Rotating shaft mechanism, design method thereof, and electronic device

Abstract

The application discloses a rotating shaft mechanism and a design method thereof and an electronic device, and belongs to the technical field of electronic devices. The rotating shaft mechanism comprises a base, a first swing arm and a supporting block. The first swing arm is rotationally connected with the base, and the first swing arm can rotate relative to the base between an unfolded position and a folded position. When the first swing arm is in the unfolded position, an angle between the first swing arm and the base is a flattened angle. The supporting block is located on the base and is rigidly connected with the base. The first swing arm has a first contact surface, and the supporting block has a second contact surface. When the first swing arm is in the unfolded position, the first contact surface abuts against the second contact surface. The second contact surface is configured to change the position on the base so that the flattened angle is located in a preset angle range. The electronic device comprises a first sub-housing, a second sub-housing and the rotating shaft mechanism. The application is beneficial to guaranteeing the reliability of the electronic device and improving the yield of the electronic device or the rotating shaft mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and in particular to a rotating shaft mechanism, a design method thereof, and an electronic device. BACKGROUND

[0002] With the popularity of electronic devices such as mobile phones and tablet computers in daily life, people's demand for convenience and portability is increasing. In this case, foldable electronic devices have emerged, which not only meet the requirement of portability, but also bring users a large-screen visual experience through flexible display screen technology.

[0003] A foldable electronic device is composed of two middle frames and a rotating shaft mechanism, and the two middle frames are connected to each other through the rotating shaft mechanism. At the same time, a flexible display screen is fixed on the two middle frames. This design allows the electronic device to freely switch between folded and unfolded states. In the unfolded state, the part of the flexible display screen fixedly connected with the middle frame needs to be kept in a plane, so as to ensure the best user experience.

[0004] In order to ensure that the part of the flexible display screen fixedly connected with the two middle frames is kept in a plane in the unfolded state of the electronic device, the unfolding angle formed between the shaft seat and the rotating part of the rotating shaft mechanism needs to satisfy 180°. However, due to the increasing thinness of the rotating shaft mechanism and the middle frame, and the precision limit of the processing technology, the current technology is difficult to meet the requirement that the unfolding angle of the flexible display screen in the unfolded state satisfies the tolerance band, which leads to a low yield of the electronic device or the rotating shaft mechanism. SUMMARY

[0005] The present application provides a rotating shaft mechanism, a design method thereof, and an electronic device, to solve the problem that the current technology is difficult to meet the requirement that the unfolding angle of the flexible display screen in the unfolded state satisfies the tolerance band, which leads to a low yield of the electronic device or the rotating shaft mechanism.

[0006] The technical solution is as follows:

[0007] The first aspect of the present application provides a rotating shaft mechanism, which comprises a base, a first swing arm, and a support block.

[0008] The first swing arm is rotationally connected with the base, and the first swing arm can rotate relative to the base between an unfolded position and a folded position. When the first swing arm is in the unfolded position, the angle between the first swing arm and the base is an unfolding angle.

[0009] The support block is located on the base and is rigidly connected with the base. The first swing arm has a first contact surface, and the support block has a second contact surface. 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 position on the base so that the unfolding angle is within a preset angle range.

[0011] By adopting the above scheme, when designing the first swing arm and the base, the machining precision of the first swing arm and the base can be moderately reduced, and the first swing arm and the base can be designed in an over-unfolding manner, that is, the unfolding angle is greater than 180°, the machining precision of the two is reduced, and the error requirement of the two when being matched in unfolding is reduced. The support block is installed on the base, and the support block is rigidly connected with the base, so that when the position of the second contact surface of the support block on the base is changed, the unfolding angle between the first swing arm and the base when the first swing arm is in the unfolded position can be conveniently adjusted, and the unfolding angle can meet the preset angle requirement. That is, the present application can adjust the unfolding angle between the first swing arm and the base through the support block to meet the tolerance band requirement of the unfolding state under the condition that the machining precision of the first swing arm and the base is moderately reduced. When the unfolding angle meets the preset angle requirement, since the base and the support block are rigidly connected, the stability of the first swing arm in the unfolded position is ensured, so that at the moment when the first contact surface and the second contact surface abut against each other, the second contact surface exerts force on 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, at the moment when the first contact surface and the second contact surface abut against each other, the first swing arm is not prone to shaking, that is, it is beneficial to avoid the short moment of over-unfolding, thereby benefiting to ensure that the display screen on the electronic device will not be pulled or squeezed due to over-unfolding, and ensuring the reliability of the electronic device and improving the yield of the electronic device or the rotation shaft mechanism.

[0012] In some implementations, when the first swing arm is in the unfolded position, the second contact surface is configured to be capable of moving in the direction in which the first contact surface is located, so as to adjust the unfolding angle.

[0013] By adopting the above scheme, since the first swing arm and the base are rotationally connected, and when the first swing arm is in the unfolded position, the first contact surface and the second contact surface abut against each other, when the position of the second contact surface is changed and the second contact surface moves in the direction in which the first contact surface is located, the first swing arm will rotate by a certain angle, thereby changing the unfolding angle, and thereby benefiting to make the unfolding angle within a preset angle range.

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

[0015] By adopting the above scheme, since the middle beam has a certain length, thickness and width, it is convenient to set the embedding groove for embedding the support block on the middle beam, 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 the rigid fixed connection between the support block and the middle beam can be conveniently realized.

[0016] In some implementations, the rotating shaft mechanism further comprises a driving member configured to drive the support block to move so as to change the position of the second contact surface on the base.

[0017] By employing the above scheme, the driving member is used to facilitate the accurate adjustment of the movement of the support block, thereby improving the accuracy of the adjustment of the unfolding angle.

[0018] In some implementations, the middle beam has a first hole portion, and the support block has a second hole portion, the first hole portion and the second hole portion being capable of being combined to form a tapered hole.

[0019] The driving member comprises a tapered structure having a conical outer thread, and the tapered hole has a conical inner thread matched with the conical outer thread.

[0020] When the first swing arm is in the unfolded position, the tapered structure is configured to move the support block to move the second contact surface in the direction of the first contact surface in the process of gradually screwing into the tapered hole.

[0021] By employing the above scheme, the conical inner thread in the tapered hole and the conical outer thread on the tapered structure are matched to facilitate the movement of the support block to move the second contact surface in the direction of the first contact surface, thereby improving the accuracy of the adjustment of the unfolding angle.

[0022] In some implementations, the support block comprises a support body and a guide wing arranged on opposite sides of the support body, the guide wing being fixedly connected with the support body.

[0023] The opposite two groove walls of the embedded groove have a guide groove, and the guide wing is slidingly limited in the guide groove.

[0024] By employing the above scheme, the guide wing and the guide groove are used to ensure that the support block moves in the preset direction, i.e. moves in the direction of the first contact surface, thereby facilitating the accurate adjustment of the movement distance of the support block relative to the base, which can more accurately adjust the unfolding angle to meet the preset angle range.

[0025] In some implementations, the first swing arm comprises a sliding portion and a rotating portion, the sliding portion being fixedly connected with the rotating portion.

[0026] The rotating portion is rotatably connected with the middle beam.

[0027] The rotating shaft mechanism further comprises a connecting member, the sliding portion being slidingly connected with the connecting member, wherein the connecting member has a sliding groove, the sliding portion being limited in the sliding groove and being capable of moving in the guide direction of the sliding groove.

[0028] By adopting the above scheme, the first contact surface is arranged on the first swing arm which slides with the base, so that the position of the supporting block which is adjusted can be exposed outside after the rotating shaft mechanism is assembled, thereby facilitating the adjustment and the fixing of the supporting block.

[0029] In some implementations, the rotating part has opposite first and second circular arc surfaces, so that the rotating part is in the shape of a circular arc, the first circular arc surface is concave, and the second circular arc surface is convex.

[0030] The first swing arm further includes an abutting part and a connecting beam, and the sliding part and the rotating part are fixedly connected through the connecting beam, and the abutting part is fixedly connected with the connecting beam.

[0031] The first contact surface is arranged on the abutting part, and the first contact surface is away from the first circular arc surface and close to the second circular arc surface.

[0032] By adopting the above scheme, the first contact surface is arranged on the abutting part, so that the first contact surface can have a proper area, so as to reduce stress when the first contact surface abuts against the second contact surface, thereby facilitating the long-term use of the first contact surface or the second contact surface without being prone to wear or being pressed into a pit, and thus the unfolding angle can also meet the preset angle range during long-term use.

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

[0034] The first circular arc surface cooperates with the third circular arc surface, and the second circular arc surface cooperates with the fourth circular arc surface, so that the rotating part is arranged in the arc groove in a rotating manner.

[0035] By adopting the above scheme, the rotating part in the shape of a circular arc cooperates with the arc groove, so that the first swing arm and the base are connected in a virtual shaft manner, which facilitates the arrangement of the second contact surface on the base, the arrangement of the first contact surface on the first swing arm, and the abutment of the first contact surface and the second contact surface.

[0036] In some implementations, the middle beam has opposite first and second side surfaces, and the embedded groove is arranged on the first side surface, and the cover plate is fixed on the second side surface.

[0037] By adopting the above scheme, the embedded groove is arranged on the first side surface, which does not affect the connection between the cover plate and the middle beam, and facilitates the installation and fixation of the supporting block and the adjustment of the unfolding angle by the supporting block.

[0038] In some implementations, the number of supporting blocks is multiple, and the thicknesses of the multiple supporting blocks are arranged in an arithmetic sequence.

[0039] By adopting the above scheme, after a plurality of support blocks with different thicknesses are arranged, the plurality of support blocks can be installed on the base one by one to adjust 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 met, another support block can be replaced on the base. Thus, since only one support block is located on the base during each adjustment, the flattening angle can be conveniently adjusted. Since each support block has a different thickness, the position of the second contact surface on the base changes after the support block is installed on the base. For example, when the first swing arm is in the unfolded position, replacing the support block with a different thickness facilitates the movement of the second contact surface in the direction of the first contact surface.

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

[0041] By adopting the above scheme, when the flattening angle meets the preset angle range, the support block is fixed with the base, so as to prevent the flattening angle from changing during use.

[0042] In some implementations, the support block is fixedly connected with the base by welding.

[0043] By adopting the above scheme, after the flattening angle is adjusted by the support block, the support block is fixed with the base by welding, thereby achieving rigid connection between the two, which improves the stability of the overall structure formed by the support block and the base, and ensures that the overall structure is not easily deformed or loose under external load or impact. In addition, since it is also rigidly connected, better stress transmission is formed between the support block and the base, so that the components can better share the load, thereby prolonging the service life of the overall structure. Secondly, after the flattening angle is adjusted by 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 not only reduces production costs, but also simplifies the assembly process and improves production efficiency. Furthermore, welding can ensure the relative position between the two, thereby ensuring accuracy. Finally, due to the strong connection by welding, the connection between the support block and the base is not easily 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; and the second contact surface is a plane or a curved surface.

[0045] By adopting the above scheme, the shapes of the first contact surface and the second contact surface can be determined according to actual design needs. In addition, when both the first contact surface and the second contact surface are planes, on the one hand, it is convenient to machine a plane, and on the other hand, the use of a support block can easily achieve the preset angle range of the flattening angle and ensure the adjustment accuracy.

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

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

[0048] rotatably connecting the first swing arm with the base and mounting the support block on the base, and rigidly connecting the support block with the base;

[0049] when the first swing arm is in the unfolded position, the first contact surface and the second contact surface abut against each other, and the angle between the first swing arm and the base is a 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 the preset angle range, fixedly connecting the support block with the base.

[0052] By using the above scheme, when the first swing arm and the base are designed, the machining precision of the first swing arm and the base can be moderately reduced, and the first swing arm and the base can be designed in an over-flattening form, i.e., the flattening angle is greater than 180°, so as to reduce the machining precision of the two and the error requirement when they are matched in the flattening state. The support block is mounted on the base and rigidly connected with the base, so that 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 unfolded position can be conveniently adjusted, and the flattening angle can meet the preset angle requirement. That is, the present application can adjust the flattening angle between the first swing arm and the base through the support block to meet the tolerance band requirement of the flattening state while moderately reducing the machining precision of the first swing arm and the base. When the flattening angle meets the preset angle requirement, the base and the support block are rigidly connected, which ensures the stability of the first swing arm in the unfolded position, so that the force applied by the second contact surface to the first contact surface can be directly transmitted to the first swing arm at the moment when the first contact surface and the second contact surface abut against each other. Since the first swing arm and the base are still rotatably connected, the first swing arm is not prone to shaking at the moment when the first contact surface and the second contact surface abut against each other, which is conducive to avoiding the over-flattening moment, so as to prevent the display screen on the electronic device from being pulled or squeezed due to over-flattening, and ensure the reliability of the electronic device and improve the yield of the electronic device or the rotating shaft mechanism.

[0053] In some implementations, fixedly connecting the support block with the base comprises:

[0054] welding the support block with the base.

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

[0056] The third aspect of the present application provides an electronic device, which comprises a first sub-housing, a second sub-housing, and any one of the above-mentioned pivot mechanisms or a pivot mechanism designed by the above-mentioned design method.

[0057] The first sub-housing and the second sub-housing are respectively connected with the pivot mechanism, and the first sub-housing and the second sub-housing can be relatively rotated through the pivot mechanism.

[0058] By adopting the above scheme, when designing the first swing arm and the base, the machining precision of the first swing arm and the base can be moderately reduced, and the first swing arm and the base can be designed in an over-expansion form, i.e., the unfolding angle is greater than 180°, so as to reduce the machining precision of the two, thereby reducing the error requirement of the two when being unfolded. The support block is mounted on the base, and the support block and the base are rigidly connected, so that when the position of the second contact surface of the support block on the base is changed, the unfolding angle between the first swing arm and the base when the first swing arm is in the unfolded position can be conveniently adjusted, and the unfolding angle can meet the preset angle requirement. That is, the present application can adjust the unfolding angle between the first swing arm and the base through the support block to meet the tolerance band requirement of the unfolded state while moderately reducing the machining precision of the first swing arm and the base. When the unfolding angle meets the preset angle requirement, the base and the support block are rigidly connected, which ensures the stability of the first swing arm when it is in the unfolded position. Therefore, at the moment when the first contact surface and the second contact surface abut against each other, the second contact surface exerts force on 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 and the second contact surface abut against each other. That is, it is beneficial to avoid the short moment of over-expansion, thereby benefiting the guarantee that the display screen on the electronic device will not be pulled or squeezed due to over-expansion, and ensuring the reliability of the electronic device and improving the yield of the electronic device or the pivot mechanism.

[0059] In some implementations, the electronic device further comprises a flexible display screen, and the first sub-housing and the second sub-housing are respectively fixedly connected with the flexible display screen.

[0060] By adopting the above scheme, the pivot mechanism with the support block is applied to the foldable electronic device. BRIEF DESCRIPTION OF DRAWINGS

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

[0062] Figure 2is a structural schematic diagram of an electronic device in a half-unfolded state provided by an embodiment of the present application;

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

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

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

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

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

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

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

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

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

[0072] Figure 12 is Figure 11 is a partial enlarged schematic diagram at D in the middle;

[0073] Figure 13 is a structural schematic diagram of a support block in an embodiment of the present application;

[0074] Figure 14 is a schematic diagram of a conical structure in an embodiment of the present application;

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

[0076] Figure 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] Figure 17 is another schematic diagram of a partial structure of another form of a rotating shaft mechanism provided by an embodiment of the present application;

[0078] Figure 18 is Figure 17 is a local enlarged view of E in the middle of the figure;

[0079] Figure 19 is a local structure diagram of the support block cooperating with the base in the embodiment of the application;

[0080] Figure 20 is a local structure diagram of the rotating shaft mechanism without installing the cover plate in the embodiment of the application;

[0081] Figure 21 is a structure diagram of the first swing arm in the embodiment of the application;

[0082] Figure 22 is a structure diagram of the first swing arm in the embodiment of the application from another perspective;

[0083] Figure 23 is a contact point analysis diagram of the base without installing the support block and after installing the support block in the embodiment of the application.

[0084] In the drawings, the meanings of the respective reference numerals are as follows:

[0085] 11, rotating member; 12, shaft seat;

[0086] 100, rotating shaft mechanism; 101, base; 102, first swing arm; 103, connecting piece; 104, first door plate; 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, embedded groove; 115, support main body; 116, guide wing; 117, guide groove; 118, first hole part; 119, second hole part; 120, conical structure; 121, conical hole; 122, first groove wall; 123, second groove wall; 124, opening; 125, vertical part; 126, horizontal part; 127, second swing arm; 128, rotating sub-arm; 129, first sliding groove; 130, sliding part; 131, rotating part; 132, main body structure; 133, sliding wing; 134, first circular arc surface; 135, second circular arc surface; 136, third circular arc surface; 137, fourth circular arc surface; 138, circular arc groove; 139, sliding groove; 140, screwing groove; 141, abutting part; 142, connecting beam;

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

[0088] In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0089] It should be understood that the "multiple" mentioned in the present application refers to two or more than two. In the description of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" in the present application only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, in order to clearly describe the technical solutions of the present application, the same items or similar items with basically the same functions and effects are distinguished by using "first", "second", etc. The skilled in the art can understand that "first", "second", etc. do not limit the quantity and execution order, and "first", "second", etc. also do not necessarily mean different.

[0090] The rotating shaft mechanism and the design method thereof and the electronic device provided by the embodiments of the present application will be explained and described in detail below.

[0091] Please refer to Figures 1 to 3 , Figure 1 is a structural schematic diagram of an electronic device in a folded state provided by the embodiments of the present application, Figure 2 is a structural schematic diagram of an electronic device in a half unfolded state provided by the embodiments of the present application, Figure 3 is a structural schematic diagram of an electronic device in an unfolded state provided by the embodiments of the present application.

[0092] In one or more embodiments, the present application provides an electronic device, which can be a foldable electronic device; the electronic device comprises a shell and a rotating shaft mechanism 100, the shell comprises 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 with the rotating shaft mechanism 100, and the first sub-shell 301 and the second sub-shell 302 can be relatively rotated through the rotating shaft mechanism 100. The exemplary electronic device can be a mobile phone, a tablet computer, a notebook computer or an electronic reader. The foldable electronic device is not only limited to the electronic device with a foldable display screen 200, for example, a mobile phone, but also can be an electronic device with a foldable or unfoldable display screen 200 and a keyboard, for example, a notebook computer. It can be understood that the electronic device can also be an electronic device without a display screen 200. In addition, the electronic device can also be a earphone charging box, the rotating shaft mechanism 100 realizes the hinge connection between the box body and the box cover of the earphone charging box; furthermore, the rotating shaft mechanism 100 can also be a rotating shaft of a notebook computer.

[0093] In the embodiments of the present application, the electronic device is taken as a mobile phone as an example, and the electronic device further includes a display screen 200. The display screen 200 can be a flexible display screen 200, and the display screen 200 is connected to the first sub-housing 301 and the second sub-housing 302 respectively. The first sub-housing 301 and the second sub-housing 302 can include a middle frame of the mobile phone.

[0094] For ease of description, as shown in the drawings, the width direction of the foldable electronic device can be defined as the B-B direction, the length direction of the foldable electronic device can be defined as the A-A direction, and the thickness direction of the foldable electronic device can be defined as the C-C direction. The A-A direction, the B-B direction and the C-C direction are perpendicular to each other to form a rectangular coordinate system. The axial direction of the rotation shaft mechanism 100 is parallel to the A-A direction.

[0095] Figure 1 As shown in the drawings, the foldable electronic device is in a folded state, Figure 2 As shown in the drawings, the foldable electronic device is in a half-opened state, Figure 3 As shown in the drawings, the foldable electronic device is in an opened state. Among them, Figure 2 As shown in the drawings, the opening angle a of the foldable electronic device is 90°, Figure 3 As shown in the drawings, the opening angle β of the foldable electronic device is 180°. The state of the electronic device is the same as that of the rotation shaft mechanism 100, that is, when the foldable electronic device is in a folded state, the rotation shaft mechanism 100 is also in a folded state; when the foldable electronic device is in a half-opened state, the rotation shaft mechanism 100 is also in a half-opened state; when the foldable electronic device is in an opened state, the rotation shaft mechanism 100 is also in an opened state.

[0096] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have a small deviation. For example, Figure 2 As shown in the drawings, the opening angle a of the foldable electronic device is 90°, which means that a can be 90°, or approximately 90°, such as 80°, 85°, 95° or 100°, etc. Figure 3 As shown in the drawings, the opening angle β of the foldable electronic device is 180°, which means that β can be 180°, or approximately 180°, such as 170°, 175°, 185° and 190°, etc. The angles illustrated in the following can be understood in the same way.

[0097] Please refer to Figure 1 and Figure 2As shown in FIG. 1, the first sub-shell 301 and the second sub-shell 302 are respectively mounted on two sides of the rotating shaft 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 folded around an axis parallel to the A-A direction. In this embodiment, the display screen 200 is a flexible display screen, for example, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light emitting diode (QLED) display screen, etc.

[0098] The first sub-shell 301 and the second sub-shell 302 are relatively close to drive the display screen 200 to fold, so that the foldable electronic device is folded. When the foldable electronic device is in the folded state, the foldable part 203 of the display screen 200 is folded, and the first part 201 and the second part 202 are relatively arranged. At this time, the display screen 200 is located between the first sub-shell 301 and the second sub-shell 302, which can greatly reduce the probability of damage to the display screen 200, thereby effectively protecting the display screen 200.

[0099] Please refer to Figure 2 , the first sub-shell 301 and the second sub-shell 302 are relatively rotated through the rotating shaft mechanism 100, and the display screen 200 is unfolded by relatively moving away the first sub-shell 301 and the second sub-shell 302, so that the foldable electronic device is unfolded to a half-unfolded state. When the foldable electronic device is in the half-unfolded state, the first sub-shell 301 and the second sub-shell 302 are unfolded to an angle of a, the first part 201 and the second part 202 are relatively unfolded, and the foldable part 203 is unfolded. At this time, the angle between the first part 201 and the second part 202 is a.

[0100] Please refer to Figure 2 and Figure 3 , the first sub-shell 301 and the second sub-shell 302 are relatively rotated through the rotating shaft mechanism 100, and the display screen 200 is further unfolded by relatively moving away the first sub-shell 301 and the second sub-shell 302, until the foldable electronic device is unfolded. The rotating shaft mechanism 100 can have a damping mechanism to realize the opening and closing feeling and state maintenance during rotation.

[0101] When the electronic device is in the unfolded state, the included angle between the first sub-shell 301 and the second sub-shell 302 is β. The foldable part 203 is unfolded, and the first part 201 and the second part 202 are relatively unfolded. At this time, the included angles between the first part 201, the second part 202 and the foldable part 203 are all β, the display screen 200 has a large display area, realizes large-screen display of the foldable electronic device, and improves the user experience.

[0102] It should be noted that the included angle α and the included angle β are both the included angle between the first sub-shell 301 and the second sub-shell 302, which is only to distinguish the angle between the first sub-shell 301 and the second sub-shell 302 of the foldable electronic device in different states. Among them, the included 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 the half-unfolded state; the included 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 the unfolded state.

[0103] In the embodiment of the present application, referring to Figures 1 to 3 , the mobile phone can be an inner folding screen mobile phone. After folding, 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 another structure schematic diagram of the electronic device in the half-unfolded state provided by the embodiment of the present application; referring to Figure 4 , when the electronic device is a mobile phone, the mobile phone can also be an outer folding screen mobile phone. After folding, the first sub-shell 301 and the second sub-shell 302 are opposite, so that the display screen 200 is exposed.

[0104] Figure 5 is a partial structure schematic diagram of the rotating shaft mechanism in the related art, referring to Figure 5 , the rotating part 11 of the rotating shaft mechanism is rotatably connected with the shaft seat 12 of the rotating shaft mechanism, and the rotating part 11 is in an unfolded state relative to the shaft seat 12; and when the rotating part 11 is in the unfolded state relative to the shaft seat 12, the parts of the flexible display screen fixedly connected with the middle frame are substantially in the same plane, which can be called as the flat state of the flexible display screen. However, as the rotating shaft mechanism and the middle frame become thinner and thinner, and the machining process has a precision limit, that is, the machining precision of the rotating part 11 and the shaft seat 12 is limited, so after the rotating part 11 and the shaft seat 12 are matched, it is impossible to guarantee the tolerance band requirement of the flat angle in the flat state, resulting in a low yield of the electronic device or the rotating shaft mechanism, and a large flat angle threshold, which affects the user experience.

[0105] To solve the problems in the related art, the embodiment of the present application further provides a rotating shaft mechanism 100, and improves user experience and optimizes the design of the unfolding angle.

[0106] Figure 6 is a structural schematic diagram of the rotating shaft mechanism 100 provided by the embodiment of the present application; Figure 7 is a structural schematic diagram of the rotating shaft mechanism 100 from another perspective provided by the embodiment of the present application; in one or more embodiments, the rotating shaft mechanism 100 includes a base 101, a connecting piece 103 and a first door plate 104; the first door plate 104 is rotationally connected with the base 101, and the first door plate 104 is also rotationally connected with the connecting piece 103; for example, Figure 6 and Figure 7 The outer rotating shaft mechanism 100 shown in the drawings can be applied to an outer folding screen mobile phone; the number of the connecting pieces 103 is two, and the number of the first door plates 104 is two; the two connecting pieces 103 are respectively arranged on the opposite sides of the base 101, and the two first door plates 104 are respectively arranged on the opposite sides of the base 101; the first door plate 104 is located between the base 101 and the connecting piece 103; one of the connecting pieces 103 is used for fixed connection with the first sub-housing 301, and the other connecting piece 103 is used for fixed connection with the second sub-housing 302. The first door plate 104 is used for supporting the foldable part 203 of the display screen 200 when the electronic device is folded. It should be noted that the rotating shaft mechanism 100 provided by the embodiment of the present application is not limited to be applied to the outer folding screen mobile phone, but can also be applied to an inner folding screen mobile phone; in addition, it can also be applied to other possible scenarios, such as a sliding door with a rotating shaft accessory.

[0107] Figure 8 is a partial structural schematic diagram of the rotating shaft mechanism 100 provided by the embodiment of the present application, Figure 9 is a sectional view of the partial structure of the rotating shaft mechanism 100 in the embodiment of the present application; in combination with Figure 8 and Figure 9As shown, in some embodiments, the rotating shaft mechanism 100 further comprises a first swing arm 102 and a support block 105; the first swing arm 102 is rotationally connected with the base 101, and the first swing arm 102 can rotate relative to the base 101 between an unfolded position and a folded position; when the first swing arm 102 is in the unfolded position, an angle between the first swing arm 102 and the base 101 is a flattening angle; the support block 105 is located on the base 101, and the support block 105 is rigidly connected with 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; 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 change in 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 rotating shaft mechanism 100 in the embodiments of the present application, the flattening angle is adjusted by changing the position of the second contact surface 107 of the support block 105, so that when the first swing arm 102 and the base 101 are designed, the machining precision of the first swing arm 102 and the base 101 can be moderately reduced, and the first swing arm 102 and the base 101 can be designed in an over-expansion form, i.e., the flattening angle is greater than 180°, to reduce the machining precision of the two, so as to reduce the error requirement of the two when they are matched in the flattening state; after being designed in the over-expansion form, the range of the flattening angle is greater than 180° and not greater than 190°, so that the support block 105 is facilitated to be adjusted, and after being designed in the over-expansion form, the specific value of the unfolding angle can be 184°, 185° or 186°, etc., and of course, the flattening angle after over-expansion can also be a range. The support block 105 is installed on the base 101, and the support block 105 and the base 101 are rigidly connected, so that 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 unfolded position can be conveniently adjusted, and the flattening angle can meet the preset angle requirement, that is, the present application can adjust the flattening angle between the first swing arm 102 and the base 101 to meet the tolerance band requirement of the flattening state by the support block 105 under the condition that the machining precision of the first swing arm 102 and the base 101 is moderately reduced.When the unfolding angle meets the preset angle requirement, the rigidity connection between the base 101 and the support block 105 ensures the stability of the first swing arm 102 in the unfolded position, so that the second contact surface 107 exerts a force on the first contact surface 106 at the moment when the first contact surface 106 and the second contact surface 107 abut against each other, and the force can be directly transmitted to the first swing arm 102. However, since the first swing arm 102 is still rotationally connected to the base 101, 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 the short period of over-expansion, thereby ensuring that the display screen 200 on the electronic device will not be pulled or squeezed due to over-expansion, ensuring the reliability of the electronic device and improving the yield of the electronic device or the pivot mechanism 100.

[0108] It should be noted that over-expansion means that the pivot mechanism 100 is excessively unfolded in the unfolding direction. When the electronic device is an inner folding screen mobile phone, over-expansion will cause the display screen 200 to be pulled. When the electronic device is an outer folding screen mobile phone, over-expansion will cause the display screen 200 to be squeezed.

[0109] In some embodiments, the support block 105 is a block structure, which can also be referred to as a plate structure, and has a certain thickness. The support block 105 has relatively large 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 B-B direction, and the first contact surface 106 is an end surface in the thickness direction of the support block 105. In an 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 made of a metal material with high wear resistance and hardness, such as 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 can be a movement of the support block 105 relative to the base 101 to change the unfolding angle and adjust the unfolding angle to be within the preset angle range. In other embodiments, the change in the position of the second contact surface 107 on the base 101 can also be an increase or decrease in the thickness of the support block 105 to change the unfolding angle and adjust the unfolding angle to be within the preset angle range. The increase or decrease in the thickness of the support block 105 can be achieved by replacing the support block 105 with a different thickness. Whether the position of the support block 105 is moved or the thickness of the support block 105 is increased, the rigidity connection between the support block 105 and the base 101 needs to be maintained during adjustment, which can more accurately measure whether the unfolding angle is within the preset angle range.

[0111] In some embodiments, when the first swing arm 102 is in the unfolded position, the second contact surface 107 is configured to be able to move towards the direction where the first contact surface 106 is located, so as to adjust the unfolding angle. Since the first swing arm 102 is rotationally connected with the base 101, and when the first swing arm 102 is in the unfolded position, the first contact surface 106 abuts against the second contact surface 107, when the position of the second contact surface 107 is changed so as to move towards the direction where the first contact surface 106 is located, the first swing arm 102 will rotate by a certain angle, so as to change the unfolding angle, thereby facilitating the unfolding angle to be located in the preset angle range.

[0112] It should be noted that, for the adjustment of the unfolding angle, in order to facilitate the measurement of the unfolding angle, in the embodiments of the present application, the movement of the second contact surface 107 is mainly realized when the first swing arm 102 is in the unfolded position, so as to adjust the unfolding angle; or the movement of the second contact surface 107 can also be realized when the first swing arm 102 is in other positions, for example, when the first swing arm 102 is in the folded position or the half-unfolded position, etc. For example, the support block 105 moves along the first direction, the first direction is perpendicular to the axial direction of the base 101, i.e. the first direction is perpendicular to the A-A direction; the first direction is parallel to the width direction of the base 101, i.e. the first direction is parallel to the B-B direction.

[0113] In some embodiments, the position of the first swing arm 102 on the rotation shaft mechanism 100 is close to the end of the axial direction of the rotation shaft mechanism 100, so as to facilitate the arrangement of the first contact surface 106 on the first swing arm 102 and the arrangement of the second contact surface 107 on the base 101, and facilitate the measurement of the unfolding 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 rotation shaft mechanism 100.

[0114] In some embodiments, when the support block 105 is rigidly connected with the base 101, the support block 105 and the base 101 can be directly connected or indirectly connected. When the support block 105 is rigidly connected with the base 101, the stability of the connection between the support block 105 and the base 101 can be ensured. For example, as shown in Figure 9 the support block 105 and the base 101 are rigidly connected in a direct contact manner.

[0115] In some embodiments, for ease 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 each be a plane; theoretically, when the first reference surface 108 and the second reference surface 109 are parallel, the flattening angle η is 180°; and the angle formed between the first reference surface 108 and the second reference surface 109 satisfies a 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: δ min ≤η≤δ max δ min Less than or equal to δ max Where 175°≤δ min ≤180°, 180°≤δ max ≤185°, for example, 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 endpoint values ​​δ of the preset angle range... min and δ max The location can also be determined according to actual design needs. For example, the second reference surface 109 can be located on the cover plate 111, and the second reference surface 109 can be perpendicular to the CC direction. Of course, in some other possible cases, the second reference surface 109 can also be located on the middle beam 110.

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

[0117] It should be noted that, in some other possible cases, the support block 105 may also be set on the first swing arm 102 or on the cover plate 111; when the support block 105 is set 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] Figure 10 This is another schematic diagram of a partial structure of the rotating shaft mechanism 100 provided in the embodiments of this application. Figure 10 Only one first door panel 104 is shown in the image; as shown Figure 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 base 101 in the width direction, so that the first swing arm 102 is in abutment with the support block 105. The middle beam 110 has opposite first side surfaces 112, and the support block 105 is arranged on the first side surface 112, so that the support block 105 is arranged on the first side surface 112, so as not to affect the connection of the cover plate 111 and the middle beam 110, and to facilitate the installation and fixation of the support block 105, and to facilitate the adjustment of the unfolding angle by using the support block 105.

[0119] Figure 11 is another schematic view of the partial structure of the rotating shaft mechanism 100 provided by the embodiment of the present application, Figure 12 is Figure 11 is a partial enlarged view at D, Figure 11 only one first door panel 104 is shown; in combination with Figure 10 , Figure 11 and Figure 12 As shown, in some embodiments, the middle beam 110 has an embedded groove 114 located on the first side surface 112; the support block 105 is installed in the embedded groove 114. Since the middle beam 110 has a certain length, thickness and width, it is convenient to arrange the embedded groove 114 for embedding the support block 105 thereon, so that after the support block 105 is installed, the support block 105 does not affect the original performance of the base 101, and the embedded groove 114 can also better limit the support block 105, and facilitate the realization of the rigid fixed connection between the support block 105 and the middle beam 110. The shape of the embedded groove 114 can be matched with the support block 105, and the side of the embedded groove 114 facing the first contact surface 106 of the first swing arm 102 is in the form of an opening 124, so as to facilitate the abutment of the first contact surface 106 of the first swing arm 102 and the second contact surface 107 of the support block 105.

[0120] Figure 13 is a structural schematic view of the support block 105 in the embodiment of the present application; in combination with Figure 12 and Figure 13As shown, in some embodiments, the support block 105 comprises a support body 115 and guide wings 116 arranged on opposite sides of the support body 115, the guide wings 116 being fixedly connected with the support body 115; the embedded slot 114 has guide grooves 117 on opposite slot walls, the guide wings 116 being slidingly limited in the guide grooves 117, so that the cooperation of the guide wings 116 and the guide grooves 117 can ensure the movement of the support block 105 in a preset direction, i.e. the movement of the support block 105 in the direction of the first contact surface 106, thereby facilitating the accurate adjustment of the movement distance of the support block 105 relative to the base 101, so that the flattening angle can be more accurately adjusted to meet the preset angle range. For example, after the guide wings 116 are limited in the guide grooves 117, the support block 105 can move in the first direction, but cannot be removed from the guide grooves 117 in the C-C direction.

[0121] In some embodiments, the rotating shaft mechanism 100 further comprises a driving member for driving the movement of the support block 105 to change the position of the second contact surface 107 on the base 101, so that the adoption of the driving member is conducive to the accurate adjustment of the movement of the support block 105, thereby improving the accuracy of the adjustment of the flattening angle.

[0122] In combination Figure 12 and Figure 13 As shown, in some embodiments, the middle 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 being capable of being combined to form a tapered hole 121, and the first hole portion 118 and the second hole portion 119 can be two parts formed by dividing the tapered hole 121 with a plane parallel to the axial direction of the tapered hole 121.

[0123] Figure 14 is a schematic view of the tapered structure 120 in the embodiments of the present application; in combination Figure 12 , 13 and Figure 14 As shown, the driving member comprises a tapered structure 120, the tapered structure 120 having a conical external thread, and the tapered hole 121 having a conical internal thread matched with the conical external thread; the tapered structure has a screwing 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, and the cooperation of the screwdriver and the screwing groove 140 can realize the movement of the tapered structure in the tapered hole. Please return Figure 9As shown, when the first swing arm 102 is in the unfolded position, the cone structure 120 is configured to move the support block 105 in the process of gradually rotating 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. In this way, by matching the conical internal thread in the tapered hole 121 with the conical external thread on the cone structure 120, the movement of the support block 105 can be facilitated to move the second contact surface 107 in the direction of the first contact surface 106, thereby facilitating the improvement of the accuracy of the flat angle adjustment. For the conical external thread, after the external thread is arranged on the surface of the cone structure 120, since the shape of the cone structure 120 is conical, the external thread is referred to as a conical external thread. For the conical internal thread, after the internal thread is arranged on the inner wall of the tapered hole 121, since the shape of the tapered hole 121 is conical, the internal thread is referred to as a conical internal thread.

[0124] Figure 15 is a schematic view of another form of the partial structure of the rotation shaft mechanism 100 provided by the embodiments of the present application; Figure 16 is a sectional view of another form of the partial structure of the rotation shaft mechanism 100 in the embodiments of the present application; in combination with Figure 15 and Figure 16 As shown, in some other embodiments, the number of support blocks 105 is multiple, and the thicknesses of the multiple support blocks 105 are arranged in an arithmetic sequence. In this way, after arranging multiple support blocks 105 with different thicknesses, the multiple support blocks 105 can be installed on the base 101 one by one for the adjustment of the flat angle, that is, when a support block 105 is installed on the base 101, the flat angle is measured, and when the preset angle range is not met, 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 each time, the flat angle can be conveniently adjusted. Since the thicknesses of the support blocks 105 are different, the position of the second contact surface 107 on the base 101 changes after the support block 105 is installed on the base 101. For example, when the first swing arm 102 is in the unfolded position, replacing the support block 105 with different thicknesses facilitates the movement of the second contact surface 107 in the direction of the first contact surface 106. Exemplarily, the number of support blocks 105 can be 4, 5 or 6, and the tolerance is 0.01 mm, that is, when the thicknesses of the multiple support blocks 105 are arranged from small to large, the difference between two adjacent support blocks 105 with different thicknesses is 0.01 mm, so as to realize the gradient change of the thicknesses of the multiple support blocks 105. Of course, the tolerance can also be designed according to actual needs. The support block 105 can be machined by a CNC (Computer Numerical Control).

[0125] Figure 17is another schematic view of a partial structure of the rotation shaft mechanism 100 in another form provided by an embodiment of the present application, Figure 18 is Figure 17 is a partial enlarged schematic view at E in Figure 17 only one first door panel 104 is shown in Figure 17 and Figure 18 As shown in the figure, since the side of the embedding groove 114 facing the first contact surface 106 of the first swing arm 102 is in an open form, when different supporting blocks 105 are replaced, the position of the second contact surface 107 on the base 101 changes, i.e. the position in the first direction changes. When the unfolding angle is adjusted by using a plurality of different supporting blocks 105, after the rotation shaft mechanism 100 is assembled to be in an unfolded state, the supporting block 105 with the smallest thickness can be first installed on the middle beam 110, and whether another supporting block 105 needs to be replaced is determined according to the measurement result of the unfolding angle; when a certain supporting block 105 is installed, the unfolding angle is located in a preset angle range, and the supporting block 105 is fixedly connected with the middle beam 110. Exemplarily, in the first direction, i.e. the width direction of the middle beam 110, the embedding groove 114 has opposite first groove walls 122 and second groove walls 123, the first groove walls 122 are opposite to the second contact surface 107, and the second groove walls 123 are opposite to the second contact surface 107; the embedding groove 114 has two first groove walls 122, the two first groove walls 122 are arranged 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 of the first contact surface 106 and the second contact surface 107; the first groove walls 122 and the second groove walls 123 are arranged to prevent the supporting block 105 from moving out in the width direction of the middle beam 110; the width direction of the middle beam 110 is parallel to the B-B direction, and the length direction of the middle beam 110 is parallel to the A-A direction.

[0126] In some embodiments, when the flattening angle is within the preset angle range, the support block 105 is fixedly connected with the base 101, and the second contact surface 107 is kept relatively fixed with the base 101, so that when the flattening angle meets the preset angle range, the support block 105 is fixed with the base 101, so as to realize that the flattening angle is not easy to change during use. For example, the support block 105 and the base 101 are fixedly connected by welding; thus, after adjusting the flattening angle by using the support block 105, the support block 105 and the base 101 are fixed by welding, thereby realizing the rigid connection of the two, which improves the stability of the overall structure formed by the support block 105 and the base 101, and ensures that the overall structure is not easy to deform or loosen when bearing external load or being impacted. In addition, because of the rigid connection, better stress transmission is formed between the support block 105 and the base 101, so that the components can better share the load, thereby prolonging the service life of the overall structure. Secondly, after adjusting the flattening angle by 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 not only can reduce production cost, but also can simplify the assembly process and improve production efficiency. Furthermore, welding can ensure the relative position between the two, thereby ensuring the accuracy. Finally, because of the strong connection by welding, the connection between the support block 105 and the base 101 is not easy to damage, thereby reducing the need for daily maintenance and repair.

[0127] Figure 19 is a schematic view of a partial structure of the support block 105 and the base 101 in the embodiments of the present application, and in still other embodiments, the support block 105 includes a vertical part and a transverse part 126, and the second contact surface 107 is located on the vertical part, and the transverse part 126 extends in the thickness direction of the vertical part, which is parallel to the width direction of the middle beam 110 (or the width direction of the base 101). Thus, the transverse part 126 is used to facilitate the welding and fixing between the support block 105 and the base 101, for example, when the embedded groove 114 is arranged on the middle beam 110, the transverse part 126 can be used to better realize the welding and fixing between the support block 105 and the middle beam 110, and can reduce the influence on the already adjusted flattening angle during welding and fixing.

[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. This allows the shapes of the first contact surface 106 and the second contact surface 107 to be determined according to actual design needs. The curved surface can be an arc surface or a spherical cap, etc. For example, the first contact surface 106 is a plane, and the second contact surface 107 is a plane. Using planes for both the first contact surface 106 and the second contact surface 107 facilitates the machining of the planes and allows for easier achievement of the preset flattening angle range using the support block 105, while ensuring adjustment accuracy.

[0129] It should be noted that in some other possible embodiments, at least one of the first contact surface 106 and the second contact surface 107 may also be a curved surface; alternatively, one of the first contact surface 106 and the second contact surface 107 may be a convex surface, and the other may be 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] Figure 20 This is a partial structural diagram of the rotating shaft mechanism 100 without the cover plate 111 installed in the embodiments of this application. See [link / reference]. Figure 20 As shown, in some embodiments, the rotating shaft mechanism 100 further includes a second swing arm 127, one end of which is rotatably connected to the base 101, and the other end of which is rotatably connected to the connector 103. 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, each rotating sub-arm 128 being arc-shaped. 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 first sliding grooves 129 that cooperate with the rotating sub-arms 128. The first sliding grooves 129 are arc-shaped, limiting the rotating sub-arms 128 within the first sliding grooves 129 to prevent them from dislodging, but allowing the rotating sub-arms 128 to rotate within the first sliding grooves 129 around an axis parallel to the AA direction. The middle beam 110 also has a second side surface 113 opposite to the first side surface 112. The cover plate 111 is fixed to the second side surface 113, thus not affecting the connection between the cover plate 111 and the middle beam 110.

[0131] Figure 21 This is a schematic diagram of the structure of the first swing arm 102 in the embodiments of this application. Figure 22 This is a structural schematic diagram of the first swing arm 102 from another perspective in the embodiments of this application; combined with Figure 20 , Figure 21 and Figure 22As shown in some embodiments, the first swing arm 102 comprises a sliding part 130 and a rotating part 131, the sliding part 130 is fixedly connected with the rotating part 131; the rotating part 131 is rotatably connected with the middle beam 110; the rotating shaft mechanism 100 further comprises a connecting piece 103, the sliding part 130 is slidably connected with the connecting piece 103, wherein the connecting piece 103 has a sliding groove 139, the sliding part 130 is limited in the sliding groove 139, and the sliding part 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 which slides with the base 101, after the rotating shaft mechanism 100 is assembled, the position of the supporting block 105 which is adjusted can be exposed outside, thereby facilitating the adjustment and the fixation of the supporting block 105. For example, the sliding part 130 and the rotating part 131 are an integral structure, the sliding part 130 comprises a main body structure 132 and sliding wings 133 located on the opposite sides of the main body structure 132, the sliding wings 133 are slidably arranged 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 be pulled out along the C-C direction; in this way, 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] In combination with Figure 20 , Figure 21 and Figure 22 As shown in some embodiments, the rotating part 131 has opposite first and second circular arc surfaces 134 and 135, so that the rotating part 131 is in the shape of a circular arc, the first circular arc surface 134 is a concave surface, and the second circular arc surface 135 is a convex surface; the first swing arm 102 further comprises an abutting part 141 and a connecting beam 142, the sliding part 130 and the rotating part 131 are fixedly connected through the connecting beam, and the abutting part 141 is fixedly connected with the connecting beam 142; the first contact surface 106 is arranged on the abutting part 141, the first contact surface 106 is away from the first circular arc surface 134, and the first contact surface 106 is close to the second circular arc surface 135. In this way, the first contact surface 106 is arranged on the abutting part 141, which is conducive to making the first contact surface 106 have a proper area, so as to reduce stress when the first contact surface 106 abuts against the second contact surface 107, thereby being conducive to ensuring that the first contact surface 106 or the second contact surface 107 is not prone to wear or being pressed into a pit during long-time use, and thus the flat angle can also meet the preset angle range during long-time use.

[0133] Please return to Figure 9As shown, the base 101 further comprises a cover plate 111 fixedly connected with 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 arranged in the arc groove 138; in this way, the rotating part 131 in arc shape cooperates with the arc groove 138, so that the first swing arm 102 is rotatably connected with the base 101 in a virtual shaft manner, which facilitates the arrangement of the second contact surface 107 on the base 101, the arrangement of the first contact surface 106 on the first swing arm 102, and the abutment of the first contact surface 106 and the second contact surface 107.

[0134] In one or more embodiments, the application further provides a design method of the rotating shaft mechanism 100, which is suitable for the rotating shaft mechanism 100 in any embodiment of the application. The electronic device in the embodiment of the application can also use the rotating shaft mechanism 100 designed by the design method of the rotating shaft mechanism 100.

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

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

[0137] rotatably connecting the first swing arm 102 with the base 101, and installing the support block 105 on the base 101, and rigidly connecting the support block 105 with 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 abut, and the angle between the first swing arm 102 and the base 101 is a flattened angle;

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

[0140] after the flattened angle is within the preset angle range, fixedly connecting the support block 105 with the base 101.

[0141] The design method of the rotating shaft mechanism 100 provided in the embodiment of the present application can appropriately reduce the machining precision of the first swing arm 102 and the base 101, and can design the first swing arm 102 and the base 101 in an over-expansion form, i.e., the expansion angle is greater than 180°, to reduce the machining precision of the two, to reduce the error requirement of the two when being expanded. After being designed in the over-expansion form, the expansion angle is greater than 180° and not greater than 190°, so that the support block 105 is convenient to adjust, and the specific value of the expansion angle after being designed in the over-expansion form can be 184°, 185° or 186°, etc. Of course, the expansion angle after being over-expanded can also be a range. The support block 105 is installed on the base 101, and the support block 105 and the base 101 are rigidly connected, so that when the position of the second contact surface 107 of the support block 105 on the base 101 is changed, the expansion angle between the first swing arm 102 and the base 101 when the first swing arm 102 is in the expanded position can be conveniently adjusted, and the expansion angle can meet the preset angle requirement. That is, the embodiment of the present application can appropriately reduce the machining precision of the first swing arm 102 and the base 101, and adjust the support block 105 to make the expansion angle between the first swing arm 102 and the base 101 meet the tolerance band requirement of the expansion state. When the expansion angle meets the preset angle requirement, the base 101 and the support block 105 are rigidly connected, and the support block 105 and the base 101 are fixedly connected, so that the stability of the first swing arm 102 in the expanded position is ensured. Therefore, at the moment when the first contact surface 106 and the second contact surface 107 abut, the second contact surface 107 exerts force on 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, which is conducive to avoiding the short moment of over-expansion, thereby preventing the display screen 200 on the electronic device from being pulled or squeezed due to over-expansion, and ensuring the reliability of the electronic device and improving the yield of the electronic device or the rotating shaft mechanism 100.

[0142] Please refer to Figure 9 In some embodiments, the method of changing the position of the second contact surface 107 on the base 101 includes:

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

[0144] A conical external thread is arranged on a conical structure 120, and the tapered hole 121 has a conical internal thread matched with the conical external thread;

[0145] When the first swing arm 102 is in the unfolded position, the support block 105 can be moved to move the second contact surface 107 in the direction of the first contact surface 106 during the process of gradually rotating the conical structure 120 into the conical hole 121. The change of the position of the second contact surface 107 can be achieved by moving the support block 105 relative to the base 101, which can facilitate the adjustment of the flattening angle.

[0146] Please refer to Figure 16 In some other embodiments, the method of changing the position of the second contact surface 107 on the base 101 includes:

[0147] A plurality of support blocks 105 with different thicknesses are designed, and the plurality of support blocks 105 with different thicknesses are arranged in order of thickness from small to large;

[0148] The plurality of support blocks 105 arranged in order of thickness from small to large are installed on the base 101 one by one 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 on the base 101 is removed, and another support block 105 with a different thickness is installed on the base 101 to change the position of the second contact surface 107 on the base 101;

[0152] The flattening angle is measured again, and it is judged whether the measured flattening angle meets the preset angle range;

[0153] When the measured flattening angle does not meet the preset angle range, the support block 105 with a different thickness is repeatedly replaced and installed, and the measured flattening angle is compared with the preset angle range for judgment until the flattening angle meets the preset angle range. The change of the position of the second contact surface 107 on the base 101 is achieved by replacing the support block 105 with a different thickness, which can more flexibly adjust the flattening angle.

[0154] In the method of changing the position of the second contact surface 107 on the base 101 by using support blocks 105 of different thicknesses, the above-mentioned method of trying to replace support blocks 105 of different thicknesses can be adopted; or the method of 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 can be adopted, which can save the debugging time.

[0155] In yet another embodiment, the method of 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 comprises:

[0156] determining the preset angle range;

[0157] calculating the difference between the flattening angle η when the support block 105 is not installed and the upper limit δ max and the lower limit δ min of the preset angle range, respectively, to obtain a first difference θ min and a second difference θ max , θ min = η- δ max , θ max = η- δ min , wherein the first difference θ min represents the difference between the flattening angle η when the support block 105 is not installed and the upper limit δ max of the preset angle range, and the second difference θ max represents the difference between the flattening angle η when the support block 105 is not installed and the lower limit δ min of the preset angle range;

[0158] calculating the first thickness value, i.e., the minimum thickness value of the support block 105, according to the first difference θ min , and calculating the second thickness value, i.e., the maximum thickness value of the support block 105, according to the second difference θ min , 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 the flattening angle 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] selecting a support block 105 with a suitable thickness so that the thickness of the support block 105 is within the range between the first thickness value and the second thickness value, so that when the support block 105 with the suitable thickness is installed, the flattening angle can be within the preset angle range.

[0160] Figure 23 is a schematic view of the contact point analysis of the base 101 without the installation of the support block 105 and after the installation of the support block 105, which is described with reference to FIG. 1. Figure 23In some embodiments, the first thickness value is calculated according to a first difference θ min In some embodiments, the second thickness value is calculated according to a second difference θ max The second thickness value can be calculated according to the following formula:

[0161]

[0162] wherein, μ represents a first included angle between a line connecting the contact point G between the first swing arm 102 and the cover plate 111 and the contact point F between the first swing arm 102 and the middle beam 110 and a horizontal direction; v represents a second included angle between a line connecting the contact point G between the first swing arm 102 and the cover plate 111 and the contact point F between the first swing arm 102 and the middle beam 110 and the horizontal direction; x represents a thickness value of the support block 105; l1 represents a projection value of the line connecting the contact point G between the first swing arm 102 and the cover plate 111 and the contact point F between the first swing arm 102 and the middle beam 110 in the C-C direction; l2 represents a projection value of the line connecting the contact point G between the first swing arm 102 and the cover plate 111 and the contact point F between the first swing arm 102 and the middle beam 110 in the B-B direction; and θ represents a change amount between the first included angle and the second included angle. When θ is θ min , the corresponding value of δ is δ max ; when θ is θ max , the corresponding value of δ is δ min ; l1 and l2 can be measured, and the first difference θ min and the second difference θ max are substituted into the above formula to obtain the respective corresponding value of x, i.e., the respective corresponding 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, i.e., 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, i.e., 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 also 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 cuboid, etc., there can be a case where the line connecting F1 and F2 is parallel to the B-B direction. In addition, the above calculation formula is only one embodiment, and other calculation methods can also be used to calculate the thickness of the support block. When the first swing arm 102 is in the unfolded position relative to the base 101, the first swing arm 102 exerts force on the base 101 similar to a lever exerting force on a fulcrum, so it can be said that at this time, the first swing arm 102 has a contact point G with the cover plate 111, and the first swing arm 102 has a contact point F with the middle beam 110 (see FIG. 6). Figure 16

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

[0165] The support block 105 and the base 101 are fixed by welding; wherein, when the support block 105 is installed on the middle beam 110 of the base 101, the support block 105 and the middle beam 110 are fixed by welding. The fixed connection 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0167] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.​

Claims

1. A hinge mechanism for a foldable electronic device, characterized in that, include: Base; A first swing arm is rotatably connected to the base, and the first swing arm is capable of rotating relative to the base between an unfolded position and a folded position; When the first swing arm is in the extended position, the angle between the first swing arm and the base is the flattening angle; A support block is located on the base and is rigidly connected to the base. The first swing arm has a first contact surface, and the support block has a second contact surface. When the first swing arm is in the extended position, the first contact surface and the second contact surface abut against each other. The second contact surface is configured to change its position on the base so that the flattening angle is within a preset angle range; the base includes a central beam, the first swing arm includes a sliding part and a rotating part, the sliding part is fixedly connected to the rotating part, the rotating part is rotatably connected to the central beam, the rotating shaft mechanism also includes a connecting member, and the sliding part is slidably connected to the connecting member.

2. The rotating shaft mechanism as described in claim 1, characterized in that, When the first swing arm is in the unfolded position, the second contact surface is configured to move in the direction of the first contact surface to adjust the flattening angle.

3. The rotating shaft mechanism as described in claim 2, characterized in that, The central beam has an embedded groove, and the support block is installed in the embedded groove.

4. The rotating shaft mechanism as described in claim 3, characterized in that, The rotating shaft mechanism further includes a driving component for driving the support block to move, thereby changing the position of the second contact surface on the base.

5. The rotating shaft mechanism as described in claim 4, characterized in that, The central beam has a first hole, and the support block has a second hole. The first hole and the second hole can be joined together to form a conical hole. The driving component includes a conical structure having a conical external thread, and the conical hole having a conical internal thread that mates with the conical external thread; When the first swing arm is in the extended position, the conical structure is configured to move the support block as it gradually screws into the conical hole, thereby causing the second contact surface to move in the direction of the first contact surface.

6. The rotating shaft mechanism as described in claim 3, characterized in that, The support block includes a support body and guide wings disposed on two opposite sides of the support body, the guide wings being fixedly connected to the support body; The two opposite walls of the embedded groove have guide grooves, and the guide wing slides within the guide grooves.

7. The rotating shaft mechanism as described in claim 3, characterized in that, The connector has a sliding groove, the sliding part is confined in the sliding groove, and the sliding part is movable along the guiding direction of the sliding groove.

8. The rotating shaft mechanism as described in claim 7, characterized in that, The rotating part has a first arc surface and a second arc surface that are opposite to each other, so that the rotating part is arc-shaped, the first arc surface is concave and the second arc surface is convex; The first swing arm further includes an abutment part and a connecting beam, the sliding part and the rotating part are fixedly connected by the connecting beam, and the abutment part 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 as described in claim 8, characterized in that, The base also 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 mates with the third arc surface, and the second arc surface mates with the fourth arc surface, so that the rotating part is rotatably disposed in the arc groove.

10. The rotating shaft mechanism as described in claim 9, characterized in that, The central beam has a first side and a second side opposite to each other, the embedded groove is disposed on the first side, and the cover plate is fixed on the second side.

11. The rotating shaft mechanism as described in any one of claims 1-3 and 7-10, characterized in that, The number of support blocks is multiple, and the thickness of the multiple support blocks is arranged in an arithmetic sequence.

12. The rotating shaft mechanism as described in any one of claims 1-10, 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 remains relatively fixed to the base.

13. The rotating shaft mechanism as described in claim 12, characterized in that, The support block is welded and fixed to the base.

14. The rotating shaft mechanism as described in any one of claims 1-10, 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 design method for a hinge mechanism, said hinge mechanism for a foldable electronic device, characterized in that, This design methodology includes: A first contact surface and a second contact surface are designed on the first swing arm and the support block, respectively; 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. The base includes a central beam. The first swing arm includes a sliding part and a rotating part. The sliding part is fixedly connected to the rotating part, and the rotating part is rotatably connected to the central beam. The rotating shaft mechanism also includes a connecting member. The sliding part is slidably connected to the connecting member. When the first swing arm is in the extended position, the first contact surface and the second contact surface abut against each other, and the angle between the first swing arm and the base is the flattening angle. Change 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 the preset angle range, the support block is fixedly connected to the base.

16. The design method of the rotating shaft mechanism as described in claim 15, characterized in that, The support block is fixedly connected to the base, including: The support block is welded and fixed to the base.

17. An electronic device, characterized in that, It includes a first sub-shell, a second sub-shell, and a rotating shaft mechanism as described in any one of claims 1-14, or a rotating shaft mechanism designed using the design method of the rotating shaft mechanism as described in 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 as claimed in claim 17, characterized in that, The electronic device also 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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