Rotating shaft assembly and electronic equipment

Abstract

The invention discloses a rotating shaft assembly and electronic equipment. The rotating shaft assembly comprises a base, a first swing arm, a door plate, a connecting block and a limiting piece. One end of the first swing arm is rotatably connected with the base, and the other end is connected with the connecting block. The door plate is slidably connected with the first swing arm. And the limiting piece is arranged on the connecting block and is in sliding connection with the limiting part of the door plate, so that the door plate can be limited. The door plate and the first swing arm can have sufficient lap joint amount, the door plate can be prevented from being separated from the first swing arm, and it can be guaranteed that relative movement between the door plate and the first swing arm is smooth and free of jamming. Meanwhile, the door plate and the connecting block are matched through the limiting part and the limiting piece, so that the door plate and the connecting block can be prevented from being separated from each other, and the position and the rotating state of the door plate can be effectively limited. Therefore, through constraint of the first swing arm and the connecting block, it is guaranteed that the door plate has high rotation precision and stability relative to the base.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, in particular to a rotating shaft assembly and an electronic device. BACKGROUND

[0002] The screen of a foldable electronic device is usually supported by a door plate, and the movement state of the door plate determines the form of the screen during the bending process. The existing door plate usually rotates around part of the connecting block in the rotating shaft assembly. However, with the thinning of electronic devices, the overlap between the door plate and the connecting block decreases, which easily causes the door plate and the connecting block to separate from each other and also easily causes jamming during rotation. SUMMARY

[0003] Therefore, the present application provides a rotating shaft assembly and an electronic device to solve the problem that the door plate easily jams or separates from the connecting block during rotation in the prior art.

[0004] In a first aspect, the present application provides a rotating shaft assembly, comprising: a base, a first swing arm, a door plate, a connecting block and a limiting piece. One end of the first swing arm is rotationally connected to the base, and the first swing arm rotates relative to the base between an unfolded position and a folded position. The door plate is provided with a limiting portion, and the door plate is slidingly connected to the first swing arm. The limiting portion includes a first limiting end and a second limiting end. The connecting block is connected to the end of the first swing arm that is away from the base. The limiting piece is arranged on the connecting block, and the limiting piece is slidingly connected to the limiting portion. When the first swing arm rotates to the unfolded position, the limiting piece is in limiting contact with the first limiting end. When the first swing arm rotates to the folded position, the limiting piece is in limiting contact with the second limiting end.

[0005] The rotating shaft assembly provided by the present application has sufficient overlap between the door plate and the first swing arm, which can prevent the door plate and the first swing arm from separating and ensure smooth relative movement between the door plate and the first swing arm. At the same time, the cooperation between the limiting portion and the limiting piece between the door plate and the connecting block can prevent the door plate and the connecting block from separating from each other, and effectively limit the position and rotation state of the door plate. Thus, the first swing arm and the connecting block constrain the door plate to have high rotation accuracy and stability relative to the base.

[0006] In a possible implementation, the first swing arm is provided with a sliding portion, and the door plate is provided with a sliding cooperation portion. The door plate and the first swing arm are slidingly connected through the cooperation of the sliding cooperation portion and the sliding portion. The structure for sliding cooperation can be formed on the door plate and the first swing arm, which facilitates the connection of the door plate and the first swing arm and is conducive to the thin design of the assembled door plate and first swing arm.

[0007] In a possible implementation, along the width direction of the door plate, the limiting part is arranged at one end of the door plate away from the base, and the sliding fitting part is arranged at one end of the door plate close to the base. It can be understood that, in the case that the door plate rotates by the same angle relative to the base, the path length of the position on the door plate close to the base is smaller than the path length of the position on the door plate away from the base, thereby, by arranging the limiting part at the position away from the base, the length of the limiting part can be designed to be larger, and in the premise that the rotating shaft assembly has the same opening and closing angle, the limiting part can achieve higher angle adjustment accuracy.

[0008] In a possible implementation, the limiting part includes a first protruding part, a through hole or a groove is arranged in the first protruding part, and at least part of the limiting piece is arranged in the through hole or the groove. An avoiding gap is arranged on the connecting block, and at least part of the first protruding part is movably arranged in the avoiding gap when the first swing arm rotates between the unfolded position and the folded position. The limiting piece can be a cylindrical shaft, and at least part of the limiting piece can be arranged in the through hole or the groove. In a direction perpendicular to the through direction of the through hole, or in a direction perpendicular to the depth direction of the groove, the through hole or the groove has a continuously closed inner wall surface, and the limiting piece can contact different parts of the inner wall surface of the through hole or the groove to constrain the movement position of the door plate in different directions, thereby achieving accurate adjustment of the movement position of the door plate. In addition, the avoiding gap can provide movement space for the first protruding part to realize rotation of the door plate, and also facilitate compactness of the structure and thin design of the electronic device.

[0009] In a possible implementation, along the length direction of the door plate, the thickness of the first protruding part is less than or equal to the width of the avoiding gap. In this way, on the one hand, it is beneficial to the installation of the first protruding part into the avoiding gap, and on the other hand, it is beneficial to limiting the first protruding part by the inner wall of the avoiding gap, thereby limiting the door plate and preventing the door plate from shaking in the length direction X.

[0010] In a possible implementation, one of the sliding part and the sliding fitting part is a sliding groove, and the other is a sliding rail, the sliding groove has an opening at one end facing the sliding rail, and at least part of the sliding rail is slidably arranged in the sliding groove through the opening. In this way, the stable and smooth relative movement between the door plate and the first swing arm can be achieved by the cooperation of the sliding groove and the sliding rail.

[0011] In a possible implementation, the sliding groove and the sliding rail both extend along an arc. The arc along which the sliding groove extends corresponds to a circle with a center in a space outside the structure, and when the sliding rail moves along the sliding groove, the sliding rail can rotate around an axis passing through the center of the circle, which can be referred to as a "virtual axis". The arc of the sliding groove and the sliding rail can be designed according to the rotation characteristics of the door panel and the first swing arm to avoid jamming during rotation.

[0012] In a possible implementation, the sliding groove extends along a straight line, so that the structural design of the door panel and the first swing arm is facilitated, assembly is facilitated, and jamming between the door panel and the first swing arm is avoided.

[0013] In a possible implementation, an included angle between a position of the door panel in an unfolded state of the hinge assembly and a position of the door panel in a folded state of the hinge assembly is a first angle value, and an included angle between the first swing arm in the unfolded position and the first swing arm in the folded position is a second angle value. When the first angle value is equal to the second angle value, the sliding groove 312 can extend along a straight line, and the sliding rail 211 can slide along a straight line in the sliding groove 312, that is, only a sliding pair is formed between the door panel 3 and the first swing arm 2, and no rotating pair is formed.

[0014] In a possible implementation, the sliding fitting part of the door panel includes a second protruding part, the sliding groove is arranged on the second protruding part, and the sliding rail is arranged on the first swing arm. The second protruding part can have a large length, so that a sliding groove with a large length can be designed, and the reliability of the cooperation between the sliding groove and the sliding rail can be ensured, and the sliding rail and the sliding groove are prevented from being separated from each other.

[0015] In a possible implementation, the connecting block is provided with a relief hole, and at least part of the second protruding part is accommodated in the relief hole when the first swing arm rotates from the unfolded position to the folded position. The relief hole can provide a space for accommodating the second protruding part, and interference between the second protruding part and the connecting block is avoided, and the compactness of the structure is improved, and a thin design is achieved.

[0016] In a possible implementation, an included angle is formed between an extension direction of the sliding fitting part and an extension direction of the limiting part. The first swing arm, the door panel, and the connecting block rotate relative to the base respectively, but the rotation states of the three are different, and the included angle between the extension direction of the sliding fitting part and the extension direction of the limiting part can avoid interference and jamming between the rotation of the door panel and the rotation of the first swing arm and the connecting block during rotation.

[0017] In a possible implementation, the above-mentioned included angle needs to meet certain angle range requirements. If the value of the included angle is too large or too small, it will affect the posture of the door panel in the folded state, and thus is not conducive to the flexible display screen forming the expected folding mode, for example, it is difficult to form a "water drop shape". In the embodiment, the angle value of the included angle is between 5° and 20°. Wherein, by making the angle value of the included angle in the above range, the first swing arm, the door panel and the connecting block can be ensured to rotate smoothly relative to the base without being stuck, which is conducive to making the flexible display screen form the required folding mode.

[0018] In a possible implementation, the first swing arm is rotationally connected with the connecting block. Wherein, the rotation form of the first swing arm relative to the base and the rotation form of the connecting block relative to the base are inconsistent. During the rotation of the first swing arm, the connecting block and the first swing arm can also produce relative motion, so that the normal unfolding or folding of the flexible display screen can be realized through the rotation of the first swing arm and the connecting block, and the flexible display screen can be prevented from being squeezed or pulled during the unfolding or folding process.

[0019] In a possible implementation, the pivot assembly further includes a second swing arm, one end of the second swing arm is rotationally connected with the base, and the second swing arm is slidingly connected with the connecting block. When the first swing arm rotates from the unfolded position to the folded position, the first swing arm drives the second swing arm to rotate relative to the base through the connecting block, and the second swing arm slides relative to the connecting block. Wherein, by making the second swing arm and the connecting block slidingly connected, the freedom of the connecting block relative to the second swing arm can be limited, and the connecting block will not rotate relative to the second swing arm. By rotationally connecting the connecting block and the first swing arm, the freedom of the connecting block relative to the first swing arm can be limited through the first swing arm. Thus, through the constraint of the first swing arm and the second swing arm, the stable rotation of the connecting block relative to the base can be realized.

[0020] In a possible implementation, a limiting groove is arranged on the connecting block, and an edge of the second swing arm is slidingly arranged in the limiting groove along the length direction of the connecting block. Wherein, the limiting groove can limit the second swing arm to slide only along the width direction of the connecting block, and will not move in other directions, so as to ensure the stability of the relative sliding between the second swing arm and the connecting block, and thus ensure the stability and motion accuracy of the unfolding or folding process of the pivot assembly.

[0021] In a second aspect, the present application provides an electronic device, comprising a first shell, a second shell and the hinge assembly provided in the first aspect of the present application, the first shell and the second shell are respectively arranged on two sides of the hinge assembly, and the first shell and the second shell are respectively rotationally connected with the hinge assembly. The electronic device comprising the hinge assembly provided in the first aspect has similar technical effects as the hinge assembly, which will not be described here.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 is a structural schematic diagram of a foldable electronic device in a state provided by the embodiments of the present application;

[0025] Figure 2 is a structural schematic diagram of the electronic device in a second state shown in the figure; Figure 1

[0026] Figure 3 is a structural schematic diagram of the electronic device in a third state shown in the figure; Figure 1

[0027] Figure 4 is an exploded view of the hinge assembly and the middle frame in the related art;

[0028] Figure 5 is a cross-sectional view of the middle frame at C-C; Figure 4

[0029] Figure 6 is a schematic diagram of the hinge assembly in the related art before the thickness is reduced;

[0030] Figure 7 is a schematic diagram of the hinge assembly in the related art after the thickness is reduced;

[0031] Figure 8 is a cross-sectional view of the middle frame at D-D; Figure 4

[0032] Figure 9 is a structural schematic diagram of the hinge assembly provided by the embodiments of the present application;

[0033] Figure 10 ​​​​An exploded view of a hinge assembly according to an embodiment of the present application;

[0034] Figure 11 A structural schematic view of a first swing arm in a hinge assembly according to an embodiment of the present application;

[0035] Figure 12 A structural schematic view of a door plate in a hinge assembly according to an embodiment of the present application;

[0036] Figure 13 A sectional view of a hinge assembly according to an embodiment of the present application in an unfolded state;

[0037] Figure 14 A state view of a hinge assembly according to another embodiment of the present application when not fully unfolded and folded;

[0038] Figure 15 A sectional view of a hinge assembly according to an embodiment of the present application in a folded state;

[0039] Figure 16 A schematic view of a connecting block and a first swing arm in a hinge assembly according to an embodiment of the present application;

[0040] Figure 17 A Figure 12 A local enlarged view at A in FIG. 10;

[0041] Figure 18 An exploded view of a door plate, a connecting block and a limiting piece in a hinge assembly according to an embodiment of the present application;

[0042] Figure 19 A sectional view of a hinge assembly according to another embodiment of the present application in an unfolded state;

[0043] Figure 20 A state view of a hinge assembly according to another embodiment of the present application when not fully unfolded and folded;

[0044] Figure 21 A sectional view of a hinge assembly according to another embodiment of the present application in a folded state;

[0045] Figure 22 A local exploded view of a hinge assembly according to an embodiment of the present application;

[0046] Figure 23 A structural schematic view of a connecting block in a hinge assembly according to an embodiment of the present application;

[0047] Figure 24 A structural schematic view of a door plate in a hinge assembly according to another embodiment of the present application;

[0048] Figure 25 AFigure 19 Enlarged view at C;

[0049] Figure 26 For Figure 9 Enlarged view at B;

[0050] Figure 27 Side view of the door plate in the hinge assembly provided by the embodiment of the present application;

[0051] Figure 28 Exploded view of the hinge assembly provided by another embodiment of the present application;

[0052] Figure 29 Principle view of the hinge assembly provided by an embodiment of the present application;

[0053] Figure 30 Principle view of the hinge assembly provided by another embodiment of the present application;

[0054] Figure 31 Partial exploded view of the hinge assembly provided by another embodiment of the present application;

[0055] Figure 32 Sectional view of the hinge assembly provided by another embodiment of the present application in an unfolded state;

[0056] Figure 33 State view of the hinge assembly provided by another embodiment of the present application when not completely unfolded and folded;

[0057] Figure 34 Sectional view of the hinge assembly provided by another embodiment of the present application in a folded state.

[0058] Reference signs:

[0059] 100 - hinge assembly;

[0060] 110 - base;

[0061] 120 - door plate;

[0062] 121 - arc-shaped slot;

[0063] 122 - sliding slot;

[0064] 130 - swing arm;

[0065] 131 - pin shaft;

[0066] 140 - connecting block;

[0067] 141 - sliding rail;

[0068] 1411 - edge;

[0069] 200 - middle frame;

[0070] 1000 - electronic device;

[0071] 10 - first shell;

[0072] 20 - second shell;

[0073] 30 - rotating shaft assembly;

[0074] 40 - flexible display screen;

[0075] 1 - base;

[0076] 11 - second cam tooth;

[0077] 2 - first swing arm;

[0078] 21 - sliding part;

[0079] 211 - sliding rail;

[0080] 3 - door panel;

[0081] 31 - sliding fitting part;

[0082] 311 - opening;

[0083] 312 - sliding groove;

[0084] 32 - limiting part;

[0085] 321 - first limiting end;

[0086] 322 - second limiting end;

[0087] 33 - first protruding part;

[0088] 34 - second protruding part;

[0089] 4 - connecting block;

[0090] 41 - avoiding gap;

[0091] 42 - avoiding hole;

[0092] 43 - limiting groove;

[0093] 5 - second swing arm;

[0094] 51 - first cam tooth;

[0095] 6 - limiting member. DETAILED DESCRIPTION

[0096] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below in combination with the drawings.

[0097] It should be noted that the described embodiments are merely some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0098] The terms used in the embodiments of the present application are merely for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0099] It should be understood that the term "and / or" used herein only describes an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0100] In the description of the present application, unless otherwise expressly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" means two or more; the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0101] The embodiment provides a hinge assembly which can be applied to a foldable electronic device, which can be referred to as user equipment (UE) or terminal, etc., for example, the electronic device can be a portable android device (PAD), a personal digital assistant (PDA), a handheld device with a wireless communication function, a computing device, a vehicle-mounted device, a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical treatment, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or the like mobile terminal or fixed terminal. The form of the electronic device is not limited in the embodiment of the application.

[0102] In the embodiment of the application, the electronic device is taken as a handheld device with a wireless communication function. The handheld device with a wireless communication function can be a folding screen device. The folding screen device can be a foldable mobile phone including a foldable flexible display screen. The flexible display screen is used to display images, videos and the like. The flexible display screen can be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode screen, a quantum dot light emitting diode (QLED) screen, a liquid crystal display (LCD) and the like. The type of the flexible display screen is not limited in the embodiment.

[0103] Figure 1 is a structural schematic diagram of a foldable electronic device 1000 in a state, Figure 1 Exemplarily, the folding state of the foldable electronic device 1000 is shown.

[0104] Figure 2 is Figure 1 is a structural schematic diagram of the electronic device 1000 in a second state,Figure 2 An unfolded state of the foldable electronic device 1000 is exemplarily shown.

[0105] Figure 3 is Figure 1 A structural schematic view of the electronic device 1000 in a third state is shown, Figure 3 A process state of the foldable electronic device 1000 when folding or unfolding at a certain position between the folded state and the unfolded state is exemplarily shown.

[0106] For ease of description, it is defined that Figure 2 The width direction of the electronic device 1000 is the X-axis direction, the length direction of the electronic device 1000 is the Y-axis direction, and the thickness direction of the electronic device 1000 is the Z-axis direction. The extension direction of the rotation axis of the electronic device 1000 is parallel to the Y-axis direction. That is, the electronic device 1000 can be relatively unfolded or relatively folded around the Y-axis direction.

[0107] It should be noted that the parallel and perpendicular and other relative positional relationship limiting words mentioned in the embodiments of the present application are relative to the current process level, and are not strictly defined in the mathematical sense, and a small amount of deviation is allowed, and approximately parallel and approximately perpendicular can be used. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B is between 0 degrees and 10 degrees. For example, A is perpendicular to B, which means that A and B are perpendicular or approximately perpendicular, and the included angle between A and B is between 80 degrees and 100 degrees.

[0108] It should be understood that the electronic device shown in the embodiments of the present application is a terminal that can be folded once. In other embodiments, the electronic device can also be a terminal that can be folded multiple times (more than twice). At this time, the electronic device can include multiple parts, and adjacent two parts can be relatively close to be folded to the electronic device in a folded state, and adjacent two parts can also be relatively away from being unfolded to the electronic device in an unfolded state.

[0109] As Figure 3As shown, the electronic device 1000 provided in this application embodiment may include a first housing 10 and a second housing 20, wherein the first housing 10 and the second housing 20 can be a mid-frame, which is the main skeleton of the electronic device 1000 and can support various electronic devices and other components. The first housing 10 and the second housing 20 are respectively disposed on both sides of the pivot assembly 30 provided in this application embodiment, and both can be rotated through the pivot assembly 30. The flexible display screen 40 can simultaneously cover the first housing 10 and the second housing 20. During rotation, the first housing 10 and the second housing 20 can drive the flexible display screen 40 to bend, fold, or unfold. In the folded state, the flexible display screen 40 can be bent into a U-shape, teardrop shape, or other folded shapes.

[0110] For foldable electronic devices such as foldable phones, the switching between folded and unfolded states is usually achieved through a hinge assembly. Figure 4 An exploded view of the mating of the pivot assembly 100 and the middle frame 200 in the related art, such as... Figure 4 As shown, in related technologies, the hinge assembly 100 may include a base 110, a door panel 120, a swing arm 130, and a connecting block 140. The connecting block 140 can be connected to the mid-frame 200 of the electronic device and can move synchronously with the mid-frame 200. The base 110 may integrate shaft-like parts, damping structures, etc., and the swing arm 130 can rotate relative to the base 110. The door panel 120 is movably connected to both the swing arm 130 and the connecting block 140, and the door panel 120 can rotate relative to the base 110 through the movement of the swing arm 130, thus supporting the screen. In related technologies, when the electronic device is flattened or folded by external force, the door panel 120, as a structure that directly supports the screen, can cause corresponding parts of the screen to fold or flatten. Therefore, the state of the door panel 120 during movement directly affects the shape of the screen during bending.

[0111] Figure 5 for Figure 4 The sectional view at CC, as shown Figure 5As shown, in the related art, the door plate 120 and the connecting block 140 can be movably connected in a manner that the sliding rail 141 cooperates with the arc-shaped slot 121, for example, the door plate 120 has the arc-shaped slot 121, and the connecting block 140 has the sliding rail 141. In order to realize the folding movement of the electronic device, the sliding rail 141 and the arc-shaped slot 121 are arc-shaped and matched with each other, at least part of the sliding rail 141 can be inserted into the arc-shaped slot 121 and can slide along the arc-shaped slot 121. The arc-shaped slot 121 has a corresponding axis outside the structure, which can also be referred to as a virtual axis, and the door plate 120 can rotate around the virtual axis through the cooperation of the arc-shaped slot 121 and the sliding rail 141. When the electronic device moves between the unfolded state and the folded state, the length of the part of the sliding rail 141 inserted into the arc-shaped slot 121 changes, that is, the overlapping amount of the sliding rail 141 and the arc-shaped slot 121 changes. When the electronic device is in the unfolded state, the length of the part of the sliding rail 141 inserted into the arc-shaped slot 121 is the smallest, and when the electronic device is in the folded state, the length of the part of the sliding rail 141 inserted into the arc-shaped slot 121 is the largest.

[0112] However, with the thin design of the electronic device, the thickness of the electronic device is becoming smaller and smaller, and the thickness of the door plate 120 and the connecting block 140 will also decrease accordingly, and it is difficult to design a long arc-shaped slot 121 on the door plate 120 at the position matched with the connecting block 140. Figure 6 For a schematic view of the hinge assembly before the thickness is reduced in the related art, as shown in FIG. 1A, Figure 6 As shown, when the thickness of the electronic device is not reduced, the hinge assembly has a large thickness H1, a long arc-shaped slot 121 can be designed on the door plate 120, and the sliding rail 141 of the connecting block 140 and the arc-shaped slot 121 of the door plate 120 have a large overlapping amount d1, wherein the "overlapping amount" is the length of the sliding rail 141 inserted into the arc-shaped slot 121. Figure 7 For a schematic view of the hinge assembly after the thickness is reduced in the related art, as shown in FIG. 1B, Figure 7 As shown, after the thickness of the electronic device is reduced, the hinge assembly has a small thickness H2, and it is difficult to design a long arc-shaped slot 121 on the door plate 120, and in the case of ensuring the movement amount of the sliding rail 141 in the arc-shaped slot 121, only the overlapping amount between the sliding rail 141 and the arc-shaped slot 121 can be reduced, that is, the sliding rail 141 and the arc-shaped slot 121 have a small overlapping amount d2, which is easy to cause the door plate 120 and the connecting block 140 to be separated from each other. In addition, due to the reduction of the overlapping amount, when an external force that can make the electronic device fold is applied to the electronic device, as shown in FIG. 1C, Figure 7As shown, the end edge 1411 of the slide rail 141 is prone to getting stuck on the inner wall of the arc groove 121, which in turn causes the electronic device to jam. In addition, as the thickness of the hinge assembly decreases, the space in the thickness direction of the electronic device is compressed, making it difficult for some electronic components in the electronic device to be stacked and connected in the thickness direction. However, after the electronic device is thinned, the area of ​​the electronic device in the direction perpendicular to the thickness remains unchanged. In order to expand the space inside the electronic device, the width of the hinge assembly can be reduced. However, since the overlap between the slide rail 141 and the arc groove 121 is reduced, if the width of the hinge assembly is further reduced, the overlap between the slide rail 141 and the arc groove 121 will be further reduced, which will easily cause the slide rail 141 to detach from the arc groove 121.

[0113] also, Figure 8 for Figure 4 The sectional view at DD, as shown Figure 8 As shown, relative movement can also be achieved between the door panel 120 and the swing arm 130. For example, the door panel 120 is provided with a slide groove 122, and the swing arm 130 is provided with a pin 131. The pin 131 can pass through the slide groove 122 and slide along the slide groove 122. Through the cooperation of the slide groove 122 and the pin 131, as well as the cooperation of the aforementioned slide rail 141 and the arc groove 121, the movement state of the door panel 120 can be constrained, ensuring that the door panel 120 will not detach from the swing arm 130 and sway freely while performing normal movement. In particular, the contact between the pin 131 and the inner wall of the slide groove 122 can limit the posture of the door panel 120 during movement and adjust the movement accuracy of the door panel 120.

[0114] However, with the trend towards thinner designs in electronic devices, it is difficult to achieve a large length for the slide rail 122. This results in a reduced sliding stroke of the pin 131 relative to the slide rail 122, which in turn reduces the adjustment precision of the door panel 120. The door panel 120 is prone to wobbling during rotation, and it is difficult to ensure that the door panel 120 rotates into place when the electronic device is folded, affecting drop reliability. Furthermore, due to the reduced adjustment precision of the door panel 120, if the door panel 120 tilts or fails to rotate into place when the electronic device is unfolded, the screen cannot be effectively supported by the door panel 120. Under stress, the screen is prone to sag, leading to creases and other problems.

[0115] In view of this, embodiments of this application provide a rotating shaft assembly to solve the above-mentioned technical problems.

[0116] Figure 9 This is a schematic diagram of the structure of the rotating shaft assembly provided in the embodiments of this application, as shown below. Figure 9As shown, the rotating shaft assembly 30 comprises a base 1, a first swing arm 2, a door plate 3 and a connecting block 4. The first swing arm 2 can also be referred to as a main swing arm. The base 1 can be integrated with shaft parts, damping structures and the like, one end of the first swing arm 2 is rotationally connected with the base 1, and the first swing arm 2 can rotate relative to the base 1 between an unfolded position and a folded position, the first swing arm 2 can drive the door plate 3 and the connecting block 4 to rotate, so as to realize folding or unfolding of the electronic device.

[0117] Figure 10 An exploded view of the rotating shaft assembly 30 provided by an embodiment of the present application is shown in Figure 10 As shown, the first swing arm 2 is provided with a sliding part 21, the door plate 3 is provided with a sliding cooperation part 31, and the door plate 3 is slidingly connected with the first swing arm 2 through cooperation of the sliding cooperation part 31 and the sliding part 21. The sliding cooperation part 31 and the sliding part 21 extend in a certain direction for a certain length, when the first swing arm 2 rotates, the door plate 3 can be driven by the first swing arm 2 to rotate relative to the base 1, and in the process of rotation, the door plate 3 also slides relative to the first swing arm 2 through cooperation of the sliding cooperation part 31 and the sliding part 21, so as to realize that the flexible display screen can be folded into a U-shaped, drop-shaped or other folding mode.

[0118] In an embodiment, one of the sliding part 21 and the sliding cooperation part 31 can be a sliding groove, and the other can be a sliding rail. For example, the sliding part 21 can be a sliding groove, and the sliding cooperation part 31 can be a sliding rail. Or, the sliding part 21 can be a sliding rail, and the sliding cooperation part 31 can be a sliding groove. Through cooperation of the sliding groove and the sliding rail, stable and smooth relative movement between the door plate 3 and the first swing arm 2 can be realized. For the convenience of description, the sliding part 21 is taken as a sliding rail, and the sliding cooperation part 31 is taken as a sliding groove.

[0119] Figure 11 A structural schematic view of the first swing arm 2 in the rotating shaft assembly provided by an embodiment of the present application is shown in Figure 11 As shown, the sliding part 21 is a sliding rail 211, which can be a structure integrally formed on the first swing arm 2. For example, the sliding rail 211 can be a plate-shaped or block-shaped structure with a certain length. Figure 12 A structural schematic view of the door plate 3 in the rotating shaft assembly provided by an embodiment of the present application is shown in Figure 12 As shown, the sliding cooperation part 31 is a sliding groove 312, which can be a groove-shaped structure integrally formed on the door plate 3. The sliding groove 312 has a certain depth, and the depth direction of the sliding groove 312 forms a certain angle with the thickness direction of the door plate 3.

[0120] As shown in Figure 12As shown, the sliding groove 312 has an opening 311 at one end facing the sliding rail 211, and at least part of the sliding rail 211 is slidingly arranged in the sliding groove 312 through the opening 311. During the rotation of the first swing arm 2 between the unfolded position and the folded position, at least part of the sliding rail 211 extends into the sliding groove 312, thereby ensuring the stability of the relative sliding between the first swing arm 2 and the door panel 3.

[0121] Exemplarily, Figure 13 A cross-sectional view of the hinge assembly in the unfolded state according to an embodiment of the present application is shown in FIG. 2. Figure 13 As shown, when the first swing arm 2 is rotated to the unfolded position, the sliding portion 21 on the first swing arm 2 has a certain overlap amount with the sliding matching portion 31 on the door panel 3, which can ensure the reliable cooperation between the door panel 3 and the first swing arm 2, and prevent the door panel 3 and the first swing arm 2 from being separated from each other.

[0122] Exemplarily, Figure 14 A state diagram of the hinge assembly in an incomplete unfolded and folded state according to another embodiment of the present application is shown in FIG. 3. Figure 14 Exemplarily, a schematic diagram of the hinge assembly at a position between the unfolded position and the folded position is shown to show the cooperation state of the sliding portion 21 and the sliding matching portion 31 during the unfolding or folding of the hinge assembly. As shown in FIG. 4, Figure 14 As shown, the sliding portion 21 can slide relative to the sliding matching portion 31 through the guidance of the inner wall of the sliding matching portion 31.

[0123] Exemplarily, Figure 15 A cross-sectional view of the hinge assembly in the folded state according to an embodiment of the present application is shown in FIG. 5. Figure 15 As shown, when the first swing arm 2 is rotated to the folded position, the sliding portion 21 contacts the bottom of the sliding matching portion 31.

[0124] In this way, even if the hinge assembly has a small thickness, there is still a large overlap amount between the sliding portion 21 and the sliding matching portion 31, thereby avoiding the separation of the door panel 3 and the first swing arm 2, and ensuring the smooth relative sliding between the sliding portion 21 and the sliding matching portion 31.

[0125] In an embodiment, the sliding groove and the sliding rail can both extend along an arc. The center of the arc corresponding to the extension of the sliding groove is in the space outside the structure, and when the sliding rail moves along the sliding groove, it can rotate around an axis passing through the center, which can be referred to as a "virtual axis". The curvature of the sliding groove and the sliding rail can be designed according to the rotation characteristics of the door panel 3 and the first swing arm 2 to avoid jamming during rotation.

[0126] In one embodiment, the aforementioned groove can extend in a straight line, and the groove and the rail form a sliding pair, that is, the groove and the rail only have relative sliding motion and no relative rotational motion, which facilitates the structural design of the door panel 3 and the first swing arm 2, facilitates the assembly, and helps to avoid jamming between the door panel 3 and the first swing arm 2.

[0127] In one embodiment, both the groove and the rail can extend in a straight line, and there may be no gap between the groove and the rail. In another embodiment, the groove can extend in a straight line, the rail can have a slight curvature, and a portion of the rail can contact the inner wall of the groove and slide relative to the groove.

[0128] In one embodiment, such as Figure 15 As shown, when the first swing arm 2 is in the folded position, there is an angle α between the door panel 3 and the connecting block 4. When the angle α is greater than 0, the door panel 3 is tilted between the two first swing arms 2, allowing the flexible display screen to form a "teardrop" shape. When the angle α is 0, the door panel 3 is in a vertical position, allowing the flexible display screen to form a "U" shape.

[0129] The angle between the position of the door panel 3 in the unfolded state of the pivot assembly and the position of the door panel 3 in the folded state of the pivot assembly is a first angle value, which is the angle through which the door panel 3 rotates from the unfolded state to the folded state. The angle between the first swing arm 2 in the unfolded position and the folded position is a second angle value, which is the angle through which the first swing arm 2 rotates from the unfolded state to the folded state. When the first angle value equals the second angle value, the slide groove 312 can extend in a straight line, and the slide rail 211 can slide in a straight line within the slide groove 312. That is, the door panel 3 and the first swing arm 2 only form a sliding pair, not a rotating pair. The slide rail 211 can be straight or slightly curved; both shapes of slide rail 211 can slide in a straight line within the slide groove 312.

[0130] In one embodiment, there may be a slight angle difference between the first angle value and the second angle value. For example, there may be an angle difference of less than 1° between the first angle value and the second angle value, that is, there may be a slight relative rotation between the door panel 3 and the first swing arm 2. In this case, the slide groove may also extend in a straight line, and a certain gap may be reserved between the slide groove and the slide rail. The angle difference is absorbed by the gap, thereby enabling the first swing arm 2 and the door panel 3 to rotate normally relative to the base 1 without jamming.

[0131] Figure 16 This is a schematic diagram showing the cooperation between the connecting block 4 and the first swing arm 2 in the rotating shaft assembly provided in this application embodiment. Figure 16As shown, the connecting block 4 is connected with the first swing arm 2 at the end away from the base 1, and when the first swing arm 2 rotates relative to the base 1, the connecting block 4 can be driven to rotate relative to the base 1. In an embodiment, the connecting block 4 can be rotatably connected with the first swing arm 2, and the rotating form of the first swing arm 2 relative to the base 1 is inconsistent with the rotating form of the connecting block 4 relative to the base 1. During the rotation of the first swing arm 2, relative movement can also be generated between the connecting block 4 and the first swing arm 2, so that the normal unfolding or folding of the flexible display screen can be realized through the rotation of the first swing arm 2 and the connecting block 4 respectively, and the flexible display screen can be prevented from being squeezed or pulled during the unfolding or folding process.

[0132] Figure 17 For Figure 12 As shown in the enlarged view at A, the door plate 3 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 17 For Figure 18 As shown, the connecting block 4 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 18 As shown, the connecting block 4 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 15 As shown, the connecting block 4 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322.

[0133] The limiting part 32 can include a through hole or a groove, and the limiting part 6 can be a cylindrical shaft. At least part of the limiting part 6 can be arranged in the through hole or the groove. In the direction perpendicular to the through direction of the through hole, or in the direction perpendicular to the depth direction of the groove, the through hole or the groove has a continuously closed inner wall surface. The limiting part 6 can be in contact with different parts of the inner wall surface of the through hole or the groove to constrain the movement position of the door plate 3 in different directions, so that the movement position of the door plate 3 can be accurately adjusted.

[0134] As shown in the enlarged view at A, the door plate 3 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 19 As shown in the enlarged view at A, the door plate 3 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 19 As shown, the first swing arm 2 rotates to the unfolded position, and the limiting part 6 is in limiting contact with the first limiting end 321 of the limiting part 32.

[0135] As shown in the enlarged view at A, the door plate 3 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 20 As shown in the enlarged view at A, the door plate 3 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 20 As shown in the enlarged view at A, the door plate 3 is provided with a limiting part 32, and the limiting part 32 includes a first limiting end 321 and a second limiting end 322. Figure 17As shown, the limiting member 6 can be in contact with the inner wall surface of the limiting portion 32 other than the first limiting end 321 and the second limiting end 322, so as to constrain the movement position of the door plate 3 during rotation, thereby adjusting the movement precision of the door plate 3, and further ensuring the position precision of the door plate 3 at the unfolded position and the folded position.

[0136] Exemplarily, Figure 21 A sectional view of the hinge assembly in the folded state according to another embodiment of the present application is shown in FIG. 6. Figure 21 As shown, when the first swing arm 2 rotates to the folded position, the limiting member 6 is in limiting contact with the second limiting end 322.

[0137] Therefore, through the cooperation between the connecting block 4 and the door plate 3 via the limiting portion 32 and the limiting member 6, the hinge assembly can precisely constrain the position of the door plate 3 at the unfolded position, the folded position, and any position between the unfolded position and the folded position, and can prevent the door plate 3 from being separated from the connecting block 4 and the problem of jamming when the door plate 3 and the connecting block 4 move relative to each other, even if the hinge assembly is thinned as a whole.

[0138] The hinge assembly provided by the embodiments of the present application can realize sufficient overlap between the door plate 3 and the first swing arm 2 through the cooperation between the sliding cooperation portion 31 of the door plate 3 and the sliding portion 21 of the first swing arm 2, so as to prevent the door plate 3 from being separated from the first swing arm 2 and ensure smooth relative movement between the door plate 3 and the first swing arm 2. Meanwhile, the cooperation between the door plate 3 and the connecting block 4 via the limiting portion 32 and the limiting member 6 can prevent the door plate 3 from being separated from the connecting block 4, effectively limit the position and rotation state of the door plate 3, and ensure the cooperation state of the door plate 3 and the connecting block 4 even if the width of the hinge assembly is reduced, so as to expand the space in the electronic device by reducing the width of the hinge assembly, which is conducive to the flexible arrangement of the electronic device. Therefore, through the constraint of the first swing arm 2 and the connecting block 4, the door plate 3 can only move relative to the first swing arm 2 and the connecting block 4, thereby ensuring high rotation precision and stability of the door plate 3 relative to the base 1.

[0139] Figure 22 A partial exploded view of the hinge assembly according to one embodiment of the present application is shown in FIG. 5. Figure 22As shown above, along the width direction of the door panel 3, which is consistent with the width direction of the electronic device (both are in the Y direction), the sliding engagement part 31 is disposed on the door panel 3 near the base 1. Since the sliding part 21 and the sliding engagement part 31 are close to the base 1, even if the rotating shaft assembly has a small thickness, there is still a large overlap between the sliding part 21 and the sliding engagement part 31. This prevents the door panel 3 from disengaging from the first swing arm 2 and ensures that the sliding part 21 and the sliding engagement part 31 slide relative to each other without jamming.

[0140] Furthermore, the limiting part 32 is disposed on the end of the door panel 3 away from the base 1. Both the limiting part 32 and the sliding engagement part 31 are disposed on the same side of the door panel 3, and the distance between the limiting part 32 and the base 1 is greater than the distance between the sliding engagement part 31 and the base 1. It can be understood that when the door panel 3 rotates relative to the base 1 by the same angle, the path length of the position on the door panel 3 closer to the base 1 is less than the path length of the position on the door panel 3 farther from the base 1. Therefore, by placing the limiting part 32 away from the base 1, the length of the limiting part 32 can be designed to be larger, and with the same opening and closing angle of the pivot assembly, the limiting part 32 can achieve higher angle adjustment accuracy.

[0141] In one embodiment, Figure 23 This is a schematic diagram of the structure of the connecting block 4 in the rotating shaft assembly provided in the embodiments of this application, as shown below. Figure 23 As shown, the connecting block 4 is provided with a clearance notch 41 and a clearance hole 42. Figure 24 This is a schematic diagram of the structure of the door panel 3 in a pivot assembly provided in another embodiment of this application, as shown below. Figure 24 As shown, the limiting part includes a first protrusion 33, and the first protrusion 33 may be provided with the aforementioned through hole or groove. Figure 25 for Figure 19 A magnified view of the area at point C, as shown below. Figure 25 As shown, when the first swing arm 2 rotates between the unfolded position and the folded position, the first protrusion 33 is movably disposed in the clearance notch 41. In one embodiment, the first protrusion 33 can be a structure integrally formed on the door panel 3.

[0142] In addition, such as Figure 23 As shown, the sliding mating part of the door panel 3 includes a second protrusion 34, on which the aforementioned sliding groove 312 is provided. The second protrusion 34 can be an integrally formed structure on the door panel 3. The second protrusion 34 can have a relatively large length, thereby facilitating the design of a sliding groove 312 with a larger length. This ensures the reliability of the fit between the sliding groove 312 and the slide rail of the first swing arm, preventing the slide rail and the sliding groove 312 from disengaging.

[0143] Among them, such asFigure 25 As shown, taking the through hole provided on the first protrusion 33 as an arc-shaped hole and the limiting member 6 as a cylindrical shaft as an example, the limiting member 6 can be set in the clearance notch 41 and protrude from the inner wall of the clearance notch 41. The limiting part 32 can be slidably sleeved on the limiting member 6. The clearance notch 41 can provide movement space for the first protrusion 33 to realize the rotation of the door panel 3. At the same time, it is also conducive to improving the compactness of the structure and realizing the thin design of electronic devices.

[0144] In one embodiment, along the length direction of the door panel 3, which is consistent with the length direction of the electronic device (both are in the X direction), the thickness of the first protrusion 33 is less than or equal to the width of the clearance notch 41. This facilitates the installation of the first protrusion 33 into the clearance notch 41, and also allows for the limiting of the first protrusion 33 by the inner wall of the clearance notch 41, thereby limiting the door panel 3 and preventing it from wobbling in the length direction X.

[0145] In one embodiment, Figure 26 for Figure 9 The enlarged view at point B, as shown Figure 26 As shown, when the first swing arm 2 rotates from the unfolded position to the folded position, at least a portion of the second protrusion 34 on the door panel 3 is accommodated in the clearance hole 42. The clearance hole 42 provides space to accommodate the second protrusion 34, preventing interference between the second protrusion 34 and the connecting block 4, while also improving structural compactness and achieving a thinner design.

[0146] In one embodiment, Figure 27 This is a side view of the door panel 3 in the pivot assembly provided in this application embodiment, as shown below. Figure 27 As shown, an angle β is formed between the extending direction of the sliding fit part 31 and the extending direction of the limiting part 32. The first swing arm 2, the door panel 3, and the connecting block 4 rotate relative to the base 1, but their rotation states are different. By maintaining an angle β between the extending direction of the sliding fit part 31 and the extending direction of the limiting part 32, interference and jamming between the door panel 3 and the rotation of the first swing arm 2 and the connecting block 4 during rotation can be avoided. For example, Figure 27As shown, the sliding engagement portion 31 can extend along a straight line, and the limiting portion 32 is arc-shaped. The first position is defined by the center of the limiting member at the first limiting end 321 of the limiting portion 32, and the second position is defined by the center of the limiting member at the second limiting end 322 of the limiting portion 32. The extending direction of the line connecting the first and second positions is the extending direction of the limiting portion 32, i.e., the angle between the extending direction of the line connecting the first and second positions and the extending direction of the sliding engagement portion 31 is β. Furthermore, in some other embodiments, both the sliding engagement portion 31 and the limiting portion 32 can extend along a straight line, and the angle between the straight extending directions of the sliding engagement portion 31 and the limiting portion 32 is β.

[0147] The aforementioned included angle β needs to meet certain angle range requirements. If the value of included angle β is too large or too small, it will affect the posture of the door panel 3 in the folded state, which will be detrimental to the formation of the desired folding shape of the flexible display screen, such as making it difficult to form a "teardrop" shape. In this embodiment, the angle value of the aforementioned included angle β can be between 5° and 20°, for example, 5°, 7°, 9°, 12°, 15°, 18°, or 20°. By keeping the angle value of included angle β within the above range, it can be ensured that the first swing arm 2, door panel 3, and connecting block 4 rotate smoothly relative to the base 1 without jamming, which is beneficial for the flexible display screen to form the required folding shape. Of course, in some other embodiments, the angle value of included angle β may also be other values, which are not limited in this embodiment.

[0148] In one embodiment, Figure 28 An exploded view of a rotating shaft assembly provided in another embodiment of this application, as shown below. Figure 28 As shown, the rotating shaft assembly also includes a second swing arm 5, which can also be referred to as an auxiliary swing arm. One end of the second swing arm 5 is rotatably connected to the base 1, and the second swing arm 5 is slidably connected to the connecting block 4. When the first swing arm 2 rotates from the unfolded position to the folded position, the first swing arm 2 drives the second swing arm 5 to rotate relative to the base 1 through the connecting block 4, and the second swing arm 5 slides relative to the connecting block 4.

[0149] in, Figure 29 This is a schematic diagram of a rotating shaft assembly provided in one embodiment of this application, as shown below. Figure 29As shown, the first swing arm 2, the second swing arm 5, the base 1 and the connecting block 4 can be understood as a four-bar linkage mechanism, the first swing arm 2 and the second swing arm 5 can synchronously rotate relative to the base 1, and can drive the connecting block 4 and the door panel 3 to rotate relative to the base 1. The sliding part of the first swing arm 2 can be arc-shaped, and the sliding fitting part on the door panel 3 can also be arc-shaped, the corresponding rotation shaft of the arc-shaped sliding part and the sliding fitting part is located outside the structure of the door panel 3 and the first swing arm 2, which can be called the aforementioned "virtual shaft", the door panel 3 can rotate around the virtual shaft, that is, the arc-shaped sliding part and the sliding fitting part can be equivalent to a rotating pair. The connecting block 4 can rotate relative to the first swing arm 2, and the connecting block 4 slides relative to the second swing arm 5.

[0150] Figure 30 The principle diagram of the rotating shaft assembly provided for another embodiment of the present application is shown in FIG. 4. Figure 30 As shown, the first swing arm 2, the second swing arm 5, the base 1 and the connecting block 4 can be understood as a four-bar linkage mechanism, the first swing arm 2 and the second swing arm 5 can synchronously rotate relative to the base 1, and can drive the connecting block 4 and the door panel 3 to rotate relative to the base 1. The sliding part of the first swing arm 2 can be arc-shaped, and the sliding fitting part on the door panel 3 can also be arc-shaped, the corresponding rotation shaft of the arc-shaped sliding part and the sliding fitting part is located outside the structure of the door panel 3 and the first swing arm 2, which can be called the aforementioned "virtual shaft", the door panel 3 can rotate around the virtual shaft, that is, the arc-shaped sliding part and the sliding fitting part can be equivalent to a rotating pair. The connecting block 4 can rotate relative to the first swing arm 2, and the connecting block 4 slides relative to the second swing arm 5.

[0151] Among them, by making the second swing arm 5 and the connecting block 4 slide connection, it can limit the connecting block 4 to have the freedom of sliding relative to the second swing arm 5, without rotating relative to the second swing arm 5, by connecting the connecting block 4 and the first swing arm 2, the first swing arm 2 can limit the connecting block 4 to have the freedom of rotating relative to the first swing arm 2. Thus, by the constraint of the first swing arm 2 and the second swing arm 5, the connecting block 4 can be stably rotated relative to the base 1.

[0152] Among them, the first swing arm 2, the second swing arm 5, the connecting block 4 and the door panel 3 can be provided with two, and the two first swing arms 2, the two second swing arms 5, the two connecting blocks 4 and the two door panels 3 can be symmetrically arranged on both sides of the base 1.

[0153] Figure 31 The partial exploded view of the rotating shaft assembly provided for another embodiment of the present application is shown in FIG. 4. Figure 31As shown, one end of the second swing arm 5 is provided with a first cam tooth 51, and the base 1 is provided with a second cam tooth 11, and the first cam tooth 51 can be engaged with the second cam tooth 11. When the second swing arm 5 rotates relative to the base 1, the second swing arm 5 drives the first cam tooth 51 to rotate relative to the second cam tooth 11, and during the rotation process, the first cam tooth 51 and the second cam tooth 11 are always in contact. Through the concave-convex design of the first cam tooth 51 and the second cam tooth 11, different damping forces can be generated when the engagement position between the first cam tooth 51 and the second cam tooth 11 changes, so that different hand feelings can be obtained when the electronic device is unfolded or folded to different positions, and the use experience is improved.

[0154] In an embodiment, as Figure 31 shown, the connecting block 4 is provided with a limiting groove 43, and the edge of the second swing arm 5 is slidably arranged in the limiting groove 43 along the width direction of the connecting block 4 (the width direction of the connecting block 4 is the direction in which the connecting block 4 extends to the base 1). The limiting groove 43 can limit the second swing arm 5 to slide only in the width direction of the connecting block 4, and cannot move in other directions, so as to ensure the stability of the relative sliding between the second swing arm 5 and the connecting block 4, and further ensure the stability and movement precision of the shaft assembly during the unfolding or folding process.

[0155] In some embodiments, Figure 32 the shaft assembly provided by another embodiment of the present application is a sectional view in an unfolded state, as Figure 32 shown, the limiting member 6 of the present application can also be an integral structure with the connecting block 4, for example, the limiting member 6 can be a slide rail with a certain curvature, and the slide rail extends in the direction of the door panel 3 by a certain length. Correspondingly, the limiting portion 32 on the door panel 3 can be an arc-shaped slot structure, and at least part of the slide rail can slide in the arc-shaped slot.

[0156] Exemplarily, as Figure 32 shown, in the unfolded state of the shaft assembly, the limiting member 6 and the limiting portion 32 have a certain overlap amount, which can ensure reliable cooperation between the door panel 3 and the connecting block 4, and prevent the door panel 3 and the connecting block 4 from being separated from each other.

[0157] Exemplarily, Figure 33 a state diagram of the shaft assembly provided by another embodiment of the present application when it is not completely unfolded or folded, Figure 33 a schematic view of the shaft assembly at a position between the unfolded position and the folded position is exemplarily shown to show the cooperation state of the limiting member 6 and the limiting portion 32 during the unfolding or folding process of the shaft assembly. As Figure 33 shown, the limiting member 6 can slide relative to the limiting portion 32 through the guidance of the inner wall of the limiting portion 32.

[0158] Exemplarily,Figure 34 A cross-sectional view of the hinge assembly in a folded state according to another embodiment of the present application is shown in FIG. 4. As shown in FIG. 4, when the hinge assembly is rotated to the folded position, the limiting member 6 contacts the bottom of the limiting portion 32, and at this time, the limiting member 6 and the limiting portion 32 have the maximum overlap amount. Figure 34

[0159] In this embodiment, in order to avoid the sliding rail and the arc-shaped slot from being stuck during the sliding process, a larger gap can be provided between the sliding rail and the inner wall of the arc-shaped slot. This gap can avoid the end edge of the sliding rail from being stuck against the inner wall of the arc-shaped slot, so that the normal sliding of the sliding rail can still be ensured in the scenario where the hinge assembly as a whole has a smaller thickness, and the normal unfolding or folding of the electronic device can be realized.

[0160] The above merely provides preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.​

Claims

1. A rotating shaft assembly, characterized in that, The utility model relates to a door hinge, which comprises: a base; a first swing arm, one end of which is rotatably connected to the base, and the first swing arm rotates relative to the base between an unfolded position and a folded position; a door panel, which is provided with a limiting part, and the door panel is slidably connected to the first swing arm; the limiting part comprises a first limiting end and a second limiting end; a connecting block, which is connected to one end of the first swing arm away from the base; a limiting piece, which is arranged on the connecting block and is slidably connected to the limiting part; when the first swing arm rotates to the unfolded position, the limiting piece is in limiting contact with the first limiting end; when the first swing arm rotates to the folded position, the limiting piece is in limiting contact with the second limiting end.

2. The hinge assembly of claim 1, wherein The first swing arm is provided with a sliding part, and the door panel is provided with a sliding matching part; the door panel and the first swing arm are slidably connected through the cooperation of the sliding matching part and the sliding part.

3. The hinge assembly of claim 2, wherein, Along the width direction of the door panel, the limiting part is arranged at one end of the door panel away from the base, and the sliding matching part is arranged at one end of the door panel close to the base.

4. The hinge assembly of claim 1, wherein, The limiting part comprises a first protruding part, and a through hole or a groove is arranged in the first protruding part; at least part of the limiting piece is arranged in the through hole or the groove. The connecting block is provided with a avoiding notch, and at least part of the first protruding part is movably arranged in the avoiding notch when the first swing arm rotates between the unfolded position and the folded position.

5. The hinge assembly of claim 4, wherein, Along the length direction of the door panel, the thickness of the first protruding part is less than or equal to the width of the avoiding notch.

6. The hinge assembly of claim 2, wherein, One of the sliding part and the sliding matching part is a sliding groove, and the other is a sliding rail; the sliding rail has an opening at one end facing the sliding groove, and at least part of the sliding rail is slidably arranged in the sliding groove through the opening.

7. The hinge assembly of claim 6, wherein, The sliding groove extends along a straight line.

8. The hinge assembly of claim 7, wherein, The included angle between the position of the door panel in the unfolded state of the pivot assembly and the position of the door panel in the folded state of the pivot assembly is a first angle value; The included angle between the unfolded position and the folded position of the first swing arm is a second angle value; The first angle value is equal to the second angle value.

9. A hinge assembly according to any one of claims 6 to 8, wherein, The sliding matching part of the door panel comprises a second protruding part, the sliding groove is arranged on the second protruding part, and the sliding rail is arranged on the first swing arm.

10. The hinge assembly of claim 9, wherein, The connecting block is provided with an avoiding hole, and at least part of the second protruding part is arranged in the avoiding hole when the first swing arm rotates from the unfolded position to the folded position.

11. The living hinge assembly of any of claims 1-10, wherein, An included angle is formed between the extension direction of the sliding matching part and the extension direction of the limiting part.

12. The hinge assembly of claim 11, wherein, The angle value of the included angle is between 5° and 20°.

13. The living hinge assembly of any one of claims 1-12, wherein, The first swing arm is rotatably connected to the connecting block.

14. The living hinge assembly of any one of claims 1-13, wherein, The utility model also comprises a second swing arm, one end of which is rotatably connected to the base, and the second swing arm is slidably connected to the connecting block; When the first swing arm rotates from the unfolded position to the folded position, the first swing arm drives the second swing arm to rotate relative to the base through the connecting block, and the second swing arm slides relative to the connecting block.

15. The hinge assembly of claim 14, wherein, The connecting block is provided with a limiting slot, and the edge of the second swing arm is slidably arranged in the limiting slot along the length direction of the connecting block.

16. An electronic device, comprising: The hinge assembly comprises a first shell, a second shell and the hinge assembly according to any one of claims 1-15, the first shell and the second shell are arranged on two sides of the hinge assembly respectively, and the first shell and the second shell are rotationally connected with the hinge assembly respectively.

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