure 15 Schematic diagram of the structure of the first swing arm in the embodiment of the present application;

[0078] Figure 16 It is a structural schematic diagram of the first swing arm from another perspective in the embodiment of the present application.

[0079] The meanings of the figures are as follows:

[0080] 11. Swing arm structure; 12. Mounting seat;

[0081] 100, pivot mechanism; 101, base; 102, first swing arm; 103, connector; 104, first door panel; 105, connecting swing arm; 106, arc structure; 107, arc chute; 108, adjustment member; 109, first abutment surface; 110, second abutment surface; 111, center beam; 112, cover plate; 113, first reference surface; 114, second reference surface; 115, slide groove; 116, slide Moving wing; 117, first surface; 118, adjustment hole; 119, injection hole; 120, insertion portion; 121, abutment portion; 122, first hole portion; 123, second hole portion; 124, sliding portion; 125, rotating portion; 126, main structure; 127, second surface; 128, first arc surface; 129, second arc surface; 130, third arc surface; 131, fourth arc surface; 132, arc groove;

[0082] 200, display screen; 201, first part; 202, second part; 203, foldable part; 301, first sub-shell; 302, second sub-shell. DETAILED DESCRIPTION

[0083] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0084] It should be understood that the “multiple” mentioned in this application refers to two or more. In the description of this application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of this application, words such as “first” and “second” are used to distinguish between identical or similar items with basically the same functions and effects. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and execution order, and words such as “first” and “second” do not necessarily limit them to be different.

[0085] The following is a detailed explanation of the rotating shaft mechanism and its design method, and the electronic device provided in the embodiments of the present application.

[0086] See also Figures 1 to 3 , Figure 1 is a schematic structural diagram of an electronic device in a folded state provided by an embodiment of the present application, Figure 2 is a schematic structural diagram of an electronic device provided in an embodiment of the present application in a semi-expanded state, Figure 3 It is a structural schematic diagram of the electronic device provided in an embodiment of the present application in an unfolded state.

[0087] In one or more embodiments, the present application provides an electronic device, which may be a foldable electronic device. The electronic device includes a housing and a hinge mechanism 100. The housing includes a first sub-housing 301 and a second sub-housing 302. The first sub-housing 301 and the second sub-housing 302 are respectively connected to the hinge mechanism 100, and the first sub-housing 301 and the second sub-housing 302 can rotate relative to each other via the hinge mechanism 100. Exemplary electronic devices may include mobile phones, tablet computers, notebook computers, or e-readers. Foldable electronic devices are not limited to those with a foldable display 200, such as mobile phones. They may also include electronic devices with a display 200 that can be folded or unfolded between a keyboard and a keyboard, such as laptop computers. It is understood that the electronic device may also be an electronic device without a display 200. Alternatively, the electronic device may be an earphone charging case, with the hinge mechanism 100 providing a hinged connection between the body and lid of the headphone charging case. Furthermore, the hinge mechanism 100 may also be the hinge of a notebook computer.

[0088] In the embodiment of the present application, the electronic device is a mobile phone as an example, and the electronic device further includes a display screen 200, which can be a flexible display screen 200, and the display screen 200 is respectively connected to the first sub-shell 301 and the second sub-shell 302. The first sub-shell 301 and the second sub-shell 302 can include the middle frame of the mobile phone.

[0089] For ease of description, as shown in the figure, the width direction of the foldable electronic device can be defined as the BB direction, the length direction of the foldable electronic device can be defined as the AA direction, and the thickness direction of the foldable electronic device can be defined as the CC direction. The AA direction, the BB direction, and the CC direction are mutually perpendicular to each other to form a rectangular coordinate system. The axial direction of the hinge mechanism 100 is parallel to the AA direction.

[0090] Figure 1 The foldable electronic device is shown in a folded state. Figure 2 The foldable electronic device is shown in a semi-expanded state. Figure 3 The foldable electronic device is shown in an unfolded state. Figure 2 The unfolding angle α of the foldable electronic device shown is 90 degrees. Figure 3 The unfolding angle β of the foldable electronic device is shown to be 180 degrees. The state of the electronic device is the same as the state of the hinge mechanism 100. That is, when the foldable electronic device is folded, the hinge mechanism 100 is also folded; when the foldable electronic device is semi-expanded, the hinge mechanism 100 is also semi-expanded; and when the foldable electronic device is unfolded, the hinge mechanism 100 is also unfolded.

[0091] It should be noted that the angles described in the examples in this application are all allowed to have slight deviations. For example, Figure 2The unfolding angle α of the foldable electronic device shown is 90 degrees, which means that α can be 90 degrees or approximately 90 degrees, such as 80 degrees, 85 degrees, 95 degrees or 100 degrees. Figure 3 The unfolding angle β of the foldable electronic device shown is 180 degrees, which means that β can be 180 degrees or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees. The angles described below as examples can be understood in the same way.

[0092] Please combine Figure 1 and Figure 2 As shown, the first sub-shell 301 and the second sub-shell 302 are respectively mounted on either side of the hinge mechanism 100. The display screen 200 includes a first portion 201, a second portion 202, and a foldable portion 203. The foldable portion 203 is located between the first portion 201 and the second portion 202 and can be bent about an axis parallel to the AA direction. In this embodiment, the display screen 200 is a flexible display screen, such as an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MEL) display screen, a micro organic light-emitting diode (MEL) display screen, a quantum dot light-emitting diode (QLED) display screen, and the like.

[0093] The first sub-housing 301 and the second sub-housing 302 move relatively close together, driving the display 200 to fold, thereby folding the foldable electronic device. When the foldable electronic device is in the folded state, the foldable portion 203 of the display 200 bends, and the first portion 201 and the second portion 202 are positioned relative to each other. At this point, the display 200 is positioned between the first sub-housing 301 and the second sub-housing 302, significantly reducing the risk of damage to the display 200 and effectively protecting it.

[0094] Please also refer to Figure 2The first sub-housing 301 and the second sub-housing 302 rotate relative to each other via the hinge mechanism 100. As the first sub-housing 301 and the second sub-housing 302 move away from each other, the display screen 200 unfolds, allowing the foldable electronic device to unfold to a semi-expanded state. When the foldable electronic device is in the semi-expanded state, the first sub-housing 301 and the second sub-housing 302 unfold to an angle α, and the first portion 201 and the second portion 202 unfold relative to each other, driving the foldable portion 203 to unfold. At this point, the angle between the first portion 201 and the second portion 202 is α.

[0095] Please combine Figure 2 and Figure 3 As shown, the first sub-housing 301 and the second sub-housing 302 rotate relative to each other via the hinge mechanism 100. As the first sub-housing 301 and the second sub-housing 302 move away from each other, the display screen 200 further unfolds until the foldable electronic device is flattened. The hinge mechanism 100 may include a damping mechanism to provide a smooth opening and closing feel and maintain a stable state during rotation.

[0096] When the electronic device is flattened, the angle between the first sub-housing 301 and the second sub-housing 302 is β. The foldable portion 203 is unfolded, and the first portion 201 and the second portion 202 are relatively unfolded. At this point, the angles between the first portion 201, the second portion 202, and the foldable portion 203 are all β, and the display screen 200 has a large display area, enabling large-screen display for the foldable electronic device and improving the user experience.

[0097] It should be noted that angles α and β are both the angles between the first sub-case 301 and the second sub-case 302. These angles are used to distinguish the angles between the first sub-case 301 and the second sub-case 302 in different states of the foldable electronic device. Angle α refers to the angle between the first sub-case 301 and the second sub-case 302 when the foldable electronic device is in the semi-expanded state, while angle β refers to the angle between the first sub-case 301 and the second sub-case 302 when the foldable electronic device is in the expanded state.

[0098] In the examples of this application, see Figures 1 to 3 As shown, the mobile phone can be an inward folding screen mobile phone. After the inward folding screen mobile phone is folded, the display screen 200 is hidden, and the first sub-shell 301 and the second sub-shell 302 are exposed, so that the display screen 200 is protected by the first sub-shell 301 and the second sub-shell 302. Figure 4 This is a structural diagram of another electronic device provided in an embodiment of the present application in a semi-expanded state; see Figure 4 As shown, when the electronic device is a mobile phone, the mobile phone can also be an external folding screen mobile phone. After the external folding screen mobile phone is folded, the first sub-shell 301 and the second sub-shell 302 are opposite to each other, so that the display screen 200 is exposed.

[0099] Figure 5 This is a schematic diagram of the partial structure of the rotating shaft mechanism in the related art, see Figure 5 As shown, the swing arm structure 11 of the hinge mechanism is rotatably connected to the mounting base 12 of the hinge mechanism, and the swing arm structure 11 is in an extended state relative to the mounting base 12. When the swing arm structure 11 is extended relative to the mounting base 12, the portions of the flexible display screen fixedly connected to the middle frame are substantially aligned in the same plane. This state can be referred to as the flexible display screen being in a flattened state. However, due to the increasing thinness of the hinge mechanism and middle frame, and the precision limits of the manufacturing process, namely the limited machining accuracy of the swing arm structure 11 and the mounting base 12, the required tolerance band for the flattening angle cannot be guaranteed after the swing arm structure 11 and the mounting base 12 are mated. This results in a low yield rate for the electronic device or hinge mechanism, and a large flattening angle threshold, which affects the user experience.

[0100] In order to solve the problems in the related art, the embodiment of the present application further provides a hinge mechanism 100, as well as a design that improves user experience and optimizes the flattening angle.

[0101] Figure 6 1 is a schematic structural diagram of the rotating shaft mechanism 100 provided in an embodiment of the present application; Figure 7 1 is a structural diagram of the rotating shaft mechanism 100 provided in an embodiment of the present application from another perspective; in one or more embodiments, the rotating shaft mechanism 100 includes a base 101, a connecting member 103 and a first door panel 104; the first door panel 104 is rotatably connected to the base 101, and the first door panel 104 is also rotatably connected to the connecting member 103; illustratively, Figure 6 and Figure 7 The outer hinge mechanism 100 shown can be applied to an external folding screen mobile phone; there are two connectors 103 and two first door panels 104. The two connectors 103 are respectively arranged on opposite sides of the base 101, and the two first door panels 104 are respectively arranged on opposite sides of the base 101. The first door panels 104 are located between the base 101 and the connector 103. One connector 103 is used to be fixedly connected to the first sub-shell 301, and the other connector 103 is used to be fixedly connected to the second sub-shell 302. The first door panel 104 is used to support the foldable portion 203 of the display screen 200 when the electronic device is folded. It should be noted that the hinge mechanism 100 provided in the embodiment of the present application is not limited to application in external folding screen mobile phones, but can also be applied to internal folding screen mobile phones; in addition, it can also be applied to other possible scenarios, such as sliding doors with hinge accessories.

[0102] Figure 8 is a partial structural diagram of the rotating shaft mechanism 100 provided in the embodiment of the present application; Figure 8As shown, in some embodiments, the hinge mechanism 100 further includes a connecting swing arm 105, one end of which is rotatably connected to the base 101, and the other end of which is rotatably connected to the connecting member 103. The first door panel 104 is fixedly connected to the portion between the two ends of the connecting swing arm 105, so that the first door panel 104 can move as the connecting swing arm 105 rotates relative to the base 101. The connecting swing arm 105 has an arc-shaped structure 106 at each end, and the connecting member 103 and the base 101 are respectively provided with an arc-shaped sliding groove 107 that cooperates with the arc-shaped structure 106. The arc-shaped structure 106 is restrained in the arc-shaped sliding groove 107 to prevent it from escaping from the arc-shaped sliding groove 107. However, the arc-shaped structure 106 can rotate in the arc-shaped sliding groove 107 about an axis parallel to the AA direction.

[0103] Figure 9 is a cross-sectional view of a partial structure of the rotating shaft mechanism 100 in the embodiment of the present application; Figure 8 and Figure 9As shown, in some embodiments, the rotating shaft mechanism 100 further comprises a first swing arm 102 and an adjusting member 108; the first swing arm 102 is rotationally connected with the base 101, and the first swing arm 102 can rotate relative to the base 101 between an unfolded position and a folded position; when the first swing arm 102 is in the unfolded position, an angle between the first swing arm 102 and the base 101 is a flattening angle γ; the adjusting member 108 is rigidly connected with the first swing arm 102, the adjusting member 108 has a first abutting surface 109, the base 101 has a second abutting surface 110, and when the first swing arm 102 is in the unfolded position, the first abutting surface 109 abuts against the second abutting surface 110; wherein the adjusting member 108 is configured to be movable relative to the first swing arm 102 in a first direction to make the flattening angle within a preset angle range. Since the adjusting member 108 is used to adjust the flattening angle, when designing the first swing arm 102 and the base 101, the precision of the machining process can be moderately reduced, and the first swing arm 102 and the base 101 can be designed to be over-expanded, i.e., the flattening angle is greater than 180 degrees, to reduce the error requirement when they are flattened. After being designed to be over-expanded, the range of the flattening angle is greater than 180 degrees and not greater than 190 degrees, which facilitates the adjustment of the adjusting member 108. After being designed to be over-expanded, the specific value of the unfolding angle can be 184 degrees, 185 degrees, or 186 degrees, etc. Of course, after being over-expanded, the flattening angle can also be a range. The adjusting member 108 is installed on the first swing arm 102 and rigidly connected with the first swing arm 102, so that the adjusting member 108 is moved in the first direction of the first swing arm 102 to adjust the flattening angle between the first swing arm 102 and the base 101 when the first swing arm 102 is in the unfolded position, and to make the flattening angle meet the preset angle requirement. When the flattening angle meets the preset angle requirement, the rigidity between the first swing arm 102 and the adjusting member 108 ensures the stability of the first swing arm 102 in the unfolded position, so that the second abutting surface 110 exerts force on the first abutting surface 109 at the moment when the first abutting surface 109 abuts against the second abutting surface 110, and the force can be directly transmitted to the first swing arm 102. Since the first swing arm 102 is still rotationally connected with the base 101, it is not easy to produce shaking at the moment when the first abutting surface 109 abuts against the second abutting surface 110, which is conducive to avoiding the short moment of over-expansion, thereby preventing the display screen on the electronic device from being pulled or squeezed due to over-expansion, ensuring the reliability of the electronic device, and improving the yield of the electronic device or the rotating shaft mechanism 100. Illustratively, the base 101 comprises a middle beam 111 and a cover plate 112, and the cover plate 112 is fixedly connected with the middle beam 111. Illustratively, the cover plate 112 can be detachably fixedly connected with the middle beam 111 by screws. When the rotating shaft mechanism 100 is in the unfolded state, the first direction is parallel to the B-B direction.

[0104] It should be noted that over-extension means that the hinge mechanism 100 is excessively extended in the extension direction. If the electronic device is an inward-folding screen mobile phone, over-extension may cause the display screen 200 to be pulled; if the electronic device is an outward-folding screen mobile phone, over-extension may cause the display screen 200 to be squeezed. In some other possible cases, the adjustment member 108 may also be provided on the base 101, for example, on the center beam 111 or the cover plate 112.

[0105] In some embodiments, the position of the first swing arm 102 on the rotating shaft mechanism 100 is close to the axial end of the rotating shaft mechanism 100, which will facilitate the setting of the first abutment surface 109 on the first swing arm 102 and the second abutment surface 110 on the base 101, and facilitate the measurement of the flattening angle and the design of the adjustment member 108.

[0106] In some embodiments, for the convenience of measurement, the flattening angle γ is represented by the angle formed between the first reference surface 113 of the first swing arm 102 and the second reference surface 114 of the base 101; the first reference surface 113 and the second reference surface 114 can be planes; theoretically, when the first reference surface 113 and the second reference surface 114 are parallel, the flattening angle γ is 180 degrees; and when the angle formed between the first reference surface 113 and the second reference surface 114 meets the preset angle range, it is the flattening angle γ is within a preset angle range; the flattening angle γ satisfies the preset angle range: a≤γ≤b, where a is less than or equal to b, wherein 175 degrees ≤ a≤180 degrees, and 180 degrees ≤ b≤185 degrees. For example, a can be 175 degrees, 176 degrees, 177 degrees, 178 degrees, 179 degrees, or 180 degrees, and b can be 180 degrees, 181 degrees, 182 degrees, 183 degrees, 184 degrees, or 185 degrees. Of course, the two endpoints a and b of the preset angle range can also be determined based on actual design requirements. For example, the second reference surface 114 can be located on the cover plate 112. Of course, in some other possible cases, the second reference surface 114 can also be located on the center beam 111.

[0107] In some embodiments, the first swing arm 102 is also in sliding connection with the connecting piece 103, so that when the connecting piece 103 is moved, the first swing arm 102 slides with the connecting piece 103, and the connecting piece 103 simultaneously drives the first swing arm 102 to rotate relative to the base 101, and since the connecting swing arm 105 is in rotational connection with the connecting piece 103, the first door plate 104 will also move with the connecting piece 103. When the first swing arm 102 is in the unfolded position relative to the base 101, the electronic device is in the unfolded state; when the first swing arm 102 is in the folded position relative to the base 101, the electronic device is in the folded state. The first abutting surface 109 is arranged on the first swing arm 102 which is in rotational connection with the base 101 and in sliding connection with the connecting piece 103, so as to facilitate the adjustment of the unfolding angle and the design of the adjusting member 108 thereon.

[0108] In some embodiments, when the first swing arm 102 is in rigid connection with the adjusting member 108, the first swing arm 102 and the adjusting member 108 can be connected in a direct contact manner or in an indirect contact manner. When the first swing arm 102 is in rigid connection with the adjusting member 108, the stability of the connection between the two can be ensured.

[0109] In some embodiments, the connecting piece 103 has a sliding groove 115, and the first swing arm 102 has a sliding wing 116 which is arranged in the sliding groove 115 in a sliding manner and is limited in the sliding groove 115 by the sliding groove 115, so that the sliding wing 116 can only move along the guide direction of the sliding groove 115 and will not come out of the C-C direction.

[0110] Figure 10 is another sectional view of the hinge mechanism 100 in the embodiments of the present application; see Figure 9 and Figure 10 As shown in FIG. 1, the first swing arm 102 has a first surface 117 which is configured to be arranged opposite to the second abutting surface 110 when the first swing arm 102 is in the unfolded position; the first abutting surface 109 can protrude from the first surface 117; when the adjusting member 108 moves relative to the first swing arm 102 in the first direction when the first swing arm 102 is in the unfolded position, the distance between the first surface 117 and the first abutting surface 109 can change, so that the first abutting surface 109 protrudes from the first surface 117 to abut against the second abutting surface 110, and since the adjusting member 108 is in rigid connection with the first swing arm 102, when the adjusting member 108 moves relative to the first swing arm 102, the change of the distance between the first surface 117 and the first abutting surface 109 can realize the change of the distance between the first surface 117 and the second abutting surface 110, so as to adjust the unfolding angle to meet the preset angle range.

[0111] In some embodiments, the first abutting surface 109 is a plane or a curved surface; the second abutting surface 110 is a plane or a curved surface. In this way, the shapes of the first abutting surface 109 and the second abutting surface 110 can be determined according to actual design requirements. The curved surface can be in the form of an arc surface or a spherical cap. For example, see Figure 10 As shown, the first abutting surface 109 is a plane, and the second abutting surface 110 is a plane; the first surface 117 may also be a plane. The use of planes on both the first abutting surface 109 and the second abutting surface 110 facilitates machining of the planes, and also makes it easier to achieve the flattening angle within the preset range using the adjustment member 108 while ensuring adjustment accuracy.

[0112] It should be noted that, in some other possible embodiments, at least one of the first abutting surface 109 and the second abutting surface 110 may also be a curved surface; in addition, one of the first abutting surface 109 and the second abutting surface 110 may be in the form of a convex surface, and the other may be in the form of a concave surface that matches the concave surface, that is, the convex surface extends into the concave surface, which can increase the contact area and reduce stress.

[0113] Please continue to see Figure 9 and Figure 10 As shown, in some embodiments, the first swing arm 102 has an adjustment hole 118 extending along the first direction. The adjustment member 108 is a columnar structure, at least a portion of which is located within the adjustment hole 118. The first abutment surface 109 is an end surface of the columnar structure. Providing the adjustment hole 118 on the first swing arm 102 facilitates manufacturing and installation of the adjustment member 108. The columnar shape of the adjustment member 108 provides a strong supporting force, facilitating stability in achieving a flattening angle within a predetermined range. The opening of the adjustment hole 118 is located on the first surface 117. When the columnar structure is moved in the first direction, the length of the columnar structure extending beyond the first surface 117 can be adjusted, thereby allowing the first abutment surface 109 to extend beyond the first surface 117, thereby adjusting the flattening angle formed between the first swing arm 102 and the base 101 when the first swing arm 102 is in the deployed position. It should be noted that, in some cases, the first abutting surface 109 on the columnar structure may be flush with the first surface 117 , ie, the flattening angle satisfies the preset angle range.

[0114] Please continue to see Figure 9 and Figure 10As shown, the adjustment hole 118 has an internal thread, and the columnar structure has an external thread that matches the internal thread, thereby achieving a rigid connection between the adjustment member 108 and the first swing arm 102, and direct contact between the adjustment member 108 and the first swing arm 102. The columnar structure can be completely located in the adjustment hole 118; in addition, after the adjustment member 108 and the first swing arm 102 are threaded together, the flattening angle can be precisely adjusted, and the rigid connection between the adjustment member 108 and the first swing arm 102 can be ensured. Moreover, when the adjustment member 108 adjusts the flattening angle so that the flattening angle is within the preset angle range, when the two are fixed by welding or other means, it can also be ensured that the adjusted flattening angle is not easily changed. The pitch of the external and internal threads can be set as needed to achieve the adjustment accuracy of the flattening angle. This application does not specifically limit the pitch. For example, the adjustment hole 118 can be in the form of a through hole, and the other end surface of the columnar structure opposite to the adjustment hole 118 has a cross slot or a straight slot. This makes it easy to insert a screwdriver through the hole at the other end of the adjustment hole 118 to screw the columnar structure to adjust the length of the first abutting surface 109 of the columnar structure extending beyond the first surface 117. Of course, the other end surface of the columnar structure opposite to the adjustment hole 118 can also have another type of slot structure to facilitate screwing. The material of the adjustment member 108 can be the same as that of the base 101. For example, the adjustment member 108 and the base 101 are both made of a wear-resistant and hard metal material, such as stainless steel or titanium.

[0115] In some embodiments, the adjustment member 108 is further configured to be fixedly connected to the first swing arm 102 after the flattening angle is within a preset angle range. In this way, after the flattening angle is adjusted by the adjustment member 108 to be within the preset angle range, the adjustment member 108 is then fixedly connected to the first swing arm 102. In this way, during use of the hinge mechanism 100, the adjustment member 108 and the first swing arm 102 will not be displaced, thereby facilitating the flattening angle to be maintained within the preset angle range during use of the hinge mechanism 100. During assembly of the hinge mechanism 100, after the flattening angle is adjusted by the adjustment member 108 to be within the preset angle range, the adjustment member 108 is then fixedly connected to the first swing arm 102. This ensures that the flattening angle is not easily changed during daily use of the electronic device by the user, thereby ensuring the reliability of the electronic device.

[0116] Figure 11 This is a cross-sectional view of another partial structure of the rotating shaft mechanism 100 in the embodiment of the present application; Figure 9 、 Figure 10 and Figure 11As shown, in some embodiments, the first swing arm 102 further includes an injection hole 119, which is connected to the adjustment hole 118. The axial direction of the adjustment hole 118 forms an angle with the axial direction of the injection hole 119. The injection hole 119 is filled with a solid phase change material to securely connect the adjustment member 108 to the first swing arm 102. Filling the phase change material facilitates a secure connection between the adjustment member 108 and the first swing arm 102. Exemplarily, the axial direction of the injection hole 119 is perpendicular to the axial direction of the adjustment hole 118. This facilitates the flow of liquid phase change material through the injection hole 119 into the adjustment hole 118, thereby securing the connection between the adjustment member 108 and the first swing arm 102.

[0117] In some embodiments, the phase change material is a glue or a solder, which can reduce the cost of fixing the adjustment member 108 and the first swing arm 102, and the fixing method is relatively convenient and easy to implement. The glue can be glue, for example, the glue can be 101 glue or 502 glue, and 101 glue and 502 glue are both cyanoacrylate glues. When solder is used for welding, the solder is heated to melt it, so that it flows into the adjustment hole 118 through injection, and after cooling, the adjustment member 108 is fixedly connected to the first swing arm 102. The axis of the injection hole 119 and the axis of the adjustment hole 118 can be in the form of skew straight lines, so that when solder is used, the contact area between the solder and the adjustment member 108 can be increased, and the stability of the connection between the adjustment member 108 and the first swing arm 102 can be improved.

[0118] It should be noted that, in addition to using the injection hole 119 and the brazing material to achieve the welding fixation between the adjusting member 108 and the first swing arm 102, other methods can also be used to achieve the welding fixation between the adjusting member 108 and the first swing arm 102. Welding can ensure the stability and rigidity of the connection between the two, improve the stability of the overall structure formed by the adjusting member 108 and the first swing arm 102, and ensure that it is not easily deformed or loosened when subjected to external loads or impacts. In addition, due to the rigid connection, stress transfer between the adjusting member 108 and the first swing arm 102 is improved, allowing each component to better share the load, thereby extending the service life of the overall structure. Secondly, after adjusting the flattening angle using the adjusting member 108, the adjusting member 108 and the first swing arm 102 can be assembled together in one step by welding, without the need for additional connectors 103 or fasteners. This not only reduces production costs but also simplifies the assembly process and improves production efficiency. Furthermore, welding can ensure the relative position between the two, thereby ensuring precision. Finally, due to the strong welded connection, the connection between the adjustment member 108 and the first swing arm 102 is less susceptible to damage, thereby reducing the need for routine maintenance and repairs.

[0119] Figure 121 is a schematic structural diagram of the adjusting member 108 in an embodiment of the present application; Figure 13 This is a partial structural diagram of the first swing arm 102 in the embodiment of the present application. Figure 13 It is just to illustrate the structure of the adjustment hole 118 on the first swing arm 102; Figure 12 and Figure 13 As shown, in other embodiments, the columnar structure includes an inserting portion 120 and an abutting portion 121, and the inserting portion 120 is connected to the abutting portion 121; at least a portion of the inserting portion 120 is located in the adjustment hole 118, and the diameter of the abutting portion 121 is larger than the diameter of the inserting portion 120; the first abutting surface 109 is located on the abutting portion 121, so that the inserting portion 120 is inserted into the adjustment hole 118 to ensure the rigid connection between the adjusting member 108 and the first swing arm 102, and the diameter of the abutting portion 121 is larger than the diameter of the inserting portion 120, so that the first abutting surface 109 has a larger Contact area; when the first abutting surface 109 contacts the second abutting surface 110, it helps to disperse the load and enhance the stability and reliability of the structure; this can also improve the service life of the adjustment member 108, and even if the abutting portion 121 is worn during long-term use, it will not affect the accuracy of the flattening angle; in addition, due to the existence of the abutting portion 121, the first abutting surface 109 can have a larger and more appropriate area, which can reduce the generation of pits on the base 101 during the continuous contact between the first abutting surface 109 and the second abutting surface 110, thereby affecting the accuracy of the flattening angle. For example, combined with Figure 12 and Figure 13 As shown, the adjustment hole 118 includes a first hole portion 122 and a second hole portion 123 communicating with the first hole portion 122. An internal thread may be provided on the first hole portion 122. The diameter of the first hole portion 122 is smaller than the diameter of the second hole portion 123. The insertion portion 120 may be threadedly connected to the first hole portion 122, while the second hole portion 123 is a smooth hole. The thickness of the abutment portion 121 in the axial direction of the adjustment hole 118 may not be greater than the depth of the second hole portion 123, thus making the adjustment hole 118 a countersunk hole. The radial cross-section of the abutment portion 121 may be circular or polygonal, and the radial cross-section of the abutment portion 121 is perpendicular to the axial direction of the adjustment hole 118.

[0120] Figure 14 This is another schematic diagram of the partial structure of the rotating shaft mechanism 100 in the embodiment of the present application, wherein: Figure 14 The cover plate 112 is not shown, and only one first swing arm 102 is shown; Figure 15 is a schematic structural diagram of the first swing arm 102 in an embodiment of the present application, Figure 16 is a structural diagram of the first swing arm 102 from another perspective in the embodiment of the present application; Figure 14 、 Figure 15 and Figure 16As shown, the first swing arm 102 has a sliding portion 124 and a rotating portion 125, the sliding portion 124 is fixedly connected to the rotating portion 125, for example, the sliding portion 124 and the rotating portion 125 are an integral structure; the adjusting member 108 is mounted on the sliding portion 124, and the first surface 117 is provided on the sliding portion 124; the second abutting surface 110 is provided on the middle beam 111, and the rotating portion 125 is rotatably connected to the middle beam 111; the sliding portion 124 is slidably connected to the connecting member 103; the sliding wing 116 is located on the sliding portion 124, and the sliding portion 124 is limited in the sliding groove 115 by the sliding wing 116, and the sliding portion 124 can move along the guide direction of the sliding groove 115; the guide direction of the sliding groove 115 can be parallel to the first direction, or in other words, the guide direction of the sliding groove 115 is parallel to the length direction of the sliding groove 115. By providing the adjustment member 108 on the sliding portion 124 of the first swing arm 102 that is slidably connected to the base 101, it is facilitated to install and adjust the adjustment member 108. That is, after the rotating shaft mechanism 100 is assembled, the position for adjusting the adjustment member 108 can be exposed to the outside, thereby facilitating adjustment and fixing the adjustment member 108. Exemplarily, the sliding portion 124 includes a main structure 126 and sliding wings 116 located on opposite sides of the main structure 126. The adjustment hole 118 and the injection hole 119 are provided on the main structure 126. The main structure 126 has two opposite side surfaces in a first direction, one of which is a first surface 117 and the other is a second surface 127. Thus, the openings at both ends of the adjustment hole 118 are located on the first surface 117 and the second surface 127, respectively. When the adjustment member 108 is installed in the adjustment hole 118, the adjustment member 108 can be operated to move through the opening of the adjustment hole 118 located on the second surface 127.

[0121] Combine Figure 14 、 Figure 15 and Figure 16 As shown, the rotating portion 125 has a first arc surface 128 and a second arc surface 129 opposite to each other, so that the rotating portion 125 is in an arc shape. Figure 9 As shown, the cover plate 112 has a third arc surface 130, and the center beam 111 has a fourth arc surface 131 opposite to the third arc surface 130, so that an arc groove 132 is formed between the center beam 111 and the cover plate 112; the first arc surface 128 cooperates with the third arc surface 130, and the second arc surface 129 cooperates with the fourth arc surface 131, so that the rotating part 125 is rotatably set in the arc groove 132; in this way, the arc-shaped rotating part 125 cooperates with the arc groove 132 to realize the rotational connection between the first swing arm 102 and the base 101 in the form of a virtual axis, which is also conducive to setting the second abutting surface 110 on the base 101 and setting the first surface 117 on the first swing arm 102, and facilitating the abutment between the first abutting surface 109 and the second abutting surface 110.

[0122] In some embodiments, the first direction and the rotation axis of the first swing arm 102 relative to the base 101 form an angle; this facilitates simplifying the design of the adjustment member 108 for adjusting the flattening angle, facilitates adjusting the flattening angle, and improves adjustment accuracy. For example, the angle between the first direction and the rotation axis of the first swing arm 102 relative to the base 101 is a right angle; the first direction is also parallel to the length of the first swing arm 102, so that the adjustment member 108 can directly change the flattening angle when moving along the first direction, thereby facilitating control of the flattening angle accuracy to meet a preset angle range. It should be noted that the angle between the first direction and the rotation axis of the first swing arm 102 relative to the base 101 is a right angle, which can be exactly 90 degrees or approximately 90 degrees. Of course, the angle between the first direction and the rotation axis of the first swing arm 102 relative to the base 101 can also be other degrees, such as an acute angle.

[0123] In one or more embodiments, the present application further provides a design method for a hinge mechanism 100, which is applicable to the hinge mechanism 100 in any embodiment provided in the present application. The electronic device in the embodiments of the present application may also use the hinge mechanism 100 designed using the design method for the hinge mechanism 100.

[0124] The design method of the rotating shaft mechanism 100 in the embodiment of the present application includes:

[0125] An adjusting member 108 is mounted on the first swing arm 102 rotatably connected to the base 101 , and the adjusting member 108 is rigidly connected to the first swing arm 102 , wherein the adjusting member 108 has a first abutting surface 109 ;

[0126] A second abutting surface 110 is designed on the base 101 to cooperate with the first abutting surface 109, so that when the first swing arm 102 is in the deployed position, the first abutting surface 109 abuts against the second abutting surface 110. When the first swing arm 102 is in the deployed position, the angle formed between the first swing arm 102 and the base 101 is a flattening angle.

[0127] When the first swing arm 102 is in the unfolded position, the adjusting member 108 is moved in a first direction relative to the first swing arm 102 so that the flattening angle is within a preset angle range;

[0128] After the flattening angle is within the preset angle range, the adjusting member 108 is fixedly connected to the first swing arm 102 .

[0129] The design method of the rotating shaft mechanism 100 of the embodiment of the present application can appropriately reduce the accuracy of the processing technology when designing the first swing arm 102 and the base 101, and can design the first swing arm 102 and the base 101 to be over-spread, that is, the flattening angle is greater than 180 degrees, so as to reduce the error requirement of the two when flattening. After the design is over-spread, the range of the flattening angle is greater than 180 degrees and not greater than 190 degrees, which is convenient for the adjustment of the adjustment member 108. After the design is over-spread, the specific value of the spread angle can be 184 degrees, 185 degrees or 186 degrees, etc. Of course, after over-extension, the flattening angle can also be within a range; an adjusting member 108 is installed on the first swing arm 102, and the adjusting member 108 is rigidly connected to the first swing arm 102, so that the adjusting member 108 moves in the first direction of the first swing arm 102 to adjust the flattening angle between the first swing arm 102 and the base 101 when the first swing arm 102 is in the extended position, and the flattening angle meets the preset angle requirement; when the flattening angle meets the preset angle requirement, due to the first swing arm 10 2 is rigidly connected to the adjusting member 108, which ensures the stability of the first swing arm 102 in the expanded position. Therefore, at the moment when the first abutting surface 109 and the second abutting surface 110 abut against each other, the second abutting surface 110 applies force to the first abutting surface 109, and the force can be directly transmitted to the first swing arm 102. Since the first swing arm 102 and the base 101 are still rotationally connected, it is not easy to vibrate at the moment when the first abutting surface 109 and the second abutting surface 110 abut against each other, which is conducive to avoiding the temporary over-expansion. moment, thereby helping to ensure that the display screen on the electronic device will not be pulled or squeezed due to over-expansion, thereby ensuring the reliability of the electronic device; and after using the adjusting member 108 to adjust the flattening angle so that it is within the preset angle range, the adjusting member 108 is fixedly connected to the first swing arm 102, so that during the use of the hinge mechanism 100, the adjusting member 108 will not be displaced from the first swing arm 102, thereby helping to ensure that during the use of the hinge mechanism 100, the flattening angle is maintained within the preset angle range.

[0130] In some embodiments, the first swing arm 102 is a swing arm that rotates with the base 101 to be slidably connected to the connecting member 103 of the rotating shaft mechanism 100. This facilitates the installation of the adjusting member 108 and facilitates the adjustment of the flattening angle using the adjusting member 108. Exemplarily, the adjusting member 108 is installed on the first swing arm 102 that is rotatably connected to the base 101, and the adjusting member 108 is rigidly connected to the first swing arm 102, including: providing an adjusting hole 118 with an internal thread on the first swing arm 102, so that the adjusting member 108 is in the form of a screw, and the adjusting member 108 is threadedly engaged with the adjusting hole 118, so that the adjustment is achieved by screwing the adjusting member 108.

[0131] In some embodiments, fixing the adjusting member 108 to the first swing arm 102 includes welding or gluing the adjusting member 108 to the first swing arm 102. This reduces the cost of fixing the adjusting member 108 to the first swing arm 102, and the fixing method is relatively convenient and easy to implement. For example, the gluing method can be glue, such as 101 glue or 502 glue, both of which are cyanoacrylate glues.

[0132] In the description of the specification of this application, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hinge mechanism for a foldable electronic device with a flexible display screen, characterized in that: include: base; a first swing arm, the first swing arm being rotatably connected to the base, and the first swing arm being rotatable relative to the base between an unfolded position and a folded position; When the first swing arm is in the deployed position, the angle formed between the first swing arm and the base is a flattening angle; an adjusting member, the adjusting member being rigidly connected to the first swing arm, the adjusting member having a first abutting surface, and the base having a second abutting surface, wherein the first abutting surface abuts against the second abutting surface when the first swing arm is in the deployed position; The adjusting member is configured to be movable in a first direction relative to the first swing arm so that the flattening angle is within a preset angle range, and the adjusting member is further configured to be fixedly connected to the first swing arm after the flattening angle is within the preset angle range; The first swing arm has an adjustment hole extending along a first direction, the adjustment member is a columnar structure, and at least a portion of the columnar structure is located in the adjustment hole; The first abutting surface is an end surface of the columnar structure; The columnar structure includes an inserting portion and an abutting portion, wherein the inserting portion is connected to the abutting portion; At least a portion of the insertion portion is located in the adjustment hole, and a diameter of the abutment portion is larger than a diameter of the insertion portion; The first abutting surface is located on the abutting portion.

2. The rotating shaft mechanism according to claim 1, wherein: The first swing arm has a first surface, and the first surface is configured to be disposed opposite to the second abutment surface when the first swing arm is in the deployed position; The first abutting surface can be convex relative to the first surface; When the first swing arm is in the expanded position, the distance between the first surface and the first abutting surface can be changed during the process of moving the adjusting member in the first direction relative to the first swing arm.

3. The rotating shaft mechanism according to claim 1, wherein: An included angle is formed between the first direction and a rotation axis of the first swing arm relative to the base.

4. The rotating shaft mechanism according to claim 3, wherein: The angle between the first direction and the rotation axis of the first swing arm relative to the base is a right angle; the first direction is also parallel to the length direction of the first swing arm.

5. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that: The adjusting member is welded and fixed to the first swing arm.

6. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that: The adjusting hole has an internal thread, and the columnar structure has an external thread matching the internal thread.

7. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that: The first swing arm further has an injection hole, the injection hole is connected to the adjustment hole, and an angle is formed between the axial direction of the adjustment hole and the axial direction of the injection hole; The injection hole is filled with solid phase change material to fix the adjustment member to the first swing arm.

8. The rotating shaft mechanism according to claim 7, wherein: The phase change material is glue or solder.

9. The rotating shaft mechanism according to claim 2, wherein: The first swing arm has a sliding portion and a rotating portion, and the sliding portion is fixedly connected to the rotating portion; The adjusting member is mounted on the sliding portion, and the first surface is provided on the sliding portion; The base includes a center beam, the second abutting surface is provided on the center beam, and the rotating portion is rotatably connected to the center beam; The rotating shaft mechanism further includes a connecting member, and the sliding portion is slidably connected to the connecting member; Wherein, the connecting member has a sliding groove, the sliding portion is located in the sliding groove, and the sliding portion can move along the guiding direction of the sliding groove.

10. The rotating shaft mechanism according to claim 9, wherein: The rotating portion has a first arc surface and a second arc surface opposite to each other, so that the rotating portion is in an arc shape; The base further includes a cover plate, which is fixedly connected to the center beam; the cover plate has a third arc surface, and the center beam has a fourth arc surface opposite to the third arc surface, so that an arc groove is formed between the center beam and the cover plate; The first arc surface cooperates with the third arc surface, and the second arc surface cooperates with the fourth arc surface, so that the rotating part is rotatably disposed in the arc groove.

11. The rotating shaft mechanism according to any one of claims 1 to 4, characterized in that: The first abutting surface is a plane or a curved surface; the second abutting surface is a plane or a curved surface.

12. A method for designing a hinge mechanism for a foldable electronic device with a flexible display screen, characterized in that: The design approach includes: An adjusting member is installed on a first swing arm rotatably connected to the base, and the adjusting member is rigidly connected to the first swing arm, wherein the adjusting member has a first abutting surface; A second abutting surface is designed on the base to cooperate with the first abutting surface, so that when the first swing arm is in the deployed position, the first abutting surface abuts against the second abutting surface, wherein when the first swing arm is in the deployed position, the angle formed between the first swing arm and the base is a flattening angle; When the first swing arm is in the expanded position, the adjusting member is moved in a first direction relative to the first swing arm so that the flattening angle is within a preset angle range; After the flattening angle is within the preset angle range, the adjusting member is fixedly connected to the first swing arm, wherein the first swing arm has an adjusting hole extending along the first direction, the adjusting member is a columnar structure, at least part of the structure of the columnar structure is located in the adjusting hole, the first abutting surface is an end face of the columnar structure, the columnar structure includes an inserting portion and an abutting portion, the inserting portion is connected to the abutting portion, at least part of the inserting portion is located in the adjusting hole, the diameter of the abutting portion is larger than the diameter of the inserting portion, and the first abutting surface is located on the abutting portion.

13. The design method of the rotating shaft mechanism according to claim 12, wherein: The method of fixedly connecting the adjusting member to the first swing arm includes: The adjusting member is fixed to the first swing arm by welding or gluing.

14. An electronic device, characterized in that: comprising a first sub-shell, a second sub-shell, and the hinge mechanism according to any one of claims 1 to 11, or a hinge mechanism designed using the design method of the hinge mechanism according to claim 12 or 13; The first sub-shell and the second sub-shell are respectively connected to the rotating shaft mechanism, and the first sub-shell and the second sub-shell can rotate relative to each other through the rotating shaft mechanism.

15. The electronic device according to claim 14, wherein: The electronic device further includes a flexible display screen, and the first sub-shell and the second sub-shell are respectively fixedly connected to the flexible display screen.

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