Rotating shaft mechanism, design method thereof and electronic equipment

Abstract

The invention discloses a rotating shaft mechanism, a design method thereof and electronic equipment, and belongs to the technical field of electronic equipment. The rotating shaft mechanism comprises a base, a first swing arm and a supporting block; the first swing arm is rotationally connected with the base, and the first swing arm can rotate between an unfolding position and a folding position relative to the base; when the first swing arm is located at the unfolding position, an angle formed between the first swing arm and the base is a flattening angle; the supporting block is located on the base and rigidly connected with the base, the first swing arm is provided with a first contact surface, the supporting block is provided with a second contact surface, and when the first swing arm is located at the unfolding position, the first contact surface abuts against the second contact surface; the position of the second contact surface on the base can be changed, so that the flattening angle is within a preset angle range. The electronic equipment comprises a first sub-shell, a second sub-shell and a rotating shaft mechanism. The reliability of the electronic equipment is guaranteed, and the yield of the electronic equipment or the rotating shaft mechanism is improved.

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 popularity of electronic devices such as mobile phones and tablets in daily life, people's demand for convenience and portability is growing. In this context, foldable electronic devices have emerged, which not only meet the requirements of portability, but also bring users a large-screen visual experience through flexible display technology.

[0003] A foldable electronic device consists of two middle frames and a hinge mechanism, and the two middle frames are connected to each other through the hinge mechanism. At the same time, the flexible display is fixed to the two middle frames. This design allows the electronic device to switch freely between the folded and unfolded states. In the unfolded state, the part of the flexible display that is fixed to the middle frame needs to remain on a plane to ensure the best user experience.

[0004] In order to ensure that the electronic device is in a flattened state, the flexible display screen parts fixedly connected to the two middle frames are kept on the same plane, and the flattening angle formed between the shaft seat of the hinge mechanism and the rotating part can be satisfied by making it meet 180°; however, due to the increasingly thin thickness of the hinge mechanism and the middle frame, and the precision limit of the processing technology, the current technology makes it difficult to meet the requirements of the tolerance band for the flattening angle of the flexible display screen in a flattened state; this leads to a low yield of the electronic device or the hinge mechanism. Summary of the invention

[0005] The present application provides a hinge mechanism and a design method thereof, and an electronic device to solve the problem that it is difficult for current technology to meet the tolerance band requirements for the flattening angle of a flexible display screen in a flat state, thereby resulting in a low yield of the electronic device or the hinge mechanism.

[0006] The technical solution is as follows:

[0007] A first aspect of the present application provides a rotating shaft mechanism, which includes: a base, a first swing arm and a support block;

[0008] The first swing arm is rotatably connected to the base, and the first swing arm can rotate between an unfolded position and a folded position relative to the base; 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;

[0009] The support block is located on the base, the support block is rigidly connected to the base, the first swing arm has a first contact surface, the support block has a second contact surface, and when the first swing arm is in the unfolded position, the first contact surface abuts against the second contact surface;

[0010] The second contact surface is configured to be capable of changing its position on the base so that the flattening angle is within a preset angle range.

[0011] By adopting the above scheme, when designing the first swing arm and the base, the processing accuracy of the first swing arm and the base 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°, reducing the processing accuracy of the two, so as to reduce the error requirements for the matching of the two when flattened. A support block is installed on the base, and the support block and the base are rigidly connected. In this way, when the position of the second contact surface of the support block on the base is changed, the flattening angle between the first swing arm and the base when the first swing arm is in the expanded position can be easily adjusted, and the flattening angle meets the preset angle requirements. In other words, the present application can adjust the flattening angle between the first swing arm and the base through the support block while appropriately reducing the processing accuracy of the first swing arm and the base. When the flattening angle meets the preset angle requirement, due to the rigid connection between the base and the support block, the stability of the first swing arm in the unfolded position is guaranteed. Therefore, at the moment when the first contact surface abuts the second contact surface, the second contact surface applies force to the first contact 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, the first swing arm is not prone to shaking at the moment when the first contact surface abuts the second contact surface, which is conducive to avoiding a 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 improving the yield of the electronic device or the hinge mechanism.

[0012] In some implementations, when the first swing arm is in the deployed position, the second contact surface is configured to be movable in the direction of the first contact surface to adjust the flattening angle.

[0013] By adopting the above scheme, since the first swing arm is rotatably connected to the base, and when the first swing arm is in the unfolded position, the first contact surface abuts against the second contact surface, the position of the second contact surface is changed so that it moves in the direction of the first contact surface, which causes the first swing arm to rotate a certain angle, thereby changing the flattening angle, which is conducive to making the flattening angle within a preset angle range.

[0014] In some implementations, the base includes a middle beam having an embedding groove, and the support block is installed in the embedding groove.

[0015] By adopting the above solution, since the middle beam has a certain length, thickness and width, it is convenient to set an embedding groove for burying the support block thereon, so that after the support block is installed, the support block will not affect the original performance of the base, and the embedding groove can also better limit the support block and facilitate the rigid fixed connection between the support block and the middle beam.

[0016] In some implementations, the rotating shaft mechanism further includes a driving member, which is used to drive the supporting block to move so as to change the position of the second contact surface on the base.

[0017] By adopting the above solution, the use of a driving member is conducive to achieving precise adjustment of the movement of the support block, thereby improving the accuracy of adjusting the flattening angle.

[0018] In some implementations, the center beam has a first hole portion, the support block has a second hole portion, and the first hole portion and the second hole portion can be assembled to form a tapered hole;

[0019] The driving member comprises a cone structure, the cone structure has a cone external thread, and the cone hole has a cone internal thread matching the cone external thread;

[0020] When the first swing arm is in the extended position, the cone structure is configured to enable the support block to move during the process of gradually rotating into the cone hole, so as to drive the second contact surface to move in the direction of the first contact surface.

[0021] By adopting the above scheme, the support block can be easily moved by utilizing the cooperation of the conical internal thread in the conical hole and the conical external thread on the conical structure, so that the second contact surface moves in the direction of the first contact surface, thereby facilitating improving the accuracy of adjusting the flattening angle.

[0022] In some implementations, the support block includes a support body and guide wings disposed on two opposite sides of the support body, and the guide wings are fixedly connected to the support body;

[0023] Two opposite groove walls of the embedding groove are provided with guide grooves, and the guide wings are slidably limited in the guide grooves.

[0024] By adopting the above-mentioned scheme, by using the cooperation of the guide wings and the guide grooves, it is possible to ensure that the support block moves in the preset direction, that is, the support block moves in the direction where the first contact surface is located, thereby facilitating the precise adjustment of the moving distance of the support block relative to the base, so that the flattening angle can be adjusted more precisely to meet the preset angle range.

[0025] In some implementations, the first swing arm includes a sliding portion and a rotating portion, and the sliding portion is fixedly connected to the rotating portion;

[0026] The rotating part is rotatably connected to the middle beam;

[0027] The rotating shaft mechanism also includes a connecting member, and the sliding part is slidably connected to the connecting member, wherein the connecting member has a sliding groove, the sliding part is limited in the sliding groove, and the sliding part can move along the guiding direction of the sliding groove.

[0028] By adopting the above solution, the first contact surface is arranged on the first swing arm sliding with the base, so that after the shaft mechanism is assembled, the position for adjusting the support block can be exposed to the outside, thereby facilitating the adjustment and fixing of the support block.

[0029] In some implementations, 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 first arc surface is a concave surface, and the second arc surface is a convex surface;

[0030] The first swing arm further includes an abutment portion and a connecting beam, the sliding portion and the rotating portion are fixedly connected via the connecting beam, and the abutment portion is fixedly connected to the connecting beam;

[0031] The first contact surface is disposed on the abutting portion, the first contact surface is far away from the first arc surface, and the first contact surface is close to the second arc surface.

[0032] By adopting the above scheme, the first contact surface is set on the abutting portion, which is beneficial for the first contact surface to have an appropriate area, so as to reduce stress when the first contact surface abuts against the second contact surface, thereby ensuring that the first contact surface or the second contact surface is not easily worn or dented during long-term use, thereby ensuring that the flattening angle can meet the preset angle range during long-term use.

[0033] In some implementations, the base further includes a cover plate, which is fixedly connected to the middle beam; the cover plate has a third arc surface, and the middle beam has a fourth arc surface opposite to the third arc surface, so that an arc groove is formed between the middle beam and the cover plate;

[0034] The first arc surface matches with the third arc surface, and the second arc surface matches with the fourth arc surface, so that the rotating part is rotatably arranged in the arc groove.

[0035] By adopting the above scheme, the arc-shaped rotating part is matched with the arc groove to achieve a 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 contact surface on the base, setting the first contact surface on the first swing arm, and facilitating the abutment between the first contact surface and the second contact surface.

[0036] In some implementations, the center beam has a first side surface and a second side surface that are opposite to each other, the embedding groove is disposed on the first side surface, and the cover plate is fixed to the second side surface.

[0037] By adopting the above solution, the embedding groove is arranged on the first side surface, which does not affect the connection between the cover plate and the center beam, and facilitates the installation and fixation of the support block, and facilitates the use of the support block to adjust the flattening angle.

[0038] In some implementations, there are multiple support blocks, and the thicknesses of the multiple support blocks are arranged in an arithmetic progression.

[0039] By adopting the above scheme, after setting a plurality of support blocks of different thicknesses, the plurality of support blocks can be installed one by one on the base to debug the flattening angle, that is, when a support block is installed on the base, the flattening angle is measured, and when the preset angle range is not satisfied, another support block can be replaced on the base. In this way, since only one support block is located on the base for each debugging, the flattening angle can be conveniently adjusted; and since the thickness of each support block is different, after the support block is installed on the base, the position of the second contact surface on the base changes. For example, when the first swing arm is in the deployed position, support blocks of different thicknesses are replaced, so that the second contact surface can be moved in the direction of the first contact surface.

[0040] In some implementations, when the flattening angle is within a preset angle range, the support block is fixedly connected to the base, and the second contact surface remains relatively fixed to the base.

[0041] By adopting the above solution, when the flattening angle meets the preset angle range, the support block is fixed to the base, so that the flattening angle is not easily changed during use.

[0042] In some implementations, the support block is fixed to the base by welding.

[0043] By adopting the above scheme, after adjusting the flattening angle by using the support block, the support block and the base are fixed by welding, and then the rigid connection between the two is achieved, which improves the stability of the overall structure formed by the support block and the base, and ensures that it is not easy to deform or loosen when subjected to external loads or impacts. In addition, since it is still a rigid connection, a better stress transfer is formed between the support block and the base, so that each component can better share the load, thereby extending the service life of the overall structure. Secondly, after adjusting the flattening angle by using the support block, the support block and the base can be assembled together in one step by welding, without the need for additional connectors or fasteners, which can not only reduce production costs, but also simplify the assembly process and improve production efficiency. Furthermore, the relative position between the two can be ensured by welding, thereby ensuring accuracy. Finally, due to the strong connection of welding, the connection between the support block and the base is not easy to be damaged, thereby reducing the need for daily maintenance and repair.

[0044] In some implementations, the first contact surface is a plane or a curved surface; the second contact surface is a plane or a curved surface.

[0045] By adopting the above solution, the shapes of the first contact surface and the second contact surface can be determined according to actual design requirements. In addition, the first contact surface and the second contact surface are both plane, which is convenient for processing the plane on the one hand, and can easily achieve the preset angle range of the flattening angle by using the support block on the other hand, and ensure the adjustment accuracy.

[0046] A second aspect of the present application provides a design method for a rotating shaft mechanism, the design method comprising:

[0047] A first contact surface and a second contact surface are respectively designed on the first swing arm and the support block;

[0048] The first swing arm is rotatably connected to the base, and the support block is installed on the base, and the support block is rigidly connected to the base;

[0049] When the first swing arm is in the unfolded position, the first contact surface and the second contact surface are in contact with each other, and the angle formed by the first swing arm and the base is the flattening angle;

[0050] Changing the position of the second contact surface on the base so that the flattening angle is within a preset angle range;

[0051] After the flattening angle is within a preset angle range, the support block is fixedly connected to the base.

[0052] By adopting the above scheme, when designing the first swing arm and the base, the processing accuracy of the first swing arm and the base 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°, reducing the processing accuracy of the two, so as to reduce the error requirements for the matching of the two when flattened. A support block is installed on the base, and the support block and the base are rigidly connected. In this way, when the position of the second contact surface of the support block on the base is changed, the flattening angle between the first swing arm and the base when the first swing arm is in the expanded position can be easily adjusted, and the flattening angle meets the preset angle requirements. In other words, the present application can adjust the flattening angle between the first swing arm and the base through the support block while appropriately reducing the processing accuracy of the first swing arm and the base. When the flattening angle meets the preset angle requirement, due to the rigid connection between the base and the support block, the stability of the first swing arm in the unfolded position is guaranteed. Therefore, at the moment when the first contact surface abuts the second contact surface, the second contact surface applies force to the first contact 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, the first swing arm is not prone to shaking at the moment when the first contact surface abuts the second contact surface, which is conducive to avoiding a 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 improving the yield of the electronic device or the hinge mechanism.

[0053] In some implementations, the support block is fixedly connected to the base, including:

[0054] The support block is welded to the base.

[0055] By adopting the above solution, the cost of fixing the support block and the base can be reduced, and the fixing method is relatively convenient and easy to implement.

[0056] A third aspect of the present application provides an electronic device, comprising a first sub-shell, a second sub-shell, and any one of the above-mentioned hinge mechanisms, or a hinge mechanism designed using any one of the above-mentioned hinge mechanism design methods;

[0057] 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.

[0058] By adopting the above scheme, when designing the first swing arm and the base, the processing accuracy of the first swing arm and the base 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°, reducing the processing accuracy of the two, so as to reduce the error requirements for the matching of the two when flattened. A support block is installed on the base, and the support block and the base are rigidly connected. In this way, when the position of the second contact surface of the support block on the base is changed, the flattening angle between the first swing arm and the base when the first swing arm is in the expanded position can be easily adjusted, and the flattening angle meets the preset angle requirements. In other words, the present application can adjust the flattening angle between the first swing arm and the base through the support block while appropriately reducing the processing accuracy of the first swing arm and the base. When the flattening angle meets the preset angle requirement, due to the rigid connection between the base and the support block, the stability of the first swing arm in the unfolded position is guaranteed. Therefore, at the moment when the first contact surface abuts the second contact surface, the second contact surface applies force to the first contact 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, the first swing arm is not prone to shaking at the moment when the first contact surface abuts the second contact surface, which is conducive to avoiding a 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 improving the yield of the electronic device or the hinge mechanism.

[0059] 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.

[0060] By adopting the above solution, it is achieved that the rotating shaft mechanism with the supporting block is applied to a foldable electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application in a folded state;

[0062] Figure 2is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application in a semi-expanded state;

[0063] Figure 3 is a schematic structural diagram of an electronic device provided in an embodiment of the present application in an unfolded state;

[0064] Figure 4 is a schematic structural diagram of another electronic device in a semi-expanded state provided by an embodiment of the present application;

[0065] Figure 5 It is a partial structural schematic diagram of a rotating shaft mechanism in the related art;

[0066] Figure 6 is a schematic structural diagram of a rotating shaft mechanism 100 provided in an embodiment of the present application;

[0067] Figure 7 is a structural schematic diagram of the rotating shaft mechanism 100 provided in an embodiment of the present application from another perspective;

[0068] Figure 8 It is a partial structural schematic diagram of the rotating shaft mechanism provided in the embodiment of the present application;

[0069] Fig. 9 is a cross-sectional view of a partial structure of a rotating shaft mechanism in an embodiment of the present application;

[0070] Fig.10 is another schematic diagram of a partial structure of the rotating shaft mechanism provided in an embodiment of the present application;

[0071] Fig.11 is another schematic diagram of a partial structure of a rotating shaft mechanism provided in an embodiment of the present application;

[0072] Fig.12 yes Fig.11 A partial enlarged schematic diagram of point D in the middle;

[0073] Fig.13 is a schematic diagram of the structure of the support block in an embodiment of the present application;

[0074] Fig.14 is a schematic diagram of a cone structure in an embodiment of the present application;

[0075] Fig.15 is a schematic diagram of a partial structure of another form of a rotating shaft mechanism provided in an embodiment of the present application;

[0076] Fig.16 is a cross-sectional view of a partial structure of another form of a rotating shaft mechanism in an embodiment of the present application;

[0077] Fig.17 is another schematic diagram of a partial structure of another form of a rotating shaft mechanism provided in an embodiment of the present application;

[0078] Fig.18 yes Fig.17 A partial enlarged schematic diagram of point E in the middle;

[0079] Fig.19 It is a schematic diagram of the partial structure of the support block and the base in the embodiment of the present application;

[0080] Fig. 20 It is a schematic diagram of the local structure when the shaft mechanism in the embodiment of the present application is not installed with a cover plate;

[0081] Fig.21 is a schematic structural diagram of the first swing arm in an embodiment of the present application;

[0082] Fig. 22 is a structural schematic diagram of the first swing arm in another perspective of the embodiment of the present application;

[0083] Fig.23 It is a schematic diagram of contact point analysis on the base without and with the support block installed in the embodiment of the present application.

[0084] The meanings of the figures are as follows:

[0085] 11. Rotating part; 12. Shaft seat;

[0086] 100, shaft mechanism; 101, base; 102, first swing arm; 103, connecting piece; 104, first door panel; 105, support block; 106, first contact surface; 107, second contact surface; 108, first reference surface; 109, second reference surface; 110, middle beam; 111, cover plate; 112, first side surface; 113, second side surface; 114, embedding groove; 115, supporting body; 116, guide wing; 117, guide groove; 118, first hole portion; 119, second hole portion; 120, cone structure; 121 , tapered hole; 122, first slot wall; 123, second slot wall; 124, opening; 125, vertical portion; 126, transverse portion; 127, second swing arm; 128, rotating sub-arm; 129, first slide groove; 130, sliding portion; 131, rotating portion; 132, main structure; 133, sliding wing; 134, first arc surface; 135, second arc surface; 136, third arc surface; 137, fourth arc surface; 138, arc groove; 139, sliding groove; 140, screwing groove; 141, abutment portion; 142, connecting beam;

[0087] 200, display screen; 201, first part; 202, second part; 203, foldable part; 301, first sub-shell; 302, second sub-shell. DETAILED DESCRIPTION

[0088] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0089] 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 only 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, the words "first" and "second" are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not limit them to be different.

[0090] The rotating shaft mechanism and its design method, and the electronic device provided in the embodiments of the present application are explained in detail below.

[0091] See also Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of an electronic device in a folded state provided by an embodiment of the present application, Figure 2 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application in a semi-expanded state, Figure 3 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application in an unfolded state.

[0092] 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-shell 301 and a second sub-shell 302, the first sub-shell 301 and the second sub-shell 302 are respectively connected to the hinge mechanism 100, and the first sub-shell 301 and the second sub-shell 302 can rotate relative to each other through the hinge mechanism 100. Exemplary electronic devices may be mobile phones, tablet computers, notebooks, or e-readers. Foldable electronic devices are not limited to electronic devices with foldable display screens 200, such as mobile phones, but may also be electronic devices that can be folded or unfolded between the display screen 200 and the keyboard, such as laptop computers. It is understandable that the electronic device may also be an electronic device without a display screen 200. In addition, the electronic device may also be an earphone charging box, and the hinge mechanism 100 realizes the hinge between the box body and the box cover of the earphone charging box; further, the hinge mechanism 100 may also be the hinge of a notebook.

[0093] 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.

[0094] 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 rotating shaft mechanism 100 is parallel to the AA direction.

[0095] 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°. Figure 3 The unfolding angle β of the foldable electronic device is 180°. 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 in the folded state, the hinge mechanism 100 is also in the folded state; when the foldable electronic device is in the semi-expanded state, the hinge mechanism 100 is also in the semi-expanded state; when the foldable electronic device is in the unfolded state, the hinge mechanism 100 is also in the unfolded state.

[0096] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have slight deviations. Figure 2 The unfolding angle α of the foldable electronic device shown is 90°, which means that α can be 90°, or approximately 90°, such as 80°, 85°, 95° or 100°. Figure 3 The unfolding angle β of the foldable electronic device shown is 180°, which means that β can be 180°, or approximately 180°, such as 170°, 175°, 185°, and 190°, etc. The angles described below can be understood in the same way.

[0097] Please combine Figure 1 and Figure 2As shown, the first sub-shell 301 and the second sub-shell 302 are respectively installed on both sides of the hinge mechanism 100, and the display screen 200 includes a first part 201, a second part 202 and a foldable part 203. The foldable part 203 is located between the first part 201 and the second part 202, and the foldable part 203 can be bent around an axis parallel to the AA direction. In this embodiment, the display screen 200 adopts a flexible display screen, for example, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (miniorganic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display screen, etc.

[0098] The first sub-shell 301 and the second sub-shell 302 are relatively close to each other to drive the display screen 200 to fold, so that the foldable electronic device can be folded. When the foldable electronic device is in the folded state, the foldable portion 203 of the display screen 200 is bent, and the first portion 201 and the second portion 202 are arranged opposite to each other. At this time, the display screen 200 is between the first sub-shell 301 and the second sub-shell 302, which can greatly reduce the probability of the display screen 200 being damaged, thereby achieving effective protection of the display screen 200.

[0099] Please also read Figure 2 , the first sub-shell 301 and the second sub-shell 302 rotate relative to each other through the hinge mechanism 100, and the first sub-shell 301 and the second sub-shell 302 move away from each other to drive the display screen 200 to unfold, so that the foldable electronic device is unfolded to a semi-expanded state. When the foldable electronic device is in the semi-expanded state, the first sub-shell 301 and the second sub-shell 302 unfold to an angle of α, the first part 201 and the second part 202 unfold relative to each other, and drive the foldable part 203 to unfold. At this time, the angle between the first part 201 and the second part 202 is α.

[0100] Please combine Figure 2 and Figure 3 As shown, the first sub-shell 301 and the second sub-shell 302 rotate relative to each other through the hinge mechanism 100, and the first sub-shell 301 and the second sub-shell 302 move away from each other to drive the display screen 200 to further unfold until the foldable electronic device is flattened. The hinge mechanism 100 can have a damping mechanism to achieve the opening and closing feel and state maintenance during the rotation process.

[0101] When the electronic device is in a flattened state, the angle between the first sub-shell 301 and the second sub-shell 302 is β. The foldable portion 203 is unfolded, and the first portion 201 and the second portion 202 are relatively unfolded. At this time, 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, realizing a large-screen display of the foldable electronic device, and improving the user experience.

[0102] It should be noted that the angle α and the angle β are both the angles between the first sub-shell 301 and the second sub-shell 302, which are only used to distinguish the different angles between the first sub-shell 301 and the second sub-shell 302 in different states of the foldable electronic device. The angle α refers to the angle between the first sub-shell 301 and the second sub-shell 302 when the foldable electronic device is in a semi-expanded state; the angle β refers to the angle between the first sub-shell 301 and the second sub-shell 302 when the foldable electronic device is in an expanded state.

[0103] 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 is a structural schematic diagram of another electronic device in a semi-expanded state provided by an embodiment of the present application; 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 subshell 301 and the second subshell 302 are opposite to each other, so that the display screen 200 is exposed.

[0104] Figure 5 It is a partial structural diagram of the rotating shaft mechanism in the related art, see Figure 5 As shown, the rotating member 11 of the rotating shaft mechanism is rotatably connected with the shaft seat 12 of the rotating shaft mechanism, and the rotating member 11 is in an unfolded state relative to the shaft seat 12; and when the rotating member 11 is in an unfolded state relative to the shaft seat 12, the parts of the flexible display screen that are respectively fixedly connected to the middle frame can be basically in the same plane, and this state can be said to be the flexible display screen in a flattened state. However, since the rotating shaft mechanism and the middle frame are becoming thinner and thinner, and there is a precision limit in the processing technology, that is, the processing precision of the rotating member 11 and the shaft seat 12 is limited, after the rotating member 11 and the shaft seat 12 are matched, the tolerance band requirements of the flattening angle in the flattened state cannot be guaranteed, resulting in a low yield of the electronic device or the rotating shaft mechanism, and a large flattening angle threshold, which affects the user experience.

[0105] 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.

[0106] Figure 6 is a structural schematic diagram of a rotating shaft mechanism 100 provided in an embodiment of the present application; Figure 7 1 is a structural schematic diagram of another perspective of the rotating shaft mechanism 100 provided in an embodiment of the present application; 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 outer folding screen mobile phone; the number of the connecting members 103 is two, the number of the first door panels 104 is two, the two connecting members 103 are respectively arranged on the opposite sides of the base 101, and the two first door panels 104 are respectively arranged on the opposite sides of the base 101, the first door panels 104 are located between the base 101 and the connecting member 103, one of the connecting members 103 is used to be fixedly connected to the first sub-shell 301, and the other connecting member 103 is used to be fixedly connected to the second sub-shell 302. The first door panel 104 is used to support the foldable part 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 the application in the outer folding screen mobile phone, but can also be applied in the inner folding screen mobile phone; in addition, it can also be applied to other possible scenarios, such as a sliding door with a hinge accessory.

[0107] Figure 8 is a partial structural diagram of the rotating shaft mechanism 100 provided in an embodiment of the present application, Fig. 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 Fig. 9As shown, in some embodiments, the hinge mechanism 100 also includes a first swing arm 102 and a support block 105; the first swing arm 102 is rotatably connected to the base 101, and the first swing arm 102 can rotate between an unfolded position and a folded position relative to the base 101; when the first swing arm 102 is in the unfolded position, the angle formed between the first swing arm 102 and the base 101 is the flattening angle; the support block 105 is located on the base 101, and the support block 105 is rigidly connected to the base 101, the first swing arm 102 has a first contact surface 106, and the support block 105 has a second contact surface 107, and when the first swing arm 102 is in the unfolded position, the first contact surface 106 abuts against the second contact surface 107; the second contact surface 107 is configured to be able to change its position on the base 101 to adjust the size of the flattening angle, so that the flattening angle is within a preset angle range. In the embodiment of the present application, the rotating shaft mechanism 100 adjusts the flattening angle by changing the position of the second contact surface 107 of the support block 105. Therefore, when designing the first swing arm 102 and the base 101, the processing accuracy of the first swing arm 102 and the base 101 can be appropriately reduced, and the first swing arm 102 and the base 101 can be designed to be over-expanded, that is, the flattening angle is greater than 180°, thereby reducing the processing accuracy of the two and reducing the error requirement for the coordination between the two when flattening. After being designed to be over-expanded, the range of the flattening angle is greater than 180° and not greater than 190°, which facilitates the adjustment of the support block 105. After being designed to be over-expanded, the specific value of the unfolding angle can be 184°, 185° or 186°, etc. Of course, after over-expanding, the flattening angle can also be a range. A support block 105 is installed on the base 101, and the support block 105 and the base 101 are rigidly connected. In this way, when the position of the second contact surface 107 of the support block 105 on the base 101 is changed, the flattening angle between the first swing arm 102 and the base 101 when the first swing arm 102 is in the deployed position can be conveniently adjusted, and the flattening angle can meet the preset angle requirement. In other words, the present application can moderately reduce the processing accuracy of the first swing arm 102 and the base 101, and adjust the flattening angle between the first swing arm 102 and the base 101 through the support block 105 to meet the tolerance band requirement of the flattened state.When the flattening angle meets the preset angle requirement, due to the rigid connection between the base 101 and the support block 105, the stability of the first swing arm 102 in the unfolded position is guaranteed. Therefore, at the moment when the first contact surface 106 and the second contact surface 107 abut against each other, the second contact surface 107 applies force to the first contact surface 106, 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, the first swing arm 102 is not prone to shaking at the moment when the first contact surface 106 and the second contact surface 107 abut against each other, which is conducive to avoiding a brief moment of over-expansion, thereby ensuring that the display screen 200 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 100.

[0108] It should be noted that over-extension means that the hinge mechanism 100 is excessively extended along the expansion direction; when the electronic device is an inward-folding screen mobile phone, the over-extension will cause the display screen 200 to be pulled; and when the electronic device is an outward-folding screen mobile phone, the over-extension will cause the display screen 200 to be squeezed.

[0109] In some embodiments, the support block 105 is a block structure, or a plate structure, with a certain thickness. The support block 105 has greater rigidity and hardness, which facilitates force transmission and improves the service life of the support block 105. The thickness direction of the support block 105 can be parallel to the BB direction, and the first contact surface 106 is an end surface in the thickness direction of the support block 105. In one embodiment, the material of the support block 105 can be the same as that of the base 101. For example, the support block 105 and the base 101 are both made of wear-resistant and hard metal material, and the metal material can be stainless steel or titanium; the material of the support block 105 can also be selected from other materials.

[0110] In some embodiments, the change in the position of the second contact surface 107 on the base 101 may be a way for the support block 105 to move relative to the base 101, so as to achieve a change in the flattening angle, thereby achieving adjustment of the flattening angle, so that the flattening angle is within a preset angle range. In other embodiments, the change in the position of the second contact surface 107 on the base 101 may also be an increase or decrease in the thickness of the support block 105, so as to achieve a change in the flattening angle, thereby achieving adjustment of the flattening angle, so that the flattening angle is within a preset angle range; for the increase or decrease in the thickness of the support block 105, it can be achieved by replacing the support block 105 with a different thickness. Regardless of whether the position of the support block 105 is moved or its own thickness is increased, it is generally necessary to ensure that the support block 105 and the base 101 are rigidly connected during adjustment, so that the flattening angle can be more accurately measured to see whether it is within the preset angle range.

[0111] In some embodiments, when the first swing arm 102 is in the deployed position, the second contact surface 107 is configured to be able to move in the direction of the first contact surface 106 to adjust the flattening angle. Since the first swing arm 102 is rotatably connected to the base 101, and when the first swing arm 102 is in the deployed position, the first contact surface 106 abuts against the second contact surface 107, when the position of the second contact surface 107 is changed to move in the direction of the first contact surface 106, the first swing arm 102 is rotated by a certain angle, so that the flattening angle is changed, which is conducive to making the flattening angle within a preset angle range.

[0112] It should be noted that, in order to facilitate the measurement of the flattening angle, the flattening angle is adjusted by moving the second contact surface 107 when the first swing arm 102 is in the unfolded position in the embodiment of the present application; the second contact surface 107 may also be moved when the first swing arm 102 is in other positions, such as when the first swing arm 102 is in the folded position or the semi-expanded position. Exemplarily, the support block 105 moves along a first direction, the first direction is perpendicular to the axial direction of the base 101, that is, the first direction is perpendicular to the AA direction; the first direction is parallel to the width direction of the base 101, that is, the first direction is parallel to the BB direction.

[0113] In some embodiments, the first swing arm 102 is located on the rotating shaft mechanism 100 close to the axial end of the rotating shaft mechanism 100, which makes it convenient to set the first contact surface 106 on the first swing arm 102 and the second contact surface 107 on the base 101, and facilitates the measurement of the flattening angle and the design of the support block 105. Of course, in some other possible cases, the first swing arm 102 can also be located at other positions on the rotating shaft mechanism 100.

[0114] In some embodiments, when the support block 105 is rigidly connected to the base 101, the support block 105 and the base 101 may be connected in a direct contact manner or an indirect contact manner. When the support block 105 and the base 101 are rigidly connected, the stability of the connection between the two can be ensured. For example, Fig. 9 As shown, the support block 105 and the base 101 are rigidly connected by direct contact.

[0115] In some embodiments, for the convenience of measurement, the flattening angle η is represented by the angle formed between the first reference surface 108 of the first swing arm 102 and the second reference surface 109 of the base 101; the first reference surface 108 and the second reference surface 109 can be planes respectively; in theory, when the first reference surface 108 is parallel to the second reference surface 109, the flattening angle η is 180°; and the angle formed between the first reference surface 108 and the second reference surface 109 satisfies the preset angle range, that is, the flattening angle η is within the preset angle range; the flattening angle η satisfies the preset angle range as follows: δ min ≤η≤δ max , δ min Less than or equal to δ max , where 175°≤δ min ≤180°, 180°≤δ max ≤185°, exemplary, δ min It can be 175°, 176°, 177°, 178°, 179° or 180°, δ max It can be 180°, 181°, 182°, 183°, 184° or 185°; of course, for the two end values ​​δ of the preset angle range min and δ max , and can also be determined according to actual design needs. For example, the second reference plane 109 can be located on the cover plate 111, and the second reference plane 109 can be perpendicular to the CC direction. Of course, in some other possible cases, the second reference plane 109 can also be located on the middle beam 110.

[0116] See also Fig. 9 As shown, in some embodiments, the base 101 includes a center beam 110 and a cover plate 111, and the cover plate 111 is fixedly connected to the center beam 110. For example, the cover plate 111 can be detachably fixedly connected to the center beam 110 by screws.

[0117] It should be noted that, in some other possible cases, the support block 105 may also be arranged on the first swing arm 102 or on the cover plate 111; when the support block 105 is arranged on the first swing arm 102, the first contact surface 106 and the second contact surface 107 are arranged in opposite directions, that is, the first contact surface 106 is located on the base 101, and the second contact surface 107 is located on the first swing arm 102.

[0118] Fig.10 is another schematic diagram of a partial structure of the rotating shaft mechanism 100 provided in an embodiment of the present application. Fig.10 Only one first door panel 104 is shown; Fig.10As shown, the first swing arm 102 is close to the end of the rotating shaft mechanism 100; the rotating shaft mechanism 100 is in the unfolded state, and the support block 105 is located at the edge of the width direction of the base 101, so that the first swing arm 102 is conveniently abutted against the support block 105. The middle beam 110 has an opposite first side surface 112, and the support block 105 is located on the first side surface 112. In this way, the support block 105 is arranged on the first side surface 112, which does not affect the connection between the cover plate 111 and the middle beam 110, and is convenient for the installation and fixation of the support block 105, and convenient for adjusting the flattening angle by using the support block 105.

[0119] Fig.11 is another schematic diagram of a partial structure of the rotating shaft mechanism 100 provided in an embodiment of the present application. Fig.12 yes Fig.11 The local enlarged schematic diagram of D in the middle, Fig.11 Only one first door panel 104 is shown; Fig.10 , Fig.11 and Fig.12 As shown, in some embodiments, the middle beam 110 has an embedding groove 114, and the embedding groove 114 is located on the first side surface 112; the support block 105 is installed in the embedding groove 114. Since the middle beam 110 has a certain length, thickness and width, it is convenient to set the embedding groove 114 for burying the support block 105 thereon, so that after the support block 105 is installed, the support block 105 will not affect the original performance of the base 101, and the embedding groove 114 can also better limit the support block 105, and facilitate the rigid fixed connection between the support block 105 and the middle beam 110. The shape of the embedding groove 114 can be adapted to the support block 105, and the side of the embedding groove 114 facing the first contact surface 106 of the first swing arm 102 is an opening 124, so that it is convenient to achieve the first contact surface 106 of the first swing arm 102 and the second contact surface 107 of the support block 105.

[0120] Fig.13 is a schematic diagram of the structure of the support block 105 in the embodiment of the present application; Fig.12 and Fig.13As shown, in some embodiments, the support block 105 includes a support body 115 and guide wings 116 arranged on two opposite sides of the support body 115, and the guide wings 116 are fixedly connected to the support body 115; there are guide grooves 117 on the two opposite groove walls of the embedded groove 114, and the guide wings 116 are slidably limited in the guide grooves 117. In this way, the support block 105 can be ensured to move in a preset direction by using the cooperation of the guide wings 116 and the guide grooves 117, even if the support block 105 moves in the direction where the first contact surface 106 is located, so as to facilitate the precise adjustment of the moving distance of the support block 105 relative to the base 101, so that the flattening angle can be adjusted more accurately to meet the preset angle range. Exemplarily, after the guide wings 116 are limited in the guide grooves 117, the support block 105 can move in the first direction, but cannot escape from the guide grooves 117 in the CC direction.

[0121] In some embodiments, the hinge mechanism 100 also includes a driving member, which is used to drive the support block 105 to move so as to change the position of the second contact surface 107 on the base 101. The use of the driving member is conducive to achieving precise adjustment of the movement of the support block 105, thereby improving the accuracy of the flattening angle adjustment.

[0122] Combination Fig.12 and Fig.13 As shown, in some embodiments, the center beam 110 has a first hole portion 118, and the support block 105 has a second hole portion 119. The first hole portion 118 and the second hole portion 119 can be assembled to form a tapered hole 121. The first hole portion 118 and the second hole portion 119 can be two parts formed by dividing the tapered hole 121 by a plane parallel to the axial direction of the tapered hole 121.

[0123] Fig.14 is a schematic diagram of the pyramid structure 120 in the embodiment of the present application; Fig.12 , 13 and Fig.14 As shown, the driving member includes a cone structure 120, which has a cone external thread, and a cone hole 121 has a cone internal thread that matches the cone external thread; the cone structure has a screw groove 140, which can be in the shape of a straight line, a cross, or a polygon, and the polygon can be a quadrilateral or a hexagon. The cone structure moves in the cone hole by cooperating with the screw groove 140 through a screwdriver. Please return Fig. 9As shown, when the first swing arm 102 is in the unfolded position, the cone structure 120 is configured to enable the support block 105 to move in the process of gradually screwing into the tapered hole 121, so as to drive the second contact surface 107 to move in the direction where the first contact surface 106 is located. In this way, by using the tapered internal thread in the tapered hole 121 and the tapered external thread on the cone structure 120 to cooperate, the support block 105 can be easily moved to move the second contact surface 107 in the direction where the first contact surface 106 is located, thereby facilitating the improvement of the accuracy of adjusting the flattening angle. For the tapered external thread, that is, after the external thread is set on the surface of the cone structure 120, since the shape of the cone structure 120 is conical, the external thread is called a tapered external thread; and for the tapered internal thread, that is, after the internal thread is set on the inner wall of the tapered hole 121, since the shape of the tapered hole 121 is conical, the internal thread is called a tapered internal thread.

[0124] Fig.15 is a schematic diagram of a partial structure of another form of a rotating shaft mechanism 100 provided in an embodiment of the present application; Fig.16 is a cross-sectional view of a partial structure of another form of the rotating shaft mechanism 100 in the embodiment of the present application; Fig.15 and Fig.16 As shown, in other embodiments, the number of support blocks 105 is multiple, and the thicknesses of the multiple support blocks 105 are arranged in an arithmetic progression. In this way, after providing multiple support blocks 105 with different thicknesses, the multiple support blocks 105 can be installed one by one on the base 101 to adjust the flattening angle, that is, when one support block 105 is installed on the base 101, the flattening angle is measured. When the preset angle range is not satisfied, another support block 105 can be replaced on the base 101. In this way, since only one support block 105 is located on the base 101 during each adjustment, the flattening angle can be easily adjusted. Since the thickness of each support block 105 is different, after the support block 105 is installed on the base 101, the position of the second contact surface 107 on the base 101 changes. For example, when the first swing arm 102 is in the deployed position, the support blocks 105 with different thicknesses are replaced, so that the second contact surface 107 is moved in the direction where the first contact surface 106 is located. For example, the number of support blocks 105 can be 4, 5 or 6, and the tolerance is 0.01 mm, that is, when the thickness of the plurality of support blocks 105 is arranged from small to large, the difference between two adjacent support blocks 105 with different thicknesses is 0.01 mm, thereby realizing a gradient change in the thickness of the plurality of support blocks 105; of course, the tolerance can also be designed according to actual needs. The support blocks 105 can be processed by CNC (Computer Numerical Control, computer numerical control machine tool).

[0125] Fig.171 is another schematic diagram of a partial structure of another form of a rotating shaft mechanism 100 provided in an embodiment of the present application. Fig.18 yes Fig.17 The local enlarged schematic diagram of point E in the middle, Fig.17 Only one first door panel 104 is shown; Fig.17 and Fig.18 As shown, since the embedding groove 114 is open on one side of the first contact surface 106 of the first swing arm 102, when a different support block 105 is replaced, the position of the second contact surface 107 on the base 101 changes, that is, the position in the first direction changes. When the flattening angle is adjusted using a plurality of different support blocks 105, after the entire rotating shaft mechanism 100 is assembled, the rotating shaft mechanism 100 is in an unfolded state, and the support block 105 with the smallest thickness can be installed on the middle beam 110 first, and it is determined whether another support block 105 needs to be replaced according to the measurement result of the flattening angle; after a certain support block 105 is installed and the flattening angle is within the preset angle range, the support block 105 is fixedly connected to the middle beam 110. Exemplarily, in the first direction, i.e., the width direction of the middle beam 110, the embedding groove 114 has a first groove wall 122 and a second groove wall 123 opposite to each other, the first groove wall 122 is opposite to the second contact surface 107, and the second groove wall 123 is opposite to the second contact surface 107; the embedding groove 114 has two first groove walls 122, and the two first groove walls 122 are spaced apart in the length direction of the middle beam 110 to form an opening 124, so that the side of the embedding groove 114 facing the first contact surface 106 of the first swing arm 102 is in an open form, thereby facilitating the abutment between the first contact surface 106 and the second contact surface 107; the arrangement of the first groove wall 122 and the second groove wall 123 ensures that the support block 105 will not move out in the width direction of the middle beam 110; the width direction of the middle beam 110 is parallel to the BB direction, and the length direction of the middle beam 110 is parallel to the AA direction.

[0126] In some embodiments, when the flattening angle is within the preset angle range, the support block 105 is fixedly connected to the base 101, and the second contact surface 107 is relatively fixed to the base 101, so that when the flattening angle meets the preset angle range, the support block 105 is fixed to the base 101, so as to achieve that the flattening angle is not easy to change during use. Exemplarily, the support block 105 and the base 101 are welded and fixed; in this way, after the flattening angle is adjusted by the support block 105, the support block 105 and the base 101 are fixed by welding, and then the rigid connection between the two is achieved, so as to improve the stability of the overall structure formed by the support block 105 and the base 101, and ensure that it is not easy to deform or loosen when subjected to external loads or impacts. In addition, since it is still a rigid connection, better stress transfer is formed between the support block 105 and the base 101, so that each component can better share the load, thereby extending the service life of the overall structure. Secondly, after adjusting the flattening angle using the support block 105, the support block 105 and the base 101 can be assembled together in one step by welding, without the need for additional connectors 103 or fasteners, which can not only reduce production costs, but also simplify the assembly process and improve production efficiency. Furthermore, the relative position between the two can be ensured by welding, thereby ensuring accuracy. Finally, due to the strong connection of welding, the connection between the support block 105 and the base 101 is not easy to be damaged, thereby reducing the need for daily maintenance and repair.

[0127] Fig.19 It is a partial structural diagram of the support block 105 and the base 101 in the embodiment of the present application. In some other embodiments, the support block 105 includes a vertical portion and a transverse portion 126. The second contact surface 107 is located on the vertical portion, and the transverse portion 126 extends in the thickness direction of the vertical portion. The thickness direction of the vertical portion is parallel to the width direction of the middle beam 110 (it can also be said to be the width direction of the base 101). In this way, the transverse portion 126 is used to facilitate the welding fixation between the support block 105 and the base 101. For example, when the embedding groove 114 is set on the middle beam 110, the transverse portion 126 can be used to better realize the welding fixation between the support block 105 and the middle beam 110, and the influence on the adjusted flattening angle during welding fixation can be reduced.

[0128] In some embodiments, the first contact surface 106 is a plane or a curved surface; the second contact surface 107 is a plane or a curved surface. In this way, the shapes of the first contact surface 106 and the second contact surface 107 can be determined according to actual design needs. The curved surface can be in the form of an arc surface or a spherical cap. Exemplarily, the first contact surface 106 is a plane, and the second contact surface 107 is a plane. The first contact surface 106 and the second contact surface 107 are both planes. On the one hand, it is convenient to process the plane. On the other hand, the support block 105 can be used to easily achieve the preset angle range of the flattening angle and ensure the adjustment accuracy.

[0129] It should be noted that, in some other possible implementations, at least one of the first contact surface 106 and the second contact surface 107 may also be a curved surface; in addition, one of the first contact surface 106 and the second contact surface 107 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.

[0130] Fig. 20 FIG. 1 is a partial structural diagram of the rotating shaft mechanism 100 in the embodiment of the present application when the cover plate 111 is not installed. Fig. 20 As shown, in some embodiments, the pivot mechanism 100 also includes a second swing arm 127, one end of the second swing arm 127 is rotatably connected to the base 101, the other end of the second swing arm 127 is rotatably connected to the connecting member 103, and the first door panel 104 is fixedly connected to the portion between the two ends of the second swing arm 127, so that the first door panel 104 can move as the second swing arm 127 rotates relative to the base 101. The second swing arm 127 includes two connected rotating sub-arms 128, the rotating sub-arms 128 are in an arc shape, and the connection between the two rotating sub-arms 128 is fixedly connected to the first door panel 104; the connecting member 103 and the base 101 are respectively provided with a first slide groove 129 that matches the rotating sub-arm 128, the first slide groove 129 is in an arc shape, and the rotating sub-arm 128 is limited in the first slide groove 129 to prevent the rotating sub-arm 128 from escaping from the first slide groove 129, but the rotating sub-arm 128 can rotate around an axis parallel to the AA direction in the first slide groove 129. The middle beam 110 also has a second side surface 113 opposite to the first side surface 112, and the cover plate 111 is fixed to the second side surface 113, so that the connection between the cover plate 111 and the middle beam 110 is not affected.

[0131] Fig.21 is a schematic diagram of the structure of the first swing arm 102 in the embodiment of the present application, Fig. 22 is a structural diagram of the first swing arm 102 from another perspective in the embodiment of the present application; Fig. 20 , Fig.21 and Fig. 22As shown, in some embodiments, the first swing arm 102 includes a sliding portion 130 and a rotating portion 131, the sliding portion 130 is fixedly connected to the rotating portion 131; the rotating portion 131 is rotatably connected to the middle beam 110; the hinge mechanism 100 also includes a connecting member 103, the sliding portion 130 is slidably connected to the connecting member 103, wherein the connecting member 103 has a sliding groove 139, the sliding portion 130 is limited in the sliding groove 139, and the sliding portion 130 can move along the guide direction of the sliding groove 139; in this way, the first contact surface 106 is arranged on the first swing arm 102 that slides with the base 101, and after the hinge mechanism 100 is assembled, the position for adjusting the support block 105 can be exposed to the outside, thereby facilitating the adjustment and fixing of the support block 105. Exemplarily, the sliding part 130 and the rotating part 131 are an integral structure, and the sliding part 130 includes a main structure 132 and sliding wings 133 located on opposite sides of the main structure 132, the sliding wings 133 are slidably disposed in the sliding groove 139, and the sliding wings 133 are limited in the sliding groove 139 by the sliding groove 139, so that the sliding wings 133 can only move along the guide direction of the sliding groove 139, and the sliding wings 133 will not fall out along the CC direction, so that the sliding part 130 is limited in the sliding groove 139 by the sliding wings 133, and the sliding part 130 can move along the guide direction of the sliding groove 139. The guide direction of the sliding groove 139 can be parallel to the first direction, or in other words, the guide direction of the sliding groove 139 is parallel to the length direction of the sliding groove 139.

[0132] Combination Fig. 20 , Fig.21 and Fig. 22 As shown, in some embodiments, the rotating portion 131 has a first arc surface 134 and a second arc surface 135 relative to each other, so that the rotating portion 131 is in an arc shape, the first arc surface 134 is a concave surface, and the second arc surface 135 is a convex surface; the first swing arm 102 also includes a butt joint 141 and a connecting beam 142, the sliding portion 130 and the rotating portion 131 are fixedly connected by the connecting beam, and the butt joint 141 is fixedly connected to the connecting beam 142; the first contact surface 106 is arranged on the butt joint 141, the first contact surface 106 is away from the first arc surface 134, and the first contact surface 106 is close to the second arc surface 135. In this way, the first contact surface 106 is arranged on the abutment portion 141, which is beneficial for the first contact surface 106 to have an appropriate area, so as to reduce stress when the first contact surface 106 abuts against the second contact surface 107, thereby ensuring that the first contact surface 106 or the second contact surface 107 is not easily worn or dented during long-term use, thereby ensuring that the flattening angle can still meet the preset angle range during long-term use.

[0133] Please return Fig. 9As shown, the base 101 also includes a cover plate 111, which is fixedly connected to the middle beam 110; the cover plate 111 has a third arc surface 136, and the middle beam 110 has a fourth arc surface 137 opposite to the third arc surface 136, so that an arc groove 138 is formed between the middle beam 110 and the cover plate 111; the first arc surface 134 cooperates with the third arc surface 136, and the second arc surface 135 cooperates with the fourth arc surface 137, so that the rotating part 131 is rotatably set in the arc groove 138, so that the arc-shaped rotating part 131 cooperates with the arc groove 138, so as to realize the rotation 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 contact surface 107 on the base 101 and setting the first contact surface 106 on the first swing arm 102, and facilitating the abutment between the first contact surface 106 and the second contact surface 107.

[0134] In one or more embodiments, the present application also provides a design method for the hinge mechanism 100, which is applicable to the hinge mechanism 100 in any embodiment provided in the present application. The electronic device in the embodiment of the present application can also adopt the hinge mechanism 100 designed by the design method of the hinge mechanism 100.

[0135] The design method of the rotating shaft mechanism 100 provided in the embodiment of the present application includes:

[0136] A first contact surface 106 and a second contact surface 107 are respectively designed on the first swing arm 102 and the support block 105;

[0137] The first swing arm 102 is rotatably connected to the base 101, and the support block 105 is installed on the base 101, and the support block 105 is rigidly connected to the base 101;

[0138] When the first swing arm 102 is in the unfolded position, the first contact surface 106 and the second contact surface 107 are in contact with each other, and the angle formed between the first swing arm 102 and the base 101 is the flattening angle;

[0139] Changing the position of the second contact surface 107 on the base 101 so that the flattening angle is within a preset angle range;

[0140] After the flattening angle is within the preset angle range, the support block 105 is fixedly connected to the base 101 .

[0141] By adopting the design method of the rotating shaft mechanism 100 provided in the embodiment of the present application, when designing the first swing arm 102 and the base 101, the processing accuracy of the first swing arm 102 and the base 101 can be appropriately reduced, and the first swing arm 102 and the base 101 can be designed to be over-expanded, that is, the flattening angle is greater than 180°, thereby reducing the processing accuracy of the two and reducing the error requirement for the coordination between the two when flattened. After being designed to be over-expanded, the range of the flattening angle is greater than 180° and not greater than 190°, which facilitates the adjustment of the support block 105. After being designed to be over-expanded, the specific value of the expansion angle can be 184°, 185° or 186°, etc. Of course, after over-expanding, the flattening angle can also be a range. A support block 105 is installed on the base 101, and the support block 105 and the base 101 are rigidly connected. In this way, when the position of the second contact surface 107 of the support block 105 on the base 101 is changed, the flattening angle between the first swing arm 102 and the base 101 when the first swing arm 102 is in the deployed position can be conveniently adjusted, and the flattening angle can meet the preset angle requirement. That is to say, the embodiment of the present application can moderately reduce the processing accuracy of the first swing arm 102 and the base 101, and adjust the flattening angle between the first swing arm 102 and the base 101 through the support block 105 to meet the tolerance band requirement of the flattened state. When the flattening angle meets the preset angle requirement, since the base 101 and the support block 105 are rigidly connected, and the support block 105 is fixedly connected to the base 101, the stability of the first swing arm 102 in the unfolded position is ensured. Therefore, at the moment when the first contact surface 106 and the second contact surface 107 abut against each other, the second contact surface 107 applies force to the first contact surface 106, 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, the first swing arm 102 is not prone to shaking at the moment when the first contact surface 106 and the second contact surface 107 abut against each other, which is conducive to avoiding a brief moment of over-expansion, thereby ensuring that the display screen 200 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 100.

[0142] See also Fig. 9 As shown, in some embodiments, the method of changing the position of the second contact surface 107 on the base 101 includes:

[0143] A first hole 118 is formed on the middle beam 110 of the base 101, and a second hole 119 is formed on the support block 105, so that the first hole 118 and the second hole 119 can be combined to form a tapered hole 121;

[0144] A conical external thread is provided on a cone structure 120, and the conical hole 121 has a conical internal thread matching the conical external thread;

[0145] When the first swing arm 102 is in the unfolded position, the support block 105 can be moved in the process of gradually screwing the cone structure 120 into the tapered hole 121, so as to drive the second contact surface 107 to move in the direction of the first contact surface 106. By moving the support block 105 relative to the base 101 to change the position of the second contact surface 107, the flattening angle can be adjusted conveniently.

[0146] See also Fig.16 As shown, in some other embodiments, the method of changing the position of the second contact surface 107 on the base 101 includes:

[0147] Design a plurality of support blocks 105 with different thicknesses, and arrange the plurality of support blocks 105 with different thicknesses in an ascending order of thickness;

[0148] A plurality of support blocks 105 arranged in ascending order of thickness are installed one by one on the base 101 starting from the support block 105 with the smallest thickness, and one support block 105 is installed on the base 101;

[0149] After the support block 105 with the smallest thickness is installed on the base 101, the flattening angle is measured, and the measured flattening angle is compared with the preset angle range for judgment;

[0150] When the measured flattening angle meets the preset angle range, it indicates that the support block 105 currently installed on the base 101 can make the flattening angle within the preset angle range;

[0151] When the measured flattening angle does not meet the preset angle range, the support block 105 currently located on the base 101 is removed, and another support block 105 with a different thickness is replaced and installed on the base 101 to change the position of the second contact surface 107 on the base 101;

[0152] Re-measure the flattening angle, and determine whether the re-measured flattening angle meets the preset angle range;

[0153] When the re-measured flattening angle does not meet the preset angle range, the support blocks 105 of different thicknesses are repeatedly replaced and installed, and the measured flattening angle is compared with the preset angle range until the flattening angle meets the preset angle range. By replacing the support blocks 105 of different thicknesses to change the position of the second contact surface 107 on the base 101, the flattening angle can be adjusted more flexibly.

[0154] In a method of using a plurality of support blocks 105 of different thicknesses to change the position of the second contact surface 107 on the base 101, the above-mentioned method of trying to replace support blocks 105 of different thicknesses can be adopted; or the thickness of the support block 105 can be calculated by calculating the difference between the flattening angle η when the support block 105 is not installed and the preset angle range to obtain the thickness of the support block 105. This method can save debugging time.

[0155] In some other embodiments, the method of calculating the thickness of the support block 105 by calculating the difference between the flattening angle η when the support block 105 is not installed and the preset angle range includes:

[0156] Determine the preset angle range;

[0157] Calculate the flattening angle η when the support block 105 is not installed and the upper limit δ of the preset angle range max and the lower limit δ min The difference between min and the second difference θ max ,θ min =η-δ max ,θ max =η-δ min , where the first difference θ min The flattening angle η when the support block 105 is not installed is respectively equal to the upper limit δ of the preset angle range max The second difference θ max The flattening angle η when the support block 105 is not installed is respectively equal to the lower limit δ of the preset angle range min The difference between

[0158] According to the first difference θ min The first thickness value is calculated, which is the minimum thickness value of the support block 105. min The second thickness value, i.e., the maximum thickness value of the support block 105, is calculated, wherein the thickness value within the range between the first thickness value and the second thickness value is the thickness value of the support block 105 corresponding to when the flattening angle is within the preset angle range, the first thickness value is the lower limit of the thickness value of the support block 105, and the second thickness value is the upper limit of the thickness value of the support block 105;

[0159] A support block 105 of suitable thickness is selected so that the thickness of the support block 105 is within a range between the first thickness value and the second thickness value, so that after the support block 105 of suitable thickness is installed, the flattening angle can be within a preset angle range.

[0160] Fig.23 1 is a schematic diagram of the contact point analysis of the base 101 without the support block 105 installed and after the support block 105 is installed in the embodiment of the present application, see Fig.23As shown, in some other embodiments, according to the first difference θ min The first thickness value is calculated, and the second difference value θ max The method for calculating the second thickness value can be obtained according to the following formula:

[0161]

[0162] in, μ represents the first angle between the line between the contact point G of the first swing arm 102 and the cover plate 111 and the contact point F of the first swing arm 102 and the middle beam 110 before the support block 105 is installed, and the horizontal direction; ν represents the second angle between the line between the contact point G of the first swing arm 102 and the cover plate 111 and the contact point F of the first swing arm 102 and the middle beam 110 after the support block 105 is installed, and the horizontal direction; x represents the thickness value of the support block 105, l1 represents the projection value of the line between the contact point G of the first swing arm 102 and the cover plate 111 and the contact point F of the first swing arm 102 and the middle beam 110 in the CC direction, l2 represents the projection value of the line between the contact point G of the first swing arm 102 and the cover plate 111 and the contact point F of the first swing arm 102 and the middle beam 110 in the BB direction, and θ represents the change between the first angle and the second angle. θ is θ min When δ is equal to δ max ; θ is taken as θ max When δ is equal to δ min ; l1 and l2 can be obtained by measurement, and the first difference θ min and the second difference θ max Substituting into the above formulas respectively, the corresponding values ​​of x are obtained, which are the first thickness value and the second thickness value. F1 represents the contact point between the first swing arm 102 and the middle beam 110 when the support block 105 is not installed, that is, the contact point F between the first swing arm 102 and the middle beam 110 when the support block 105 is not installed; F2 represents the contact point between the first swing arm 102 and the middle beam 110 when the support block 105 is installed, that is, the contact point F between the first swing arm 102 and the middle beam 110 when the support block 105 is installed, and F2 is the contact point between the first swing arm 102 and the support block 105.

[0163] It should be noted that, since the first contact surface of the support block can be a plane or a curved surface, and the shape of the support block can be a rectangular parallelepiped, etc., there may be a situation where the line between F1 and F2 is parallel to the BB direction. In addition, the above calculation formula is only one implementation method, and the calculation of the thickness of the support block can also be implemented by other calculation methods. When the first swing arm 102 is in the deployed position relative to the base 101, the force applied by the first swing arm 102 to the base 101 is similar to the force applied by a lever to the fulcrum. Therefore, it can be said that at this time, there is a contact point G between the first swing arm 102 and the cover plate 111, and there is a contact point F between the first swing arm 102 and the middle beam 110 (see Fig.16 shown).

[0164] In some embodiments, the method of fixedly connecting the support block 105 to the base 101 includes:

[0165] The support block 105 is fixed to the base 101 by welding; when the support block 105 is installed on the middle beam 110 of the base 101, the support block 105 is fixed to the middle beam 110 by welding. Fixing by welding can ensure the strength and stability of the rigid connection between the support block 105 and the base 101.

[0166] In the description of the specification of the present application, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0167] 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 it. 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 rotating shaft mechanism, characterized in that: include: Pedestal; 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 unfolded position, the angle between the first swing arm and the base is a flattening angle; A support block, the support block is located on the base, the support block is rigidly connected to the base, the first swing arm has a first contact surface, the support block has a second contact surface, and when the first swing arm is in the deployed position, the first contact surface abuts against the second contact surface; Wherein, the second contact surface is configured to be capable of changing its position on the base so that the flattening angle is within a preset angle range.

2. The rotating shaft mechanism according to claim 1, characterized in that: When the first swing arm is in the unfolded position, the second contact surface is configured to be movable toward the direction where the first contact surface is located so as to adjust the flattening angle.

3. The rotating shaft mechanism according to claim 2, characterized in that: The base includes a middle beam, the middle beam has an embedding groove, and the support block is installed in the embedding groove.

4. The rotating shaft mechanism according to claim 3, characterized in that: The rotating shaft mechanism further includes a driving member, and the driving member is used to drive the supporting block to move so as to change the position of the second contact surface on the base.

5. The rotating shaft mechanism according to claim 4, characterized in that: The center beam has a first hole portion, the support block has a second hole portion, and the first hole portion and the second hole portion can be combined to form a tapered hole; The driving member comprises a cone structure, the cone structure has a cone external thread, and the cone hole has a cone internal thread matching the cone external thread; When the first swing arm is in the expanded position, the cone structure is configured to enable the support block to move during the process of gradually rotating into the tapered hole, so as to drive the second contact surface to move in the direction where the first contact surface is located.

6. The rotating shaft mechanism according to claim 3, characterized in that: The support block comprises a support body and guide wings arranged on two opposite sides of the support body, and the guide wings are fixedly connected to the support body; The two opposite groove walls of the embedding groove are provided with guide grooves, and the guide wings are slidably limited in the guide grooves.

7. The rotating shaft mechanism according to claim 3, characterized in that: The first swing arm includes a sliding portion and a rotating portion, and the sliding portion is fixedly connected to the rotating portion; The rotating part is rotatably connected to the middle beam; The rotating shaft mechanism also includes a connecting member, and the sliding part is slidably connected to the connecting member, wherein the connecting member has a sliding groove, the sliding part is limited in the sliding groove, and the sliding part can move along the guiding direction of the sliding groove.

8. The rotating shaft mechanism according to claim 7, characterized in that: The rotating part has a first arc surface and a second arc surface opposite to each other, so that the rotating part is in an arc shape, the first arc surface is a concave surface, and the second arc surface is a convex surface; The first swing arm further includes an abutment portion and a connecting beam, the sliding portion and the rotating portion are fixedly connected via the connecting beam, and the abutment portion is fixedly connected to the connecting beam; The first contact surface is disposed on the abutting portion, the first contact surface is away from the first arc surface, and the first contact surface is close to the second arc surface.

9. The rotating shaft mechanism according to claim 8, characterized in that: The base further includes a cover plate, which is fixedly connected to the middle beam; the cover plate has a third arc surface, and the middle beam has a fourth arc surface opposite to the third arc surface, so that an arc groove is formed between the middle beam and the cover plate; The first arc surface matches with the third arc surface, and the second arc surface matches with the fourth arc surface, so that the rotating part is rotatably disposed in the arc groove.

10. The rotating shaft mechanism according to claim 9, characterized in that: The center beam has a first side surface and a second side surface that are opposite to each other. The embedding groove is arranged on the first side surface, and the cover plate is fixed on the second side surface.

11. The rotating shaft mechanism according to any one of claims 1 to 3 and 7 to 10, characterized in that: There are multiple support blocks, and the thicknesses of the multiple support blocks are arranged in an arithmetic progression.

12. The rotating shaft mechanism according to any one of claims 1 to 10, characterized in that: When the flattening angle is within a preset angle range, the support block is fixedly connected to the base, and the second contact surface and the base remain relatively fixed.

13. The rotating shaft mechanism according to claim 12, characterized in that: The support block is fixed to the base by welding.

14. The rotating shaft mechanism according to any one of claims 1 to 10, characterized in that: The first contact surface is a plane or a curved surface; the second contact surface is a plane or a curved surface.

15. A method for designing a rotating shaft mechanism, characterized in that: The design approach includes: A first contact surface and a second contact surface are respectively designed on the first swing arm and the support block; The first swing arm is rotatably connected to the base, and the support block is installed on the base, and the support block is rigidly connected to the base; When the first swing arm is in the unfolded position, the first contact surface and the second contact surface are in contact with each other, and the angle formed by the first swing arm and the base is the flattening angle; Changing the position of the second contact surface on the base so that the flattening angle is within a preset angle range; After the flattening angle is within a preset angle range, the support block is fixedly connected to the base.

16. The design method of the rotating shaft mechanism according to claim 15, characterized in that: The step of fixedly connecting the support block to the base comprises: The support block is fixed to the base by welding.

17. An electronic device, characterized in that: A device comprising a first sub-shell, a second sub-shell, and a rotating shaft mechanism according to any one of claims 1 to 14, or a rotating shaft mechanism designed by the design method of the rotating shaft mechanism according to claim 15 or 16; 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.

18. The electronic device according to claim 17, characterized in that: 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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