Rotating shaft mechanism, foldable equipment and preparation method of rotating shaft mechanism

Abstract

The invention relates to the field of structure forming, aims to solve the problem that the relative position precision of a swing arm and a door plate of a known rotating shaft mechanism is low, and provides a rotating shaft mechanism, foldable equipment and a preparation method of the rotating shaft mechanism. The rotating shaft mechanism comprises a base and a swing arm door plate piece, and the swing arm door plate piece is rotatably connected to the base; the swing arm door plate piece comprises a first forming part and a second forming part which are integrally formed; a plurality of connecting holes are formed in the first forming part, and a separation part is arranged between every two adjacent connecting holes; the second forming part comprises a main body part and a plurality of connecting parts connected to the main body part, and a separation groove is formed between every two adjacent connecting parts; the multiple connecting parts are formed in the multiple connecting holes respectively, and the separation grooves are matched with the separation parts. The invention has the beneficial effects that the swing arm and the door plate are reliably combined, and the relative position precision is higher.

Description

Technical Field

[0001] The present application relates to the field of structural forming, and in particular, to a hinge mechanism, a foldable device, and a method for preparing the hinge mechanism. Background Art

[0002] The hinge mechanism is the main structure for folding in foldable devices such as foldable phones. The hinge mechanism includes a door panel and a swing arm. The door panel is used to support the flexible screen of the foldable device, and the swing arm is used to form a rotating pair with other structures to achieve relative rotation.

[0003] In some known hinge mechanisms, the door panel and the swing arm are processed and formed separately, and then connected together by welding, bonding, etc. However, the relative position of the swing arm and the door panel in the structure obtained by this processing method is difficult to ensure, which may cause the rotational cooperation between the swing arm and other structures to be stuck, affecting the user experience of the hinge mechanism. Summary of the invention

[0004] The present application provides a rotating shaft mechanism, a foldable device and a method for preparing the rotating shaft mechanism to solve the problem that the relative position accuracy of the swing arm and the door panel in the swing arm door panel of the known rotating shaft mechanism is difficult to ensure.

[0005] In the first aspect, an embodiment of the present application provides a pivot mechanism, comprising a base and a swing arm door panel, the swing arm door panel being rotatably connected to the base; the swing arm door panel comprising a first molded portion and a second molded portion molded as one piece; the first molded portion is provided with a plurality of connecting holes, and a partition portion is provided between adjacent connecting holes; the second molded portion comprises a main body portion and a plurality of connecting portions connected to the main body portion, and a partition groove is provided between adjacent connecting portions; the plurality of connecting portions are respectively molded in the plurality of connecting holes, and the partition grooves cooperate with the partition portions.

[0006] The first molded portion and the second molded portion of the swing arm door panel of the pivot mechanism in this embodiment are molded on both sides of the partition through the spaced connecting portion, and can be shrunk based on the partition respectively, ensuring the accurate relative position of the connecting portion and the door panel, which is beneficial to ensure the structural accuracy of the molded swing arm door panel, ensure the precise fit between the swing arm door panel and the base or other components, and ensure that the pivot mechanism rotates smoothly without jamming.

[0007] In a possible implementation, the side surface of the first forming part facing the second forming part is the first surface, the first surface is provided with a boss, and the connecting hole is located inside the outer contour of the boss. The second forming part has a second surface, the second surface is provided with a groove, and the connecting part is convexly arranged on the bottom surface of the groove. The boss matches the groove, and the projection of the boss and the groove in a plane parallel to the first surface is non-circular.

[0008] In this embodiment, when the first molding part and the second molding part are combined into one, the non-circular boss and the matching limit of the groove can further limit the displacement of the second molding part relative to the first molding part in a plane parallel to the first surface, and limit the rotation of the two around an axis parallel to the first direction. At the same time, the thickness of the first molding part connected to the second molding part is thickened by the boss, which is conducive to improving the structural strength and rigidity of the part and reducing the possibility of deformation or damage of the first molding part under stress. At the same time, the second molding part is provided with a groove to accommodate the boss, which reduces the size of the overall structure along the thickness direction and is conducive to the miniaturized design of the structure.

[0009] In a possible implementation, a concave hole is provided on the bottom surface of the groove corresponding to the position of the separation groove, and a convex column is provided on the boss corresponding to the position of the separation portion, and the convex column matches the concave hole.

[0010] In this embodiment, the first molded part and the second molded part can be positioned and fastened by the cooperation of the concave hole and the convex column, and the combination of the first molded part and the second molded part is further improved. In addition, when the second molded part is secondary molded on the first molded part, the shrinkage of the material of the second molded part will cause the material around the concave hole to shrink and wrap the convex column, further improving the combination of the second molded part and the first molded part.

[0011] In a possible implementation manner, the projections of the boss and the groove in a plane parallel to the first surface are polygonal, and at least some of the corners of the polygon are provided with rounded corners or chamfers.

[0012] In this embodiment, the polygonal bosses and grooves can achieve mutual limitation in the second direction and the third direction and limit rotation around an axis parallel to the first direction. Rounded corners or chamfered transitions are provided at the corners, which can reduce stress concentration at the corners and reduce the problem of deformation and cracking at the corners.

[0013] In a possible embodiment, the first molded portion has a first surface, the connecting hole includes a first hole segment and a second hole segment, the first hole segment is recessed from the first surface, the second hole segment is connected to an end of the first hole segment away from the first surface, and the cross-section of the second hole segment is larger than the first hole segment. The second molded portion has a second surface, the connecting portion includes a first connecting segment and a second connecting segment, the first connecting segment is convexly arranged on the second surface of the main body, and the second connecting segment is connected to an end of the first connecting segment away from the main body. The first connecting segment cooperates with the first hole segment, and the second connecting segment cooperates with the second hole segment.

[0014] In this embodiment, the main body and the T-shaped connecting portion are connected to form an I-shape. When the door panel and the swing arm are secondary molded, the molding material of the swing arm shrinks along the first direction to form a clamping force, which will make the part sandwiched between the main body and the second connecting section of the I-shaped second molding part reliably combined with the first molding part, ensuring the firmness of the combination of the two, and can reliably limit the displacement of the second molding part relative to the first molding part along the first direction, thereby improving the integrity and structural dimensional accuracy of the two.

[0015] In a possible implementation, the edge lines at both end surfaces of the first hole segment in the depth direction are provided with rounded corners or chamfered transitions; and / or the edge line of the second hole segment close to one end of the first hole segment is provided with rounded corners or chamfered transitions.

[0016] In this embodiment, by making a rounded or chamfered transition at the edge lines of the first hole segment and the second hole segment, on the one hand, the contact and joining area between the connecting portion and the connecting hole can be increased, and on the other hand, stress concentration at the corner can be reduced, thereby reducing the problem of shrinkage and cracking of the formed swing arm door panel at the joint.

[0017] In a possible implementation, the depth direction of the connection hole is along the first direction, and the plurality of connection holes are spaced apart along the second direction. A strip portion is connected between two side surfaces of the connection hole along the second direction, and the strip portion is located on the side of the connection hole close to the second forming portion along the first direction. The connection portion is provided with a strip hole, and the strip portion matches the strip hole.

[0018] In this embodiment, the second molding part secondary molded on the first molding part, the side hole surfaces of the strip hole of which surround the strip part, are limited to the first molding part in the first direction and the third direction (the third direction is perpendicular to the first direction and the second direction), and the connection part and the connection hole are limited along the end surface of the second direction, so that the second molding part and the first molding part can be limited in the second direction. In addition, the strip part along the second direction is provided in combination with the second molding part, so that the first molding part and the second molding part can be positioned and guided along the second direction, and the direction consistency along the second direction can be ensured after the two are combined.

[0019] In a possible implementation, the length direction of the door panel is the second direction, and the connecting hole is in the shape of a long strip extending along the second direction.

[0020] In this embodiment, by making the connecting hole in the shape of an elongated strip along the second direction, the cooperation between the connecting hole and the connecting part can limit the rotation of the second molded part relative to the first molded part around an axis parallel to the first direction, thereby ensuring the consistency of the relative directions of the first molded part and the second molded part, and ensuring the dimensional accuracy and degree of integration of the first molded part of the second molded part.

[0021] In a possible implementation, the first molded part includes a door panel, and the second molded part includes a swing arm.

[0022] In this embodiment, the swing arm door panel is divided into a door panel and a swing arm.

[0023] In a possible embodiment, the thickness direction of the door panel is the first direction, and the length direction of the door panel is the second direction. The door panel has a first surface, the first surface is perpendicular to the first direction, and a boss is convexly provided on the first surface; the door panel is provided with two connection holes spaced along the second direction, and a partition is provided between the two connection holes; the connection hole is located inside the outer contour of the boss and penetrates the door panel along the thickness direction; a boss is provided at the position of the boss corresponding to the partition. The swing arm includes a main body and two connection parts, the main body includes a rotating arm, and the rotating arm is used to rotate and match with the base; the main body has a second surface, and the main body has a groove concave from the second surface, the two connection parts are respectively convexly provided on the bottom surface of the groove, and the two connection parts are spaced along the second direction, and a partition groove is provided between the two connection parts; a concave hole is provided on the bottom surface of the partition groove. The swing arm is integrally formed on the door panel by secondary molding, and the second surface is superimposed on the first surface, the boss is matched with the groove, the boss is matched with the concave hole, the two connection parts are respectively matched with the two connection holes, and the two connection parts are clamped on both sides of the partition and the boss.

[0024] In this embodiment, through the coordination of the boss and the groove, the coordination of the boss and the recessed hole, the coordination of the two connecting parts and the two connecting holes, and the partition part as the molding reference of the two connecting parts, the integrity and relative position accuracy of the door panel and the swing arm can be greatly improved.

[0025] In a possible embodiment, the swing arm door panel component includes a plurality of sub-structural segments, each of which includes a door panel segment and a swing arm, the door panel segment extends along a second direction, and the plurality of door panel segments are connected along the second direction; the first molded portion includes a portion of the plurality of sub-structural segments, and the second molded portion includes another portion of the plurality of sub-structural segments.

[0026] In this embodiment, the swing arm door panel is divided into a plurality of sub-structure sections, which is suitable for forming a swing arm door panel with a larger length.

[0027] In a possible embodiment, there are three sub-structure segments, the sub-structure segment located in the middle is the first sub-structure segment, and the two sub-structure segments located on both sides are the second sub-structure segments; the first forming part includes the first sub-structure segment, and the second forming part includes the second sub-structure segment; the door panel segment of the first sub-structure segment is provided with first overlapping segments at both ends along the second direction, and the thickness of the first overlapping segment is less than the thickness of the door panel; the first overlapping segment is provided with two connecting holes, the two connecting holes are spaced along the second direction, and a partition portion is provided between the two connecting holes; the door panel segment of the second sub-structure segment is provided with a second overlapping segment at one end close to the first sub-structure segment, and two connecting parts are protruding from the surface of one side of the second overlapping segment facing the first overlapping segment, the two connecting parts are spaced along the second direction, and a partition groove is provided between the two connecting parts; the second overlapping segment is overlapped with the first overlapping segment along the thickness direction, and the two connecting parts are respectively matched with the two connecting holes, the partition portion is matched with the partition groove, and the two connecting parts are respectively clamped on both sides of the partition portion.

[0028] In this embodiment, the integrity and relative position accuracy of the multiple sub-structure segments can be greatly improved through the cooperation of the two connecting parts and the two connecting holes and the partition part serving as the molding reference of the two connecting parts.

[0029] In a second aspect, an embodiment of the present application provides a foldable device, which includes a middle frame, a flexible screen and the aforementioned hinge mechanism. The middle frame is rotatably connected to a swing arm door panel; the flexible screen covers the middle frame and the hinge mechanism and is supported by the swing arm door panel.

[0030] The foldable device in this embodiment adopts the aforementioned hinge mechanism, which has high structural strength, dimensional accuracy and high degree of integration.

[0031] In a third aspect, an embodiment of the present application provides a method for preparing a shaft mechanism, which is used to prepare the aforementioned shaft mechanism. The method for preparing the shaft mechanism includes preparing a swing arm door panel. The preparation of the swing arm door panel includes:

[0032] preparing a first molded part;

[0033] A second molded portion is formed on the first molded portion through a secondary molding process, so that the second molded portion and the first molded portion are molded into an integrated swing arm door panel, and adjacent connecting portions of the molded second molded portion are clamped on both sides of the partition portion.

[0034] In the preparation method of the rotating shaft mechanism in this embodiment, the second molded part is molded on the first molded part, and the two are combined through multiple connecting holes and multiple connecting parts, which can achieve mutual limitation and high bonding strength, and the cooperation of the strip-shaped connecting holes and the connecting parts can limit the second molded part from rotating relative to the first molded part around an axis parallel to the first direction, thereby ensuring the consistency of the relative directions of the first molded part and the second molded part, and ensuring the dimensional accuracy and degree of integration of the rotating shaft mechanism.

[0035] In one possible implementation,

[0036] The first forming part includes a door panel, and the second forming part includes a swing arm; the door panel is formed first, and then the swing arm is secondary formed on the door panel, or,

[0037] The swing arm door panel component includes multiple sub-structural segments, each of which includes a door panel segment and a swing arm, the door panel segment extends along the second direction, and the multiple door panel segments are connected along the second direction; the first forming part includes a part of the multiple sub-structural segments, and the second forming part includes another part of the multiple sub-structural segments; the sub-structural segment of the first forming part is formed first, and then the sub-structural segment of the second forming part is formed on the sub-structural segment of the first forming part.

[0038] In this embodiment, the swing arm door panel can be divided and formed in two different division modes.

[0039] In a possible implementation, the molding material used for the second molding part is MIM metal, amorphous metal, plastic or Peek material, and the second molding part is integrally molded with the first molding part through MIM process, amorphous molding process or injection molding process.

[0040] In this embodiment, the first molded part can be molded using various materials and various secondary molding processes.

[0041] In a possible embodiment, the molding material used for the first molding part is MIM metal, stamping metal, 3D printing metal or amorphous metal, and the first molding part is formed by MIM process, 3D printing molding process, punching and forging molding process, CNC machining process or amorphous molding process.

[0042] In this embodiment, the first molded part can be made of various materials and various molding processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 A three-dimensional view of the foldable device of an embodiment of the present application when unfolded;

[0045] Figure 2 for Figure 1 A 3D view of a foldable device when folded;

[0046] Figure 3 for Figure 1A cross-sectional view of a foldable device along line AA;

[0047] Figure 4 for Figure 2 A cross-sectional view of a foldable device along line BB;

[0048] Figure 5 This is a structural diagram of a swing arm door panel according to an embodiment of the present application;

[0049] Figure 6 This is a structural diagram of a door panel according to an embodiment of the present application;

[0050] Figure 7 This is a structural diagram of a swing arm according to an embodiment of the present application;

[0051] Figure 8 for Figure 7 Enlarged view of point C;

[0052] Fig. 9 for Figure 8 Bottom view of

[0053] Fig.10 for Figure 6 Door panels and Figure 7 A cross-sectional view of the swing arm joint;

[0054] Fig.11 A partial view of another embodiment of the door panel of the present application;

[0055] Fig.12 for Fig.11 Sectional view along line DD;

[0056] Fig.13 A structural diagram of another implementation of the swing arm of the embodiment of the present application;

[0057] Fig.14 A partial view of another embodiment of the door panel of the present application;

[0058] Fig.15 for Fig.14 Bottom view of

[0059] Fig.16 for Fig.13 The swing arm and Fig.14 or Fig.15 A cross-sectional view of the door panel joint;

[0060] Fig.17 A schematic diagram of another division form of the swing arm door panel of an embodiment of the present application;

[0061] Fig.18 for Fig.17 Expanded view of the connection between adjacent substructure segments;

[0062] Fig.19 for Fig.17 Cross-sectional view of the connection between adjacent substructure segments.

[0063] Description of main component symbols:

[0064] Foldable Devices 100

[0065] First middle frame 101

[0066] Second middle frame 102

[0067] Flexible screen 103

[0068] Rotating shaft mechanism 110

[0069] Base 111

[0070] Door panel 112

[0071] Swing arm 113

[0072] Swing arm door panel 115

[0073] The first molding part 11

[0074] Second molding part 12

[0075] Rotating arm 13

[0076] Main body 14

[0077] Connection part 15

[0078] Partition 16

[0079] Boss 17

[0080] Boss 18

[0081] Rounded Corner 19

[0082] Chamfer 20

[0083] Strip portion 21

[0084] Substructure segment 22

[0085] First partial structural segment 22a

[0086] Second substructure segment 22b

[0087] Door panel section 23

[0088] First folding section 24a

[0089] The second overlapping section 24b

[0090] First connecting section 25

[0091] Second connecting section 26

[0092] Connection hole K1

[0093] First hole section K2

[0094] Second hole section K3

[0095] Concave hole K4

[0096] Strip hole K5

[0097] Separation slot C1

[0098] Groove C2

[0099] First direction Z

[0100] Second direction X

[0101] The third direction Y

[0102] First surface P1

[0103] Second surface P2 DETAILED DESCRIPTION

[0104] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0105] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a centered element. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0106] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0107] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0108] Example

[0109] Foldable devices, such as some foldable mobile phones and tablet computers, are folded or unfolded through a hinge mechanism.

[0110] Figure 1 and Figure 2 A foldable device 100 is shown, which is specifically a foldable mobile phone. The foldable device 100 mainly includes two middle frames (named as the first middle frame 101 and the second middle frame 102 respectively), a flexible screen 103 and a hinge mechanism 110. The first middle frame 101 and the second middle frame 102 are respectively connected to the two sides of the hinge mechanism 110, and the flexible screen 103 covers the first middle frame 101, the hinge mechanism 110 and the second middle frame 102. Through the hinge mechanism 110, the first middle frame 101 and the second middle frame 102 of the foldable device 100 can be relatively unfolded or folded, and at the same time drive the flexible screen 103 to unfold or fold. For the unfolded state of the foldable device 100, please refer to Figure 1 , see the folded state Figure 2 .

[0111] Figure 1 and Figure 2 The foldable device 100 shown is an outer folding device, that is, the flexible screen 103 after folding is located outside the first middle frame 101 and the second middle frame 102. In other embodiments, the foldable device 100 can also be an inner folding device, that is, the flexible screen 103 after folding is located between the first middle frame 101 and the second middle frame 102.

[0112] In other embodiments, the foldable device 100 may also be a device that can be folded twice or more, which is not limited here.

[0113] See also Figure 3 and Figure 4 In this embodiment, the hinge mechanism 110 includes a base 111 and two swing arm door panels 115. The two swing arm door panels 115 are respectively connected to two sides of the base 111 and are used to connect the first middle frame 101 and the second middle frame 102 respectively.

[0114] See also Figure 5 The swing arm door panel 115 in this embodiment has an integrated door panel 112 and a swing arm 113 . The swing arm 113 is used to rotatably cooperate with the base 111 , and the door panel 112 is used to support the flexible screen 103 of the foldable device 100 .

[0115] In this embodiment, the swing arm door panel 115 rotates with the middle frame and the base 111 to form a rotation pair. Through these rotation pairs, in the unfolded state of the flexible screen 103 (see Figure 3 ), the two door panels 112 coplanarly support the unfolded flexible screen 103; in the folded state of the flexible screen 103 (see Figure 4), the two door panels 112 are rotated at a certain angle relative to the base 111, so as to reliably support the bent flexible screen 103, which is conducive to adapting the support of the flexible screen 103 in different states.

[0116] See again Figure 5 In this embodiment, the swing arm door panel 115 includes a door panel 112 and a plurality of swing arms 113 (three in the figure). The door panel 112 is a long strip-shaped plate-like structure extending along the second direction X, and the thickness direction is along the first direction Z. The door panel 112 is used to support the flexible screen 103. The plurality of swing arms 113 are sequentially formed on the door panel 112 at intervals along the second direction X, and are used to form a revolving pair with other components.

[0117] Figure 5 The swing arm 113 is a double-rotation swing arm, which is formed integrally from two swing arm parts. One side of the double-rotation swing arm is used for rotationally connecting the base 111, and the other side is used for rotationally connecting the first middle frame 101 / the second middle frame 102, thereby forming two rotation pairs.

[0118] Figure 5 The swing arm door panel 115 shown is used as a single structural member for the rotating shaft mechanism 110, which can reduce the number of assembled parts of the rotating shaft mechanism 110 and reduce the impact of the assembly error between the door panel 112 and the swing arm 113 on the rotation accuracy of the rotating shaft mechanism 110. In addition, through integrated molding, the increase in thickness of the rotating shaft mechanism 110 caused by the additional connection requirements of the door panel 112 and the swing arm 113 can also be reduced, which is conducive to the thinning design of the rotating shaft mechanism 110 and even the overall thickness of the foldable device 100.

[0119] In some known technologies, the swing arm and door panel of the pivot mechanism are obtained by forming them separately and then connecting them. That is, the door panel and the swing arm are first formed separately and then connected together by welding or gluing. This method of connecting the swing arm and the door panel separately after forming has high requirements on the accuracy of the individual parts, especially the size of the connection of the individual parts needs to be accurately matched, and the manufacturing cost is high. In addition, it is difficult to ensure the relative position accuracy between the individual parts by welding or gluing, which makes it difficult to ensure the accuracy of the rotation pairs on both sides of the swing arm door panel combination structure. The assembled pivot mechanism is prone to jamming, which affects the yield of the pivot mechanism.

[0120] Figure 5 The swing arm door panel 115 shown as an integrated structural member can be composed of two or more molded parts. For example, the swing arm door panel 115 includes two molded parts, which are respectively named as a first molded part 11 and a second molded part 12. The division of the first molded part 11 and the second molded part 12 of the swing arm door panel 115 can be determined as needed.

[0121] For example, Figure 6-Figure 10A first division method of the swing arm door panel 115 is shown; Figure 17-Figure 19 Another way of dividing the swing arm door panel 115 is shown, which will be introduced below.

[0122] See also Figure 6 and Figure 7 In this embodiment, the first molded portion 11 of the swing arm door panel 115 is Figure 7 The door panel 112 in the second molding portion 12 is Figure 6 The swing arm 113 in the embodiment of the present invention.

[0123] When manufacturing the swing arm door panel 115, the door panel 112 can be formed first, and then three swing arms 113 can be formed on the door panel 112 through secondary molding, thereby forming an integrated swing arm door panel 115; or the three swing arms 113 can be formed first, and then the door panel 112 can be formed on the three swing arms 113 through secondary molding, thereby forming an integrated swing arm door panel 115.

[0124] In other embodiments, the number of the swing arms 113 may also be set to other numbers as needed, which is not limited here.

[0125] In other embodiments, the swing arm 113 may also include only one side of the swing arm portion, so that it only forms one rotation pair. The swing arm 113 may also be replaced by other structures attached to the door panel 112.

[0126] In order to ensure reliable combination of the door panel 112 and the swing arm 113, in this embodiment, parts for matching with each other are respectively provided on the door panel 112 and the swing arm 113.

[0127] See also Figure 8 and Fig. 9 The door panel 112 is a long strip-shaped plate-like structure. The side surface of the door panel 112 facing the swing arm 113 along the thickness direction (i.e., the first direction Z) is the first surface P1, and the boss 17 is protruded from the first surface P1. The shape of the outer contour of the boss 17 in the plane parallel to the first surface P1 is non-circular, for example, a polygon. The door panel 112 is provided with two connecting holes K1 in the part inside the outer contour of the boss 17, and the two connecting holes K1 pass through the door panel 112 along the first direction Z respectively. The two connecting holes K1 are spaced along the length direction of the door panel 112 (i.e., the second direction X), so that a partition 16 is defined between the two connecting holes K1. Optionally, adjacent connecting holes K1 are staggered along the width direction of the door panel 112 (i.e., the third direction Y).

[0128] The boss 17 is provided with a boss 18 at a position corresponding to the partition 16. Optionally, the maximum dimension of the boss 18 is set within 1.0 mm. The boss 18 can be a cylindrical, prism or special-shaped columnar structure.

[0129] In this embodiment, the connecting hole K1 includes a first hole segment K2 and a second hole segment K3, the first hole segment K2 is recessed from the first surface P1, the second hole segment K3 is connected to an end of the first hole segment K2 away from the first surface P1, and the cross-section of the second hole segment K3 is larger than the first hole segment K2, so that the connecting hole K1 is T-shaped. The shape of the first hole segment K2 and the shape of the second hole segment K3 can be the same or different, for example Figure 8 and Fig. 9 As shown in FIG. 1 , the first hole segment K2 is an oval shape, and the second hole segment K3 is a shape combining a rectangle and a single-sided semicircle.

[0130] Correspondingly, if Figure 6 The swing arm 113 shown includes a main body 14 and two connecting parts 15. The main body 14 includes two rotating arms 13, which are used to rotate and cooperate with the base 111 and the middle frame respectively. The main body 14 has a second surface P2, and the main body 14 has a groove C2 recessed from the second surface P2, and the two connecting parts 15 are respectively convexly arranged on the groove bottom surface of the groove C2, and the two connecting parts 15 are spaced along the second direction X, and a separation groove C1 is defined between the two connecting parts 15; the groove bottom surface of the separation groove C1 is provided with an inwardly concave hole K4.

[0131] The connecting portion 15 is T-shaped (see Fig.10 ), the connecting portion 15 and the main body 14 form an I-shaped structure. The connecting portion 15 includes a first connecting section 25 and a second connecting section 26, the first connecting section 25 is connected to the main body 14, and the second connecting section 26 is connected to an end of the first connecting section 25 away from the main body 14.

[0132] Fig.10 Shows Figure 6 The swing arm 113 is integrally formed in Figure 7-Figure 9 The state after the door panel 112.

[0133] See also Fig.10 The swing arm 113 is integrally formed on the door panel 112 by secondary molding, the second surface P2 overlaps the first surface P1, the boss 17 is matched with the groove C2, the boss 18 is matched with the concave hole K4, the two connecting parts 15 are respectively matched with the two connecting holes K1, and the two connecting parts 15 are clamped on both sides of the partition 16 and the boss 18. Among them, the first connecting section 25 of the connecting part 15 is matched with the first hole section K2 of the connecting hole K1, and the second connecting section 26 of the connecting part 15 is matched with the second hole section K3 of the connecting hole K1.

[0134] In the swing arm door panel 115, the connecting portion 15 is matched in the connecting hole K1, so that the swing arm 113 and the door panel 112 are combined into one body and form a mutual limit, ensuring the reliable combination between the door panel 112 and the swing arm 113. The I-shaped structure formed by the main body 14 and the T-shaped connecting portion 15 is matched with the door panel 112. When the swing arm 113 is secondary molded on the door panel 112, the molding material of the swing arm 113 shrinks along the first direction Z to form a clamping force, which will make the part sandwiched between the second surface P2 of the swing arm 113 and the second connecting section 26 reliably combined with the door panel 112, ensuring the firmness of the combination of the two, and being able to reliably limit the displacement of the swing arm 113 relative to the door panel 112 along the first direction Z, improving the integrity and structural dimensional accuracy of the two.

[0135] For the implementation embodiment in which the connecting hole K1 is in the shape of an elongated strip extending along the length direction of the door panel 112 (i.e., the second direction X), the cooperation between the connecting hole K1 and the connecting portion 15 can limit the rotation of the swing arm 113 relative to the door panel 112 around an axis parallel to the first direction Z, thereby ensuring the consistency of the relative directions of the door panel 112 and the swing arm 113, and ensuring the dimensional accuracy and degree of integration of the swing arm door panel 115.

[0136] By matching the two connection holes K1 arranged at intervals with the two connection parts 15 of the swing arm 113, the connection reliability between the swing arm 113 and the door panel 112 can be further improved. At the same time, the partition 16 between the connection holes K1 is matched in the partition groove C1, which can further improve the limiting effect of the door panel 112 on the swing arm 113 along the second direction X. In addition, the partition 16 located in the middle can limit the displacement of the swing arm 113 to the left or right relative to the door panel 112 along the second direction X, and the limiting effect is better. At the same time, the connection parts 15 on both sides are formed on both sides of the partition 16, and can be shrunk with the partition 16 as the reference during molding, ensuring the relative position of the connection part 15 and the door panel 112 is accurate, which is conducive to ensuring the structural accuracy of the molded swing arm door panel 115, ensuring the accurate matching of the swing arm door panel 115 with the base 111 or its frame, and ensuring that the rotating shaft mechanism 110 rotates smoothly and is not easy to get stuck.

[0137] The matching and limiting of the polygonal boss 17 and the groove C2 can further limit the displacement of the swing arm 113 relative to the door panel 112 along the second direction X or the third direction Y, and limit the rotation of the two around the axis parallel to the first direction Z. In addition, by providing the boss 17, the thickness dimension of the door panel 112 connecting the swing arm 113 is thickened, which is conducive to improving the structural strength and rigidity of the location, and reducing the possibility of deformation or damage of the door panel 112 at the location. At the same time, the swing arm 113 is provided with a groove C2 to accommodate the boss 17, which reduces the size of the overall structure along the thickness direction, and is conducive to the miniaturized design of the structure.

[0138] Through the cooperation between the concave hole K4 and the convex column 18, the door panel 112 and the swing arm 113 can be positioned and fastened in the second direction X and the third direction Y, further improving the firmness of the combination between the door panel 112 and the swing arm 113. In addition, when the swing arm 113 is overmolded on the door panel 112, the material contraction of the swing arm 113 causes the material around the concave hole K4 to contract and wrap the convex column 18 in the second direction X and the third direction Y, further improving the firmness of the combination between the swing arm 113 and the door panel 112.

[0139] The embodiment in which adjacent connection holes K1 are staggered along the third direction Y increases the total matching size of the swing arm 113 and the door panel 112 in the third direction Y. At the same time, the non-collinear staggered arrangement can also reduce the degree of rotation of the two connection parts 15 around the centers of the two in the collinear situation, thereby improving the relative position reliability of the swing arm 113 and the door panel 112.

[0140] Based on the above description, we can see that Figure 7-10 The swing arm door panel 115 shown, in which the door panel 112 and the swing arm 113 are connected to each other through the material bonding force of the contact interface between the two, can also ensure the relative position accuracy of the two and make the two hold each other tightly through the mutual limiting structure and rotation limiting structure between the door panel 112 and the swing arm 113 in the first direction Z, the second direction X, and the third direction Y.

[0141] Furthermore, in the implementation mode of first forming the door panel 112 and then secondary forming the swing arm 113 on the door panel 112, the partition 16 and the boss 18 on the first formed door panel 112 can be used as a forming reference for the swing arm 113, so that when the swing arm 113 is secondary formed, the two connecting parts 15 of the swing arm 113 are contracted toward each other with the partition 16 as a reference, thereby ensuring the relative position accuracy between the swing arm 113 and the door panel 112 after forming.

[0142] By manufacturing the swing arm door panel 115 by secondary molding, the design requirements for dimensional accuracy at the joint surface between the door panel 112 and the swing arm 113 can also be reduced.

[0143] Fig.11 and Fig.12 Another embodiment of a door panel 112 is shown. Fig.11 and Fig.12 The door panel 112 and Figure 8-Figure 9 The difference of the door panel 112 lies mainly in the following two points:

[0144] First point, Fig.11 and Fig.12In the door panel 112, a rounded corner 19 or a chamfered corner 20 is provided at the corner of the outer contour of the polygonal boss 17. The rounded corner 19 or the chamfered corner transition can increase the contact and bonding area between the boss 17 and the groove C2, and can reduce stress concentration at the corner, thereby reducing the shrinkage and cracking problem of the formed swing arm door panel 115 at the bonding point.

[0145] Second point, Fig.11 and Fig.12 In the door panel 112, the edge lines of the first hole segment K2 at both end surfaces along the first direction Z are provided with fillets 19 or chamfers 20 for transition, and the edge lines of the second hole segment K3 near one end of the first hole segment K2 along the first direction Z are provided with fillets 19 or chamfers for transition. The fillets 19 or chamfers 20 can increase the contact and bonding area between the connection portion 15 and the connection hole K1, and reduce stress concentration at the corners, thereby reducing the problem of shrinkage and cracking at the bonding of the formed swing arm door panel 115.

[0146] Figure 13-Figure 16 The door panel 112 and the swing arm 113 shown are different from Figure 7-10 The door panel 112 and the swing arm 113 adopt a combined structure.

[0147] See also Fig.14 and Fig.15 The door panel 112 is provided with two connection holes K1 spaced apart along the second direction X. The connection holes K1 are straight holes, for example, straight holes with a rectangular cross section whose length direction is along the second direction X. A partition 16 is defined between the two connection holes K1. A strip portion 21 is connected between two side surfaces of the connection holes K1 along the second direction X. The strip portion 21 is a long strip structure extending along the second direction X, and the strip portion 21 is located on the side close to the swing arm 113 along the first direction Z.

[0148] Correspondingly, see Fig.13 The swing arm 113 includes a main body 14 and two connecting parts 15, which are spaced apart from each other along the second direction X and are respectively integrally formed on the main body 14. A separation groove C1 is defined between the two connecting parts 15, and the connecting part 15 is a rectangular block structure and has a strip hole K5 extending along the second direction X.

[0149] See also Fig.16, the strip hole K5 is adapted to the strip portion 21, the connecting portion 15 is matched with the connecting hole K1, and the partition groove C1 is matched with the partition portion 16. The swing arm 113, which is secondary molded on the door panel 112, has the strip hole K5 on each side surface surrounding the strip portion 21, so that it is limited to the door panel 112 in the first direction Z and the third direction Y. At the same time, the connection portion 15 and the connecting hole K1 are limited along the end surface of the second direction X, so that the swing arm 113 and the door panel 112 can be limited in the second direction X. In addition, the strip portion 21 along the second direction X is provided to be combined with the swing arm 113, so that the positioning and guiding of the door panel 112 and the swing arm 113 along the second direction X can be achieved, and the directional consistency of the two along the second direction X after the combination is ensured. Optionally, the cross-section of the strip portion 21 in a plane perpendicular to the second direction X is square, which can limit the swing arm 113 from rotating relative to the door panel 112 around a rotation axis parallel to the second direction X, thereby ensuring the integrity and firmness of the door panel 112 and the swing arm 113.

[0150] at the same time, Figure 13-Figure 16 In the embodiment shown, the door panel 112 can also be provided with a convex column 18 to match the concave hole K4 of the swing arm 113. For details, see Figure 7-10 The corresponding description is not repeated here.

[0151] Figure 17-Figure 19 Shows Figure 5 The second division form of the swing arm door panel 115.

[0152] See also Fig.17 The swing arm door panel 115 includes a plurality of sub-structure segments 22 (such as Fig.17 The substructure segment 22 shown in the figure includes a door panel segment 23 and a swing arm 113 integrally provided on the door panel segment 23. The door panel segment 23 and the swing arm 113 can be integrally formed by the same material, such as casting, 3D printing, etc., or can be secondary molded by the same or different materials. Multiple door panel segments 23 are combined along the second direction X to form Figure 5 The swing arm door panel 115 is shown. One of the adjacent sub-structure segments 22 serves as the first molded portion 11 , and the other serves as the second molded portion 12 .

[0153] For example, Fig.17 In the figure, the middle sub-segment 22 is the first sub-segment 22a, and the sub-segments 22 on both sides are the second sub-segments 22b. The first sub-segment 22a is first formed as the first molding part 11, and the second sub-segment 22b is formed on the first sub-segment 22a as the second molding part 12 by secondary molding.

[0154] The connection between the door panel section 23 of the first sub-structure section 22a and the door panel section 23 of the second sub-structure section 22b is shown in FIG. Fig.18 and Fig.19 .

[0155] See also Fig.18 and Fig.19 A first overlapping section 24a is provided at the end of the door panel section 23 of the first substructure section 22a along the second direction X, and the thickness of the first overlapping section 24a is less than the thickness of the door panel section 23; the first overlapping section 24a is provided with two connecting holes K1, and the two connecting holes K1 are spaced apart along the second direction X, and a partition 16 is defined between the two connecting holes K1.

[0156] The door panel section 23 of the second sub-structure section 22b is provided with a second overlapping section 24b at one end close to the first sub-structure section 22a. The second overlapping section 24b is provided with two connecting parts 15 protruding from a surface of one side facing the first overlapping section 24a. The two connecting parts 15 are spaced apart along the second direction X and define a separation groove C1 therebetween.

[0157] The second overlapping section 24 b overlaps with the first overlapping section 24 a along the thickness direction, and the two connecting portions 15 are respectively matched with the two connecting holes K1 , the partitioning portion 16 is matched with the partitioning groove C1 , and the two connecting portions 15 are respectively clamped on both sides of the partitioning portion 16 .

[0158] Optionally, the total thickness (dimension along the first direction Z) of the two first overlapping sections 24a and the second overlapping section 24b after overlapping is equal to the thickness of the door panel section 23. In this way, the thickness of the door panel 112 of the swing arm door panel 115 after forming is kept consistent in the length direction.

[0159] The shape of the connection hole K1 and the shape of the connection portion 15 in this embodiment can be referred to Figure 7-10 That is, the connection hole K1 in this embodiment can be set as a T-shaped hole, and correspondingly, the connection part 15 is T-shaped to fit the connection hole K1, and the connection part 15 and the second overlapping section 24b are connected to form an I-shaped structure.

[0160] The connecting portion 15 and the second overlapping section 24b are connected to form an I-shape, and combined with the T-shaped connecting hole K1, the two first overlapping sections 24a and the second overlapping sections 24b can reliably limit each other in the first direction Z, the second direction X and the third direction Y, ensuring that the swing arm door panel 115 formed by the combination of the two has high integrity and structural accuracy. When the second overlapping section 24b and the connecting portion 15 connected to form an I-shape are formed on the first sub-structure section 22a through a secondary molding process, they can also hold the other sub-structure section 22 tightly through the shrinkage of the material, which can further improve the reliability of the combination of the two.

[0161] In other embodiments, the connection hole K1 may also be a tapered hole, and correspondingly, the connection portion 15 may be an inverted cone. The cooperation between the tapered hole and the inverted cone facilitates the first overlapping section 24a and the second overlapping section 24b to be tightly held together.

[0162] In this embodiment, the swing arm door panel 115 is formed by integrally molding the first molding part 11 and the second molding part 12. In addition to being used for the aforementioned swing arm door panel 115, it can also be used for the door panel, shaft cover, support plate or other structures of the foldable device 100, and can also be used for structural parts of other products, which is not limited here.

[0163] This embodiment also provides a method for preparing a rotating shaft mechanism, which is used to prepare the aforementioned rotating shaft mechanism 110 .

[0164] In conjunction with the above-mentioned figures, the method for preparing the rotating shaft mechanism 110 in this embodiment includes:

[0165] Preparing a first molded part 11;

[0166] The second molded portion 12 is secondary molded on the first molded portion 11 , so that the second molded portion 12 and the first molded portion 11 are molded into an integrated swing arm door panel 115 , and the adjacent connecting portions 15 of the molded second molded portion 12 are clamped on both sides of the partition portion 16 .

[0167] Optionally, the first molding part 11 is formed by a MIM (Metal Injection Molding) process, a 3D printing molding process, a punching molding process, a CNC (Computer Numerical Control) processing process or an amorphous molding process; the molding material used for the first molding part 11 is a MIM metal, a stamping metal, a 3D printing metal or an amorphous metal;

[0168] Optionally, the second molding part 12 is integrally formed on the first molding part 11 by MIM process, amorphous molding process or injection molding process; the molding material used for the second molding part 12 is MIM metal, amorphous metal, plastic or Peek (polyetheretherketone) material.

[0169] The swing arm door panel 115 can be manufactured by multiple molding methods. According to the division of each molding part and the molding sequence, multiple preparation methods can be selected, which will be described exemplarily below.

[0170] The first preparation method:

[0171] The swing arm door panel 115 is divided into a door panel 112 and a plurality of swing arms 113. The door panel 112 of the swing arm door panel 115 is used as the first molding part 11 and is prepared by one-time molding; the swing arm 113 is used as the second molding part 12 and is molded on the door panel 112 by a secondary molding process, thereby obtaining an integrated swing arm door panel 115.

[0172] In one-step molding, the molding material of the door panel 112 can be stainless steel, titanium alloy, etc., and the molding method can be MIM molding, 3D printing molding, precision casting molding, CNC machining molding after punching and forging, amorphous molding, etc. The structure of the door panel 112 for combining with the swing arm 113 (such as the aforementioned connecting hole K1) can be directly molded on the door panel 112 in one-step molding, and can also be processed on the door panel 112 through a post-process (such as CNC machining) after one-step molding.

[0173] In the secondary molding, the swing arm 113 can be formed on the door panel 112 by secondary MIM molding, secondary vacuum die casting, secondary injection molding, etc. The material of the secondary molding can be the same as that of the primary molding, or it can be different.

[0174] In combination with the aforementioned I-shaped swing arm 113 and the door panel 112 with a T-shaped connecting hole K1, as well as the structural designs of the double connecting portion 15, the boss 17, the boss 18, etc., after the swing arm 113 is formed on the door panel 112, a double-hole positioning column staggered structure is formed between the swing arm 113 and the door panel 112, which can achieve mutual positioning and connection in the first direction Z, the second direction X and the third direction Y, and can also achieve the function of preventing relative rotation energy. The two connecting portions 15 of the formed swing arm 113 are respectively contracted based on the partition portion 16, so that a swing arm door panel 115 with high reliability and precision can be obtained.

[0175] The second preparation method:

[0176] Compared with the first preparation method, the molding order of the door panel 112 and the swing arm 113 is changed, and multiple swing arms 113 are molded once as the first molding part 11; then the door panel 112 as the second molding part 12 is obtained by secondary molding on the multiple swing arms 113, thereby obtaining an integrated swing arm door panel 115.

[0177] The third preparation method:

[0178] Compared with the first preparation method, the division method of the swing arm door panel 115 is changed, and the swing arm door panel 115 is divided into multiple sub-structure segments 22 along the length direction (i.e., the second direction X). First, one or more sub-structure segments 22 (defined as first sub-structure segments 22a) are formed at one time, and then, based on the formed sub-structure segments 22, the remaining sub-structure segments 22 (defined as second sub-structure segments 22b) are secondary molded. For example, Fig.17In the manner described above, the swing arm door panel 115 is divided into three sub-structure segments 22. During the primary molding, the middle sub-structure segment 22 (i.e., the first sub-structure segment 22a) is molded first, and then the left sub-structure segment 22 (i.e., the second sub-structure segment 22b) and the right sub-structure segment 22 (i.e., the second sub-structure segment 22b) are molded on the middle sub-structure segment 22 to obtain an integrated swing arm door panel 115. The “left”, “middle”, and “right” here are represented by Fig.17 The status description in .

[0179] The adjacent first sub-structure segment 22a and the second sub-structure segment 22b are connected through the two connecting holes K1 of the first overlapping segment 24a and the two connecting parts 15 of the second overlapping segment 24b, so that reliable connection can be achieved. A clear dividing line may exist at the connection position.

[0180] The one-step molding may be performed using a MIM process, and the length (dimension along the second direction X) of the obtained first substructure segment 22a may be limited to less than 70.0 mm.

[0181] The preparation method is applicable to a swing arm door panel 115 having a length greater than 60.0 mm.

[0182] When the thickness of the swing arm door panel 115 is small and cannot be layered into the first overlapping section 24a and the second overlapping section 24b in terms of thickness, the long end faces of the first sub-structure section 22a and the second sub-structure section 22b can be directly combined, and the combination strength can be strengthened by additional welding or the like.

[0183] In other embodiments, the swing arm door panel 115 may also be prepared by other methods, such as single molding of materials such as stainless steel, titanium alloy, zirconium-based amorphous alloy, etc., and the obtained swing arm door panel 115 has no obvious boundary lines or interfaces between the parts. The single molding method may be MIM molding, amorphous molding, 3D printing molding, precision casting, etc.

[0184] Based on the above description, the pivot mechanism 110 in the embodiment of the present application has a high bonding strength between the first molded part 11 and the second molded part 12, and the adjacent connecting part 15 of the second molded part 12 is secondary molded by using the partition part 16 of the first molded part 11 as a reference, which can ensure a higher relative position accuracy between the swing arm 113 and the door panel 112, and is conducive to the smooth rotation coordination of the pivot mechanism 110 and other structures without getting stuck.

[0185] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A rotating shaft mechanism, Features: It comprises a base and a swing arm door panel, wherein the swing arm door panel is rotatably connected to the base; The swing arm door panel comprises a first molded portion and a second molded portion that are integrally molded; The first forming portion is provided with a plurality of connecting holes, and a partition portion is provided between adjacent connecting holes; The second molding part includes a main body and a plurality of connecting parts connected to the main body, and a partition groove is provided between adjacent connecting parts; the plurality of connecting parts are respectively molded in the plurality of connecting holes, and the partition groove cooperates with the partition part.

2. The rotating shaft mechanism according to claim 1, Features: A surface of the first forming portion facing the second forming portion is a first surface, a boss is provided on the first surface, and the connecting hole is located inside the outer contour of the boss; The second molding portion has a second surface, the second surface is provided with a groove, and the connecting portion is convexly arranged on the bottom surface of the groove; The boss matches the groove, and projections of the boss and the groove in a plane parallel to the first surface are non-circular.

3. The rotating shaft mechanism according to claim 2, Features: A concave hole is provided on the bottom surface of the groove corresponding to the position of the dividing groove; The boss is provided at a position corresponding to the partition portion, and the boss matches the concave hole.

4. The rotating shaft mechanism according to claim 2, Features: The projections of the boss and the groove in a plane parallel to the first surface are polygonal, and at least some of the corners of the polygon are rounded or chamfered.

5. The rotating shaft mechanism according to claim 1, Features: The first forming portion has a first surface, the connecting hole includes a first hole segment and a second hole segment, the first hole segment is recessed from the first surface, the second hole segment is connected to an end of the first hole segment away from the first surface, and the cross-section of the second hole segment is larger than that of the first hole segment; The second molding portion has a second surface, the connecting portion includes a first connecting segment and a second connecting segment, the first connecting segment is convexly arranged on the second surface of the main body, and the second connecting segment is connected to an end of the first connecting segment away from the main body; The first connecting section matches with the first hole section, and the second connecting section matches with the second hole section.

6. The rotating shaft mechanism according to claim 5, Features: The edge lines at both end surfaces of the first hole segment in the depth direction are provided with rounded corners or chamfered transitions; and / or, the edge line of the second hole segment close to one end of the first hole segment is provided with rounded corners or chamfered transitions.

7. The rotating shaft mechanism according to claim 1, Features: The depth direction of the connection hole is along the first direction, and the plurality of connection holes are spaced apart and distributed along the second direction; A strip portion is connected between two side surfaces of the connection hole along the second direction, and the strip portion is located on a side of the connection hole close to the second forming portion along the first direction; The connecting portion is provided with a strip-shaped hole, and the strip-shaped portion matches the strip-shaped hole.

8. The rotating shaft mechanism according to claim 1, Features: The length direction of the door panel is the second direction, and the connecting hole is in the shape of a long strip extending along the second direction.

9. The rotating shaft mechanism according to any one of claims 1 to 8, Features: The first molded part includes a door panel, and the second molded part includes a swing arm.

10. The rotating shaft mechanism according to claim 9, Features: The thickness direction of the door panel is the first direction, and the length direction of the door panel is the second direction; The door panel has a first surface, the first surface is perpendicular to the first direction, and a boss is convexly provided on the first surface; the door panel is provided with two connection holes spaced apart along the second direction, and the partition is provided between the two connection holes; the connection hole is located inside the outer contour of the boss and passes through the door panel along the thickness direction; a convex column is provided at a position of the boss corresponding to the partition; The swing arm comprises a main body and two connecting parts, the main body comprises a rotating arm, and the rotating arm is used to rotate and cooperate with the base; the main body has a second surface, and the main body has a groove concave from the second surface, the two connecting parts are respectively convexly arranged on the bottom surface of the groove, and the two connecting parts are spaced along the second direction, and a separation groove is provided between the two connecting parts; the bottom surface of the separation groove is provided with a concave hole; The swing arm is integrally formed on the door panel by secondary molding, and the second surface overlaps the first surface, the boss cooperates with the groove, the convex column cooperates with the concave hole, the two connecting parts cooperate with the two connecting holes respectively, and the two connecting parts are clamped on both sides of the partition and the convex column.

11. The rotating shaft mechanism according to any one of claims 1 to 8, Features: The swing arm door panel member comprises a plurality of sub-structure segments, each of the sub-structure segments comprises a door panel segment and a swing arm, the door panel segment extends along a second direction, and the plurality of door panel segments are connected along the second direction; The first shaped portion includes a portion of the substructure segments among the plurality of substructure segments, and the second shaped portion includes another portion of the substructure segments among the plurality of substructure segments.

12. The rotating shaft mechanism according to claim 11, Features: There are three substructure segments, the substructure segment in the middle is the first substructure segment, and the two substructure segments on both sides are the second substructure segments; the first molded portion includes the first substructure segment, and the second molded portion includes the second substructure segment; The door panel section of the first substructure section is provided with first overlapping sections at both ends along the second direction, and the thickness of the first overlapping section is less than the thickness of the door panel; the first overlapping section is provided with two connecting holes, the two connecting holes are spaced apart along the second direction, and a partition is provided between the two connecting holes; A second overlapping section is provided at one end of the door panel section of the second sub-structure section close to the first sub-structure section, and two connecting parts are protruding from a surface of the second overlapping section facing the first overlapping section, the two connecting parts are spaced apart along the second direction, and a separation groove is provided between the two connecting parts; The second overlapping section overlaps with the first overlapping section along the thickness direction, and the two connecting parts respectively match with the two connecting holes, the partition part matches with the partition groove, and the two connecting parts are respectively clamped on both sides of the partition part.

13. A foldable device, It is characterized in that include: The rotating shaft mechanism according to any one of claims 1 to 12; A middle frame, rotatably connected to the swing arm door panel; The flexible screen covers the middle frame and the rotating shaft mechanism, and is supported by the swing arm door panel.

14. A method for preparing a rotating shaft mechanism, It is characterized in that Used to prepare the rotating shaft mechanism according to any one of claims 1 to 12, wherein the method for preparing the rotating shaft mechanism comprises preparing the swing arm door panel, and the preparation of the swing arm door panel comprises: preparing the first molded part; The second molded portion is formed on the first molded portion through a secondary molding process, so that the second molded portion and the first molded portion are molded into an integrated swing arm door panel, and the adjacent connecting portions of the molded second molded portion are clamped on both sides of the partition portion.

15. The method for preparing the rotating shaft mechanism according to claim 14, Features: The first molding part includes a door panel, and the second molding part includes a swing arm; the door panel is first molded, and then the swing arm is secondary molded on the door panel, or, The swing arm door panel component includes multiple sub-structural segments, each of which includes a door panel segment and a swing arm, the door panel segment extends along a second direction, and multiple door panel segments are connected along the second direction; the first molding part includes a part of the multiple sub-structural segments, and the second molding part includes another part of the multiple sub-structural segments; the sub-structural segments of the first molding part are molded first, and then the sub-structural segments of the second molding part are molded on the sub-structural segments of the first molding part.

16. The method for preparing the rotating shaft mechanism according to claim 14, Features: The molding material used for the second molding part is MIM metal, amorphous metal, plastic or Peek material, and the second molding part is secondary molded on the first molding part through MIM process, amorphous molding process or injection molding process.

17. The method for preparing the rotating shaft mechanism according to claim 14, Features: The molding material used for the first molding part is MIM metal, stamping metal, 3D printing metal or amorphous metal, and the first molding part is formed by MIM process, 3D printing molding process, punching and forging molding process, CNC machining process or amorphous molding process.

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